Stoichhhhiometry
Kiss my mass
Big 'ol mass
No Sassy Mass
zzzzStorks Massive Stoich
100
How many moles of Al atoms are needed to combine with 1.58 mol of O2 to make aluminum oxide, Al2O3? 4Al + 3O2 --> 2Al2O3
What is 2.11 mol Al?
100
Find the formula mass for NaCl.
What is 58.3?
100
How many moles H2O are produced when 4.0 moles of O2 are consumed. 2C2H6(g) + 7O2(g) --> 4CO2(g) + 6H2O(g)
4 mols O2 x (6 mols H2O/7 mols O2) = 3.4 mols H2O
100
The study of relationships between measurable quantities.
What is stoichiometry?
100
How many moles are present in 45.0 liters.
What is 2.01 moles?
200
How many moles of lithium hydroxide are required to react with 12.5 moles of carbon dioxide? CO2 + 2LiOH --> Li2CO3 + H2O
12.5 moles CO2 x (2 moles LiOH/1 mole CO2) 25 moles LiOH
200
If 27.0 g of calcium carbide are used up in this reaction, how many moles of C2H2 would be formed?. CaC2 +2H2O --> C2H2 + Ca(OH)
27.0 g CaC2 x (1 mol CaC2/64 g CaC2) x (1 mol C2H2/1 mol CaC2) = 0.42 mol C2H2
200
How many moles of butane are required to produce 20.0 grams of H2O. 2C2H6(g) = 7O2(g) --> 4CO2(g) = 6H2O(g)
20 grams H2O x (1 mol H2O/ 18 g H2O) x (2 mols c2h6/6 mols H2O) = 0.37 mols butane
200
The number of things in one mole of a substance.
What is Avogadro number?
300
How many moles of sodium atoms correspond to 1.56x1021 atoms of sodium?
What is 2.59x10-3mol Na atoms?
300
How many moles of CO2 would be formed when 76.2 g of acetylene (C2H2) burns completely? 2C2H2 +5O2 --> 4CO2 + 2H2O
76.2 g c2h2 x (1 mol c2h2/26 g c2h2) x (5 mols CO2/2 mols C2H2) = 7.3 mols of CO2
300
How many grams of H2 are needed to completely react with 2.5 mol NH2. H2 + 2NH2 --> 2NH3
2.5 mol NH2 x (1 mol H2/2 mol NH2) x (2 g H2/1 mol H2) = 2.5 grams NH2
400
If 27.0 g of calcium carbide are used up in this reaction, how many moles of water are needed? CaC2 + 2H2O --> C2H2 + Ca(OH)
27.0 g CaC2 x (1 mole CaC2/64 g CaC2) x (2 moles H2O/1 mole CaC2) = 0.84 moles H2O
400
How many moles of H2O are formed when Shayla burns 76.2 g of acetylene? 2C2H2 + 5O2 --> 4CO2 +2H2O
76.2 g of acetylene x (1 mol acetylene/ 26 g acetylene) x (2 mols H2O/2 mols acetylene) = 2.93 mols H2O
400
How many moles of water are needed to react with 105 g of aluminum carbide? Al4C3 + 12H2O -->3CH4 + 4Al(OH)
105 g Al4C3 x (1 mol al4c3/144 g al4c3) x (12 mols H2O/1 mol al4c3) = 8.75 mols H2O
400
The mass of one mole of a pure substance.
What is molar mass?
500
How many moles of H2 and N2 can be formed by the decomposition of 0.145 mol of ammonia, NH3?
0.0725mol N2 and 0.218mol 2NH3 --> 3H2 + N2 0.145 mol NH3 x (3 mol H2/2 mol NH3) = .218 mol H2 0.145 mol NH3 x (1 mol N2/2 mol NH3) = 0.0725 mol N2
500
How many grams of O2 are needed to react with the 76.2 g of acetylene that Micah burns?
76.2 g acetylene x (1 mol acetylene/26 grams acetylene) x (5 mol O2/2 mol acetylene) x (32 g oxygen/1 mol oxygen) = 234 g of O2
500
How many moles of O2 are needed to react with 500 grams of C2H6. 2C2H6(g) + 7O2(g) --> 4CO2(g) + 6H2O(g)
500 g C2H6 x (1 mol C2H6/ 30 g C2H6) x (7 mol O2/2 mol C2H6) = 58 mol O2
500
The unit used to count numbers of atoms, molecules, or formula unit substances.
What is mole?
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