Pure substances & Mixtures
Physical or Chemical
Significant Figures
Density
Dimensional Analysis
100
Which of the following is not a pure substance? Iron, Zinc, Sodium chloride, Sand
Sand
100
Which of the following is a physical change? burning paper grinding coffee beans digesting a pizza dying your hair
grinding coffee beans
100
How many significant figures are 210 cm?
What is 2
100
What are the units used when finding the density of a liquid?
What is grams per milliliter
100
How many decimeters are in 1 meter?
What is 10
200
Which of the following is/are examples of a mixture? Hydrogen chloride, Pure water, Silver, Air
Air
200
Which of the following is a chemical property? Density Flammability Color Melting point
Flammability
200
How many significant figures are in 0.00361?
What is 3
200
Calculate the density of mercury if 100 grams occupies a volume of 7.36 cubic centimeters?
What is 13.6 grams per cubic centimeters
200
Convert 16 centimeters to millimeters.
What is 160 mm
300
Can mixtures be separated physically or chemically?
physically
300
Which of the following is a chemical change? Boiling water Melting copper Burning paper Bending a wire
Burning paper
300
How many significant figures are in 95, 870 meters?
What is 4
300
Calculate the density of a 374.5 gram sample of copper if it has a volume of 41.8 cubic centimeters.
What is 8.96 grams per cubic centimeter
300
Convert 2500 g to kg.
What is 2.5 kg
400
How many homogeneous mixtures are listed below? Soda water Kool-aid Salt water Sand Salad Air
4
400
Is ice melting a physical or chemical change?
physical
400
How many significant figures are in 86,400 seconds?
What is 3
400
Calculate the volume of 65.0 g of the liquid methanol if its density is 0.791 grams per milliliter.
What is 82.2 milliliters
400
How many seconds are in 5 days?
What is 432,000 seconds
500
A beaker contains a clear, colorless liquid. If it is water, how could you determine whether it contained dissolved table salt?
Boil the liquid
500
Is dissolving sugar in water a physical or chemical change?
physical
500
1
How many significant figures are in 1,000 mL?
500
What is the mass in grams of a cube of gold (density = 19.32 g/cm3) if the length of the cube is 2.00 centimeters?
What is 155 grams
500
My dog, Chico, weighs 8.70 lbs. How much does he weigh in kilograms? (1 Kg= 2.2046 lb)
What is 3.95 Kg
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