Conversions
How many milliliters are 525 liters?
0.525 L
Compound
What is 3.65 x 105 in long form?
365,000
Density is the amount of mass per _______.
Volume
A _______ change is one that changes the composition of the substance.
chemical
How many cups are 2.5 gallons?
40 cups
Homogeneous and heterogeneous
Which of these measurements has been expressed to three significant figures?
0.074g 0.705g 4.098g 300g
0.705 g
A measurement that closely agrees with an accepted value is best described as _________.
accurate
Which of the following is a physical property?
flammability density reactivity toxicity
density
Convert 8.44 x 10-9 megagrams to micrograms.
8440 micrograms
Which of the following is not a homogeneous mixture?
salt water oxygen gas air Gatorade
oxygen gas
985, 000 km expressed in scientific notation is written as which of the following? How many significant figures are in that number?
985 x 103 km 99 x 104 km 9.85 x 105 km
9.850 x 105 km
9.85 x 105 km
3 sig figs
A student weighs a beaker and records the mass as 328.2 grams. The actual mass of the beaker is 345 grams. Was the student accurate?
yes (-4.87% error)
Name two chemical changes.
burning, rotting, reacting, exploding, rusting, cooking
Convert 25.2 pounds per gallon to grams per cubic centimeters.
3.02 g/cm3
Which of the following is a pure substance?
salt water air brass carbon dioixide
carbon dioxide
State the answer with the correct number of significant figures.
(15.1-12.502)/0.573
4.5
Determine the mass (in kilograms) of 12.4 mL of bromine. The density of bromine is 3.119 g/mL.
0.0387 kg
Which of the following is an intensive property of matter?
mass density kinetic energy length
density