Density
Scientific Notation
Conversion Factors
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Significant Figures
100
A 5ml sample of water has a mass of 5g. What is the density of water?
1g/ml
100
Express the number in scientific notation. 700
7 x 10 2
100
What conversion factors are needed to convert nanometers to meters?
1/1,000,000,000 or 10 -9
100
When you convert from a small unit to a large unit, what happens to the number of units?
It decreases.
100
Determine the number of significant figures in the measurement of 508.0 L 4
4
200
What is the volume of a sample that has a mass of 20 g and a density of 4 g/mL?
5 mL
200
Express the following number in scientific notation 0.000000076
7.6 x 10 -8
200
how many milliseconds are in a second?
1,000 millisecond in 1 second or 1/1000
200
How can you find the slope of a line graph?
slope = rise/run or slope = y2-y1/x2-x1
200
Determine the number of significant figures in each measurement 1.0200 x 10 5 kg
5
300
Define the SI units for length, mass, time, and temperature.
length: meter; mass: kilogram; time: second; temperature: kelvin
300
Express the quantity in regular notation along with its appropriate unit. 3.60 x 10 5 s
360,000 s
300
Convert 4800 g to kg.
4.8 kg
300
If you move the decimal place to the left to convert a number into scientific notation, will the power of ten be positive or negative?
positive
300
Round the number to four significant figures, and write the answer in scientific notation. 0.00054818 g
5.482 x 10 -4g
400
Why does oil float on water?
Oil floats on top of water because the density of oil is less than that of water.
400
Solve the problem and express the answer in scientific notation. a. (5 x 10 -5) + (2 x 10 -5)
7 x 10 -5
400
convert 78g to mg
78,000 mg
400
The accepted length of a steel pipe is 5.5 m. Calculate the percent error for this measurements: 5.2 m
5.5%
400
Add and subtract as indicated, and round when necessary. 258.3 kg + 257.11 kg + 253 kg
768 kg
500
Samples A, B, and C have masses of 80 g, 12 g, and 33 g and volumes of 20 mL, 4 cm3, and 11 mL, respectively. Which of the samples have the same density?
b and c
500
Solve the problem, and express the answer in (2 x 10 -4) x (3 x 10 2)
6 x 10 -2
500
How many seconds are in 24 h?
86,400 s
500
What advantages do SI units have over the units commonly used in the United States?
units based on powers of ten are easy to convert from one to another. To make it efficient to communicate accurate results throughout the whole world.
500
Round the number to four significant figures, and write the answer in scientific notation: 2.0145 mL
2.014 x 10 0 ml or 2.014 ml
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