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Chapter 1: Q29E (page 56)
The volume of a sample of oxygen gas changed from 10 mL to 11 mL as the temperature changed. Is this a chemical or physical change?
Physical change.
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Question: A chemist鈥檚 50-Trillion Angstrom Run (see Exercise 1.78) would be an archeologist鈥檚 10,900 cubit run. Howlong is one cubit in meters and in feet? (1 脜 = 1 脳 10-8 cm)
Question: Calculate these masses
a) What is the mass of 6.00 cm3 of mercury, density = 13.5939 g/cm3?
b) What is the mass of 25.0 mL octane, density = 0.702 g/cm3?
Complete the following conversions between SI units.
(a) 612 g = ________ mg
(b) 8.160 m = ________ cm
(c) 3779 渭g = ________ g
(d) 781 mL = ________ L
(e) 4.18 kg = ________ g
(f) 27.8 m = ________ km
(g) 0.13 mL = ________ L
(h) 1738 km = ________ m
(i) 1.9 Gg = ________ g
The weather in Europe was unusually warm during the summer of \(1995\). The TV news reported temperatures as high as \(45{\rm{ }}^\circ C\). What was the temperature on the Fahrenheit scale?
Toothpastes containing sodium hydrogen carbonate (sodium bicarbonate) and hydrogen peroxide are widely used. Write Lewis structures for the hydrogen carbonate ion and hydrogen peroxide molecule, with resonance forms where appropriate.
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