Question

q7. density is how much (mass or volume) there is per given size of a material. mass volume q8. what is the mass of water based on the following information? mass of empty beaker: 120 grams mass of beaker and water: 170 grams 120 grams 50 grams 170 grams

Explanation:

Q7:

Density is defined as mass per unit volume. So it represents how much mass there is per given size (volume) of a material.

Q8:

The mass of water can be found by subtracting the mass of the empty beaker from the mass of the beaker and water.
Let $m_{empty}$ be the mass of the empty beaker and $m_{total}$ be the mass of the beaker and water. Then the mass of water $m_w=m_{total}-m_{empty}$.
$m_{empty} = 120$ grams and $m_{total}=170$ grams. So $m_w=170 - 120=50$ grams.

Answer:

Q7. mass
Q8. 50 grams