SCIENTIFIC NOTATION
Write 0.00907 in scientific notation.
9.07 × 10⁻³
Convert 1250 m to km with correct sig figs.
1.25 km
What particle in an atom has a positive charge?
The proton
Convert 450 mg to grams using correct unit setup.
0.450 g
A sample has a mass of 12.0 g and a volume of 4.00 mL. What is the density?
3.00 g/mL
What is the place value of the 2 in 0.0927?
Thousandths place
Which conversion is NOT correct:
0.75 m = 7500 mm, 1.0 cm = 10 mm, 1.0 m = 100 cm, 1000 m = 1.0 km?
0.75 m = 7500 mm (this is incorrect)
How many zeros are significant in 0.004560?
3
Simplify:
12 m/3 s
4 m/s
A metal cube has a density of 7.9 g/cm³. If the cube’s volume is 2.0 cm³, what is the mass?
15.8 g
Write 72,000 in scientific notation.
7.2 × 10⁴
Convert 4500 mL to liters.
4.50 L
Solve with correct sig figs:
(0.00456 + 0.00311)(8.20) ÷ 2.0
0.031
Convert 2.5 hours to minutes.
150 minutes
A bottle holds 750 mL of liquid. How many liters is that?
0.750 L
Write 0.00035 in scientific notation.
3.5 × 10⁻⁴
Round 305.2 m to the nearest whole meter.
305 m
How many significant figures are in the number 45.47?
4
Convert 0.00085 g to micrograms.
850 µg
A car travels 120 miles in 2.0 hours. What is the speed in miles per hour?
60 mph
Solve and express in scientific notation: (4.2×10⁻³)(1.0×10⁻¹)
4.2 × 10⁻⁴
Convert 0.00345 g to the correct prefix.
3.45 mg
Solve with correct significant figures:
(6.25×103)÷(2.5)
2.5×103
Convert 3.2 km to centimeters.
320,000 cm
A substance costs 4.50 USD per kilogram. What is the price per gram?
0.0045 USD/g