Calculate the percent composition by mass of each of the following compounds. Part A CaCl2, calcium chloride Express your answers using two decimal places. Provide the mass percents for Ca first, then Cl, and separate values with a comma (e. g., 38.55,61.45).

Which of the following is a compound? a.carbon b.oxygen c.hydrogen d.water

The excretory system,need answers for all: )

Which of the following contributes to the structural rigidity of cellulose? adjacent glucose polymers are stabilized by hydrogen bonding. glucose residues are joined by (α1→4) linkages. cellulose is a highly branched molecule. the conformation of the glucose polymer is a coiled structure.