Conversions
567cm converted to mm.
5,670mm
write 3.4 x 104 in standard notation
34,000
A chemist calculates the mass of a sample to be 25.2 grams. If the true mass is 24.8 grams, what is the percentage error?
1.61%
How many sig figs are in: 456.01
What is the formula for density?
M / V
Mass divided by Volume
87L converted to mL
87,000mL
Add (3.6 x 103) + (2.9 x 103)
6.5 x 103
A physicist measures the acceleration due to gravity as 9.81 m/s². If the accepted value is 9.80 m/s², find the percentage error.
1.02%
How many digits are significant in: 0.00450
3 (450)
John filled a graduated cylinder with 20mL of water. He dropped a coin into the cylinder and the water level went to 24mL. What is the volume of his coin?
4mL
8,875cm converted to meters
88.75m
(8.93 x 105) - (10.5 x 105)
-1.57 x 105
A manufacturer claims that a product weighs 50 kg, but it actually weighs 49 kg. What is the percentage error?
2%
How many digits are significant in: 34,000,000
2 (34)
Xavier found the mass of a marker to be 34.5g, and its volume was 10.3cm3. What is the density of the marker?
YOU MUST INCLUDE UNITS
3.45g/cm3
5,432cm converted to km
0.05432km
Arrange these in order from least (top) to greatest (bottom)
7.4 x 104
5.4 x 106
8.45 x 10-2
6.3 x 10-5
Least = 6.3 x 10-5
second = 8.45 x 10-2
third= 7.4 x 104
greatest = 5.4 x 106
An astronomer measures a star's distance to be 150 light-years, but the actual distance is 145 light-years. Calculate the percentage error.
3.45%
Add 54.35, 3.4, and 67.89. Round your answer with the correct number of significant figures.
Remember: this problem is focused on the decimal places!
125.6
If a substance has a mass of 50g and a volume of 100mL, will it sink or float in water?
It will float because it's density is 0.5g/mL, which is less dense than water (1.0g/mL)
4.93876km converted to mm.
4,938,760mm
Multiply (4.5 x 107) x (9 x 103)
(40.5 x 1010) OR (4.05 x 1011)
An engineer finds the length of a metal rod to be 45.3 cm, while the standard length is 45.0 cm. Calculate the percentage error
0.67%
Multiply 4.5 x 1.35. Round your answer to the correct number of sig figs.
Remember: multiplication and division focus on the total number of sig figs in the problem.
6.1
Arrange these objects in order as if they were in a density column. (Least at the top, most at the bottom).
Object A = 45g, 20mL
Object B = 20g, 10mL
Object C = 65g, 55mL