mole ratio
significant figures
molecular weight
balancing chemical equations
metric conversion
100
Aluminum metal and hydrogen chloride react to form aluminum chloride and hydrogen gas. How many moles of aluminum metal are needed to produce 3.33 moles of aluminum chloride?
2 Al + 6 HCl ---> 2 AlCl3 + 3 H2 3.33mol AlCl3 * (2mol Al / 2mol AlCl3) = 3.33mol Al
100
calculate 23.7 x 3.8
90.
100
Find the molar masses of the following compound Ca(OH)2
74.1g/mol
100
Balance this equation Nitrogen plus hydrogen produce ammonia. (Remember diatomic elements!)
N2 + 3H2 ---> 2NH3
100
Penny has a pencil that is 19 cm long. How long the pencil in inches?
7.48 in (19 x .3937)
200
4 AlF3 + 3 O2 ---> 2 Al2O3 + 6 F2 20 moles of AlF3 will produce _____ moles of F2
20mol AlF3 * (6mol F2 / 4mol AlF3) = 30mol F2
200
What is 28.367 / 3.74
7.58
200
What is molecular weight of AgF?
126.9g/mol
200
Balance the following ____ C3H8 + ____ O2 ---> ____ CO2 + ____ H2O
1 C3H8 + 5 O2 ---> 3 CO2 + 4 H2O
200
What is 8800 yd = _____ mi
5 mi
300
Reaction of iron metal and oxygen yield iron (III) oxide. Calculate the number of moles of Oxygen required to produce 3.0moles of iron (III) oxide
4 Fe + 3 O2 ---> 2 Fe2O3 3.0mol Fe2O3 * (3mol O2 / 2mol Fe2O3) = 4.5 mol O2
300
What is 32.567 + 135.0 + 1.4567
169.0
300
What is the molar mass of Na3PO4
164.0g/mol
300
Balance __Mg(NO3)2 + __K3PO4 ---> __Mg3(PO4)2 + __KNO3
3 Mg(NO3)2 + 2 K3PO4 ---> 1 Mg3(PO4)2 + 6 KNO3
300
What is 15840 ft = _____ mi
3 mi
400
Methane gas (carbon tetrahydride) reacts with oxygen by combustion. How many moles of oxygen are needed to react to form the 3.5 X 10-4 moles of carbon dioxide?
CH4 + 2 O2 ---> CO2 + 2 H2O 3.5 X 10-4mol CO2 * (2mol O2 / 1mol CO2) = 7.0 *10-4mol
400
How many significant figures are in 320001
6
400
What is the molecular weight of Fe3(PO4)2
357.4g/mol
400
Aluminum bromide plus chlorine yield aluminum chloride and bromine.
2 AlBr3 + 3 Cl2 ---> 2 AlCl3 + 3 Br2
400
The distance between Happyville and Giggleland is 60 miles. How far is this in kilometers?
96.54 km (60 x 1.609)
500
Aluminum bromide and sodium hydroxide react to form aluminum hydroxide and sodium bromide How many moles of aluminum hydroxide may be formed from 4.65 moles of sodium hydroxide?
AlBr3 + 3 NaOH ---> Al(OH)3 + 3 NaBr 4.65mol NaOH * (1mol Al(OH)3 / 3mol NaOH) = 1.55mol AL(OH)3
500
What is 658.0 + 23.5478 + 1345.29
2026.8
500
What is the molar mass of Zn(C2H3O2)2
183.4g/mol
500
Zinc reacts with iron(III) chloride yielding zinc chloride plus iron.
3 Zn + 2 FeCl3 ---> 3 ZnCl2 + 2 Fe
500
Macho Mel can lift 200 kilograms with ease. How much is this in pounds?
440.92 lbs (200 x 2.2046)
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