When the equation Al2(SO3)3+ HCl → AlCl3+ H2SO3 is balanced, the smallest whole number coefficient for HCl is a: 6
b: 1
c: 2
d: 4

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 is the correct equation for cellular respiration?

Which describes fat? a: a carbohydrate that produces energy b: a nucleic acid that directs cell function c: a lipid that stores energy d: a protein that speeds up a chemical reaction