NinaMarmolejo5862 NinaMarmolejo5862
  • 17-12-2021
  • Chemistry
contestada

A sample of carbon-12 has a mass of 6. 00 g. How many atoms of carbon-12 are in the sample? 3. 01 Ă— 1023 6. 02 Ă— 1023 1. 20 Ă— 1024 3. 60 Ă— 1024.

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rspill6
rspill6 rspill6
  • 22-12-2021

Answer:

3.01x10^23 C-12 atoms

Explanation:

C-12 has a molar mass of 12 grams/mole.  6 grams would therefore be (6grams/(12 grams/mole) = 0.5 moles.

One mole = 6.02x10^23 atoms

0.5 moles would mean 3.01x10^23 C-12 atoms

I don't know how to interpret the answer options.  What does "01 Ă— 1023" mean?  I see "3. 01 Ă— 1023 " which has some distant match to "3.01x10^23," but it is hard to judge.  Use the "^" sign to indicate a power, such as 10^23

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