Calculate 923 g ÷ 20312 cm3 and give your answer with the appropriate number of significant figures.
a)
0.04 g/cm3
b)
0.045 g/cm3
c)
0.0454 g/cm3
d)
4 x 10-2 g/cm3
4.
12.03 + 43.5 = ?
Express your answer to the correct place value.
a)
55.530
b)
55.53
c)
55.5
d)
56
5.
Express 500,000 to two significant figures.
a)
50.
b)
5.0
c)
50. x 104
d)
50. x 105
e)
5.0 x 105
6.
How many significant figures will be in the answer to the following question: 7.62 x 6.98 x 3.2645
a)
1
b)
2
c)
3
d)
4
7.
Samples with masses of 0.12 g, 1.8 g, and 0.562 g are mixed together. The combined mass of the three samples, expressed to the correct number of significant figures, should be recorded as
a)
2.4 g.
b)
2.48 g.
c)
2.482 g.
d)
2.5 g.
8.
The dimensions of rectangular solid are measured to be 1.27 cm, 1.3 cm, and 2.5 cm. The volume should be recorded as
a)
4.128 cm3.
b)
4.12 cm3.
c)
4.13 cm3.
d)
4.1 cm3.
9.
When performing the calculation 34.530 g + 12.1 g + 1222.34 g the final answer must have
a)
Three significant figures
b)
One decimal place
c)
Two decimal places
d)
Three decimal places
10.
If you have a number in scientific notation with a negative exponent, what does this tell you?
a)
You have a negative number
b)
You have a very large number
c)
Nothing
d)
You have a very small number
11.
When multiplying two numbers in scientific notation, what do you do with the exponents?
a)
Add them
b)
Subtract them
c)
Multiply them
d)
Leave them alone
12.
When subtracting two numbers in scientific notation, what do you do with the exponent?
a)
Leave them alone
b)
Leave them alone (But only if they match)
c)
Subtract them
d)
Add them
13.
When dividing two numbers in scientific notation, what do you do with the exponents?
a)
Add them
b)
Subtract them
c)
Multiply them
d)
Leave them alone
14.
Complete the operation:
(6 x 10^5) X (1 x 10^10)
a)
7 x 10^15
b)
6 x 10^-5
c)
6 x 10^15
d)
6 x 10^50
15.
Complete the operation:
(4 x 10^3) + (8 x 10^3)
a)
1.2 x 10^4
b)
1.2 x 10^3
c)
12 x 10^3
d)
12 x 10^4
16.
Complete the operation:
(8 x 10^-3) / (4 x 10^-8)
a)
2 x 10^-11
b)
2 x 10^-5
c)
2 x 10^5
d)
2 x 10^11
17.
How do you write the number 0.000023 in scientific notation?
a)
2.3 x 10^5
b)
2.3 x 10^-5
c)
23 x 10^4
d)
23 x 10^-4
18.
Convert this number to standard notation:
7.1 x 104
(a)
19.
Divide (7.78 x 10 ^8) / (9.67 x 10 ^-9) and express in scientific notations.
a)
8.05 x 10 ^16
b)
8.04 x 10 ^15
c)
8.046 x 10 ^15
d)
8.06 x 10 ^16
20.
Multiply (2.45 x 10 ^4) x (8.78 x 10 ^6) and express in scientific notations.