Chapter 1, Problem 1.121E

A general chemistry student found a chunk of metal in the basement of a friend's house.To figure out what it was,she used the ideas just developed in class about density. She measured the mass of the metal to be 111.2 grams.Then she dropped the metal into a measuring cup and found that it displaced 15.2mL of water. Calculate the density of the metal. Density=     G/mL

Aroldis Chapman is a MLB relief pitcher who recorded the fastest pitch in a major league game, which was clocked at 105 mi per hour. What was this speed in m/s? (1 mi = 1.609 km)

For a material to float on the surface of water, the material must have a density less than that of water (1.0 g/mL) and must not react with the water or dissolve in it. A spherical ball has a radius of 0.50 cm and weighs 2.0 g. Will (his ball float or sink when placed in water? (Note: Volume of a sphere=43r3 .)

Consider multiplying “26.2” by “16.43.” What would a mathematician say the answer is? What would a scientist say? Justify the scientist’s answer, not merely citing the rule, hut explaining it.

1.47 A student weighs 10 quarters and finds that their total mass is 56.63 grams. What should she report as the average mass of quarter based on her data?

1.48 A rock is placed on a balance and its mass is determined as 12.1 g. When the rock is then placed in a graduated cylinder that originally contains 11.3 mL of water, the new volume is roughly 17 rnL. How should the density of the rock be reported?

A woman’s basketball has a circumference between 28.5 and 29.0 inches and a maximum weight of 20 ounces (two significant figures), What are these specifications in units of centimeters and grams?

A perfect cube of unknown elemental composition has a length of 1.40 m on each side. The mass of the cube is 21.57 Mg (megagrams). Using this information and Table 2.8, determine the metal used to prepare the cube.

How tall are you in a meters; b decimeters; c centimeters; d millimeters? Which of the four metric units do you think would be most useful in expressing peoples heights without resorting to decimal fractions?