Question

A student carefully pipets 10.00ml of ethanol into a beaker. If ethanol has a density of 0.779g/ml, how many grams of ethanol were put into the beaker?

Answer 1

Answer: 7.79 grams of ethanol were put into the beaker.

Step-by-step explanation:

To calculate the mass of ethanol, we use the equation:

`\text{Density of substance}=\frac{\text{Mass of substance}}{\text{Volume of substance}}`

Density of ethanol = 0.779 g/mL

Volume of water = 10.00 mL

Putting values in above equation, we get:

`0.779g/mL=\frac{\text{Mass of ethanol}}{10.00mL}\\\\\text{Mass of ethanol}=(0.779g/mL* 10.00mL)=7.79g`

Thus 7.79 grams of ethanol were put into the beaker.