Classification of Matter
Trail mix is an example of a _______________ type of mixture.
heterogeneous
Convert 17km to meters.
17,000 meters
How many significant figures are in the number 4,230?
3 significant figures
Convert the following number from standard form to scientific notation:
6,000,000,000
6 x 109
A student uses a scale to measure the mass of a sample of NaCl, they record it as 18.3 grams. The actual mass of the salt is 20.0 grams. What is the percent error of the students measurement?
8.5%
Which of the following is a compound?
A. salt water
B. zinc
C. lead
D. salt
D. salt
The moon is 250,000 miles away. How many feet is it from earth?
1 mi = 5,280 ft
1,320,000,000 ft
How many significant figures are in the number 0.000000020490?
5 significant figures
Convert the following number from standard form to scientific notation:
0.000256
2.5 x 10-4
The mass of an unknown sample was found to be 15.6 grams and the volume 32.2 milliliters. What is the density of the unknown sample?
0.484 g/mL
Which of the following is not a chemical change?
A. rusting
B. igniting
C. melting
D. burning
C. melting
Convert 15.9 mm to km. Provide answer in scientific notation.
1.59 x 10-5 km
We generally report a measurement by recording all of the certain digits plus ____ estimated digit(s)
one
Convert the following number from scientific notation to standard form:
6.08 x 10-5
0.0000608
DAILY DOUBLE!
The volume of a sheet of aluminum foil is calculated to be 15 mL. The density of aluminum is 2.7 g/mL. What is the mass of the sample of aluminum foil?
40.5 grams
Which of the following is a heterogeneous mixture?
A. soil
B. ground beef
C. the air trapped inside of a balloon
D. chocolate chip cookies
C. the air trapped inside of a balloon
The distance from Santa Maria to Los Alamos is 16.25 mi. What is the distance in cm?
0.621 mi = 1.00 km
2,617,000
Which of the following numbers contains the designated CORRECT number of significant figures?
156000 3 significant figures
A student wrote out the following number in scientific notation: 0.197 x 105. Unfortunately they were wrong. What is the correct way to write this #?
1.97 x 104
A classroom conducted an experiment and found that the density of a small lump of iron was 8.011 g/mL. The accepted density of iron is 7.874 g/mL. What is the percent error of the experiment conducted?
1.74%
Draw out the flow chart for the classification of matter. Include the following:
element, compound, homogeneous, heterogeneous, pure substance, and mixture
Classification of Matter
Pure Substance Mixture
Element Compound Heterogeneous Homogeneous
My lexus has been driven 287,000 miles. If it weighs 55,552 ounces, how many tons does it weigh?
1 lb = 16 oz
= 1.736 tons
A scientist obtains the number 0.045006700 on a calculator. If this number actually has four (4) significant figures, how should it be written?
0.04501
A box contains 5 x 103 paper clips. The mass of each paper clip in the box is 8 x 10-4 kilogram. What is the combined mass of the paper clips in the box?
2 kg
The density of carbon dioxide in air is 0.65 mg/L, what volume is occupied by 12g of carbon dioxide?
= 18461.54 L