Answer:
B
Explanation:
Crush solid reactant into smaller pieces.
The mass number (A), also called atomic mass number or nucleon number, is the total number of protons and neutrons (together known as nucleons) in an atomic nucleus. The mass number is different for each different isotope of a chemical element.
2.09 mL
density = mass/volume
13.8 = 28.9/v
13.8v = 28.9
v = 2.09 mL
see the pic for the answer
red
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