Answer: a principle stating that if a constraint (such as a change in pressure, temperature, or concentration of a reactant) is applied to a system in equilibrium, the equilibrium will shift so as to tend to counteract the effect of the constrain
The suns mass is very small compared to earth true or false
In the following reaction, 2SO3 (g) ↔ 2SO2 (g) + O2 (g), removing O2 (g) would shift the reaction in which direction?
SELECT AN ANSWER
right - towards the products
left - towards the reactants
Answer:
right - towards the products.
Explanation:
Le Châtelier's principle states that when there is an dynamic equilibrium, and this equilibrium is disturbed by an external factor, the equilibrium will be shifted in the direction that can cancel the effect of the external factor to reattain the equilibrium.By removing oxygen from the reaction, this means that the concentration of the products is decreased.
To attain the equilibrium again, the reaction is shifted toward the products side.
So, the right choice is: right - towards the products.
when 3.18 mole of chlorine reacts with excess aluminum, how many mole of aluminum chloride are formed
The solution is included. If you wonder, n(x) means the number of moles of the substance x.
When 3.18 mole of chlorine reacts with excess aluminum, 2.12 mole of aluminum chloride are formed.
The question pertains to the stoichiometry of the reaction between aluminum (Al) and chlorine (Cl₂) to form aluminum chloride (AlCl₃). According to the balanced chemical equation, 2 Al (s) + 3 Cl₂ (g) → 2 AlCl₃ (s), it indicates that 3 moles of chlorine gas react with 2 moles of aluminum to produce 2 moles of aluminum chloride. Given that 3.18 moles of chlorine reacts with excess aluminum, it means we have more than enough aluminum to react with the provided chlorine. Therefore, leveraging the stoichiometric relationship from the balanced equation where 3 moles of Cl₂ yield 2 moles of AlCl₃, if we have 3.18 moles of Cl₂, we can calculate the moles of AlCl3 produced as follows: (2 moles AlCl₃ / 3 moles Cl₂) * 3.18 moles Cl₂ = 2.12 moles of AlCl₃.
a decrease in pressure has the greatest effect on a solution that contains.. ?
A gas in a liquid
Explanation;Pressure affects the solubility of gases. According to Henry's law, the solubility of a gas in a liquid is proportional to the partial pressure of the gas above the liquid at a given temperature, Therefore; For the solubility of gases in liquids, as pressure increases, solubility increases. Hence pressure will have a effect on a solution with a gas in liquid.Final answer:
A decrease in pressure has the greatest effect on solutions containing gases, as it causes a decrease in gas solubility, leading to the escape of gas from the solution, such as carbon dioxide bubbling from an opened soda can.
Explanation:
A decrease in pressure has the greatest effect on a solution that contains gases. This is because gases are highly responsive to changes in pressure, as described by gas laws. An increase in pressure leads to a decrease in gas volume, hence an increase in gas concentration in solution. When pressure is decreased, the reverse happens, and gas solubility decreases.
Consider opening a soda can; as the pressure above the liquid decreases, the carbon dioxide escapes due to the reduced solubility, causing bubbling. Therefore, solutions with dissolved gases, much like carbonated beverages, are the most affected by changes in pressure. This phenomenon is crucial in understanding the behavior of gas-liquid systems.
How did Mendeleev feel about Russian science education when he came back from Germany
As he began to teach inorganic chemistry, Mendeleev could not find a textbook that met his needs. Since he had already published a textbook on organic chemistry in 1861 that had been awarded the prestigious Demidov Prize, he set out to write another one. The result was Osnovy khimii (1868–71; The Principles of Chemistry), which became a classic, running through many editions and many translations. When Mendeleev began to compose the chapter on the halogen elements (chlorine and its analogs) at the end of the first volume, he compared the properties of this group of elements to those of the group of alkali metals such as sodium. Within these two groups of dissimilar elements, he discovered similarities in the progression of atomic weights, and he wondered if other groups of elements exhibited similar properties. After studying the alkaline earths, Mendeleev established that the order of atomic weights could be used not only to arrange the elements within each group but also to arrange the groups themselves. Thus, in his effort to make sense of the extensive knowledge that already existed of the chemical and physical properties of the chemical elements and their compounds, Mendeleev discovered the periodic law.
Dimitri Mendeleev was the most noted Russian chemist who gave the periodic table. He gave the periodic table based on the atomic numbers and how they characterized the physical and chemical properties of the elements.
What were the thoughts of Mendeleev?When he came back to his homeland he began teaching inorganic chemistry but was not able to find a suitable textbook according to his need. He thought of writing another book as he was already awarded the prestigious Demidov Prize.As the result, he published the Principles of chemistry which is the most noted work of his and was translated to many languages.When he was studying the alkali group metals then he discovered that the properties according to the atomic numbers can be used to arrange the elements within themselves and in other groups.Therefore, he discovered the periodic table.
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the boiling point of HF is 1. higher than, 2. lower than, 3. similar to the boiling point of H2 , and it is 1. higher than , 2. lower than , 3. similar to the boiling point of N2
The boiling point of HF is 67.1°F and H2 is -423.2°F so HF is HIGHER than H2 and N2 boiling point is -320.4°F so HF is again HIGHER than N2.
Answer:
Boiling point of HF is greater than both H₂ and N₂.
Explanation:
Boiling point is the temperature at which the vapour pressure of a liquid becomes equal to atmospheric pressure.
Higher the intermolecular force of attractions between molecules of liquid, higher the boiling point.
Hydrogen molecule and nitrogen molecules are non polar covalent molecules. They have weak london dispersion forces in between them.
However in HF there is intermolecular hydrogen bond, which makes the HF molecule to have higher boiling point than both of them.
What was Anton van Lee
I would say the answer is A.
Which is the next logical step in balancing the given equation?
N2 + O2 → NO2
A. Place the coefficient 2 in front of oxygen and nitrogen dioxide.
B. Place the coefficient 3 in front of oxygen and nitrogen dioxide.
C. The equation is already balanced.
D. Change the subscript of the nitrogen molecule to 1.
To balance the given equation, we apply elemental balance and count each elements per side. There are 2 nitrogens in the left side so there should be 2 moles of NO2. Since there are already 4 moles of O in the right side, there should be 2 moles of O2. Hence answer is a. Place the coefficient 2 in front of oxygen and nitrogen dioxide.
Answer:
A. Place the coefficient 2 in front of oxygen and nitrogen dioxide.
Explanation:
Balancing equations is a consequence of the law
of conservation of mass, according to this law, the mass of the reactants must be equal to the mass of the products, this means that the quantity of the atoms found in the reactants must be equal to the quantity of the products In this case, for the equation to be balanced, a coefficient of 2 must be added to oxygen and nitrogen dioxide.
According to the kinetic theory, what is the kinetic energy of a gas molecule proportional to? A. volume of the gas B. pressure of the gas C. temperature of the gas D. density of the gas
D. density of the gas
Answer: C. temperature of the gas
Explanation:
The kinetic theory says that the kinetic energy of the gas molecules (directly related to "how much" the molecules are moving inside the gas) is directly related to the internal energy of the gas, which is related to the temperature.
This relation can be written, in the kinetic theory, as:
(1/2)m*v^2 = (1/2)*Kb*T
where Kb is a constant, and the therm in the left is the kinetic energy, so here we can see that the kinetic energy is proportional to the temperature, where (1/2)*Kb is the constant of proportionality
Use the above picture to fill in the blanks for the following statement. The _______sodium combines with the _______ chlorine to form the _______ sodium chloride.
A. compound; compound; element
B. element; element; compound
C. element; compound; mixture
D. compound; element; mixture
Your answer will be B because sodium and chlorine and both elements and two elements combine to make a compound
Answer : The correct option is, (B) element; element; compound
Explanation :
Mixture : It is defined as the substance that is made by the combination of two or more different components.
Pure substance : It is defined as a substance that is made by the combination of only one type of atom or only one type of molecule.
Compound : It is a pure substance which is made from atoms of different elements combined together in a fixed ratio by mass.
Element : It is a pure substance which is composed of atoms of similar elements.
As per question, the sodium is the element that combines with the chlorine element to form sodium chloride as a compound.
Hence, the correct option is, (B) element; element; compound
Rhizobium:
are nitrogen-fixing bacteria
live in the nodules of legumes
convert nitrogen in soil into nitrogen compounds
all of the above
Rhizobium: are nitrogen-fixing bacteria that live in the nodules of legumes which convert nitrogen in soil into nitrogen compounds. so the answer is all the above i hope this helps
Answer:
All of the above
Explanation:
Rhizobium is an important diazotrophic bacteria in nitrogen cycle. They are involved in a symbiotic relationship with leguminous plants; they assist in nitrogen fixation in the roots of these plant by taking up nitrogen from the atmosphere and passing it into the plants (in the form of ammonia or amino acids) which allows the plant to grow in soil with low nitrogen. The plant in exchange provide organic acids for the bacteria which it uses for carbon and energy source.
From the above, we can deduce that
(a) rhizobium are nitrogen fixing bacteria
(b) they live in the nodules of legumes (hence the symbiotic relationship)
(c) convert nitrogen in soil into nitrogen compounds like ammonia or amino acids
hence, the correct option is all of the above
_______ accounts for most of a cell's mass.
A. Water
B. Food
C. Carbon dioxide
D. Chlorophyll
The answer is
A. water
A. Water
hope this helps
Which term refers to the speed at which reactants are converted into products?
Answer:
Reaction Rate
Explanation:
It means change in concentration of reactants or change in concentration of products per unit time.
Answer:
Reaction rate refers to the speed at which reactants are converted into products.
Explanation:
The complete question is:
"Which term refers to the speed at which reactants are converted into products?
A) reaction rate
B) activation energy
C) meta stable state
D) spontaneous reaction"
In a chemical process, substances called reactants are transformed into products as time passes. The reaction rate is defined as the change in the concentration of one of the reagents or products, in a time interval in which the change takes place. In other words, the speed of a chemical reaction is the speed with which products are formed (or with which reagents disappear).
Chemical kinetics is the area within physical chemistry that is responsible for studying the speed of a reaction, the factors that affect the speed of the reaction, and the mechanism that follows the reaction.
Reaction rate refers to the speed at which reactants are converted into products.
Which of the following is likely to occur if more reactants are added to a reaction that is at chemical equilibrium?
There will be no effect; the reaction will stay at equilibrium
The reaction will shift to the right (toward the products)
The reaction will shift to the left (toward the reactants)
The reaction will shift to the right (toward the products)
Explanation;Le Chatelier's principle states that changing a factor such as concentration, temperature, or pressure of a reaction at equilibrium will cause the reaction to shift in the direction that counteracts the effect of that change.Therefore, when more reactants are added to a reaction at equilibrium shift the reaction shifts to the right to make more products.Answer:
The reaction will shift to the right (toward the products)
Explanation:
What is the concentration of a solution?
Concentration Definition. In chemistry, concentration refers to the amount of a substance per defined space. Another definition is that concentration is the ratio of solute in a solution to either solvent or total solution. Concentration usually is expressed in terms of mass per unit volume.
why is chlorine atom has atomic mass of 35.5 atomic mass unit
I’m not sure exactly what question you’re trying to ask, but I’ll give two answers:
1. The mass is reported as 35.5 amu because atomic weights are reported based on the weights and abundances of the isotopes of that element. For example, Hydrogen (which is typically understood to have only one proton, aka 1 amu) has a weight of 1.004 amu. This is because heavier isotopes of this element do exist but in very small quantities; however, they can still influence the “averaged” weight.
2. The weight of an atom is intrinsic based on its makeup - the number of each component influence the overall weight of the atom. In this case, Chlorine is comprised of the right number of protons and neutrons in the right occurrence and organization such that a weight of 35.5 amu is reported.
Hope this helps!
How many molecules are there in 223 grams of Na2SO4?
= 9.45 × 10^23 molecules
Explanation;The molar mass of Na2SO4 = 142.04 g/mol
Number of moles = mass/molar mass
= 223/142.04
= 1.57 moles
But;
1 mole = 6.02 × 10^23 molecules
Therefore;
1.57 moles = ?
= 1.57 × 6.02 × 10^23 molecules
= 9.45 × 10^23 molecules
What experiment did Robert Millikan do
I think this is the answer but he did the oil drop experiment, i hope this helps
Answer:
he used voltage adjustments to make charged oil drops float.
Explanation:
just did it on apex
Match Match the action to the effect on the equilibrium position for the reaction N2(g) + 3H2(g) ⇌ 2NH3(g).
Match Term Definition
Removing ammonia A) Shift to the left
Removing hydrogen gas B) No effect
Adding a catalyst C) Shift to the right
In accordance with Le Chatelier's principle, the removal of a product will shift the equilibrium to the right, the removal of a reactant will shift the equilibrium to the left and adding a catalyst will have no effect on the equilibrium position.
Explanation:The principle being highlighted in this question is known as 'Le Chatelier's Principle', which states that if a dynamic equilibrium is disturbed by changing the conditions, the position of equilibrium will shift to counteract the change.
Removing ammonia: When the concentration of a product (in this case, ammonia) is decreased, the equilibrium will shift towards the side of the products (or the right) to increase its amount again. Hence, removing ammonia will Shift to the right. Removing hydrogen gas: Hydrogen gas is a reactant. When the concentration of a reactant decreases, the equilibrium will shift towards the reactants side (or the left) to replenish its amount. Hence, removing hydrogen gas would Shift to the left. Adding a catalyst: A catalyst speeds up the rate of a reaction. However, it doesn't shift the equilibrium position, it just helps achieve it faster. So adding a catalyst would have No effect on the equilibrium position. Learn more about Le Chatelier's Principle here:
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Removing ammonia shifts the reaction to the right, removing hydrogen gas shifts it to the left, and adding a catalyst has no effect on the equilibrium position.
In the reaction N2(g) + 3H2(g) ⇌ 2NH3(g):
Removing ammonia: This action reduces the concentration of the product (NH3), causing the reaction to shift to the right (toward products) to replace the removed NH3. Thus, removing ammonia results in a shift to the right.
Removing hydrogen gas: This action decreases the concentration of one of the reactants (H2), causing the reaction to shift to the left (toward reactants) to replenish the lost H2. Thus, removing hydrogen gas results in a shift to the left.
Adding a catalyst: A catalyst speeds up the rate of both the forward and reverse reactions equally and does not affect the position of the equilibrium. Thus, adding a catalyst results in no effect on equilibrium position.
What is an important step to determine the number of grams of SO3 that can be produced by reacting 6 moles of SO2 with oxygen in the synthesis reaction below. 2 SO2(g) + O2(g) —>2 SO3(g)
Answer:
480.40 g.
Explanation:
According to the balanced equation:2 SO₂(g) + O₂(g) → 2 SO₃(g),
it is clear that 2.0 moles of SO₂ react with 1.0 mole of oxygen to produce 2.0 moles of SO₃.
We can get the no. of moles of SO₃ produced:∵ 2.0 moles of SO₂ produce → 2.0 moles of SO₃, from the stichiometry.
∴ 6.0 moles of SO₂ produce → 6.0 moles of SO₃.
Then, we can get the mass of the produced 6.0 moles of SO₃ using the relation:mass = no. of moles x molar mass of SO₃ = (6.0 moles)(80.066 g/mol) = 480.396 g ≅ 480.40 g.
Which of the following could you do to increase the strength of an electromagnet?
Change the core from wood to iron. This is because iron is a magnetic material while wood is not magnetic hence cant acquire magnetism. Other factors that would increase the strength of electromagnet would be; increasing the amount of electric current, and increasing the number of winding's.
PLEASE ANSWER AS FAST AS YOU CAN I'M ON A TIME LIMIT...
A student decides to conduct a comparative investigation to study properties of elements. What is a benefit of conducting a comparative investigation rather than a descriptive investigation?
A.It will be less time-consuming to collect data about elements.
B.It will show a cause-and-effect relationship between two properties of elements.
C.It will be less expensive to collect data and make observations about elements.
D.It will provide much more information about properties of elements.
Answer:
Explanation:
I think its B...
Which of these processes are chemical reactions? 1. boiling an egg 2. crushing spices 3. vegetables rotting 4. chopping vegetables 5. dew forming
That would be vegetables rotting and boiling an egg. . The others are physical changes.
What happens to an acid that causes the formation of a polyatomic ion
When the hydrogen ions (H⁺) from the acid react with the hydroxide ions (OH⁻) from the base. The acid and base neutralize each other. The other ions from both dissolve. When the extra ions dissolved in water from its making evaporate and the ions join to form the compound know as salt.
An acid which causes the formation of a polyatomic ion undergoes dissociation to form hydrogen ions and anions.
What is an acid?
Acids are defined as substances which on dissociation yield H+ ions , and these substances are sour in taste. HCl, H₂SO₄ and HNO₃ are acids as they yield H+ ions on dissociation.
According to the number of H+ ions which are generated on dissociation acids are classified as mono-protic , di-protic ,tri-protic and polyprotic acids depending on the number of protons which are liberated on dissociation.
Acids are widely used in industries for production of fertilizers, detergents batteries and dyes.They are used in chemical industries for production of chemical compounds like salts which are produced by neutralization reactions.
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In the ideal gas law, n represents___.
In an ideal gas law, n represents number of gas molecules in given amount of gas at constant pressure with constant temperature.
Final answer:
In the ideal gas law, the variable 'n' represents the number of moles of a gas, which is essential in calculating the state of an ideal gas along with pressure, volume, and temperature.
Explanation:
In the ideal gas law, represented by the equation PV = nRT, the variable n stands for the number of moles of a gas. The ideal gas law restates the various individual gas laws into a single unified equation, which allows for the calculation of the state of an ideal gas when the pressure (P), volume (V), temperature (T), and number of moles (n) are known. The universal gas constant (R) relates these quantities and is a product of Avogadro's number (NA) and the Boltzmann constant (k).
What is the empirical formula for the compound: C8H8S2?
A. CHS
B. C2H2S0.5
C. C8H8S2
D. C4H4S
The answer is:
D.[tex]C_{4}H_{4}S[/tex]
Why?The empirical formula of a compound is the simplest formula of the same compound, if we are given the molecular formula, we can calculate the empirical formula by finding the mole ratio of each element of the compound.
So, if we know the empirical formula we will be able to get the molecular formula by multiplying it by the mole ratio.
Then, which of the options can give as a result the given molecular formula?
The answer will be D.[tex]C_{4}H_{4}S[/tex] because if we multiply it by 2(mole ratio), it will give us as a result : [tex]C_{8}H_{8}S_{2}[/tex]
[tex]2*(C_{4}H_{4}S)=C_{8}H_{8}S_{2}[/tex]
Have a nice day!
Private land is generally used for _______. a. homes b. businesses c. factories d. all of the above Please select the best answer from the choices provided A B C D
HM, I think the answer would be D. This is just a guess, so please use it if ou want to answer D it's ok :D
Answer: d. all of the above
Explanation:
Private land is the land which is legally occupied by a single ownership. The government has no right over it. The single owner can use the land for the purpose of self benefit. A private land owner can use the land for the purpose of construction of homes, factories and use the land for the commercial businesses like fishing, farming and for other needs.
On the basis of the above explanation, d. all of the above is the correct option.
What is the correct name for CH4?
A)Carbon tetrahydride
B)Carbon (IV) hydride
C)Monocarbon tetrahydride
D)Monocarbon hydroxide
A)Carbon tetrahydride
Explanation;Carbon tetrahydride has the formula CH4. This is because the name begins with carbon (which has the symbol C) and it does not have a numerical prefix (such as di, tri, etc.).If there is no prefix for the first element, it is implied that there is one of that atom. The second part of the name has tetra, which means 4. Hydride is for the element hydrogen, which has the symbol H.Answer:
Carbon tetrahydride is the answer
Explanation:
Which image(s) would be considered pure substances? A) V B) I and II C) II and IV D) III and V
V is the answer for this question
A pure substance is a form of matter with constant composition and properties. Examples include elements and compounds, each with fixed physical and chemical properties and cannot be separated by physical methods.
Explanation:Without the context of visual imagery in the question, it is difficult to provide a precise answer to which image(s) represent pure substances. However, I can explain what a pure substance is. A pure substance is a form of matter that has a constant composition and properties that are constant throughout the sample. Examples of pure substances include elements like iron or copper, and compounds like water or sodium chloride. Pure substances have fixed physical and chemical properties like boiling point, melting point, and density. The special characteristic of pure substances in Chemistry is that they cannot be separated into other kinds of matter by physical methods.
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Which process is most responsible for creating the Earth's magnetic field? A. the motion of the Moon as it revolves around the Earth B. the movement of the Earth through space C. the impact of charged particles from the Sun D. the rotational motion of the Earth and its iron core
the rotational motion of the Earth and its iron core-
Final answer:
The Earth's magnetic field is created by the motion of the Earth's liquid iron outer core, driven by thermal and compositional currents, and the rotational motion of the Earth. This generates electrical currents that are responsible for the magnetic field, making answer D. the rotational motion of the Earth and its iron core the correct one.
Explanation:
Earth's magnetic field is primarily generated by the convective movements of molten metal within its outer core. This movement, coupled with the Earth's rotation, produces electrical currents that generate the magnetic field. These currents of liquid iron create dynamic magnetic fields through a self-sustaining process involving Ampère's law and Faraday's law, which describe the interplay between electric currents and magnetic fields.
This activity in the Earth's outer core is what results in the geomagnetic field that extends far into space, providing a shield against harmful radiation from the sun, including plasma from the solar wind, and contributing to phenomena like the Aurora Borealis.
Therefore, the correct answer is D. the rotational motion of the Earth and its iron core.