A student weighs a 0.0144 g sample of magnesium metal. How many moles of magnesium does the sample contain?

Agas is contained in a thick walled balloon when the pressure changes from 1.21 atm to 2.52 the volume changes from 3.75 l to 1.72 l and the temperature change from 293k to blank k

At a temperature of 393 k, the temperature of a sample of nitrogen is 1.07 atm what will the pressure be at a temperature of 478 k

Why doesn't heat added to water make the tempature rise above 100c