Mass Percentage, Volume Percentage, Mass by Volume Percentage — Prelims Questions

A solution is prepared by dissolving $15,\text{g}$ of urea (molar mass $60,\text{g/mol}$) in $135,\text{g}$ of water. What is the mass percentage ($w/w$) of urea in the solution?

An antiseptic solution contains $70,\text{mL}$ of ethanol in a total solution volume of $100,\text{mL}$. What is the volume percentage ($v/v$) of ethanol in the solution?

A $500,\text{mL}$ bottle of intravenous glucose solution contains $25,\text{g}$ of glucose. What is the mass by volume percentage ($w/v$) of glucose in this solution?

Which of the following concentration terms is independent of temperature?

A solution has a mass percentage of $20$ ($w/w$) of $NaOH$. If the density of the solution is $1.2,\text{g/mL}$, what is the mass by volume percentage ($w/v$) of $NaOH$ in the solution?

When $20,\text{mL}$ of liquid A is mixed with $80,\text{mL}$ of liquid B, the final volume of the solution is found to be $98,\text{mL}$. What is the volume percentage ($v/v$) of liquid A in the solution?