A 2.95 g piece of zinc (density = 7.14 g/mL) is added to a graduated cylinder that contains 12.13 mL H2O. What will be the final volume reading on the graduated cylinder?

12.54mL

Explanation:

Step 1:

Data obtained from the question:

Mass of Zn = 2.95g

Density of Zn = 7.14 g/mL

Volume of water = 12.13mL

Final volume reading of cylinder =..?

Step 2:

Determination of the volume of Zn. The volume of Zn can be obtained as follow:

Density = Mass /volume

7.14 = 2.95/volume

Cross multiply

7.14 x Volume = 2.95

Divide both side by 7.14

Volume = 2.95/7.14

Volume of Zn = 0.41mL

Step 3:

Determination of the final volume reading of the cylinder.

The final reading of the cylinder will be the addition of the volume of water and the volume of Zn as shown below:

Final volume of cylinder = volume of water + volume of Zn.

Volume of water = 12.13mL

Volume of Zn = 0.41mL

Final volume =..?

Final volume of cylinder = 12.13 + 0.41

Final volume of cylinder = 12.54mL

Therefore, the final volume reading of the cylinder is 12.54mL

the formula mass of a molecule or a compound is the sum of the atomic weights of the atoms in its empirical formula

(that's what i know about formula mass)

i think its 100

i hope this !