91Ó°ÊÓ

We need to identify the property of a gas that is measured as$425K$

As property measured has unit of measurement as $K$. Hence, measured quantity is temperature. It is denoted by $T$. It is determining factor of kinetic energy of gas molecules.

We need to identify the property of a gas that is measured as$1atm$

As property measured has unit of measurement as $atm$. This unit defines force exerted by gas against wall of container. Hence, measured quantity is pressure. It is denoted by$P$.

We need to identify the property of a gas that is measured as$10.0L$

The measured quantity $10.0L$defines space occupied by gas and $L$is unit of measurement of volume. Hence, property is volume. It is denoted by$V$ .

We need to identify the property of a gas that is measured as$0.50$mole of$\mathrm{He}$

The measured quantity $0.50$mole defines quantity of gas. It is unit of amount. Hence, property of gas measured in amount. It is denoted by$n$.