What is the atomic mass of chlorine if 75.77% has an atomic mass of 34.97 u and 24.23% has an atomic mass of 36.97 u?

Agas diffuses 1/7 times faster than hydrogen gas (h2). what is the molar mass of the gas? 100.10 g/mol 98.78 g/mol 86.68 g/mol 79.98 g/mol

Upon decomposition, one sample of magnesium fluoride produced 1.65 kg of magnesium and 2.56 kg of fluorine. a second sample produced 1.32 kg of magnesium. part a how much fluorine (in grams) did the second sample produce?

To calculate percent by mass, use the equation below: calculate the percent by mass of each element. %n = % %h = % %o = %