Chemistry Test #1

Express the volume 781.2cm^3 in liters

.7812

A scientist obtains the number 0.045006700 on a calculator. If this number actually has four (4) significant figures, how should it be written?

0.0450

What Kelvin temperature is equal to -73 C?

200

What Kelvin temperature is equal to -33C?

240 K

A quantitative observation A- contains a number and a unit B- does not contain a number C- always makes a comparison D- must be obtained through experimentation E- is none of these

A

Convert 0.3980m to mm A- 398.0 mm B- 3.980 x 10^-3 mm C- 3.980 x 10^-4 mm D- 0.03980 mm E- none of these

A

Which of the following metric relationships is incorrect? A- 1 microliter = 10^-6 liters B- 1 gram = 10^3 kilograms C- 10^3 milliters = 1 liter D- 1 gram = 10^2 centigrams E- 10 decimeters = 1 meter

B

Which temperature represents absolute zero? A- 273 K B- 0 C C- 0 K D- 273 C

C

A metric unit for length is A- gram B- milliliter C- yard D- kilometer E- pound

D

Which of the following is an example of a quantitative observation? A- The piece of metal is longer than the piece of wood B- Solution 1 is much darker than solution 2 C- The liquid in beaker A is blue D- The temperature of the liquid is 60 degrees Celsius E- At least two of the above (A-D) are quantitative observations

D

Which of the following is NOT a unit in the SI system? A- ampere B- candela C- Kelvin D- meter E- calorie

E

What is the measure of resistance an object has to a change in its state of motion?

mass

The degree of agreement among several measurements of the same quantity is called ________. It reflects the reproducibility of a given type of measurement

precision