Answer
a.
Solute: $10.0 \space g \space of \space NaCl$
Solvent: $100.0 \space g \space of \space H_2O$
b.
Solute: $10.0 \space mL \space of \space H_2O$
Solvent: $50.0 \space mL \space of \space ethanol$
c.
Solute: $0.20 \space L \space of \space O_2$
Solvent: $0.80 \space L \space of \space N_2$
Work Step by Step
Most of the time, the solute is the substance present in the lesser amount, and the solvent is the substance present in the greater amount.
a. $100.0 \space g \gt 10.0 \space g$
b. $50.0 \space mL \gt 10.0 \space mL$
c. $0.80 \space L \gt 0.20 \space L$
