Question

How many moles are present if a container holds 3.9 x 10²⁴ molecules of a substance?

A) 0.065 moles
B) 6.022 x 10²³ moles
C) 3.9 x 10²⁴ moles
D) 10 moles

Answer 1

The container with 3.9 x 10²⁴ molecules holds approximately 6.47 moles of the substance, calculated using Avogadro's number as a conversion factor.

Step-by-step explanation:

To determine the number of moles present in a container holding 3.9 x 10²⁴ molecules of a substance, we use Avogadro's number, which is 6.022 x 10²⁳ molecules per mole. This number can be used as a conversion factor to go from molecules to moles.

The calculation is as follows:

• (3.9 x 10²⁴ molecules) / (6.022 x 10²⁳ molecules/mol) = moles
• moles = approximately 6.47 moles

Therefore, the container holds approximately 6.47 moles of the substance.