Question

How many moles of water, H2O, contain 2.0×10^22 molecules of water? (See the hints for assistance in interpreting scientific notation.)

Answer 1

Answer:

The answer is 0.03 moles

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

$n = \frac{N}{L}$

From the question we have

$n = \frac{2.0 \times {10}^{22} }{6.02 \times {10}^{23} } \\ = 0.033222591...$

We have the final answer as

0.03 moles

Hope this helps you