1 no.
PV = nRT and solve for n = number of mols. Then n x 6.022E23 = number He atoms. Same at both temperatures.
2. density = P*molar mass/RT gives density in g/L. Convert to g/L.
A weather balloon is inflated with helium to a volume of 28.1 L at a pressure of 754 torr and a temperature of 26.0 Celsius. The balloon rises in the atmosphere to an altitude where the pressure is 380 torr and the temperature is -16.1 degree Celsius.
1. Calculate the number of helium atoms per liter for both altitudes.
Is it 2.44 x 10^22 He atoms per liter?
2. Calculate the gas density (g/mL) for each altitude (AW He= 4.00 g/mol).
1 answer
1 answer