Question

How many grams of HNO3 are in 75ml of a 8.0M HNO3 solution?

Answer 1

8.0M means that there are 8 moles in 1L of the solution.

8 moles = 1.0L

x moles = 0.075L

x = $\dfrac{8×0.075}{1.0}$ = 0.6 moles

molar mass of HNO₃ = $(1+14+(16×3))$ = $63\text{ g/mol}$

1 mole of HNO₃ = 63 grams

0.6 moles = y grams

y = $\dfrac{63×0.6}1$ = 37.8 grams.