How many moles of OH− are there in 2.999 g of Mg(OH)2?Give your answer in moles and to three decimal places.(Molar mass of  Mg(OH)2 = 58.32 g mol−1)

Question 2Tips1 ptsHow many moles of OH− are there in 2.286 g of Mg(OH)2?Give your answer in moles and to three decimal places.(Molar mass of  Mg(OH)2 = 58.32 g mol−1) Flag question: Question 3Question 3Tips1 ptsIf 0.86 mol of a substance has a mass of 52.10 g, what is its molar mass?Give your answer in g mol-1 and to two decimal places. Flag question: Question 4Question 4Tips1 ptsWhat is the percentage yield (no decimals in answer) where you obtained 16.6 grams from a reaction in which the theoretical yield was 25 g? Flag question: Question 5Question 5Tips2 ptsYou dissolve 8.18 g of sodium chloride in 500 mL of water, what is the molarity of sodium cations in the solution as moles per litre? Give your answer to two decimal places. Flag question: Question 6Question 6Tips1 ptsIf you obtained a percentage yield of 12.7% from a reaction where the theoretical yield was 84 g, what was the actual amount of material you obtained in grams?  Flag question: Question 7Question 72 ptsAs you move down a group (e.g. moving from Al to Ga), the number of electrons/filled orbitals means that the atomic radius of the atom  Flag question: Question 8Question 81 ptsFor the following reaction, which would be the limiting reagent?  2H2 +O2 --> 2H2O You add 0.225 mol of hydrogen gas (H2) and 0.125 mol of oxygen gas (O2)Group of answer choicesWater (H2O)Hydrogen Peroxide (H2O2)Hydrogen Gas (H2)Oxygen Gas (O2)

Determine the number of moles of O in 5.27 g Mg(OH)2, given the following molar masses:  (Mg: 24.31 g/mole; O: 16.00 g/mole; H: 1.01 g/mole).

What is the mass of 0.022 mol of H2O?Give your answer in grams and to three decimal places.(Molar mass of H2O = 18.01 g mol-1)

100 ml of a saturated solution of Mg(OH)2 contains 8.2  10-4 g solute. Mol. wt. of Mg(OH)2 is 58.3 g mole-1; calculate its Ksp.

How many moles of H+ are there in 1.980 g of H2SO4?Give your answer in moles and to three decimal places.(Molar mass of H2SO4 = 98.08 g mol−1)