Chapter 1: Q68-E (page 9)
A very good 197-lb weight lifter lifted 192 kg in a move called the clean and jerk. What was the mass of theweight lifted in pounds?
Short Answer
The mass of the weight lifted in pounds is 423 lb.
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Chapter 1: Q68-E (page 9)
A very good 197-lb weight lifter lifted 192 kg in a move called the clean and jerk. What was the mass of theweight lifted in pounds?
The mass of the weight lifted in pounds is 423 lb.
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Classify the following sets of measurements as accurate, precise, both, or neither.
(a) Checking for consistency in the weight of chocolate chip cookies: 17.27 g, 13.05 g, 19.46 g, 16.92 g
(b) Testing the volume of a batch of 25-mL pipettes: 27.02 mL, 26.99 mL, 26.97 mL, 27.01 mL
(c) Determining the purity of gold: 99.9999%, 99.9998%, 99.9998%, 99.9999%
The density (d) of a substance is an intensive property that is defined as the ratio of its mass(m) to its volume (V).
\(\begin{aligned}{\rm{density = }}\frac{{{\rm{mass}}}}{{{\rm{volume}}}}\\{\rm{d = }}\frac{{\rm{m}}}{{\rm{v}}}\end{aligned}\)
Considering that mass and volume are intensive properties, explain why their ratio, density is intensive.
How much heat is produced when 100 mL of 0.250 M HCl (density, 1.00 g/mL) and 200 mL of 0.150 M NaOH (density, 1.00 g/mL) are mixed?
\({\bf{HCl(aq) + NaOH(aq)}} \to {\bf{NaCl(aq) + }}{{\bf{H}}_{\bf{2}}}{\bf{O(l) \Delta H}}_{{\bf{298}}}^{\bf{^\circ }}{\bf{ = - 58kJ}}\)
If both solutions are at the same temperature and the heat capacity of the products is 4.19 J/g °C, how much will the temperature increase? What assumption did you make in your calculation?
How are the molecules in oxygen gas, the molecules in hydrogen gas, and water molecules similar? How do they differ?
Gasoline is sold by the liter in many countries. How many liters are required to fill a 12.0-gal gas tank?
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