Question

if you collect 1.75 L of hydrogen gas during a lab experiment, when the room temperature is 23ºC  and the barometric pressure is 105 kPa, how many moles of hydrogen will you have?

Answer 1

using gas law,

$P*V =n *R*T$

Using given data,

n $=\frac{P*V}{R*T}$

therefore, n = 0.074 moles