If 14.0 grams of C2H4 and 155 grams of O2 are reacted in the balanced equation below and 38.0 grams of CO2 is collected, calculate the percent yield of carbon dioxide ? C2H4 + 3 O2 2 CO2 + 2 H2O

Asample of the male sex hormone testosterone, c19h28o2, contains 3.88×10^21 atoms of hydrogen.(a) how many atoms of carbon does it contain? (b) how many molecules of testosterone does it contain? (c) how many moles of testosterone does it contain? (d) what is the mass of this sample in grams?

What problem would a person have if the nucleic acid in one of his or her cells were damaged?

What is the equilibrium constant of aa+bb=cc+dd