Please show how you came up with the answer to 113L of helium at 27 degrees C is cooled at constant pressure to -78.0 degrees C. calculate the new volume

What substance has a mass of 9.5g and volume of 2.1cm^3

Ican determine the molar mass of an element by looking on the under the atomic mass for the element. for example the molar mass of phosphorus is 30.974 grams/mole. avogadro’s number tells me the amount of representative particles in 1 mole of any substance. this means 12.011 gram sample of carbon and a 32.0 gram sample of sulfur have the same number of atoms.

Suppose you wanted to make 100 grams of water. what is the molar mass of water (h2o)?