Temperature is a measurement of heat whereas heat is just an energy.
With that being said the heat is moving from hot to cold.
Answer:
Explanation:
So let's define both of these . these are two different things
Temperature : it's average kinetic energy of the particles within the system .
So if I increase the motion of particles ,the temperature will increase . If I decrease the motion of particles ,the temperature will decrease
Heat : it is the flow of energy due to temperature difference .
If I have a metal strip and I heat one side of it and the other side is cold then due to temperature difference ,heat will flow from the heated part of the metal strip to cold part of the strip.
------------------
Heat only provides a direction of the flow of heat while temperature is just the average kinetic energy of the substance ( it has no direction .BUT here are some more differences :
Heat is measured by a device called caloriometer
Temperature is measured by Thermometer
Unit of heat : joules
Unit if temperature : Kelvin
what do the symbols tell you about the conditions of the reaction shown to the right check all boxes that apply
Answer:
Sorry but erm was their supposed to be a image attach with it
Explanation:
Answer: options 1 and 4
Explanation:
Why is the greenhouse effect important to life on earth
Answer:
Because Greenhouse gases let the sun's light shine onto the Earth's surface, but they trap the heat that reflects back up into the atmosphere. And this way, they act like the glass walls of a greenhouse. This greenhouse effect also keeps the Earth warm enough to sustain life.
Explanation:
Answer:
greenhouse gases trap heat for the earth so if it was unavaible no heat would be conserved
Explanation:
How do you do problem bii??
Answer:
Explanation:
Trick question. The cathode is where the reduction reaction takes place. The reduction reaction is the gain of electrons.
Pb+2 + 2e^- ===> Pb The eo for that is - 0.126.
The minus sign indicates that the Pb^2+ is not overjoyed at taking on those two electrons. If it had a say in the matter, it would rather be giving up electrons. In other words, it would rather be the oxidizing equation which would look like this
Pb ===> Pb+2 + 2e^- and the oxidizing potential would be eo = + 0.126
That's what moving right and moving left means. If the eo is - then the preferred reaction is the opposite one.
This is a real language problem and if Znk answers you can take his answer to the bank.
Answer:
[tex]\boxed{\text{(b) (ii) 0.34 V}}[/tex]
Explanation:
If electrons flow from Pb to X through the external circuit, the Pb electrode must be the anode.
The standard reduction potential for Pb²⁺ is -0.126 V.
When we write the half-reaction for the oxidation, the standard oxidation potential for Pb must be 0.126 V.
The cell reactions are:
E°/V
Anode: Pb ⇌ Pb²⁺ + 2e⁻ 0.126
Cathode: X²⁺ + 2e⁻ ⟶ X x
Overall: Pb + X²⁺ ⟶ Pb²⁺ + X 0.47
0.126 + x = 0.47
x = 0.47 – 0.126 = 0.34 V
[tex]\text{The reaction at the X electrode is a reduction,}\\\text{so its standard reduction potential is }\boxed{\textbf{0.34 V}}[/tex]
Consider the unbalanced equation for the oxidation of butene.
C4H8 + 6O2 CO2 + H2O
For each molecule of C4H8 that reacts, how many molecules of carbon dioxide and water are produced?
Answer:
B- 4 molecules carbon dioxide 4 molecules water
Explanation:
Just took this on edg.
What is the molarity of sodium chloride in a solution containing 0.50 mol of sodium chloride in 500 ml of water?
Answer:
The molarity of the solution is 1.0 MExplanation:
1) Data:
a) n = 0.50 mol
b) V = 500 ml
c) M = ?
2) Formula:
Molarity, M = number of moles of solute / volume of solution in litersM = n / V (liter)
3) Conversion of units:
500 ml × 1.00 liter / 1,000 ml = 0.500 liter4) Solution:
Substitute in the formula:
M = n / V (liter) = 0.50 mol / 0.500 liter = 1.0 mol / liter = 1.0 MThe answer must be reported with two significant figures.
The molarity of the sodium chloride solution is 1.0 M. The molarity is 1.0 M because 0.50 moles of NaCl is dissolved in 0.50 liters of solution, resulting in 1.0 M.
To calculate the molarity of the solution, we use the formula:
[tex]\[ \text{Molarity (M)} = \frac{\text{Number of moles of solute (n)}}{\text{Volume of solution (V) in liters}} \][/tex]
Given that we have 0.50 moles of sodium chloride (NaCl) and the volume of the solution is 500 ml (which is equivalent to 0.5 liters), we can plug these values into the formula:
[tex]\[ \text{Molarity (M)} = \frac{0.50 \text{ mol}}{0.50 \text{ L}} \][/tex]
[tex]\[ \text{Molarity (M)} = 1.0 \text{ M} \][/tex]
Therefore, the molarity of the sodium chloride solution is 1.0 M.
A compound is composed of 85.64% carbon and 14.36% hydrogen. The compound has a formula mass of 42.08 grams. What is the molecular formula?
Answer:
The molecular formula is C₃H₆Explanation:
1) Assume 100 g of substace:
Carbon, C: 85.64% × 100 g = 85.64 gHydrogen, H: 14.36% × 100 g = 14.36 g2) Convert the masses in grams to number of moles
moles = mass in grams / atomic massatomic mass of C: 12.011 g/molatomic mass of H: 1.008 g/molCalculations:
C: 85.64 g / 12.011 g/mol = 7.130 molH: 14.36 g / 1.008 g/mol = 14.25 mol3) State the ratio of moles.
Divide the number of moles of each element by the least number of moles:
C: 7.130 mol / 7.130 mol = 1.0 molH: 14.25 mol / 7.130 mol = 2.0 mol4) Set the empirical formula:
CH₂5) Calculate the mass of one mol of the empirical formula:
CH₂: 12.011 g/mol + 2× 1.088 g/mol = 14.027 g/mol6) Calculate how many times the mass of the empirical formula is contained in the mass of the molecular formula:
42.08 g / 14.027 g = 2.9999 = 37) Set the molecular formula:
Multiply each subscript of the empirical formula by the previos ratio: 3
C: 1 × 3 = 3H: 2 × 3 = 6Conclusion: the molecular formula is C₃H₆
Answer:
C₃H₆
Explanation:
Classify each statement about catalysts as true or false.
Catalyst lower activation energy
Catalyst are consumed by the overall reaction
Catalyst speed up chemical reaction
Answer:
Catalyst lower activation energy: TRUECatalyst are consumed by the overall reaction: FALSECatalyst speed up chemical reaction: TRUEExplanation:
Chemical reactions follow a path: reactants increase their chemical energies, form activated complexes (transition compounds) until reaching the activation energy, from which the final products are formed.
Catalysts are substances that can change the path of the reactions by lowering the activation energy (first statement is true) and, consequently, speeding up the reaction (third statement is true).
The activation energy is the minimum amount of energy required for the reactants to form the activated complex. So, catalysts, by providing a new path, where the activation energy is lower, manage to incrase the rate of the reaction.
But catalysts, although intervene in the reaction by modifying the way the reactants will react, do not form part of the reactants nor products, so they are not consumed by the overall reaction (second statement is false).
In chemistry, catalysts lower the activation energy thus speeding up chemical reactions, but they are not consumed by the reaction.
Explanation:The first statement, Catalysts lower activation energy, is true. Catalysts work by providing an alternative reaction pathway with a lower activation energy. This allows the reaction to proceed more rapidly.
The second statement, Catalysts are consumed by the overall reaction, is false. One of the key characteristics of a catalyst is that it is not consumed in the reaction. While it may temporarily bond with reactants during the process, it is released and available to participate in subsequent reactions.
The third statement, Catalysts speed up chemical reaction, is true. By lowering the activation energy, catalysts allows the reaction to occur at a faster rate.
Learn more about Catalysts here:https://brainly.com/question/35451277
#SPJ6
In the process of nuclear fission,1(_____).Fission only happens to very 2(_____) atoms.The Fission process usually also produces several free 3(_____)
1 .one atom splits into two,two atoms combine into one
2.large,small
3.electrons,hydrogen atoms,neutrons
Answer:
1. One atom splits
2. large
3. neutrons
Explanation:
In the process of nuclear fission,1__one atom splits___.Fission only happens to very 2(__large___) atoms.The Fission process usually also produces several free 3(__neutrons___).
Nuclear fission is a radioactive decay process in which heavy and unstable radioactive nucleus decays into lighter ones with the release of energy and free neutrons.
Fission differs from fusion in that in nuclear fusion, two light atoms comes together to form a large one. This process releases a very great amount of energy.
Answer: 1. One atom splits into two, 2. Large 3. Neutrons
Explanation:
Both fructose and glucose have an empirical formula of CH2O and a molecular mass of 180.15948 g/mol. Determine the molecular formula.
A)
CH2O
B)
C3H8O3
C)
C6H12O6
D)
C8H16O8
Answer:
C) C₆H₁₂O₆.
Explanation:
We can determine the molecular formula by calculating the molecular mass of different choices.Molecular mass = ∑(no. of atoms * atomic mass).
A) CH₂O:
molecular mass = atomic mass of C + 2*atomic mass of H + atomic mass of O = (12.0 g/mol) + (2 * 1.0 g/mol) + (16.0 g/mol) = 30.0 g/mol.
B) C₃H₈O₃:
molecular mass = 3(atomic mass of C) + 8(atomic mass of H) + 3(atomic mass of O) = 3(12.0 g/mol) + 8(1.0 g/mol) + 3(16.0 g/mol) = 92.0 g/mol.
C) C₆H₁₂O₆:
molecular mass = 6(atomic mass of C) + 12(atomic mass of H) + 6(atomic mass of O) = 6(12.0 g/mol) + 12(1.0 g/mol) + 6(16.0 g/mol) = 180.0 g/mol.
D) C₈H₁₆O₈:
molecular mass = 8(atomic mass of C) + 16(atomic mass of H) + 8(atomic mass of O) = 8(12.0 g/mol) + 16(1.0 g/mol) + 8(16.0 g/mol) = 240.0 g/mol.
So, the right choice is: C) C₆H₁₂O₆.
The molecular formula of the compound is the C₆H₁₂O₆. The correct option is C.
The empirical formula of the fructose and the glucose = CH₂O
The molecular mass of the compound = 180.15948 g/mol
The empirical formula mass of the molecule, CH₂O = 12 + 2(1) + 16 = 30 g/mol
The number of empirical formula units = 180.15948 g/mol / 30 g/mol
The number of empirical formula units = 6
The molecular formula of the compound = 6( CH₂O)
The molecular formula of the compound = C₆H₁₂O₆
Therefore, the molecular formula of the compound is C₆H₁₂O₆. The option C is correct.
To learn more about molecular formula here
https://brainly.com/question/491767
#SPJ6
What do coefficients represent in a balanced equation?
Answer:
relative numbers of each molecule or formula unit
can i get brainliest
Explanation:
Oxygen will have a positive oxidation number when combined with
Oxygen has a positive oxidation number when combined with fluorine, the most electronegative element, which always has an oxidation number of -1. This is an exception to oxygen's usual -2 oxidation state.
Explanation:Oxygen will have a positive oxidation number when combined with fluorine. This is because fluorine is more electronegative than oxygen, which is typically seen with an oxidation number of -2, except in this special case as well as in peroxides where it has an oxidation number of -1. Fluorine, the most electronegative element, always has an oxidation number of -1, and it is the only element with which oxygen can have a positive oxidation number.
For example, in compounds like dioxygen difluoride (O2F2), oxygen has a positive oxidation state. This is an exceptional situation, as oxygen usually exhibits a negative oxidation state due to its high electronegativity, only surpassed by fluorine. Remember, the sum of oxidation numbers in a compound must balance out to zero, or the charge of the ion if it is a polyatomic ion.
Which BEST describes the illustration below?
A pure substance made of a compound
A pure substance made of an element
A mixture made up of different compounds
A mixture made up of different elements
The best description of the illustration is option C. A mixture made up of different compounds.
The illustration appears to be a mixture made up of different compounds. It contains several distinct shapes, including triangles and circles, which could represent different types of molecules.
Additionally, the colors of the shapes vary, suggesting that they are composed of different elements.
However, based on the visual evidence, it is most likely a mixture of multiple compounds.
Therefore, option C, "A mixture made up of different compounds" is the best description of the illustration.
The correct option is c. A mixture made up of different compounds.
To best describe the illustration, one must understand the definitions of the terms involved:
A pure substance is a form of matter that has a constant composition and distinct properties. It cannot be separated into other kinds of matter by physical methods. Pure substances can be either elements or compounds.
An element is a pure substance that consists of a single type of atom and cannot be broken down into simpler substances by chemical means.
A compound is a pure substance composed of two or more elements in a specific ratio and structure, forming a molecule with distinct chemical properties.
A mixture is a combination of two or more different substances (either elements or compounds) that are not chemically bonded and can be present in varying proportions. Mixtures can be either homogeneous (uniform composition throughout) or heterogeneous (non-uniform composition).
Given that the illustration depicts a mixture, it means that the components are not chemically bonded and can vary in proportion. If the mixture is made up of different compounds, it implies that there are multiple substances, each with its own unique chemical composition, mixed together but not reacting to form a new substance. This is consistent with the definition of a mixture made up of different compounds.
What effect does the concentration of reactants have on the rate of a reaction apex?
Concentration of reactant mostly accelerates the rate of a reaction(at a higher concentration, reactants collide more often).
Explanation:
When there is more concentration of reactants then it means there are more number of molecules. Hence, then there will be more number of collisions taking place in the chemical reaction.
As a result, rate of reaction will increase with increase in concentration.
On the other hand, when there is decrease in concentration of reactants then it means less number of reactant molecules are taking part in the chemical reaction.
Hence, there will be less number of collisions between the molecules due to which there will be decrease in the rate of reaction.
19. Kepler's laws follow which law discovered by Sir Isaac Newton? A. Universal Law of Force B. Universal Gravitational Law C. Universal Laws of Attraction D. Universal Law of Friction so am thinking b is right answer >?
You are right the answer is B.
Universal Gravitational Law
Why is it that the boiling temperature of the water is lower at high elevations than at sea level because the atmospheric pressure is lower at high elevation than at sea level? Can someone explain the chemistry behind this?
Answer:
Explanation:
At high elevations the atmospheric pressure is lower. That means that slower moving molecules of water at the surface meet with less resistance from the atmospheric pressure. So the water begins to escape with less energy needed. The boiling point goes from 100 at sea level to about 93 degrees about 6000 feet up.
How many valence electrons do alkaline earth metals have
Answer:
The alkaline earth metals have 2 valence electrons.Explanation:
Alkaline earth metals are the family of metals that belong to group (column) number 2 in the periodic table.
You can tell the number of valence electrons of the representative elements by the number of column: the ones digit is the number of valence electrons.
This is how this works:
Column number ones digit number of valence electrons
1 1 1 (alkali metals)
2 2 2 (alkaline earth metals)
13 3 3
14 4 4
15 5 5
16 6 6
17 7 7 (halogens)
18 8 8 (noble gases).
Of course, this is consequence of the electron configurations.
The electron configuration of the alkaline metals ends in ns², whrere n is the main energy level (principal quantum number), and the superscript 2 is the number of electrons in that level, so the number of valence electrons is 2.Alkaline earth metals, such as Beryllium and Magnesium, found in group 2 of the periodic table, have two valence electrons that are responsible for bonding.
Explanation:Alkaline earth metals, which are found in the second group of the periodic table, have two valence electrons. Valence electrons are the electrons in the outermost shell of an atom and participate in forming chemical bonds. Examples of alkaline earth metals are Beryllium (Be), Magnesium (Mg), Calcium (Ca), and Barium (Ba), among others. In all of these cases, they have two electrons in their outer shell, which makes them alkaline earth metals.
For instance, Beryllium (Be) is an alkaline earth metal and it is in the second column (group 2) of the periodic table, this means it has two electrons in its outer shell. These valence electrons are the ones available for bonding with other atoms.
Learn more about Alkaline Earth Metals here:https://brainly.com/question/31653688
#SPJ11
Why is thermal energy produced not generally usable to do work? A. Because the thermal energy dissipates too quickly and is not concentrated enough to be used B. Because this energy is lost to the universe C. Because thermal energy is a form of energy that cannot be used to do any work D. Because thermal energy does not have the same equivalent to do work as other forms
Answer:
A sounds like the best answer to me because thermal energy can cool very quickly if its hot
Explanation:
Answer: Option a
Explanation: Thermal energy can be defined as using heat as a form of energy for doing work. It can be used for various processes.
But there is a problem associated with this energy, that is the thermal energy dessipiates very fastly and so it cannot be used as a form of energy for doing work.
It cools down very fastly and so it cannot be used as a source.
Neils Bohr published his model of the atomic structure in 1913. He introduced the theory of electrons traveling in orbits around the atom's nucleus, with electrons orbiting only in certain orbits called shells. Each shell can contain a fixed number of electrons.
According to this model of the atom, the chemical properties of an element are mainly determined by
A)
the number of electrons in the outer shells.
B)
the number of electrons in the inner shells.
C)
the total number of electrons in all shells.
D)
the difference between number of electrons and protons.
Elim
Answer:
A) the number of electrons in the outer shells.
Explanation:
The Bohr's model of the atoms shows that electrons orbits the nucleus in energy levels that are discrete and quantised. Orbital electrons are pulled by the nucleus. The nuclear pull is strongest on the shells closer to the nucleus and weakest as we reach the outermost sphere.
From this model, we see that chemical properties are governed by how much electrons an atom is ready to lose from its outermost shell in which the energy is the lowest. It is the electrons in the outermost shell or valence shell that determines how atoms would behave chemically.
Answer:
A
Explanation:
What can acid rain do to buildings and statues
The chemicals that acid rain contains can have damaging effects on objects like buildings, monuments, statues, and cars.
Its components can make paint to be peel, stone construction appears old, worn down which reduces the architectural value and beauty.
ExplanationDepending on how acidic the rain is, it can obliterate these constructions to a brutal degree.
First, components like sulfurous, sulfuric and nitric acids mix with air and rain. Then they react with calcite or calcium-based compounds in marble and limestone and dissolve calcite.
The dry depositions of acidic particles contribute severely to the corrosion of construction materials, building paints, stones like marble, limestones and various type of granites.
Acid rains aggravate the life value of buildings and architectural structures.
Which part of the hydrocarbon name tells you the amount of carbon in the molecule?
The leading numbers
Ending
The ending numbers
Prefix
Answer:
Prefix
Explanation:
Hydrocarbon are organic compounds that are made up of hydrogen atoms and carbon atoms.The root name of a hydrocarbon is based on whether the hydrocarbon form a chain or a ring.A prefix to the hydrocarbon name comes before the molecule and is based on the number of carbon atoms in the hydrocarbon. For example, a chain eight carbon atoms would be using prefix oct-.The prefix of the hydrocarbon name indicates the amount of carbon in the molecule, derived from the longest continuous carbon chain within the compound, according to IUPAC nomenclature.
The part of the hydrocarbon name that tells you the amount of carbon in the molecule is the prefix. The prefix is determined by the number of carbon atoms in the longest continuous carbon chain. For example, the prefix for a hydrocarbon with three carbon atoms would be 'prop' and the full name for an alkane with this number of carbons would be propane. This naming system is part of the International Union of Pure and Applied Chemistry (IUPAC) rules for nomenclature, which provides a systematic way to name hydrocarbons and other organic compounds.
Hydrocarbon compounds with different numbers of carbon atoms use specific numerical prefixes such as 'meth-' for one carbon, 'eth-' for two, 'prop-' for three, up to 'dec-' for ten, and beyond. The ending of the hydrocarbon name, such as '-ane', '-ene', or '-ol', indicates the type of hydrocarbon or functional group but does not tell you about the number of carbon atoms.
An ethylene gas torch requires 3200 L of gas at 3.00 atm What will be the pressure of the gas if ethylene is supplied by a 250.0 L tank?
Answer:
38.4L
Explanation:
Given parameters of the ethylene gas:
Initial Volume V₁ = 3200L
Initial pressure P₁ = 3atm
Final Volume V₂ = 250L
Final pressure P₂ = ?
We need information about the unknown final pressure.
Based on the given parameters, we can apply Boyle's law. The law states that "the volume of a fixed mass of a gas is inversely proportional as the pressure changes if temperature is constant".
NB: We assume that the torch provides a constant source of heat.
The law is expressed mathematically as:
P₁V₁ = P₂V₂
Making the unknown P₂ the subject of the equation gives:
P₂ = P₁V₁ / V₂
P₂ = 3200x3/250
P₂ = 9600/250
P₂ = 38.4L
Pressure of the gas = 38.4L
Using Boyle's Law, we determined that the pressure of ethylene gas will be 38.4 atm when transferred from 3200 L at 3.00 atm to a 250.0 L tank.
To determine the final pressure of the ethylene gas when transferred into a different volume, we can use Boyle's Law.
Boyle's Law states that for a given mass of gas at constant temperature, the volume of the gas is inversely proportional to the pressure of the gas.Boyle's Law Formula
The formula used is :P₁V₁ = P₂V₂
Where:
P₁ = initial pressure (3.00 atm)V₁ = initial volume (3200 L)P₂ = final pressure (to be determined)V₂ = final volume (250.0 L)Rearranging the formula to solve for P₂ :
P₂ = [tex]\frac{P_{1} V_{1} }{V_{2} }[/tex]
Substituting in the given values:P₂ = [tex]\frac{3.00\times 3200 }{250.0}[/tex]P₂ = [tex]\frac{9600}{250.0}[/tex]P₂ = 38.4 atmTherefore, the pressure of the gas in the 250.0 L tank will be 38.4 atm.
Based on the equation, how many grams of Br2 are required to react completely with 36.2 grams of AlCl3?
AlCl3 + Br2 → AlBr3 + Cl2
Answer:
65.08 g.
Explanation:
For the reaction, the balanced equation is:2AlCl₃ + 3Br₂ → 2AlBr₃ + 3Cl₂,
2.0 mole of AlCl₃ reacts with 3.0 mole of Br₂ to produce 2.0 mole of AlBr₃ and 3.0 mole of Cl₂.
Firstly, we need to calculate the no. of moles of 36.2 grams of AlCl₃:n = mass/molar mass = (36.2 g)/(133.34 g/mol) = 0.2715 mol.
Using cross multiplication:
2.0 mole of AlCl₃ reacts with → 3.0 mole of Br₂, from the stichiometry.
0.2715 mol of AlCl₃ reacts with → ??? mole of Br₂.
∴ The no. of moles of Br₂ reacts completely with 0.2715 mol (36.2 g) of AlCl₃ = (0.2715 mol)(3.0 mole)/(2.0 mole) = 0.4072 mol.
∴ The mass of Br₂ reacts completely with 0.2715 mol (36.2 g) of AlCl₃ = no. of moles of Br₂ x molar mass = (0.4072 mol)(159.808 g/mol ) = 65.08 g.
Answer: 65.2 grams
Explanation:
7 In order to determine the identity of a substance, a student listed the
following properties. Which of the following is a chemical property?
A Oxidizes in air
B Conducts an electric current
C Attraction to a magnet
D Dissolves in water
Answer:
A Oxidizes in air
Explanation:
The chemical properties are those properties that tells us what a substance does as regards to wether it reacts with other substances or not. Most chemical properits of matter signifies a change in their chemical make up.
When a matter oxidizes in air, it depicts its chemical property. It tells us how in the presence of air such a substance would interact. Not all matter oxidizes in air.
Other chemical properties are flammability, rusting of iron, precipitation, decomposition of wate by electric current.
Answer:
d.
Explanation:
2Al + 6HCl ? 2AlCl3 + 3H2 If the chemical reaction produces 129 grams of AlCl3, how many grams of H2 are also produced?
Answer:B 2.92
Explanation: its correct my guy
Answer:
2.83848 grams of [tex]H_{2}[/tex] are produced
Explanation:
Assuming that the reaccions continues until the total consumption of the reagents, it is possible to establish:
1 mol Al = 1 mol [tex]AlCl_{3}[/tex]
2 mol [tex]AlCl_{3}[/tex] = 3 mol [tex]H_{2}[/tex]
Then, by looking at the periodic table, it is possible to know the molar wheigt of the compounds:
1 mol Al = 29.9815 gr
1 mol [tex]H_{2}[/tex] = 2 gr
1 mol [tex]AlCl_{3}[/tex] = 136.3405 gr
Reeplacing the moles with the respectly wheights of compounds:
29.9815 gr Al = 136.3405 gr [tex]AlCl_{3}[/tex]
X gr Al = 129 gr [tex]AlCl_{3}[/tex]
So, 129 grams of [tex]AlCl_{3}[/tex] equals to 28.3673 grams of Al.
Then, following the same line of thought:
29.963 gr Al (2 moles) = 6 gr [tex]H_{2}[/tex] (3 moles)
28.3673 gr Al = Y gr [tex]H_{2}[/tex]
So, 28.3673 grams of Al equals to 2.8384 grams of [tex]H_{2}[/tex].
When 0.5 g of powdered iron (III) oxide was added to 100 cm3 of hydrogen peroxide, water and oxygen were produced. Iron (III) oxide was not used up in the reaction. Based on the information, which of the following is likely to increase the rate formation of the products? Replacing the powdered iron oxide with its cubical crystals Using 150 cm3 of hydrogen peroxide Removing iron oxide from the reaction mixture Using 1.0 gram of iron oxide
Answer:
Using 1.0 gram of iron oxide.
Explanation:
Rate of the reaction depends on many factors:The concentration of the reactants.
The surface area of the reactants or catalyst.
The amount of the catalyst.
Hydrogen peroxide is the reactant and iron (III) oxide is the catalyst.
If we display the various choices:Replacing the powdered iron oxide with its cubical crystals:
This will decrease the surface area of the catalyst exposed to the solution, so the rate formation of the products will decrease.
Using 150 cm³ of hydrogen peroxide:
The volume of the reactant does not affect the concentration of the reactants, so changing the volume has no effect on the rate formation of the products.
Removing iron oxide from the reaction mixture:
Removing the catalyst will decrease (may stop) the rate formation of the products.
Using 1.0 gram of iron oxide:
This will increase the amount of the catalyst used, and so it will increase the rate formation of the products.
So, the right choice is:
the rate formation of the products
Which pair of elements would most likely bond to form a covalently bonded compound?
Two non-metals pair of elements would most likely bond to form a covalently bonded compound.
What is an element?
It is defined as a substance which cannot be broken down further into any other substance. Each element is made up of its own type of atom. Due to this reason all elements are different from one another.
Elements can be classified as metals and non-metals. Metals are shiny and conduct electricity and are all solids at room temperature except mercury. Non-metals do not conduct electricity and are mostly gases at room temperature except carbon and sulfur.
The number of protons in the nucleus is the defining property of an element and is related to the atomic number.All atoms with same atomic number are atoms of same element.Elements combine to form compounds.
Learn more about element,here:
https://brainly.com/question/14347616
#SPJ5
Elements that are likely to form a covalent bond are typically nonmetals with similar electronegativity values, which leads to the sharing of electrons, as exemplified by the bonding of hydrogen and oxygen to form water (H₂O).
The question 'Which pair of elements would most likely bond to form a covalently bonded compound?' falls under the subject of Chemistry. When determining whether a pair of elements will likely form a covalent bond, we consider their electronegativity. Covalent bonds generally occur between nonmetallic elements that have similar electronegativity values, meaning they have a comparable ability to attract electrons.
For example, hydrogen (H) and oxygen (O) are both nonmetals and form a covalent bond to create water (H₂O). Another pair of elements that commonly form a covalent bond is nitrogen (N) and hydrogen (H), which combine to form ammonia (NH₃). These elements do not have markedly different electronegativities, which favors the sharing of electrons rather than the transfer of electrons which is characteristic of ionic bonding.
On the other hand, metals and nonmetals such as sodium (Na) and chlorine (Cl) tend to form ionic bonds, where electrons are transferred from one atom to another, due to their large difference in electronegativities.
I need help with this question I don’t understand it at all!!!
Answer:
C-14 => N-14 + β⁻
Explanation:
C-14 over time decays by beta emission to N-14. Before decay, C-14 nucleus contains 6 protons and 8 neutrons. It is accepted that a neutron (n°) is composed of 1 proton (p⁺) and 1 electron (e⁻). Beta emission indicates loss/discharge of a high energy e⁻ from the nucleus of C-14 leaving 7 protons and 7 neutrons. The number of protons defines the element, N-14 as a product of the decay process with the β particle (high energy electron) the other. To check, remember, the ∑mass Reactants = ∑mass Products (superscript numbers) and ∑reactant charges = ∑product charges (subscript numbers
₆C¹⁴ => ₇N¹⁴ + ₋₁e° or, C-14 => N-14 + β
A solution of benzene in methanol has a transmittance of 28% in a 1.00 cm cell at a wavelength of 254 nm. only the benzene absorbs light at this wavelength, not the methanol. what will the solution's transmittance become (in the same 1.00 cm cell) if the original benzene solution is diluted 10-fold with methanol?
Answer:
[tex]\boxed{88 \%}[/tex]
Explanation:
[tex]A = \epsilon cl\\A = -\log T\\\epsilon cl = -\log T[/tex]
ε and l are constants.
If there are two different concentrations of benzene,
[tex]\dfrac{c_{2}}{c_{1}} = \dfrac{\log T_{2}}{\log T_{1}}[/tex]
Data:
c₁ = c₁; c₂ = 0.1c₁;
T₁ = 0.28: T₂ = ?
Calculation:
[tex]\dfrac{0.10c_{1}}{c_{1}} = \dfrac{\log T_{2}}{\log 0.28}\\\\\log T_{2}= 0.10 \times \log0.28 = -0.0553\\\\T_{2} = 10^{-0.0553} = 0.88 \\\\\boxed{T_{2} = \textbf{88 \%}}[/tex]
Which has the higher boiling point, C3H8 or C8H10? Explain your reasoning.
Answer:C8H10
Explanation:
The greater the number of carbon molecules in the atom, the greater the boiling point
What is the maximum volume of 0.10 m naoh that can be completely neutralized by 25 milliliters of 0.20 m hcl?
Answer:
50. mL
Explanation: