Balance the reaction. a coefficient of "1" is understood. choose option "blank" for the correct answer if the coefficient is "1."
hcl + zn → zncl 2 + h 2
the options are 2, 3, 4, and blank.

According to each substances heat of fusion, which of the items below requires more heat to be added per gram of substance to go from solid to liquid? silver sulfur water lead

Marcel just purchased 1.69 grams of iron fillings in order to make living putty for his 6 year old niece. how many moles of iron are made in his sample?

We are hoping to create 5.72 grams of glucose. the plant was given 4.75 liters of co2 and 2.81 g of h20. which reactant was the limiting reagent? how much excess mass did we have of the other reactant?