A) What is the molar mass of nickel (II) sulfate (NISO4) in grams per mole?  B) What is the amount (in mole) of 3.77 x 10^30 water molecules? C) What is the mass in grams of 2.68 x 10^-5 mol of caffeine (Mr = 194.1 g mol-1)   D) Seceral brands of antacids use Al(OH)3 to react with stomach acid, which contains primarily HCI. The reaction proceeds according to the balanced equation Al(OH)3 (s) + 3 HCI (aq) to AICI3 + 3 H2O (I)  If you have 4.50g of aluminium hydroxide and 0.0500 mol of hydrochloric acid, which of these will be the limiting reagrnt?

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Q: how many grams of water will be formed

A: Given :- mass of Fe2O3 = 27.2 g  To calculate :- mass of H2O (in g)

Q: what mass of nitrogen would result?

A: number of moles = mass/molar mass  so, mass = moles × molar mass

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Q: A 12.3 g sample of an alloy of Mg and Al produces 1.66 mol of H2 when added to excess HCl. What…

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Stoichiometry

Stoichiometry is a chemical division that evaluates the quantitative content of the chemical process with the help of the reacting molecules or products taking part in the reaction. The term “stoicheion” in “Stoichiometry”, is an old Greek term for "element" whereas “metron” means "measure".