Chemistry Test
What is precision?
(Precise measurement) how close the measured values are to each other
Calculate and give in scientific notation: 313.0 - 1.2 x 10^3
-(8.9 x 10^2)
What is the percentage error for a mass measurement of 17.7 g, gram that the correct value is 21.2 g?
-16.5%
The yield is an experiment should be 120.0 grams. However, you obtain 90.0 grams. calculate the percentage error.
-25%
Convert into to standard notation: 7.4 x 10^-3
0.000074
Convert into standard notation: 5.9 x 10^-4
0.00059
Convert into standard notation: 3.6 x 10^-2
0.036
Write the correct number of sig figs: 0.005
1
Write the correct number of sig figs: 2 x 10
1
Write the correct number of sig figs: 5 / 8.14 x 10^2 (Tricky)
1
Convert into to scientific notation: 0.010
1.0 x 10^-2
Convert into to scientific notation: 101.000
1.01 x 10^2
Calculate and give in scientific notation: (4.5 x 10^29)(2.45 x 10^100)
1.1 x 10^130
Convert into scientific notation: 0.014 x 10^2 (Tricky)
1.4 x 10 ^4
Convert into scientific notation: 172000
1.72 x 10^5
100 m = blank yds (1 yard = 0.914)
109.41 yds
A liquid is poured into a graduated cylinder that holds exactly 35.5 ml. The liquid used to fill the cylinder weighs 402.0 g. From this information, calculate the density of liquid in g/ml.
11.3 g/ml
Convert: 55.3l to gal
14.6 gal
Convert into standard notation: 1.56 x 10^4
15600
The density of carbon tetrachloride is 1.58 g/ml. What will 100ml of carbon tetrachloride weigh? (Hint: Mass formula)
158 ml/g
Write the correct number of sig figs: 3.0 x 10
2
Convert 200kg to hectograms
2.0 x 10^3
Convert 200kg to decagrams
2.0 x 10^4
Convert into scientific notation: 200.0 x 10^2 (Tricky)
2.0 x 10^4
Convert 200kg to decigrams
2.0 x 10^6
Convert 200kg to centigrams
2.0 x 10^7
Convert 200kg to milligrams
2.0 x 10^8
A piece of sulfur weighs 8 oz. When it was submerged in a graduated cylinder containing 50 mL of water, the level rose to 150ml. What is the density (g/ml) of the sulfur? (16oz = 454g) (Hint: Density formula)
2.27 g/cm^3
Convert into scientific notation: 256,000,000
2.56 x 10^8
Convert: 0.795 ft to cm
24.23
Convert: 26 km to m
26,000 m
The density of a substance is 5.30 g/ml. The mass of 0.500 liters of the substance is blank grams.
2650
Write the correct number of sig figs: 1.12 x 10^5
3
Write the correct number of sig figs: 6.06 x 10^5
3
Calculate and give in scientific notation: 2.34 x 10^6 + 9.2 x 10^5
3.3 x 10^6
Write the correct number of sig figs: 2.775 x 10^-4
4
Write the correct number of sig figs: 4.7192 x 10^2 / 3.862 x 10^-4 (Tricky)
4
Write the correct number of sig figs: 4.775 x 10^4
4
Write the correct number of sig figs: 5.567 x 10^8/2.215 x 10^8 (Tricky)
4
How many miles are in 6,500,00 mm? (1m = 3.28 ft; 5280 ft= 1 mile)
4.04 miles
Write the correct number of sig figs: 1.9376 x 10^2
5
Write the correct number of sig figs: 3.0001
5
Convert into standard notation: 5.9 x 10^3
5900
Write the correct number of sig figs: 2.27513 x 10^3
6
Convert: 6500 ml to l
6.5l
Calculate and give in scientific notation: 8.95 x 10^76/ 1.25 x 10^56
7.16 x 10^20
Convert into scientific notation: 727
7.27 x 10^2
Convert into standard notation: 7.369 x 10^-4
736900
Convert: 75 cm to mm
750 mm
Write the correct number of sig figs: 1.15197705 x 10^6
9
Write the correct number of sig figs: 2.38617954 x 10^-1
9
Convert into scientific notation: 0.000984
9.84 x 10 ^-4
Convert into to standard notation: 9.11 x 10^3
9110
Why do we need sig figs in calculations?
Help calculate big numbers and make numbers more precise.
what is accuracy?
how close a measurement is to the true value
