Question
Asked Aug 30, 2019
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I thought my answer was correct, but it wasn't. 

Part C
g),
atoms of carbon-12 (1.992646 x 10-23
Express your answer using seven significant figures.
ΑΣφ
11.99971
g/mol
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Part C g), atoms of carbon-12 (1.992646 x 10-23 Express your answer using seven significant figures. ΑΣφ 11.99971 g/mol Submit Previous Answers Request Answer X Incorrect; Try Again; 3 attempts remaining

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Expert Answer

Step 1

1 mole of any substance contains 6.022 x 1023 atoms or molecules or particles. Here 6.022 x 1023 is known as Avogadro number.

Step 2

Given:

Mass of C-12 = 1.992646 x 10-23 g

Molar mass of C-12 = 12 g

Number of moles of C-12 in given mass: 

1 mole
1.992646 x 10 g * 12 g
0.166 x 1023 moles
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1 mole 1.992646 x 10 g * 12 g 0.166 x 1023 moles

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Step 3

Convert moles to number of atoms:

1 mole =...

0.166 x 1023 moles x 6.022 x 1023atoms
1 mole
0.9999762 atoms
=
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0.166 x 1023 moles x 6.022 x 1023atoms 1 mole 0.9999762 atoms =

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