Final answer:
The triple point on a phase diagram represents the only combination of temperature and pressure at which all three phases can exist simultaneously and are in equilibrium.
Explanation:
The triple point on a phase diagram refers to the point where the solid/liquid, liquid/gas, and solid/gas lines intersect. It represents the only combination of temperature and pressure at which all three phases can exist simultaneously and are in equilibrium. An example is the triple point of water, which occurs at 273.16 K (0.01°C). At this point, water can exist simultaneously as solid ice, liquid water, and water vapor.
how many moles of sulfur will be needed to oxidize 3 moles of zinc to zinc sulfide
Final answer:
To oxidize 3 moles of zinc to zinc sulfide, 3 moles of sulfur are needed based on the 1:1 molar ratio of the balanced chemical equation Zn + S → ZnS.
Explanation:
The question, 'how many moles of sulfur will be needed to oxidize 3 moles of zinc to zinc sulfide?' involves a stoichiometric calculation based on a balanced chemical reaction. The reaction between zinc (Zn) and sulfur (S) to form zinc sulfide (ZnS) is represented by the balanced equation:
Zn + S → ZnS
According to the equation, the molar ratio of zinc to sulfur is 1:1. This means that for every mole of zinc, one mole of sulfur is required. Therefore, to oxidize 3 moles of zinc, 3 moles of sulfur will be needed to produce zinc sulfide (ZnS).
MgCl2 + Na2O Nog+2NaC what type of chemical reaction is this
MgCl₂ +Na₂O →MgO + 2NaCl
the type of reaction above is double replacement reaction
explanation
Double replacement reaction is type of chemical reaction in which two compound react where positive ion (cation) and negative ion (anion) switch places forming two new compounds.
in reaction above the new compounds formed is MgO and NaCl as Mg²⁺ and O²⁻ switch their place to form MgO , while Na⁺ and Cl⁻ switch their place to form NaCl
What is true about all the elements in the same column of the periodic table
Each column is called a group.
The elements in each group have the same number of electrons in the outer orbital
The columns each one in the periodic table is called groups. The elements in each group contains the same number of electrons in the outer orbital.
for example, every element in the first column has one electron in its outer shell. In the second column,two electrons in outer shell.
How does the scientific method help scientists?
The scientific method is a sequential process that uses predictions from hypotheses to derive observations and conclusions. It helps scientists to collect empirical evidence to prove the theory.
What is the scientific method?The scientific method has been defined as an empirical approach to using acquired knowledge to draw observations and conclusions from the hypothesis. It helps scientists to answer questions by performing research and experiment.
It allows the establishment of a hypothesis that can be proved true or false by conducting experiments and making observations based on analysis.
The observation allows the findings to be concluded. The data can be interrupted by scientists to conclude their research study with credibility.
Therefore, scientific methods are useful for scientists.
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under which conditions of temperature and pressure does oxygen gas behave least like an ideal gas
low temperature and high pressure so oxygen gas behave least like an ideal gas
Answer:High temperature and low pressure.
Explanation:
The ideal gas equation presupposes that the molecules of a gas are at infinite distances from each other hence they do not interact at all. This condition can only be satisfied at very high temperature and low pressure. At high temperature, the average kinetic energy of gas molecules is maximum hence they can move apart at great distances from each other. At low pressure, the gasses are relatively free from any kind of intermolecular forces. Hence oxygen will behave as an ideal gas at high temperature and low pressure.
Which acid was most likely used for the titration graph below.
Answer: HCOOH OR METHANOIC ACID
Explanation:
The titration graph displays the running of alkali or base into an acid. The start of the graph displays a rapid or quick rise in pH but this slows down as a buffer solution contains HCOOH and the unknown base or alkali are produced.
Although burning waste is one way to reduce garbage that goes into landfills, it has negative enviromental consequences. Which of the following is a possible negative consequence of burning waste
What are the options you have?
Balance the reaction which forms ions. Choose "blank" if no coefficient other than 1 is needed.
Ba(NO3)2 ---> ___ Ba+2 + ___ NO3-
when one mole of barium nitrate dissociates into ions it forms 1 mole of Ba2+ and 2 moles of NO3-. The balanced equation is ,
[tex]Ba(No_{3} )_{2}[/tex]→[tex]1Ba^{2+} +2NO_{3} ^{-1}[/tex]
Answer: The chemical equation is given below.
Explanation:
We are given a equation that represents ionization of barium nitrate salt.
Ionization reaction is defined as the reaction in which a salt breaks into its respective ions. The chemical equation for the ionization of barium nitrate is given as:
[tex]Ba(NO_3)_2\rightarrow Ba^{+2}+2NO_3^-[/tex]
By Stoichiometry of the reaction:
1 mole of barium nitrate ionizes to produce 1 mole of barium ions and 2 moles of nitrate ions.
Hence, the chemical equation is given above.
Which type of telescope would perform better on a mountaintop than at a lower elevation?
when an optical telescope located on the ground is used to view the sky the image has to surpass through the earth's atmosphere which is polluted. so the resolution wont be clear. When viewed on a mountain top both optical and infrared telescopes would perform better as the air above the atmosphere is less depth and cleaner.
what kind of mixture is shaving cream
A 20 L cylinder of gas at 5.6 atm pressure at 35 degrees Celsius is heated to 95 degree Celsius and compared to 23 atm. What is the new volume?
Answer:
5.8 L
Step-by-step explanation:
This looks like a case where we can use the Combined Gas Law to calculate the temperature.
p₁V₁/T₁ = p₂V₂/T₂ Multiply both sides by T₂
p₁V₁T₂/T₁ = p₂V₂ Divide each side by V₂
V₂ = V₁ × p₁/p₂ × T₂/T₁
=====
Data:
p₁ = 5.6 atm
V₁ = 20 L
T₁ = 35 °C = 308.15 K
p₂ = 23 atm
V₂ = ?
T₂ = 95 °C = 368.15 K
=====
Calculation:
V₂ = 20 × 5.6/23 × 368.15/308.15
V₂ = 20 × 0.243 × 1.19
V₂ = 5.8 L
a certain skin lotion is a fine mixture of water and various oils. this lotion is cloudy and cannot be separated into oil and water by filtration. moreover, it’s compon do not separate when left standing. what type of mixture is it?
Answer: The skin lotion is a colloidal mixture of water and various oils.
Explanation:
Mixture: Blend of of two or more components which are chemically unreactive to give any product.
Mixture are defined as of three types:
Solutions : Mixture in which one component is completely distributed in an other component resulting in clear mixture. They cannot be separated into its components on standing or by filtration.
Suspensions: Mixture in which one component is not completely or uniformly distributed in another component.They separate out into layers when kept undisturbed.
Colloids: Mixture in which one component is uniformly distributed in another component but the mixture formed is not clear. The color of mixture appears turbid or cloudy. They cannot get separated by filtration. They also cannot get separated into its components when left standing.
A skin lotion is a fine mixture of water and oils. it is a cloudy mixture and cannot be separated with help of filtration. Also its components also not separates out on standing. All these properties shown by skin lotion is of colloidal mixture.
the amount of work done depends on the amount of force applied and the distance the distance the object moves.
a. true
b. false
Answer:
True
Explanation:
How much force is applied & how far the force causes the object to move
Which statement has an inference mixed in?
A. The cells were rectangular and packed tightly together
B. The cells were no longer rectangular
C. They must have burst when they were microwaved
D. In the pond water, there was a small organism moving around very quickly
E. There was a white or clear dot inside most of the purplish cells of the red onion
C is an inference. The phrase "they must have" shows that someone tied information together to form a conclusion.
How many significant figures are in 1.009 L
The symbol for the hydroxide ion is _____. H + H 3 O - H(OH) OH -
Answer: OH-
Explanation:
The awnser is OH- trust me. I learned it in school.
According to the collision theory and model created to explain the collision theory, what is the best explanation for why a higher temperature makes a reaction go faster?
1. there are more collisions per miute
2. it increases the distance between the particles
3. it increases the average kinetic energy of the particles
4. it increases the average kinetic energy and there are more collisions per minute
Answer is: 4. it increases the average kinetic energy and there are more collisions per minute.
The average kinetic energy of molecules depends on the temperature.
As temperature increases, molecules gain more energy from surrounding and move faster and have more collisions.
Kinetic energy (standard unit is the joule J) depends on speed of the molecule.
The collision theory states that when suitable particles of the reactant hit each other, only a certain fraction of the collisions cause any noticeable or significant chemical change. These successful changes are called successful collisions.
Treating one coworker better than others is called vertical relationship. favoritism. harmony. socializing.
This is case of favoritism
vertical relationship is the relationship in a hierarchy, like up down relation
harmony: working in accordance with each other
Socializing: making social relationships with each other
which two subatomic particles make up the atomic mass
Hello.
The answer is: protons and nutrons
Have a nice day
which equation represents alpha decay
As stated by Charles’s Law, what is the relationship between temperature and volume when pressure remains constant
This laws states,
The volume of a given gas which is held at constant pressure is directly proportional to temperature. which means, as volume increases temperature also increases.[tex]V\alpha T\\\frac{V}{T} =C\\\frac{V_{1} }{T_{1} } =\frac{V_{2} }{T_{2} }[/tex]
Volume in litres or mL
Temperature in Kelvin.
Charles's Law states that the volume of a gas is directly proportional to its temperature in Kelvins, provided that the pressure and the amount of gas remain constant.
In the field of Chemistry, Charles's Law is a principle that describes the direct proportionality between the volume and temperature of a gas at constant pressure. This law was articulated by French Scientist Jacques Charles around 1787 and was later published by Joseph Louis Gay-Lussac.
According to Charles's Law, as the temperature of a gas increases, so does its volume, and conversely, as the temperature decreases, the volume decreases. This relationship holds true as long as the amount of gas and the pressure remain constant.
It is crucial to note that temperature measurements must be made on the Kelvin scale when applying Charles's Law, because the Kelvin scale starts at absolute zero, which is the point at which there is no molecular motion. Therefore, the law can be expressed mathematically as V ∝ T, where V represents volume and T represents temperature in Kelvins.
To summarize, Charles's Law is an essential part of gas laws, which contributes significantly to our understanding of how gases behave under varying temperatures while the pressure is kept constant.
What is the mass of oxygen in 300 grams of carbonic acid (H2CO3)
The mass of oxygen in 300 grams of carbonic acid (H2CO3) can be determined by calculating the mass percent of oxygen, which is found to be 77.4%. Therefore, the mass of oxygen in 300 grams of carbonic acid is 232.2 grams.
Explanation:Calculating Mass of Oxygen in Carbonic AcidThe task is to find the mass of oxygen in 300 grams of carbonic acid (H2CO3). Carbonic acid consists of 2 hydrogen atoms, 1 carbon atom, and 3 oxygen atoms. The molar mass of carbonic acid is therefore 2(1.008 g/mol) + 12.01 g/mol + 3(16.00 g/mol) which equals 62.024 g/mol.
To find the mass percent of oxygen, we calculate the total mass of oxygen in one mole of carbonic acid, which is 3(16.00 g/mol) = 48.00 g/mol. The mass percent of oxygen is then (48.00 / 62.024) × 100 = 77.4%. Therefore, in 300 grams of carbonic acid, the mass of oxygen is 300 g × 0.774 = 232.2 grams.
By comparing the ratio of mass of oxygen to the total mass in carbonic acid, we were able to determine how much oxygen is present in a given mass of the compound. This process is a basic stoichiometry calculation commonly performed in chemistry.
Conditions for an experimental chemistry reaction require a temperature of 300 K. The temperature in the lab is 55°F. Which of the following must you do to meet the requirements? (°F= 9/5 (K - 273) + 32
A) Decrease the room temp by 33 F
B) increase the room temp by 26F
C) Increase the room temp by 18 K
D) decrease the room temp by 12 C
300 degrees Kelvin = 300 - 273 = 27 degrees Celsius.
So what you need to do is find out how many degrees Fahrenheit that is.
F = 9/5(27) + 32
F = 48.6 + 32
F = 80.6
You are at 55oF. You need to go from 55 to 80.6 or 25.6 degrees F.
Your closest answer is B. <<<<<< Answer
Answer:
B) increase the room temp by 26°F
Explanation:
From the given information:
Room temperature = 55 °F
Required temperature = 300 K
Conversion from K to °F:
[tex]F = 9/5(K-273) + 32\\\\For T = 300 K\\\\F = 9/5(300-273)+32 = 80.6F[/tex]
The required temperature in °F = 80.6°F
Therefore, the lab temperature must be increased by:
[tex](80.6-55)F = 25.6 F[/tex]
When I2 and FeCl2 are mixed together, iodine (I) cannot replace chlorine (Cl) in the compound because iodine is lower on the periodic table.
true/false
The given statement is True.
This is single replacement reaction.
As reactivity decreases down the group,
Iodine is less reactive than Chlorine.
And so Iodine cannot replace chlorine from FeCl2.
I2 + FeCl2 ---> no reaction (Iodine is less reactive than chlorine)
Answer:
yes the answer is true
Explanation:
Describe an ionic bond in terms of the atoms' electronegativity values and what has happened to the electrons involved in the bond.
An ionic bond forms between two atoms due to significant electronegativity difference. One atom loses electrons to become a cation while the other gains these electrons to become an anion. These oppositely charged ions attract each other to form the bond.
Explanation:An ionic bond is a type of chemical bond that forms between two atoms with significantly different electronegativity values. This difference causes one atom (usually a metal) to lose electrons, becoming a positively charged cation, while the other atom (usually a non-metal) gains these electrons, becoming a negatively charged anion. The attraction between these two opposite charges is what forms the ionic bond. For example, in sodium chloride (NaCl), sodium (Na) loses one electron to become Na+ and chlorine (Cl) gains this electron to become Cl-, forming an ionic bond.
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An ionic bond is formed by the transfer of electrons between atoms with significant differences in electronegativity, typically a metal and a non-metal.
This results in the formation of positively and negatively charged ions that are attracted to each other by electrostatic forces.
An example of this is the formation of sodium chloride (NaCl).An ionic bond is formed through the transfer of electrons from one atom to another. This usually occurs between a metal and a non-metal due to their significant difference in electronegativity. The metal atom, having lower electronegativity, loses one or more electrons to become a positively charged ion or cation. Conversely, the non-metal atom, with higher electronegativity, gains these electrons to form a negatively charged ion or anion. These oppositely charged ions are then attracted to each other by electrostatic forces, holding them together in a 3D crystal lattice structure.Example: In the formation of sodium chloride (NaCl), sodium (Na) loses one electron to become Na+, and chlorine (Cl) gains that electron to become Cl-.The resulting Na+ and Cl- ions are attracted to each other, forming a stable ionic compound.
Please help this is due today
Study the graph below to answer the question.
Reaction A is an exothermic process and reaction B is an endothermic process because
A.
the enthalpy change of reaction A is lower than that of reaction B.
B.
ΔH is positive for reaction A and ΔH is negative for reaction B.
C.
the energy of activation of reaction A is lower than that of reaction B.
D.
ΔH is negative for reaction A and ΔH is positive for reaction B.
Answer is: D. ΔH is negative for reaction A and ΔH is positive for reaction B.
There are two types of thermochemical reactions:
1) endothermic reaction (chemical reaction that absorbs more energy than it releases).
For example, ΔH(reaction) = 150 kJ/mol; this is endothermic reaction.
2) exothermic reaction (chemical reaction that releases more energy than it absorbs).
For example, ΔH(reaction) = -225 kJ/mol; this is exothermic reaction.
the change in enthalpy = the total bonding energy for the products of a reaction - the bonding energy of the reactants.
Im an experiment , the group that is exposed to the variable to be tested is called the ?
The correct answer is the experimental group.
A group in an experiment, which receives the variable being tested is known as an experimental group. One variable is being examined at a time. The experimental group is compared with a control group that does not get the test variable. In this manner, experimental groups are used to determine the answers in an experiment.
The experimental group is the group in an experiment that is exposed to the variable being tested. This group undergoes the experimental manipulation, while the control group does not. Any differences observed between the two could be attributed to the experimental manipulation.
Explanation:In a typical experimental design, the group that is exposed to the variable being tested is known as the experimental group. This group undergoes the experimental manipulation, whereas the counterpart, the control group, does not. Both of these groups are sent through all phases of the experiment. However, the experimental group experiences a different level of the independent variable due to the experimental manipulation.
For example, if a researcher were testing the effect of a new tutoring approach on student performance, the experimental group would receive this new method of tutoring, while the control group would continue with the traditional method. After a set period, the researcher would compare the performances, looking for differences that could be attributed to the new tutoring approach, i.e., the experimental manipulation.
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Which issue is a limitation of using synthetic polymers? Check all that apply.
As trash, synthetic polymers are not biodegradable.
Landfills can easily fill up with synthetic polymers.
Plastics can be made into many different products.
Recycling synthetic polymers is costly.
Synthetic polymer production is not expensive.
Synthetic polymers can be produced in big quantities.
Answer:
1,2,4
Explanation:
As trash, synthetic polymers are not biodegradable.
Landfills can easily fill up with synthetic polymers.
Recycling synthetic polymers is costly.
These are the correct ones not the ones the other dude said.
The main problems with synthetic polymers are that they aren't biodegradable, contributing to landfill issues, and recycling them can be quite expensive.
Explanation:The primary limitations of using synthetic polymers, such as plastics, are that they are not biodegradable, which can lead to accumulation in landfills, and recycling them can be costly. Synthetic polymers, while versatile in application, present serious issues when disposed of. Synthetic polymers do not easily decompose and can persist in the environment for many decades, greatly contributing to landfill overflow. Additionally, the process to recycle polymers is intricate, involving sorting, cleaning and melting materials to be reused. This tends to be expensive and often not economically viable at larger scales.
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what form of the ideal gas law would you use to calculate
the volume of a gas
[tex]V=\frac{nRT}{P} [/tex]
Ideal gas equation:-
[tex]PV=nRT[/tex]
Here, [tex]P[/tex] is the pressure, V is the volume, R is the gas constant, n is the number of moles, T is temperature.
So, from the above equation, the ideal gas law would you use to calculate the volume of a gas is as follows:-
[tex]V=\frac{nRT}{P} [/tex]
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If 7.99 moles of C5H12 reacts with excess O2, how many moles of CO2 will be produced in the following combustion reaction? C5H12 + 8O2 = 6H2O + 5CO2
According to stoichiometry and the balanced equation, 7.99 moles of C5H12 will produce 39.95 moles of CO2.
Explanation:The subject matter of this question is stoichiometry in chemistry. The balanced chemical equation in the question is C5H12 + 8O2 = 6H2O + 5CO2. Here, we can see that 1 mole of pentane (C5H12) reacts to form 5 moles of carbon dioxide (CO2). This is a 1:5 ratio. Therefore, if we have 7.99 moles of C5H12, we would expect to produce five times that amount of CO2 because of this 1:5 ratio. Consequently, 7.99 moles of C5H12 will form 7.99 * 5 = 39.95 moles of CO2.
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