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Chemistry Ch.3 Review

Test Description: Review of Ch.3

Instructions: Answer all questions to get your test result.

1) What is the closeness to a true value?

Aaccuracy Bweight Cprecision Dabsolute zero

2) The diameter of a carbon atom is 0.000000874 m. What is this number in scientific notation?

A87.4 x 10^6 B8.74 x 10^-7 C87.4 x 10^-6 D8.74 x 10^7

3) What is the result of adding 4.5 x10^3 and 2.7 x 10^2?

A3.15 x 10^2 B3.15 x 10^3 C4.77 x 10^2 D4.77 x 10^3

4) Which of the following measurements contains two significant figures?

A0.00067 L B0.00670 L C0.00607 L D0.00600 L

5) How many significant figures are in the measurement 54,500 mg?

A4 B2 C3 D5

6) Express the sum of 8.79 m and 6.0 m using the correct number of significant figures.

A15 B14.8 m Cnone of the choices D14.79 m

7) Which of the following volumes is the smallest?

Aone microliter Bone deciliter Cone milliliter Done liter

8) What is the temperature -48 degrees Celsius in kelvins?

Anone of the choices B321 K C-225 K D225 K

9) What is the quantity 0.0097 meters expressed in centimeters?

A97 cm B9.7 cm C0.97 cm D0.097 cm

10) Density is found by dividing __________.

Avolume by mass Barea by mass Cmass by area Dmass by volume

11) What is the density of an object having a mass of 7.2 g and a volume of 34 mL?

A244.8 g/mL B0.21 g/mL C4.7 g/mL Dnone of above

12) Convert 342 L to gallons.

Anone of the choices B90.6 gal C1450.1 gal D80.7 gal

13) If you are traveling at 85 miles per hour, how fast are you traveling in meters per second?

Anone of the choices B136787.6 m/s C38 m/s D124.7 m/s

14) The quantity of matter an object contains is ________________.

Anone of the choices Bmass Cweight Dvolume

15) The SI scale for temperature is _________________.

AFahrenheit Bnone of the choices CKelvin DCelsius

16) The force of gravity on an object is called ________________.

Aweight Bvolume Cmass Dnone of the choices

17) Express 52,600 km in scientific notation.

A52.6 x 10^3 B52.6 x 10^-3 C5.26 x 10^4 D5.26 x 10^-4

18) What is the result of multiplying 3.4 x 10^9 by 4.3 x 10^-6?

A1.5 x 10^4 B14.6 x 10^14 C14.6 x 10^3 D1.5 x 10^15

19) Which group of measurements is the most precise?

Anone of the choices B2.0 g, 3.0 g, 4.0 g C2 g, 2.5 g, 3 g D2 g, 3 g, 4 g

20) What is the measurement 233.008 mm rounded off to four significant digits?

A233.01 mm B230 mm C233.0 mm D233 mm

*select an answer for all questions

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