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?

4. An old antacid commercial claimed that each tablet of their product could "neutralize 47 times its mass in stomach acid". The active ingredient in the antiacid tablet, NaAl(OH)₂CO3, reacts with HCl in stomach acid according to this balanced reaction: NaAl(OH)₂CO3 + 4 HCl →→ NaCl + AlCl³ + 3 H₂O + CO₂ How many moles of HCl can a 1.03 g of antiacid tablet neutralize if the tablet contains 0.246 g of the active ingredient? If stomach acid has a concentration of 0.14 M HCl, assuming the density of stomach acid to be similar to that of water (1.00 g/mL), what is the mass of stomach acid that the 1.03 g of antiacid tablet can neutralize? Does this number support the claim in the commercial?

6.) What is the maximum mass of H20 that Can be produced by Combining 66.4g of each reactant. 4NH3 (g) + 5O₂ (g) → 4NO(g) + 6 H ₂ O (g)

10)

For the reaction 3KOH+H3PO4⟶K3PO4+3H2O3KOH+H3PO4⟶K3PO4+3H2O how many grams of phosphoric acid, H3PO4, are needed to react completely with 13.513.5 g of potassium hydroxide, KOH?

Aluminium has a denisty of 2.70 g/cm^3.  How many moles of aluminum are in a 13.2 cm^3 block of the metal substance?

Write the balanced NET ionic equation for the reaction when aqueous BaCl₂ and aqueous (NH₄)₂SO₄ are mixed in solution to form aqueous NH₄Cl and solid BaSO₄.

ABS plastic is a polymer consisting of three monomer units: acrylonitrile (C₃H₃N), butadiene (C₄H₆), and styrene (C₈H₈). A sample of ABS plastic contains 13.7% N by mass. It took 1.56 g of Br₂ to react completely with a 2.00 g sample of ABS plastic. Bromine reacts 1:1 (by moles) with the butadiene units in the polymer and nothing else, so bromination is a method for determining the quantity of butadiene in the polymer. What is the percent by mass of styrene in the polymer?

3 Cu   +   8HNO3  --> 3 Cu(NO3)2    +  2 NO   +  4  H2O In the above equation how many moles of water can be made when 178.7 grams of HNO3 are consumed?

Chemists can produce silver metal by reacting copper metal with a solution of silver nitrate: Cu(s) + 2 AgNO3(aq) → 2 Ag(s) + Cu(NO3)2(aq) KAU YA (a) Predict the amount of silver produced if 0.24 mol of copper were combined with 0.52 mol of silver nitrate. (b) Predict the amount of excess reagent remaining.