Which applies to the following: the density of copper metal is 8,96 grams/mL.
- a physical change.
- a physical property.
- a chemical change.
a physical property.
Which applies to the following: the boiling point of water is 100 degrees C.
- a physical change.
- a physical property.
- a chemical change.
a physical property.
Which applies to the following: Iron metal rusts.
- a physical change.
- a physical property.
- a chemical change.
a chemical change.
How many significant figures does the number 500. contain?
- 3
- 1
- 5
- 4
- 2
3
How many significant figures does the number 0.0250 contain?
- 1
- 5
- 4
- 3
- 2
3
How many significant figures does the number 1.2500x10^7 contain?
- 1
- 4
- 6
- 7
- 3
- 2
- 5
5
Ex. 12,500,000
How many significant figures does the number 60 seconds/minute?
- 1
- 3
- 2
- 4
- infinite
- 5
infinite
What is 26.33 + 3 + 5.345 = ?
Report your answer with the correct number of significant figures.
- 34.68
- 35
- 34.675
- 34
- 34.7
= 34.675 -> = 35 (2 sig figs)
What is 98.8 + 1 = ?
Report your answer with the correct number of significant figures.
- 99.8
- 100.
- 100.0
- 100
100.
Ex.
100. => 3 significant figures
100 => 1 significant figure
What is 2.350 x 3.2 = ?
Report your answer with the correct number of significant figures.
- 7.52
- 7.520
- 7.5
- 8
7.5 (2 sig figs)
What is 3000/10.0 = ?
Report your answer with the correct number of significant figures.
- 3.0x10^2
- 300
- 300.0
- 300.
- 300.00
300 (1 sig fig)
What is 134.34 - 10.2 + 8.431 = ?
Report your answer with the correct number of significant figures.
- 132.57
- 132.571
- 133
- 132.5
- 132.6
132.6 (4 sig figs)
Convert 600 nanometers to meters
1 m = 1x109 nanometers
Enter your answer in decimal format
Note: When graded the computer may not show the correct number of significant figures in the answer but you should still report the correct number of significant figures in your answer.
0.0000006 m
Convert 0.0064 kilometers to to centimeters.
1 km = 1000 m
1 m = 100 cm
640 cm
Convert 115.0 gallons per hour to liters per minute. Do not type units with your answer.
1 gallon = 3.785 liters
1 hour = 60 minutes
7.225
If you are driving on the highway at a speed of 26.0 miles/hour how fast are you traveling in meters/second?
1 mile = 5,280 feet
1 foot = 12 inches
1 in = 2.54 cm
1 m = 100 cm
1 hour = 60 minute
1 minute = 60 second
Do not type your units for this problem
11.6
Convert 6.50 g/mL to pounds/gallon
453.59 g = 1 pound
3.785 L = 1 gallon
Do not type units with your answer.
54.2
Convert 58 degrees Fahrenheit to Celsius. Do not type units with your answer.
Temperature in Celsius = (Temperature in Fahrenheit minus 32) times 5 divided by 9
14
Convert 56 degrees Celsius to Fahrenheit. Do not type units with your answer.
Temperature in Fahrenheit = 1.8 times Temperature in Celsius + 32
133
Convert 328 Kelvin to Celsius. Do not type units with your answer.
Temperature in Celsius = Temperature in Kelvin - 273
55.0
An unknown liquid has a density of 1.20 g/mL and a volume of 6.40 mL. What is the mass of the liquid?
7.68
An irregularly shaped solid weighing 13.34 grams is immersed in water. The water level changes from 15.5 mL without the solid to 26.2 mL after the solid is added. Find the density.
Do not type units in your answer.
1.2