Question

analyze
using your experimental data, record the answers to the following questions.

1. what is the average mass of a single drop of water in milligrams? (1 g = 1000 mg)
2. the density of water is 1.00 g/cm³. calculate the volume of a single drop in cm³ and ml. (1 ml = 1 cm³)

what is the volume of a drop in microliters (μl)? (1000 μl = 1 ml)

1. what is the density of water in units of mg/cm³ and mg/ml? (1 g = 1000 mg)
2. pennies made before 1982 consist of 95.0% copper and 5.0% zinc. calculate the mass of copper and the mass of zinc in the pre - 1982 penny.
3. pennies made after 1982 are made of zinc with a thin copper coating. they are 97.6% zinc and 2.4% copper. calculate the mass of copper and the mass of zinc in the newer penny.
4. why does one penny have less mass than the other?

Explanation:

Step1: No experimental data given for water drop mass.

Cannot calculate.

Step2: Without drop mass, cannot find volume.

Cannot calculate.

Step3: Convert density units.

$1.00\ g/cm^{3}=1000\ mg/cm^{3}=1000\ mg/mL$

Step4 - 5: Need penny mass value to calculate.

Cannot calculate.

Step6: Different compositions affect mass.

Newer penny has more low - density zinc.

Answer:

1. Cannot calculate.
2. Cannot calculate.
3. $1000\ mg/cm^{3}$, $1000\ mg/mL$
4. Cannot calculate.
5. Cannot calculate.
6. Newer penny has more low - density zinc.