A gas sample has a volume of 25.0 milliliters at a pressure of 1.00 atmosphere. If the volume increases to50.0 milliliters and the
temperature remains constant, the new pressure will be *

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.