What is the percent yield of potassium chloride if potassium reacts with excess chlorine gas to produce 10.3 grams of potassium chloride, but the theoretical yield is 12.9 grams?
a. 33.2%
b. 52.4%
c. 79.8%
d. 95.3%

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?

Enzymes affect the reactions in living cells by changing the

What does the xylem do? stores the glucose captures the sunlight absorbs oxygen into the leaf carries water from the roots to the leaves