Chemistry College

How many atoms are in 2.37 moles of Krypton

Answers

Answer 1

Answer:

1.43 × 10²⁴ atoms Kr

General Formulas and Concepts:

Chemistry - Atomic Structure

Using Dimensional AnalysisAvogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.

Explanation:

Step 1: Define

2.37 mol Kr

Step 2: Convert

[tex]2.37 \ mol \ Kr(\frac{6.022 \cdot 10^{23} \ atoms \ Kr}{1 \ mol \ Kr} )[/tex] = 1.42721 × 10²⁴ atoms Kr

Step 3: Check

We are given 3 sig figs. Follow sig fig rules and round.

1.42721 × 10²⁴ atoms Kr ≈ 1.43 × 10²⁴ atoms Kr

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The oxidation state of a free element (uncombined element) is zero. For a simple (monoatomic) ion, the oxidation state is equal to the net charge on the ion. For example, Cl– has an oxidation state of -1. When present in most compounds, hydrogen has an oxidation state of +1 and oxygen an oxidation state of −2.

Answer:

The oxidation state of a free element (uncombined element) is zero. For a simple (monoatomic) ion, the oxidation state is equal to the net charge on the ion. For example, Cl– has an oxidation state of -1. When present in most compounds, hydrogen has an oxidation state of +1 and oxygen an oxidation state of -2

What is a solute?
A material that is dissolved in another material.
O A material in which another material is dissolved.
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O Chemical formulas on the left side of an equation.

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A material that is dissolved in another material.

Help me please this is due today

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The only thing I can remember from chem that pertains to this is that a neutral solution will have a pH of 7.
Also, I’m pretty sure acidity & pH have to do something with hydrogens ions or something. Sorry, hope this helps at least a little.

15 points! Answer only if you can please!
1. Have you ever grabbed the handle of a hot metal pan? Why did it feel hot to you?

2. What would happen if a person who is wearing a heavy winter jacket were to place a thermometer inside the jacket next to his or her skin? What would happen if we took the same jacket, after it had been hanging in a closet, and placed a thermometer inside?

3. How do you think the transfer of thermal energy causes unpopped popcorn kernels to pop?

Answers

Answer:

1. Yes

2. it would be the same i guess

3. because it travels to popcorn kernels with its heat and makes it pop'

did i get it right?

Explanation:

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