MOLE-O!
M O L E
M–1 Question If your empirical formula is CH 3 and your molar mass is 45.0 g/mole, what is your molecular formula? Answer Answer
M-2 Question If your empirical formula is CH 2 and your molar mass is 28.0 g/mole, what is your molecular formula? Answer Answer
M-3 Question If your empirical formula is CH 2 O and your molar mass is g/mole, what is your molecular formula? Answer Answer
M-4 Question If your empirical formula is CH 3 and your molar mass is 60.0 g/mole, what is your molecular formula? Answer Answer
M-5 Question If your empirical formula is CH 2 and your molar mass is 42.0 g/mole, what is your molecular formula? Answer Answer
M-6 Question If your empirical formula is CH 2 O and your molar mass is g/mole, what is your molecular formula? Answer Answer
M-7 Question If your empirical formula is CH 3 and your molar mass is 30.0 g/mole, what is your molecular formula? Answer Answer
M-8 Question If your empirical formula is CH 2 O and your molar mass is 90.0 g/mole, what is your molecular formula? Answer Answer
O-1 Question What is the volume (in L) of 52.0 grams of NH 3 at STP? Answer Answer
O-2 Question How many formula units are contained in grams of potassium hydroxide? Answer Answer
O-3 Question You have 8.3 X 10 8 atoms of zinc. How many moles is this? Answer Answer
O-4 Question What is the molar mass of calcium nitrate? Answer Answer
O-5 Question What is the molar mass of copper (II) nitrate? Answer Answer
O-6 Question You have 264 grams of sodium hydroxide. How many moles is this? Answer Answer
O-7 Question You have 1.2 grams of sodium. How many atoms is this? Answer Answer
O-8 Question What is the volume (in L) of 4,260 atoms of Neon at STP? Answer Answer
O-9 Question What is the volume (in L) of grams of carbon dioxide at STP? Answer Answer
O-10 Question What is the mass (in grams) of moles of chromium (II) chloride? Answer Answer
O-11 Question What is the mass (in grams) of 1.74 X formula units of sodium hydroxide? Answer Answer
O-12 Question How many molecules are contained in 26 grams of water? Answer Answer
O-13 Question What is the mass of 3 atoms of helium? Answer Answer
O-14 Question What is the volume (in L) of grams of nitrogen dioxide at STP? Answer Answer
O-15 Question What is the mass of 3,720 molecules of O 2 gas? Answer Answer
O-16 Question What is the mass (in grams) of 263 L of dinitrogen pentoxide at STP? Answer Answer
L-1 Question A gram sample of hydrated copper (II) sulfate, CuSO 4 X H 2 O, is heated to remove all the water and produce grams of the anhydrous salt. What is the value of “X?” AnswerAnswer
L-2 Question What is the percent water in copper (II) nitrate trihydrate? Answer Answer
L-3 Question What is the percent water in nickel (II) chloride hexahydrate? Answer Answer
L-4 Question Hydrated calcium sulfate, CaSO 4 X H 2 O, contains 20.93% water. What is the value of “X?” Answer Answer
L-5 Question Borax powder has the formula Na 2 B 4 O 7 X H 2 O. When grams of the hydrate are heated and the water is removed, grams of anhydrous salt remain. What is the value of “X?”AnswerAnswer
L-6 Question What is the percent water in magnesium nitrate hexahydrate? Answer Answer
L-7 Question What is the percent water in barium chloride dihydrate? Answer Answer
L-8 Question If grams of epsom salt, MgSO 4 X H 2 O, is heat to remove all water, grams of salt remain. What is the value of “X?” Answer Answer
E-1 Question What is the percent lead in lead (II) chloride? Answer Answer
E-2 Question What is the percent potassium in potassium dichromate? Answer Answer
E-3 Question What is the empirical formula of a compound composed of 77.7% iron and 22.3% oxygen? Answer Answer
E-4 Question What is the empirical formula of a compound composed of 44.0% iron and 56.0% chlorine? Answer Answer
E-5 Question What is the empirical formula of a compound composed of 34.4% iron and 65.6% chlorine? Answer Answer
E-6 Question What is the percent sulfur in iron (II) sulfide? Answer Answer
E-7 Question What is the percent sodium in sodium sulfate? Answer Answer
E-8 Question What is the empirical formula of a compound composed of 69.9% iron and 30.1% oxygen? Answer Answer
M-1 Answer C3H9C3H9
M-2 Answer C2H4C2H4
M-3 Answer C 12 H 24 O 12
M-4 Answer C 4 H 12
M-5 Answer C3H6C3H6
M-6 Answer C 6 H 12 O 6
M-7 Answer C2H6C2H6
M-8 Answer C3H6O3C3H6O3
O-1 Answer 68.5 L NH 3
O-2 Answer 3.06 x formula units KOH
O-3 Answer 1.14 x moles Zn
O-4 Answer g/mole Ca(NO 3 ) 2
O-5 Answer g/mole Cu(NO 3 ) 2
O-6 Answer 6.6 moles NaOH
O-7 Answer 3.1 x atoms Na
O-8 Answer 1.59 x L Ne
O-9 Answer L CO 2
O-10 Answer 4.3 grams CrCl 2
O-11 Answer 1.16 x grams NaOH
O-12 Answer 8.7 x molecules H 2 O
O-13 Answer 1.99 x grams He
O-14 Answer 27.4 L NO 2
O-15 Answer 1.98 x grams O 2
O-16 Answer 1,268 grams N 2 O 5
L-1 Answer 22.4% H 2 O
L-2 Answer 22.4% H 2 O
L-3 Answer 45.4% H 2 O
L-4 Answer CaSO 42H 2 O
L-5 Answer Na 2 B 4 O 710H 2 O
L-6 Answer 42.1% H 2 O
L-7 Answer 14.7% H 2 O
L-8 Answer MgSO 47H 2 O
E-1 Answer 74.48% Pb
E-2 Answer 26.58% K
E-3 Answer FeO
E-4 Answer FeCl 2
E-5 Answer FeCl 3
E-6 Answer 36.52% S
E-7 Answer 32.37% Na
E-8 Answer Fe 2 O 3