Runoff (Hope this helped)
Answer:

Explanation:
Given :
Mass of a bar of lead = 115.2 g
Initial water level
= 25 mL
Final water level
= 35.5 mL
Difference in the water level = 35.5 - 25
= 10.5 mL
= 
We know that when a body is submerged in water, it displaces its own volume of water.
Therefore, the volume of the lead bar = volume of the water displaced = 10.5 mL = 
We know that mathematically, density is the ratio of mass of body to its volume.
Density of the lead bar is given by :


= 
The atomic number represents the number of protons present in an atom.Therefore,the answer is B.
Answer: V = 16.1 L
Explanation:Using Ideal gas law formula PV = nRT, we will derive for Volume. V = nRT / P
V = 0.34 mole ( 0.0820574 L.atm/ mole .K)(321 K ) / 0.5567 atm
= 16.1 L