A 17.0 g sample of CaSO4, is found to contain 5.00 g of Ca and 7.99 g of O. Find the mass of sulfur in a sample of CaSO4 with a mass of 64.7 g.
mass of sulfur =?

Aballoon inflated with three breaths of air has a volume of 1.7 l. at the same temperature and pressure, what is the volume of the balloon if five more same-sized breaths are added to the balloon? a balloon inflated with three breaths of air has a volume of 1.7 l. at the same temperature and pressure, what is the volume of the balloon if five more same-sized breaths are added to the balloon?

Nuclear fusion is the source of energy for stars. besides hydrogen, which other element is most likely also common in stars?

What four properties do all waves have in common