Which reactants would lead to a spontaneous reaction? Mn2+ and Al
Mn and Al3+
Al and Mn
Mn2+ and Al3+

Answers

Answer 1

Answer:

The reactants that would lead to a spontaneous reaction are Mn2+ and Al3+. Al and Mn are not because they are stable reactants. Mn and Al3+ are not because Mn is stable. Mn2+ and Al are not because Al is stable.

Answer 2

Answer:

Answer:

ITS B

Explanation:

I took the test on edge

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Which element has the greatest electronegativity?a. Chlorine b. Oxygen c. Sulfur d. Phosphorus e. Fluorine

Which element is a liquid at STP?
(1) argon (3) chlorine
(2) bromine (4) sulfur

Answers

Answer: Option (2) is the correct answer.

Explanation:

STP means standard temperature and pressure.

At STP chlorine exists as a gas, sulfur exists as a solid and argon also exists as a gas.

Whereas bromine exists as a liquid at STP.

Thus, we can conclude that out of the given options bromine is the element which exists as a liquid at STP.

The element that is a liquid at standard temperature and pressure (STP) is bromine (Br). Therefore, option 2 is correct.

Bromine is the only element among the options given that is a liquid at STP. It is a reddish-brown liquid with a strong and unpleasant odor. Bromine is a halogen and exists as diatomic molecules (Br₂).

It has a boiling point of 58.8°C (137.8°F) and a melting point of -7.2°C (19.0°F). Bromine is significantly more reactive than argon but less reactive than chlorine and sulfur.

Argon (Ar) is a noble gas and exists as a colorless and odorless gas at STP. Chlorine (Cl) is a greenish-yellow gas at STP. Sulfur (S) is a solid at STP and melts at a relatively high temperature.

To learn more about the element, follow the link:

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Calculate the pH of 0.50M H2S

Answers

I got that pH=3.65 using the fact that Ka=[H⁺][A⁻]/[HA] at equilibrium. In the ice table, I stands for initial, C stands for change, and E stands for equilibrium.

I hope this helps. Let me know if anything is unclear.

For an experiment, you place 15 g of ice with a temperature of -10 C into a cup and labela. You also place 25 g of ice at the same temperature into another cup and label it
b. Which of the following statements is true?
A) The average kinetic energy of the ice in cup A is less than that in cup
b.
B)The average kinetic energy of the ice in cup A is greater than that cup in
b.
C)The average kinetic energy of the ice cup A is equal to that in cup
b.
D)The average kinetic energies of the ice in cup A and the ice in cup B are not comparable.

Answers

Average kinetic energy is given by the formula:

KE(average) = 3/2*k*T

where k = Boltzmann constant = 1.38*10⁻²³ J/K

T = temperature in Kelvin (K)

Thus, the average KE is dependent only on temperature and independent of mass.

Since the temp in Cup A and B remains the same, the average KE will also be the same.

Ans C)

The correct answer is c. Temperature is the average kinetic energy of a sample so if two samples have the same temperature they will also have the same average kinetic energy. I hope this helps. Let me know if anything is unclear.

Which statement correctly describes a solution with a pH of 9?(1) It has a higher concentration of H3O+ than OH– and causes litmus to turn blue.
(2) It has a higher concentration of OH– than H3O+ and causes litmus to turn blue.
(3) It has a higher concentration of H3O+ than OH– and causes methyl orange to turn yellow.
(4) It has a higher concentration of OH– than H3O+ and causes methyl orange to turn red.

Answers

A solution with a pH of 9 will have a higher concentration of $OH^-$ and will turn red litmus to blue.

What is pH

It is the degree of acidity or alkalinity of substances.

A pH of 7 is neutral, below 7 is acidic, and above 7 is alkaline or basic.

A base generally have $OH^-$ as the only negative ions when ionized in aqueous solutions. Bases also turn red litmus to blue.

Thus, a solution with a pH of 9 will have a higher concentration of $OH^-$ and will turn red litmus to blue.

More on pH can be found here: brainly.com/question/15289741

Answer: Option (2) is the correct answer.

Explanation:

It is known that when pH of a solution is less than 7 then the solution is acidic in nature and turns blue litmus into red. Whereas when pH of a solution is more than 7 then the solution is basic in nature and turns red litmus into blue.

Hydrogen ions can also be released in the form of hydronium ions ( $H_(3)O^(+)$ ).

And, when a solution has pH 9 then it means the solution is basic in nature.

That is, there will be more number of hydroxide or $OH^(-)$ ions as compared to hydrogen ions or $H_(3)O^(+)$ ions.

Thus, we can conclude that the statement it has a higher concentration of OH– than H3O+ and causes litmus to turn blue correctly describes a solution with a pH of 9.

How many atoms are in 0.750 moles of zinc?

Answers

There are approximately 4.52 x 10^23 atoms in 0.750 moles of zinc.

How to find the number of atoms

To determine the number of atoms in a given amount of a substance, you can use Avogadro's number, which is approximately 6.022 x 10^23 atoms/mol.

Given that you have 0.750 moles of zinc, you can calculate the number of atoms using the following steps:

Multiply the given number of moles by Avogadro's number:

0.750 moles * (6.022 x 10^23 atoms/mol) = 4.5165 x 10^23 atoms

Round the result to an appropriate number of significant figures:

Since the value given has three significant figures, the final answer should be rounded accordingly. Therefore, the number of atoms in 0.750 moles of zinc is approximately 4.52 x 10^23 atoms.

So, there are approximately 4.52 x 10^23 atoms in 0.750 moles of zinc.

Learn more about zinc at

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(doesn't really matter that it's zinc :) )
It is $0.75*N_A$ , where $N_A=6.023*10^(23)$ (in some books 6.022).

The value of the equilibrium constant for the combination of nitrogen and oxygen to make NO is 2 x 10-9. What does this tell you about the concentrations of materials in the equilibrium mixture?

Answers

Answer: The reaction must proceed in the reverse direction.

Explanation:

$K_p$ is the constant of a certain reaction at equilibrium while $Q_p$ is the quotient of activities of products and reactants at any stage other than equilibrium of a reaction.