posted by Christina .
A sealed flask contains 1 mole of hydrogen and 3 moles of helium gas at 20DC. If the total pressure is 40kPa, what is the partial pressure of the Hydrogen gas?
The data below was obtained by a student in order to determine the percent of water in a Hydrate:
Mass of the Hydrate..............5.0gram
Mass of the Anhydrous Compound.. 3.2gram
What is the percent in the Hydrate?
PLEASE ANSWER THESE ASAP :D