1. How many milliliters of 10.0 M HNO 3 are needed to prepare 0.350 L of 0.400 M solution?

14 milliliters

Explanation:

We are given;

10.0 M HNO₃

Prepared solution;

Volume of solution as 0.350 L Molarity as 0.40 M

We are required to determine the initial volume of HNO₃

We are going to use the dilution formula; The dilution formula is;

M₁V₁ = M₂V₂

Rearranging the formula;

V₁ = M₂V₂ : M₁

= (0.40 M * 0.350 L) : 10.0 M

= 0.014 L

But, 1 L = 1000 mL

Therefore,

Volume = 14 mL

Thus, the volume of 10.0 M HNO₃ is 14 mL