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- 1. Multiple Choice
The mass of a tungsten atom is 2.4 times greater than the mass of a neon atom. What is the relative atomic mass of tungsten?
[RAM: Ne, 20]
8
22
48
52
- 2. Multiple Choice
How many oxygen atoms have equal mass with two magnesium atoms?
[RAM: O, 16; Mg, 24]
2
3
4
5
- 3. Multiple Choice
Four atoms of element X have the same mass with 11 atoms of sulphur. What is the relative atomic mass of element X?
[RAM: S, 32]
44
88
128
352
- 4. Multiple Choice
An oxide of nitrogen has the formula, N2O4. What is its relative molecular mass?
[RAM: N, 14; O, 16]
76
78
92
120
- 5. Multiple Choice
How many times is a water molecule heavier than a hydrogen molecule?
[RAM: H, 1; O, 16]
2
8
9
18
- 6. Multiple Choice
Sodium thiosulphate has the formula of Na2S2O3 . 5H2O. What is its relative formula mass?
[RAM: H, 1; O, 16; Na, 23; S, 32]
158
232
248
264
- 7. Multiple Choice
Silica gel contains a sodium compound with the formula Na2Si4Oy. If the relative formula mass of the compound is 302, what is the value of y?
[RAM: O, 16; Na, 23; Si, 28]
8
9
10
12
- 8. Multiple Choice
The average mass of nitrogen gas is 28 times greater than that of the mass of 1/12 carbon-12 atom. Calculate the relative atomic mass of nitrogen.
1
2
14
28
- 9. Multiple Choice
The relative molecular mass of substance PR2 is 95. If the relative atomic mass of an element of atom R is 35.5, calculate the relative atomic mass of an atom of element P.
8
24
16
64
- 10. Multiple Choice
An oxide of element Q has a formula Q3O4 and relative formula mass of 145. Calculate the relative atomic mass of element Q.
[RAM: O = 16]
18
27
44
50
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