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