What is the measurement 111.009 mm rounded off to four significant digits?
a.111 mm c.111.01 mm
b.111.0 mm d.110 mm
What is 111.0 mm
100
What is the measurement 1042 L rounded off to two significant digits?
a.1.0 X 10 L c.1050 L
b.1040 L d.1.1X10 L
What is 1.0 X 10 L
100
What is the metric system prefix for the quantity 0.000 001?
a.centi- c.kilo-
b.deci- d.micro-
What is micro-
100
Which of the following units is NOT an official SI unit?
a.kilogram c.mole
b.ampere d.liter
What is liter
100
What is the boiling point of water in kelvins?
a.0 K c.273 K
b.100 K d.373 K
What is 373 K
200
Which of the following is a chemical property?
a.color c.freezing point
b.hardness d.ability to react with oxygen
What is ability to react with oxygen
200
Which of the following is a chemical property of water at 4 C?
a.its color
b.its state
c.its temperature
d.its ability to decompose into hydrogen and oxygen
What is its ability to decompose into hydrogen and oxygen
200
Which of the following measurements contains two significant figures?
a.0.004 00 L c.0.000 44 L
b.0.004 04 L d.0.004 40 L
What is 0.000 44 L
200
Which group of measurements is the most precise? (Each group of measurements is for a different object.)
A. 2 g, 3 g, 4 g C. 2 g, 2.5 g, 3 g
B. 2.0 g, 3.0 g, 4.0 g D. 1 g, 3 g, 5 g
What is 2 g, 2.5 g, 3 g
200
Which of the following measurements is expressed to three significant figures?
a.0.007 m c.7.30X10 km
b.7077 mg d.0.070 mm
What is 7.30X10 km
300
Which of the following is NOT a physical property of water?
a.It has a boiling point of 100 C.
b.It is a colorless liquid.
c.It is composed of hydrogen and oxygen.
d.Sugar dissolves in it.
What is It is composed of hydrogen and oxygen.
300
A vapor is which state of matter?
a.solid c.gas
b.liquid d.all of the above
What is gas
300
Which state of matter takes both the shape and volume of its container?
a.solid c.gas
b.liquid d.both b and c
What is gas
300
Which of the following CANNOT be classified as a substance?
a.table salt c.nitrogen
b.air d.gold
What is air
300
Which of the following items is NOT a compound?
a.baking soda c.sucrose
b.salad dressing d.able salt
What is salad dressing
400
Which of the following would a chemist be most likely to study?
1.a leaf floating on water
2.a leaf being blown by the wind
3.a leaf changing color in autumn
4.a leaf being eaten by insects
What is a leaf changing color in autumn
400
Which of the following statements is false?
1.Knowledge of chemistry allows the public to make informed decisions.
2.Studying chemistry ensures that officials make correct choices in funding technology
.
3.Knowledge of chemistry helps prepare people for careers in soil science.
What is Studying chemistry ensures that officials make correct choices in funding technology
400
Which of the following is an example of a current research focus in chemistry?
1.development of smoke detectors for common use
2.using hook-and-loop tape in the clothing industry
3.applying gene therapy to treat certain diseases
4.studying coal combustion as an energy source
What is applying gene therapy to treat certain diseases
400
What is the temperature –34 C expressed in kelvins?
a.139 K c.239 K
b.207 K d.339 K
What is 239 K
400
All of the following are physical properties of matter EXCEPT ____
a.mass c.melting point
b.color d.ability to rust
What is ability to rust
500
the study of the processes that take place in organisms
What is biochemistry
500
concerned with the mechanism, rate, and energy transfer that occurs when matter undergoes a change
What is physical chemistry
500
the study of all chemicals containing carbon
What is organic chemistry
500
the study of chemicals that, in general, do not contain carbon