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A sample of gas occupies $485mL$ at $687C$ and a pressure of $3\mathrm{.}25$atm. Calculate the new temperature, in Celsius, if the pressure is lowered to $275$ torr and the new volume is $1\mathrm{.}96L.(1$ torr $=1mmHg)$

A mixture of $16\mathrm{.}0$ grams $H_2,20\mathrm{.}0$ grams of $He,$ and $7\mathrm{.}00$ moles of $Ar$ in a $15-$liter container has a total pressure of $60\mathrm{.}0$atm. Calculate the partial pressure of each gas.

$(10)$