Question

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.

Answer 1

3.01x10^23 C-12 atoms

Step-by-step 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