Significant Figures and Scientific Notation Test

Question 1

How many significant figures are in the following values?
a. 4.02 x 10^-9
b. 0.008320
c. 6 x 10⁵
d. 100.0

Question 2

How many significant figures are in the following values?
a. 1200.0
b. 8.00
c. 22.76 x 10^-3
d. 731.2204

Question 3

Which value has more significant figures?
2.63 x 10^-6 or 0.0000026

Question 4

Express 4,610,000 in scientific notation.
a. with 1 significant figure
b. with 2 significant figures
c. with 3 significant figures
d. with 5 significant figures

Question 5

Express 0.0003711 in scientific notation.
a. with 1 significant figure
b. with 2 significant figures
c. with 3 significant figures
d. with 4 significant figures

Question 6

Perform the calculation with the correct number of significant digits.
22.81 + 2.2457

Question 7

Perform the calculation with the correct number of significant digits.
815.991 x 324.6

Question 8

Perform the calculation with the correct number of significant digits.
3.2215 + 1.67 + 2.3

Question 9

Perform the calculation with the correct number of significant digits.
8.442 - 8.429

Question 10

Perform the calculation with the correct number of significant digits.
27/3.45

Answers

1. a. 3   b. 4   c. 1   d. 4
2. a. 5   b. 3   c. 4   d. 7
3. 2.63 x 10^-6
4. a. 5 x 10⁶   b. 4.5 x 10⁶   c. 4.61 x 10⁶   d. 4.6100 x 10⁶
5. a. 4 x 10^-4   b. 3.7 x 10^-4   c. 3.71 x 10^-4   d. 3.711 x 10^-4
6. 25.06
7. 2.649 x 10⁵
8. 7.2
9. 0.013
10. 7.8

 

Chemistry Question of the Day

At standard temperature and pressure, all of the following compounds exist in gas state EXCEPT

1. HCl
2. HBr
3. NH3
4. BH3
5. LiH

Chemistry Question of the Day

A hydrocarbon is burned in oxygen and the ratio of moles of carbon dioxides to the moles of water obtained is 2:1. Find the hydrocarbon if it has 2 main resonance structures.

1. CH4
2. C2H4
3. C2H2
4. C6H6
5. None of the above.