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- 1. Multiple Choice
How many significant figures are present in 0.0025
Two
Three
Four
Five
- 2. Multiple Choice
How many atoms of magnesium are present in 96u of Magnesium
0.25
25
4
0.4
- 3. Multiple Choice
The volume of 1.7g of NH3 at STP (273K, 1atm) is
1.7L
2.24L
2.8L
3.4L
- 4. Multiple Choice
Number of moles present in 22.0g of carbondioxide is
2
22
0.5
0.25
- 5. Multiple Choice
If the density of a solution is 4.5g/mL, the mass of 1.4mL solution in significant figure is
3.21g
4.5g
0.63g
6.3g
- 6. Fill in the Blank
The reactant which is entirely consumed when a reaction goes to completion is called
- 7. Multiple Choice
Which is more informative?
Empirical Formula
Molecular Formula
- 8. Multiple Choice
Mass percent of phosphorus in calcium phosphate is
38.71%
20%
41.29%
28%
- 9. Fill in the Blank
................ refers to the agreement of a particular value to the true value of the result.
- 10. Multiple Choice
Law of definite proportions states that equal volumes of all gases under similar conditions of pressure and temperature contain equal number of molecules.
True
False
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