WorksheetsChemistry Unit #1 Exam
Total questions: 24
Worksheet time: 24mins
How many milligrams are in 4 kg?
4 × 10^6 mg
40 mg
4 × 10^–4 mg
4 × 10^2 mg
The number of seconds in a 30-hour work week would be:
108,000 seconds
0.008333 seconds
1800 seconds
43200 seconds
What is the volume of 75.0 g of benzene if the density of benzene is 0.85 g/mL?
88 mL
0.011 mL
0.028 mL
64 mL
A temperature of 25 ℃ is equivalent to how many Kelvin?
248 K
273 K
298 K
225 K
A sample of concentrated sulfuric acid has a density of 1.84 g/mL. What is the mass, in grams, of 1500 milliliters of this acid?
2.76 × 10^3 g
2.76 g
8.15 × 10^–4 g
1.23 g
A student records the mass of a sample as 52 g, but the true mass is 50 g. What is the percent error?
4.0%
2.0%
0.4%
5.2%
The number of significant figures in 0.004560 is:
4
3
5
6
The number of significant figures in value 0.00452 is:
2
3
4
5
How many significant figures are there in 0.056700?
3
4
5
6
The length of a metal rod is measured as 12.4863 cm. Round this value to 4 significant figures.
12.49
12.48
12.47
12.50
A rectangular aquarium at a school has the dimensions 7.5 cm, 9.3 cm, and 10.4 cm. The volume of water (in cm³) that can be stored in the aquarium (correct up to four significant figures) is
724.5
726.6
725.4
728.2
catalyst
What type of change takes place when magnesium reacts with oxygen to form magnesium oxide?
a physical change
a change of state
a change in mass
a chemical change
What is the correct scientific notation for 0.00000567?
5.67 x 10^-6
5.67 x 10^6
5.67 x 10^-7
5.67
What is the correct number for 4.7 X 10^-12?
0.0000000000047
0.000000000047
4700000000000
47000000000000
If someone spends 8 hours per day on a project, how many days would it take to complete 960 hours?
100 days
120 days
110 days
130 days
Convert 80 miles per hour to feet per second.
117 feet/second
88 feet/second
65 feet/second
120 feet/second
A block of Lead with a mass of 50.0 grams will occupy what volume?
4.41 mL
0.567 mL
5.67 mL
441 mL
What is the volume occupied by 50.0 grams of Hydrogen gas at standard temperature and pressure (STP)?
4.2 x 10^-7 mL
4.2 x 10^-3 mL
5.95 x 10^2 mL
5.95 x 10^5 mL
A solid sample has a mass of 51 grams and causes the water level in a graduated cylinder to rise by 5 mL. Which metal is the sample most likely to be?
Silver
Lead
Copper
Iron
A chemical reaction requires 92.45 grams of liquid ethanol. What volume should be dispensed?
0.0085 L
72.57 mL
117.78 mL
80.37 mL
Plasma
