The value of which of the following units of concentration will not change with the change in temperature?

Which of the following solutions has the highest amount of solute (in grams)?

If the mole fraction of ethanol in a solution of ethanol in water is $0.050$,then find the molarity of the given solution. (in $M$)

What is molarity?

$A$ solution is obtained by mixing $400 \ g$ of $25 \%$ solution and $600 \ g$ of $40 \%$ solution by mass. What is the mass percentage of the resulting solution (in $\%$)?

What is the final molarity of a solution obtained by mixing $480 \, mL$ of $1.5 \, M$ solution and $520 \, mL$ of $1.2 \, M$ solution (in $, M$)?