The density of a liquid is 1.25 g/mL. What is the mass of 75.0 mL of the sample?

The answer is 93.75 g

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

mass = Density × volume

From the question

density = 1.25 g/mL

volume = 75.0 mL

We have

mass = 1.25 × 75

We have the final answer as

93.75 g

Hope this helps you

Answer : The concentration of the resulting diluted solution will be 0.5 m.

Explanation : As we can see that the mole concentration is given as 2.00 m and the volume is 0.200 L and we need to find the moles in 0.800 L of the diluted solution.

Here the formula of   applies,

so on applying the formula we obtain the value of  which is unknown in this case, will be :- (0.200 X 2.00) / 0.800 = 0.5 moles.