2 years ago

What occurs when Cr^3+ ions are reduced to Cr^2+ ions?

1 answer:

7 0

D:

When electrons are gained, the charge of the atom decreases.

When you are given an atom with a charge, the oxidation of that atom is the charge. So by going from a Cr^3+ (Oxidation Number = 3) to a Cr^2+ (Oxidation Number = 2), the Oxidation Number thus decreases.

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Which of the following samples contains the greatest number of atoms?

mart [117]

Answer:

C. 11 moles of N2O

Explanation:

A. CO2 exists as a molecular compound. The number of atoms present = 1 atom of Carbon and 2 atoms oxygen = 3 atoms * 9 = 18 atoms

B. Xe exists as an atom. Number of atoms present = 10 * 1 atom = 10 atoms

C. N20 contains 3 atoms; 2 atoms of Nitrogen and 1 atom of oxygen.

Number of atoms present = 3 * 11 = 33 atoms

D. CO contains 2 atoms, 1 each of carbon and oxygen.

Number of atoms present = 12 * 2 = 24 atoms

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2 years ago

How do you view failure? Is failure the end, or is failure an important lesson and motivator?

Katyanochek1 [597]

Answer:

Failure is a lesson

Explanation:

Without failure, we'd be less capable of compassion, empathy, kindness, and great achievement. It's through failure that we learn the greatest lessons that life could teach us.

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3 years ago

Rank the following in order of increasing (lowest to highest) reactivity:

choli [55]

Answer:

a) Li<Na<Rb

b) P<S

c) Rn<Xe

d) Hg<W<Cs

4 0

2 years ago

What is the volume of 2.5 moles of nitrogen gas (N2)<br>at standard temperature and pressure (STP)?

gregori [183]

Answer:

1 mole of gas = 22.4L

2.5 moles of gas takes up = ( 22.4 L/ 1 mole ) x 2.5 mole

= 56 L

Explanation:

Please mark brainliest and have a great day!

8 0

3 years ago

As a gas changes to a solid, energy<br> A. is not used.<br> B. is released.<br> C. is absorbed.

pogonyaev

Answer:

Explanation:

Energy is released, when a gas changes to solid

7 0

2 years ago