The distance between the earth and the sun is 90.0 x 10^6 miles. Calculate this distance in cm knowing that 2.54cm = 1 inch. (report your answer to 3 sig figs)
14.5 x 10^13 cm
100
Cooking an egg is an example of what kind of a change?
Chemical change.
100
What is the quantity of 0.0075 meters expressed in cm?
.75 cm
100
What is the density of 37.72g of matter whose volume is 6.80 cm^3?
5.55 g/cm^3
100
Vaporizing gasoline is an example of what kind of change?
Physical change.
200
How many minutes are in a week?
10080 minutes.
200
Solubility is an example of what kind of property?
Physical property
200
How many sig figs are in 0.04050?
4
200
An object has a density of 2.70 g/cm^3 and a volume of 1.50 cm^3. What is it's mass?
4.05 g
200
Sugar is an example of an element, compound, or mixture?
compound
300
A car covers a distance of 112.5 km in 1.8 hours. Calculate its speed in meters per second.
17.38 m/s
300
Milk going sour is an example of what kind of change?
A chemical change.
300
Which measurement has been expressed to 4 sig figs?
0.0020
0.00402
30.00
4020
30.00
300
What is the volume of 80.0 g of ether if the density is 0.70 g/mL?
110 mL
300
Which of the following can be classified as a mixture?
Pure water
Air
Nitrogen
Sugar
Air
400
Which is the correct measurement for location marked by the arrow?
17.7_
400
Salt forming from evaporated sea water is an example of
A physical change.
400
In the measurement 0.5030 which digit is the estimated digit?
The last zero
400
What is the volume of a salt crystal measuring 2.44 x 10^-2 m by 1.4 x 10^-3 m by 8.4 x 10^-3 m?
2.9 x 10^-7 m^3
400
Copper II sulfate dissolves in water to form a blue liquid.
What kind of a property is this?
Physical Property
500
There is 2.54cm in 1 inch. A paperclip is 3.2cm long. How many paperclips would it take to stretch across a 100 yard football field?
2857.5 paperclips
500
Dry ice as it sits out of a cooler and turns into gaseous carbon dioxide. What kind of a change is this?
Physical change.
500
Calculate the density of an object that has a mass of 4.60 g and has a length of 3.2 x 10^-2 cm a width of 4.6 x 10^-4 cm and a height of 1.8 x 10^-3 cm.
1.74 x 10^8 g/cm^3
500
A compound weighs 4.65 g. After heating the compound weight 3.05 g. During the heating process all of the water from the compound was driven off. What was the percent of water in the compound?
34.4%
500
What is the difference between weight and mass?
Weight is the gravitational pull on an object of a given mass. For our planet weight and mass are equal.