A sample of helium gas collected at a pressure of 1.03 atm and a temperature of 7.00 °C is found to occupy a volume of 27.1 liters. How many moles of He gas are in the sample? mol

water at room temperature is flowing through a pipe with pressure taps located 10 ft apart along one section of the pipe, which are connected to a mercury (s=13.6) manometer.

a gas, having a molecular weight of 13 kg/kmol and a kinematic viscosity of 0.25 cm2/s, flows through a pipe 0.25 m internal diameter and 5 km long at the rate of 0.4 m3/s and is delivered at atmospheric pressure.

i believe the answer is three water molecules