The following equation is balanced. Choose ALL of the true statements which apply to its interpretation.

CaF2 + H2SO4 > CaSO4 + 2 HF

(a) The number of moles of calcium fluoride equals the number of moles of calcium sulfate (i. e., is in a 1:1 ratio).
(b) Two grams of HF are produced from one gram of calcium fluoride.
(c) There are 2 moles of fluorine atoms for the reactants and 2 moles of ions for the products.
(d) Hydrogen fluoride is a product of this reaction.

For a research project, a student decided to test the effect of the lead(ii) ion (pb2+) on the ability of salmon eggs to hatch. this ion was obtainable from the water‐soluble salt, lead(ii) nitrate, which the student decided to make by the following reaction. pbo(s) + 2 hno3(aq) → pb(no3)2(aq) + h2o losses of product for various reasons were expected, and a yield of 86.0% was expected. in order to have 5.00 g of product at this yield, how many grams of pbo should be reacted? (assume that sufficient nitric acid, hno3, would be used.)