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Zarrin [17]
3 years ago
15

How many grams of copper Cu, 63.54 g/mol are in 3.42 moles copper

Chemistry
1 answer:
DIA [1.3K]3 years ago
7 0
Answer:
              Mass  =  217.30 g

Solution:

Mass and moles are related to each other as,

                                  Moles  =  Mass / M.mass  ---- (1)

Where;
            Moles  =  3.42

            M.Mass  =  63.54 g.mol⁻¹

Solving eq. 1 for Mass,

                                  Mass  =  Moles × M.mass
Putting Values,
                                  Mass  =  3.42 mol × 63.54 g.mol⁻¹

                                  Mass  =  217.30 g
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How many moles is ( 1 x 10^9 ) molecules O2
Effectus [21]

Answer:

The answer is

1.66 \times  {10}^{ - 15}  \:  \: moles

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

n =  \frac{N}{L}   \\

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

n =  \frac{1 \times  {10}^{9} }{6.02 \times  {10}^{23} }  \\

We have the final answer as

1.66 \times  {10}^{ - 15}  \:  \: moles

Hope this helps you

4 0
3 years ago
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ziro4ka [17]

Answer:

b. H3O c. H2SO4 d. HNO3

Explanation:

The hydrogen bonds can be form with molecules that have free electron pairs  and hydrogen atoms. In the case of NH4 molecule, the "free" electron pair in the nitrogen is not free because there is an hydrogen occuping them, and, in fact, this molecule has a positive charge. The other acids have free electron pairs in the oxigen, nitrogen or sulfur.

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3 years ago
What is the ideal gas constant?
AURORKA [14]

Answer:

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Compare the type of change that occurs when a substance melts and when a substance is set on fire. Use complete sentences to jus
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When a substance melts it has changed from a solid to a liquid state while when a substance is set on fire is changes from liquid to gaseous state as it boils.

<h3>What is change of state?</h3>

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When a substance melts it has changed from a solid to a liquid state while when a substance is set on fire is changes from liquid to gaseous state as it boils.

Learn more about matter here:

brainly.com/question/3998772

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8 0
2 years ago
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