Part 1
It has a fixed volume and has a fixed shape.
solid
An atom is
the smallest unit of matter that maintains its chemical identity.
If a mixture is uniform throughout, it is called
homogeneous mixture
Which of these measurements has been expressed to four significant figures?
0.0020 mm, 0.0402 mm, 30.00 mm, or 402.10 mm
30.00 mm
Which of the following is a heterogeneous mixture?
a. oxygen
b. salt
c. gatorade
d. milk
milk
The two most important properties of all matter are
taking up space and having mass.
An example of a homogeneous mixture is which of the following:
carbon dioxide, sugar, oil and water, or sugar and water
sugar and water
Measurements that closely agree with each other is best described as
precise
A compound is
a substance, made of two or more atoms that are chemically bonded, that can be broken down into simpler, stable substances.
Matter includes all of the following except
air, smoke, light, or water vapor?
light
An analytical balance can measure mass to the nearest 0.001 g. In scientific notation, the accuracy of the balance would be expressed as
1x10-3 g.
Which of these is an abbreviation for the SI base unit of time?
s
A chemical can be defined as
any substance that has a definite composition.
A mixture is a combination of two or more kinds of matter that are not chemically combined.
true or false
true
Which of these measurements has only nonsignificant zeros?
0.0037 mL, 60.0 mL, 400. mL, or 506 mL
0.0037 mL
The result of dividing 1x10^7 by 1x10^-3 is
1 x 1010
Applied research is usually performed
to solve a particular problem.
Which of the following is an extensive property of matter? boiling point, hardness, melting point, or volume
volume
The number of significant figures in the measured value 0.0002204 kg
4
Which of the following observations is quantitative?
The liquid turns blue litmus paper red.
The liquid boils at 100℃.
The liquid tastes bitter.
The liquid is cloudy.
The liquid boils at 100℃.