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poizon [28]
2 years ago
8

Can someone please help me? :(

Chemistry
1 answer:
Karolina [17]2 years ago
6 0

Answer:

C I think

Explanation:

A duck isn't supposed to bring a sandwich to people, so i believe that the duck learned how to do that. (Sorry if it's wrong)

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A sample of C3H8 has 6.72 x 10^24 H atoms. <br> What is the total mass of the sample?
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1. Calculate a number of moles of a sample.
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3. Calculate a mass of the sample. 

1. Avogadro's number is the number of units (atoms, molecules) in 1 mole of substance: 6.023 × 10²³ units per 1 mole    

6.023 × 10²³ atoms : 1 mol =6.72 × 10²⁴ atoms : n

n = 6.72 × 10²⁴ atoms * 1 mol : 6.023 × 10²³ atoms = 1.12 × 10 mol = 11.2 mol


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3. Mass (m) of a sample is number of moles (n) multiplied by molar mass (Mr) of C3H8:

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