Consider the following.

"Calculate the pressure exerted by 6.9 g of argon in a 0.07500 L container at 11.5 °C."

The number of significant figures that should be expressed in the answer is

1. 2
2. 3
3. 4
4. 5

An aerosol can with a volume of 300.0 mL contains 2.80 g of propane gas as a propellant. The warning label says the aerosol may explode at temperatures above 60.0 °C.

What is the pressure in the can at a temperature of 60.0 °C?   (2 marks)