WorksheetsReview Exam #1
Total questions: 26
Worksheet time: 13mins
Which of the following is NOT a chemical?
water
silicon dioxide
sound
oxygen
Write the correct scientific notation for 0.0005 cm.
5 x 10^-3 cm
5 x 10^-4 cm
5 x 10^-5 cm
5 x 10^-3 cm
Which of the following numbers is the largest?
4.3 x 10-3 cm
1.5 x 10-4 cm
2.0 x 10-5 cm
2.0 x 10-6 cm
A 150 gram gold nugget contains 2.5 grams of gold. What is the percentage of gold in the nugget?
2.5%
1.3%
1.6%
5.0%
Which of the following units is NOT used as a standard
SI unit?
meter (m)
liter (L)
kelvin (K)
seconds (s)
What is the correct unit for mass in the metric system?
pound
kilogram
gram
milligram
Which of the following is NOT a measured number?
38 seconds
456 g
14.2 kg
72 students
Write the correct scientific notation for 0.004 cm using significant figures.
4.000 x 10^−3 cm
4 x 10^−3 cm
4.0 x 10^−5 cm
4.0 x 10^3 cm
What is the number of significant figures in 0.0250 kg?
4
3
2
1
How many significant figures are in the sum of these numbers? 4.59 cm + 8.113
3
5
4
2
Which of the following prefixes decreases the size of
the unit?
deci
kilo
giga
mega
A car was clocked at a speed of 65.0 mi/h. What is the car’s speed in meters/second (m/s)?
11.2 m/s
673 m/s
29.1 m/s
377 m/s
The density of octane, a component of gasoline, is
0.702 g/mL. What is the mass, in kg, of 875 mL of octane?
12.5 kg
614 kg
1.25 kg
0.614 kg
In a process called liposuction, a physician removes adipose tissue from a person’s body. If body fat has a density of 0.94 g/mL and 3.0 L of fat are removed, how many pounds of fat were removed from the patient?
2.8 lb
4.6 lb
6.2 lb
8.1 lb
A patient needs 0.024 g of a sulfa drug. There are 8.0-mg tablets in stock. How many tablets should be given?
eight tablets
six tablets
four tablets
three tablets
Which of the following is a homogeneous mixture?
a cup of hot tea
tea with ice and water
vegetable soup
chocolate chip ice cream
Which of the following is an example of a chemical change?
Snow melts to form liquid water.
Dry ice (CO2) vaporizes.
Rust forms on a car.
A chocolate bar melts.
While overseas, your friend gets sick and has a temperature of 38.5 °C. What is this in degrees Fahrenheit?
53.4 °F
69.3 °F
101.3 °F
98.6 °F
One cup of clam chowder contains 9.0 g of protein, 12.0 g of fat, and 16.0 g of carbohydrates. How many kilocalories are in the clam chowder?
105 kcal
208 kcal
315 kcal
420 kcal
Which of the following is a pure substance?
sugar (C12H22O11)
soft drink
sea water
milk
A patient with heat stroke has a temperature of 106.0 °F. What does this read on a Celsius thermometer?
39.1 °C
40.1 °C
C.41.1 °C
C.42.1 °C
Which of the following cannot be described as a
physical change?
meat cooks on a grill
sugar is dissolved in water
ice melts
water evaporates
What is the total energy value in kcal for a serving of salmon if it contains 22 g of fat and 39 g of protein?
439 kcal
360 kcal
160 kcal
198 kcal
A layer of copper on a pan has a mass of 135 g. How much heat, in kilojoules, will raise the temperature of the copper from 26 °C to 328 °C if the specific heat of copper is 0.385 J/g °C?
302 kJ
17.0 kJ
16.0 kJ
15.7 kJ
How many kilojoules are released when 25.0 g of water
at 0 °C freezes?
0.335 kJ
334 kJ
8.35 kJ
8350 kJ
How many kJ are needed to raise the temperature of
325 g of water from 15.0 °C to 77.0 °C?
20.4 kJ
77.7 kJ
84.3 kJ
125 kJ
