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mole ratio
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molecular weight
balancing chemical equations
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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)