Question

How many moles are in 17.0 grams of H2O2?

Answer 1

Answer:

C) 0.500 mol H2O2 is correct

Explanation:

I just took the test and got it right ;)

Answer 2

Answer: Option (c) is the correct answer.

Explanation:

Number of moles is defined as given mass of substance divided by molar mass.

Mathematically,    No. of moles = $\frac{mass of given substance}{molar mass}$

Molar mass of $H_{2}O_{2}$ is 34.015 g/mol.

Therefore, calculate number of moles of $H_{2}O_{2}$ as follows.

       No. of moles = $\frac{mass of given substance}{molar mass}$

                             = $\frac{17.0 g}{34.015 g/mol}$

                             = 0.4997 mol

or,                          = 0.500 mol (approx)

Thus, we can conclude that 0.500 mol is present in 17.0 grams of $H_{2}O_{2}$.