Chem CH4
If 350 g of carbon monoxide is mixed with 125 g of hydrogen gas to produce methanol according to the following equation CO(g) + 2H2(g) CH4O(l) How many moles of excess reactant are consumed? (a) 2 mol H2 consumed (b) 12.5 mol CO consumed (c) 1 mol CO consumed (d) 1 mol CH4O consumed (e) 25.0 mol H2 consumed
(e) 25.0 mol H2 consumed
What is the mass in grams of 1.56 moles of aspartame.
1.0 x 1019 molecules
Write the letter and only the letter that best answers the question. How many moles of carbon dioxide are there in 52.06 g of carbon dioxide?
1.183
What is the molar mass (in g/mol) of aspartame?
294.305 g/mol
Balance this chemical equation __ CaO(s) + ___ C(s) ___ CaC2(s) + ___ CO2(g)
2CaO(s) + 5C(s) 2CaC2(s) + CO2(g)
Balance this chemical equation __KO2(s) + __H2O(l) __KOH(aq) + __ O2(g) + __H2O2(aq)
2KO2(s) + 2H2O(l) 2KOH(aq) + O2(g) + H2O2(aq)
What are the number of moles present in 10.0-g aspartame?
3.34 x 10-2 mol
What is the mass in grams of 1 molecule of aspartame?
4.9 x 10-22 g
Balance this chemical equation ___ NH3(g) + ___ O2(g) ___ NO(g) + ___ H2O(g)
4NH3(g) + 5O2(g) 4NO(g) + 6H2O(g)
Write the letter and only the letter that best fills in the blank below. There are __________ atoms of oxygen are in 300 molecules of CH3CO2H
600
1.What is the percent yield of the reaction if 2.15 grams of ammonia are obtained from the the reaction of 20.0 g of nitrogen trichloride? Theoretical yield of NH3: 2.83 g A. 100% B. 76% C. 10% D. 131 %
B 76%
If the percent yield of the reaction is 95%. How many grams of NH3 are produced from 20.0g of NCl3? Theoretical yield is 2.83 g A. 20.0 g B. 2.83 g C. 2.15 g D. 2.69 g E. None of the above
B. 2.83
formula for acetate
C2 H3 O2
formula for carbonate
CO3 (2)
What is the correct name for Ba(OH)2? A.barium(II) hydroxide B.barium dihydroxide C.barium dioxide D.barium hydroxide E.barium oxide Q 4 Nomenclature
D.barium hydroxide
MORE PRACTICE: What is the mass of silver metal produced from 6.35 g of copper? Cu (s) + 2 AgNO3(aq) Cu(NO3)2 (aq)+ 2 Ag (s) Molar Mass: Cu = 63.546 g/mol and Ag = 107.87 g/mol a)0.187 g b)0.540 g c)0.747 g d)1.08 g e)21.6 g
E21.6g 1. Balanced Equation? Yes 2. Determine molar mass of Cu and Ag 2. Convert 6.35 g of Cu into moles 0.10 moles Cu 2. Convert moles of Cu into moles Ag (1 mole Cu ~ 2 moles Ag) 0.20 mole Ag • 5. Convert moles of Ag to grams ) 63.546 1 6.35 ( gCu moleCu gCu ) 1 2 0.10 ( moleCu molesAg moleCu ) 1 107.87 0.20 ( moleAg gAg moleAg 21.6 g Ag Notes Tuesday 9/12
Balance this chemical equation __ Fe2O3(s) + __ HNO3(aq) __ Fe(NO3)3(aq) + __ H2O(l)
Fe2O3(s) + 6HNO3(aq) 2Fe(NO3)3(aq) + 3H2O(l)
Balance this chemical equation ___ FeCO3(s) + ___ H2CO3(aq) ___ Fe(HCO3)2(aq)
FeCO3(s) + H2CO3(aq) Fe(HCO3)2(aq)
Enter the letter that best answers the question Give the formula for sulfurous acid
H2SO3
What is the correct formula for iron(III) oxide? Q 3 Nomenclature
Iron(III) oxide = Fe2O3
Mass of Reactants =
Mass of Products
Stoichiometry:
Mole-mass relationships in chemical equations
What is the correct formula for ammonium perchlorate?
NH4ClO4
Law of conservation of mass: Number of Atoms in Reactants =
Number of Atoms in Products
Balance this chemical equation ___ PCl5(l) + ___ H2O(l) ___ H3PO4(aq) + ___ HCl(g)
PCl5(l) + 4H2O(l) H3PO4(aq) + 5HCl(g
Law of conservation of mass: Count atoms of each type in the reactants and in the products! Remember:
Same number of atoms of each type before and after the reaction
Limiting Reactants:
The extent to which a reaction takes place depends on the reactant that is present in limiting amounts
What is the correct name of AlBr3? A.aluminum bromide B.aluminum tribromide C.aluminum(I) bromide D.aluminum(III) bromide E.monoaluminumtribromide Q 2 Nomenclature
aluminum bromide
Balancing equations:A coefficient applies to the entire __________!.A subscript applies to the preceding ___________!
compound! element!
What is the correct name for N2O5? .
dinitrogenpentoxide