Chem 103 Quiz 1 study guide

The correct number of significant figures in the number 0.02090:

How many significant digits should be reported in the answer to the following calculation:
(14.3-13.72) x 12.34=

Determine the answer to the following equation with correct number of significant figures:
(4.123 x 0.12) + 24.2=

How many grams are in 1.48 x 10^{7 ug?}

What is the density (g/mL) of an object that has the mass of 0.03089 lbs and a volume of 0.29oz?

Which state of matter has indefinite shape and is compressible?
A. solid
B. liquid
C. gas
D. plasma

Which of the following items is a pure substance?
A. ice
B. brass
C. air
D. seawater

Which of the following items is a mixture?
A. water
B. helium
C. brass
D. gold

Which of the following items is a physical property?
A. the corrosive actions of acid rain on granite
B. the odor of spearmint
C. the tarnishing of a copper statue
D. the combustion of gasoline

If a solid piece of shiny sodium metal is exposed to chlorine gas, a large amount oh heat is released and white, solid, sodium chloride forms. Based on this information, which of the following is true?
A. sodium chloride is an element
B. this process was exothermic
C. mass is lost during the process
D. this process represents a physical change

A silver base has a mass of 247g and, when placed in 10.0mL of water, changes the water level to 173.5mL.
Calculate the density of silver in g/mL: