At an altitude of 30.0 km, where the temperature is -35 C, a weather balloon containing 1.75 moles of helium has a volume of 2460 L. What is the pressure, in mmHg, of the helium inside the balloon?

The enthalpy of formation of water is -285.8 kj/mol. what can be inferred from this statement?

4. a 20-kg child is tossed up into the air by her parent. the child is 2 meters off the ground traveling 5 m/s. circle one: ke / gpe / both show your work for finding the values of each type of energy the object has:

What is the approximate vapor pressure when the gas condenses at 70 degrees celsius