The Negative Effects of Love

Assignment 1. Questions from chapters 1 and 2 of McMurry and Fay Question numbers are from the fourth edition. Chapter 1. Chemistry: Matter and Measurement

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1.1 1.2 1.3

(a) Cd (b) Sb (a) silver

(c) Am (c) rhenium (d) cesium (e) argon (f) arsenic

(b) rhodium

(a) Ti, metal (d) Sc, metal

(b) Te, semimetal (e) At, semimetal

(c) Se, nonmetal (f) Ar, nonmetal

1.4 1.5

The three Acoinage metals@ are copper (Cu), silver (Ag), and gold (Au). (a) The decimal point must be shifted ten places to the right so the exponent is S10. The S result is 3.72 x 10 10 m. (b) The decimal point must be shifted eleven places to the left so the exponent is 11. The result is 1.5 x 1011 m. (a) microgram (b) decimeter (c) picosecond (d) kiloampere (e) millimole
5 o 5 x ( F _ 32) = x (98.6 _ 32) = 37.0 o C 9 9 K = o C + 273.15 = 37.0 + 273.15 = 310.2 K o 1.6

1.7

C=

1.8

(a) K = oC + 273.15 = S78 + 273.15 = 195.15 K = 195 K 9 9 (b) o F = ( x o C) + 32 = ( x 158) + 32 = 316.4o F = 316 o F 5 5 (c) oC = K S 273.15 = 375 S 273.15 = 101.85oC = 102oC 9 9 o F = ( x o C) + 32 = ( x 101.85) + 32 = 215.33o F = 215o F 5 5

1.9

d=

m 27.43 g = = 2.212 g/ cm 3 V 12.40 cm 3
1 mL = 6.32 mL 1.483 g

1.10
1.11

volume = 9.37 g x

The actual mass of the bottle and the acetone = 38.0015 g + 0.7791 g = 38.7806 g. The measured values are 38.7798 g, 38.7795 g, and 38.7801 g. These values are both close to each other and close to the actual mass. Therefore the results are both precise and accurate.

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Chapter 1 S Chemistry: Matter and Measurement _____________________________________________________________________________ 1.12 (a) 76.600 kg has 5 significant figures because zeros at the end of a number and after the decimal point are always significant. (b) 4.502 00 x 103 g has 6 significant figures because zeros in the middle of a number are significant and zeros at the end of a number and after the decimal point are always significant. (c) 3000 nm