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Stoichiometry (Moles And Grams)
Test Description: A review of: molecular mass counting atoms types of reactions balancing equations mole ratios converting moles to grams and grams to moles
Instructions: Answer all questions to get your test result.
1) Burning anything is what type of reaction?
A
combustion
B
acid base
C
single displacement
D
decomposition
2) How many atoms of Hydrogen are in the following compound: C6H5NH2
A
2
B
10
C
5
D
7
3) What is the molecular mass for Carbon
A
1.0079
B
15.994
C
22.9494
D
12.0111
4) What is the molecular mass for NH4?
A
60.0408
B
18.0383
C
22.9087
D
12.011
5) How many moles of Carbon in 3.4g
A
0.542 mol
B
0.283 mol
C
12.011 mol
D
40.84 mol
6) How many grams in 5.00mol CaCl2?
A
554.9g CaCl2
B
526.7g CaCl2
C
1.078g CaCl2
D
0.045g CaCl2
7) What is the molecular weight of sugar? C12H22O11
A
362.2g/mol
B
312.8g/mol
C
29.013g/mol
D
342.2 g/mol
8) How do you convert # particles to moles?
A
divide by avogadros #
B
multiply by avogadros #
C
divide by molar mass
D
divide by 22.4
9) What is the mole ratio of HCl to NaCl in the following reaction: Na2CO3(aq)+ 2HCl(aq) ®2NaCl(aq)+ H2CO3(aq)
A
1:2
B
2:1
C
1:1
D
2:2
10) What type of reaction is the following: H2SO3(aq) -- H2O(l) + SO2(g)
A
acid base
B
single displacement
C
decomposition
D
combustion
11) What is the molecular mass of nickel
A
58.69 L
B
58.69 g
C
58.69 g/mol
D
58.69 mol
12) How many litres will one mole of gas at STP take up?
A
Molecular mass
B
6.02x1023
C
avogadro's number
D
22.4L
13) Find the molecular weight of Manganese dioxide
A
70.932g/mol
B
86.927g/mol
C
112.896g/mol
D
125.87g/mol
14) Which type of reaction gives water and a salt as products always.
A
Synthesis
B
Acid base
C
Combustion
D
Double displacement
15) What day is Mole Day?
A
June 3rd
B
October 23
C
February 13
D
December 23
*select an answer for all questions
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