How many significant figures are in the number 0.001040?

1.   ?    7
2.   ?    6
3.   ?    4
4.   ?    3
5.   ?    2

The number 3.0449 rounded off to three significant figures is:

1.   ?    3.05
2.   ?    3.045
3.   ?    3.04
4.   ?    3.046
5.   ?    None of these

Give the following answer in mm to the correct number of significant digits: (1.245x10^-2in)

1.   ?    3.16mm
2.   ?    3.162x10^-1mm
3.   ?    1.245mm
4.   ?    31.62mm
5.   ?    .00316mm

All of the following changes to a metal are physical changes except _______________.

1.   ?    bending
2.   ?    melting
3.   ?    rusting
4.   ?    cutting
5.   ?    polishing

A student makes a length measurement to the best precision possible using a measuring device graduated in metric units. If the value the student arrives at is 2.11dm, what are the smallest graduations on the measuring device.

1.   ?    decimeters
2.   ?    centimeters
3.   ?    millimeters
4.   ?    meters
5.   ?    micrometers

A gas is a form of matter that

1.   ?    has a definite volume
2.   ?    is generally a liquid or solid at room temperature
3.   ?    takes the shape of its container
4.   ?    is difficult to compress

What is the chemical symbol for sodium?

1.   ?    Ag
2.   ?    Fe
3.   ?    Hg
4.   ?    Na
5.   ?    Sn

Which of the folloing household items is not a pure compound?

1.   ?    baking soda
2.   ?    distilled water
3.   ?    sugar
4.   ?    salt
5.   ?    salad dressing

A student measures the length of an object with an accepted value of 23.451cm. If the student takes four measurements and arrives at the following values: 27.443cm, 27.441cm, 27.441cm and 27.444cm, what is the accuracy and precison of the measurement?

1.   ?    Accurate but not precise
2.   ?    Precise but not accurate
3.   ?    Precise and accurate
4.   ?    Neither precise nor accurate

A cubic centimeter (cm³) is equivalent to what other metric volume unit?

1.   ?    milliliter
2.   ?    liter
3.   ?    deciliter
4.   ?    centimeter
5.   ?    millimeter

The result of the following calucation has how many significant figures? (0.4333J/g^oC)(33.12^oC - 31.12^oC)(412.1g)

1.   ?    1
2.   ?    2
3.   ?    3
4.   ?    4
5.   ?    5

Gold has a density of 19.3g/cm³. Calculate the mass of a gold bar (in kilograms) measuring 0.200m by 0.100m by 0.100m.

1.   ?    19.8kg
2.   ?    44.1kg
3.   ?    22.3kg
4.   ?    38.6kg
5.   ?    63.8kg

Which one of the following is not a physical separation method?

1.   ?    Distillation
2.   ?    React the substance with another chemical
3.   ?    Chromatography
4.   ?    Filtration
5.   ?    All of the above are physical separation methods.

The solubility of ammonium bromide in water at 20^oC is 75.5g/100g of water. Its solubility at 50^oC is 99.2g/100g water. Calculate the mass of ammonium bromide that would not remain in solution if a solution made up of 29.0g of ammonium bromide in 35.0g of water at 50^oC is cooled to 20^oC.

1.   ?    2.60g
2.   ?    3.00g
3.   ?    4.27g
4.   ?    7.63g
5.   ?    1.22g

The Kohinoor Diamond (d = 3.51g/cm³) is 108carats. If one carat has a mass of 2.00x10²mg, what is the volume of the diamond in cubic inches?

1.   ?    1.23
2.   ?    0.779
3.   ?    0.376
4.   ?    0.182
5.   ?    0.889