Chemistry Chapter 2 Questions

Which of the following measurements has three significant figures? a.) 0.006 g b.) 0.03750 g c.) 1,207 g d.) 0.0250 g e.) 4.250 g

d.) 0.0250 g

Which of the following is the correct scientific notation form of 0.000000325? a.) 3.25 x 10^-6 b.) 32.5 x 10^-6 c.) 3.25 x 10^7 d.) 3.25 x 10^-7

d.) 3.25 x 10^-7

In which of the following numbers are all of the zeros not significant? a.) 607.80 b.) 0.0450 c.) 45.060 d.) 3300

d.) 3300

The correct scientific notation for the number 500.0 is? a.) 5 x 10^-2 b.) 5.00 x 10^2 c.) 5 x 10^2 d.) 5.000 x 10^2 e.) none of the above

d.) 5.000 x 10^2

What is the total length of two pieces of tubing which measure 4.5 cm and 3.222 cm? Express the answer to the correct number of significant figures. a.) 8 cm b.) 3.722 cm c.) 7.722 cm d.) 7.7 cm e.) 4.722 cm

d.) 7.7 cm

Convert the following values from scientific notation to standard notation; 2.4 x 10^-3 m

0.0024 m

Convert the following values from scientific notation to standard notation; 4.00 x 10^-2 m

0.0400 m

Round 1.243 kg to two significant figures.

1.2 kg

Round 12.12 L to one significant figure.

10 L

Round 16.97 g to three significant figures.

17.0 g

Round 17.667 mL to four significant figures.

17.67 mL

Perform each of the following calculations to the correct number of significant figures; (78.7 ÷ 88.529) + 360.45 = 361.338974234

361.34

Perform each of the following calculations to the correct number of significant figures; (78.4 - 44.889) ÷ 0.0083 = 4037.4698...

4000

Convert the following values from scientific notation to standard notation; 4.885 x 10^4 mg

48,850 mg

Perform each of the following calculations to the correct number of significant figures; (892 ÷ 986.7) + 4.53 =

5.43

Perform each of the following calculations to the correct number of significant figures; (34.6784 x 5.38) + 432.22 = 618.789792

619

How many significant figures in the equivalence 1m = 100cm?

An unlimited amount

Which one of the following calculations of measured numbers will result in an answer with three significant figures? a.) (15.42 + 4.5)/ (152.23 - 10.107) b.) 7.61 + 3.59 c.) 458.1 x 0.01200 d.) 6.438/ (6.48 x 0.0043)

a.) (15.42 + 4.5)/ (152.23 - 10.107) --> 0.140

Find the numerical value of 1.2 x 1.222? Express your answer using the correct number of significant figures. a.) 1.5 b.) 1.466 c.) 1.47 d.) 1.4664 e.) none of the above

a.) 1.5

How many significant figures are in each number? a.) The number 55.17 contains... b.) The number 0.00280 contains... c.) The number 2.5 x 10^3 contains... d.) The number 0.800 contains... e.) The number 2700 contains...

a.) 4 sig figs b.) 3 sig figs c.) 2 sig figs d.) 3 sig figs e.) an ambiguous number of significant figures

How many significant digits should be reported in the answer to the following calculation? (4.3 - 3.7) x 12.3 = ? a.) 3 b.) 4 c.) 1 d.) 2 e.) none of the above

c.) 1

In scientific notation, the number 185,000,000 is? a.) 185 x 10^-8 b.) 1.85 x 10^-8 c.) 1.85 x 10^8 d.) 185 x 10^6 e.) 1.85 x 10^6

c.) 1.85 x 10^8