Answer to Question #265748 in General Chemistry for Cassi

Question

((This is the last thing I'll ask please just answer only these! ))

A) How many significant digits do the following measured quantities have?

i) 2.83 cm

iii) 14.0 g

v) 0.02 mL

vii) 2.350 x 10–2 L

ix) 3 fingers

ii) 36.77 mm

iv) 0.0033 kg

vi) 0.2410 km

viii) 1.00009 L

x) 0.0056040 g

B) How many significant digits do the following measured quantities have?

i) 83.25 – 0.1075

ii) 4.02 + 0.001

iii) 0.2983 + 1.52

C) How many significant digits do the following measured quantities have?

i) 7.255 ÷ 81.334

ii) 1.142 x 0.002

iii) 31.22 x 9.8

D) Solve the following:

i) 6.12 x 3.734 + 16.1 ÷ 2.3

ii) 0.0030 + 0.02

iii) 1.70 x 103 + 1.34 x 105

iv) (33.4 + 112.7 + 0.032)/(6.487)

E) Convert these measurements:

i) 1.0 cm = ______ m

ii) 0.0390 kg = ______ g

iii) 1.7 m = _____ mm

((Sorry for the trouble but I would just like this answered and not the previous comments))

-Cassi <3

Answer 1

A) i) 3 significant digits

iii) 2 significant digits

v) 1 significant digit

vii) 3 significant digits

ix) 3 significant digits

ii) 4 significant digits

iv) 2 significant digits

vi) 3 significant digits

viii) 6 significant digits

x) 6 significant digits

B) i) 83.25 – 0.1075 = 83,1425 (6 significant digits)

ii) 4.02 + 0.001 = 4.021 (4 significant digits)

iii) 0.2983 + 1.52 = 1,8183 (5 significant digits)

C) i) 7.255 ÷ 81.334 = 0.0892 (4 significant digits)

ii) 1.142 x 0.002 = 0,002284 (6 significant digits)

iii) 31.22 x 9.8 = 305,96 (5 significant digits)

D) i) 6.12 x 3.734 + 16.1 ÷ 2.3 = 29,852

ii) 0.0030 + 0.02 = 0.023

iii) 1.70 x 103 + 1.34 x 105 = 315,8

iv) (33.4 + 112.7 + 0.032)/(6.487) = 22,527

E) i) 1.0 cm = 0.01 m

ii) 0.0390 kg = 39 g

iii) 1.7 m = 1700 mm