Problems B
41
36 If the pnce of platinum is $851/oz (ounce avoirdupois), what is the cost of a
crucible and cover weighing 12 356 g
9
37 Liquid nitrogen boils at —195 82°C What are the boiling points on the
Fahrenheit and Kelvin scales
0
38 How many kilograms are there in 5 00 megatons of limestone
9
39 Gallium is unusual in that it boils at 1700°C and melts at 29 8°C What are
these temperatures on the Fahrenheit and Kelvin scales
9
40 If 50 0 g of a substance S contains 6 02 x 10! molecules, and if the crosssectional area of each molecule is 20 0 A
2 , what is the surface area of a solid
that needs 1 50 g of S to cover it with a layer one molecule thick
9
41 (a) If there are 6 02 x 10
23 molecules in 58 3 ml of ethyl alcohol, what is the
volume occupied by one molecule' (b) If the molecules were little spheres,
what would be the radius of an ethyl alcohol molecule
9 (Give the answer in
angstroms )
42 A regulation baseball is 9 00 inches in circumference What is its diameter in
centimeters
9
43 A manufacturer of a glass-fiber insulation material impresses his potential
customers with the 'fineness ' of his product (and presumably with its insulating qualities too) by handing them glass marbles i inch in diameter and stating
that there is enough glass in a single marble to make 96 miles of glass fiber of
the type used in his product If this is true, what is the diameter of the
insulating glass fibers
9
44 The volume of a red blood cell is about 90 /xm' What is its diameter in
millimeters
9 (Assume that the cell is spherical )
45 A i-mch-diameter marble is placed in a graduated cylinder containing 10 0 ml
of water To what level will the liquid rise in the cylinder
9
46 A solution contains 0 0500 g of salt per millihter How many milliliters of this
solution will be needed if we are to get 100 g of salt
9
47 A solution contains 1 00 g of sulfunc acid per 100 ml How many grams of acid
will be contained in 350 ml
9
48 How many grams of sulfunc acid must be added to 500 g of water in order that
the resulting solution be (by weight) 20 percent sulfunc acid'
49 The average velocity of a hydrogen molecule at 0°C is 1 84 x 10^ cm/sec (a)
How many miles per hour (mph) is this
7 Molecular gas velocities are proportional to the square root of the absolute temperature (b) At what temperature
will the velocity of a hydrogen molecule be 100,000 mph
9
50 A 10 ml graduated pipet has an 18-inch scale graduated in tenths of milliliters
What is the internal diameter of the pipet
9
51 An error of 1 0 mm was made in adjusting the meniscus (liquid level) to the
mark in a 10 ml volumetric pipet The internal diameter of the pipet stem was
41
36 If the pnce of platinum is $851/oz (ounce avoirdupois), what is the cost of a
crucible and cover weighing 12 356 g
9
37 Liquid nitrogen boils at —195 82°C What are the boiling points on the
Fahrenheit and Kelvin scales
0
38 How many kilograms are there in 5 00 megatons of limestone
9
39 Gallium is unusual in that it boils at 1700°C and melts at 29 8°C What are
these temperatures on the Fahrenheit and Kelvin scales
9
40 If 50 0 g of a substance S contains 6 02 x 10! molecules, and if the crosssectional area of each molecule is 20 0 A
2 , what is the surface area of a solid
that needs 1 50 g of S to cover it with a layer one molecule thick
9
41 (a) If there are 6 02 x 10
23 molecules in 58 3 ml of ethyl alcohol, what is the
volume occupied by one molecule' (b) If the molecules were little spheres,
what would be the radius of an ethyl alcohol molecule
9 (Give the answer in
angstroms )
42 A regulation baseball is 9 00 inches in circumference What is its diameter in
centimeters
9
43 A manufacturer of a glass-fiber insulation material impresses his potential
customers with the 'fineness ' of his product (and presumably with its insulating qualities too) by handing them glass marbles i inch in diameter and stating
that there is enough glass in a single marble to make 96 miles of glass fiber of
the type used in his product If this is true, what is the diameter of the
insulating glass fibers
9
44 The volume of a red blood cell is about 90 /xm' What is its diameter in
millimeters
9 (Assume that the cell is spherical )
45 A i-mch-diameter marble is placed in a graduated cylinder containing 10 0 ml
of water To what level will the liquid rise in the cylinder
9
46 A solution contains 0 0500 g of salt per millihter How many milliliters of this
solution will be needed if we are to get 100 g of salt
9
47 A solution contains 1 00 g of sulfunc acid per 100 ml How many grams of acid
will be contained in 350 ml
9
48 How many grams of sulfunc acid must be added to 500 g of water in order that
the resulting solution be (by weight) 20 percent sulfunc acid'
49 The average velocity of a hydrogen molecule at 0°C is 1 84 x 10^ cm/sec (a)
How many miles per hour (mph) is this
7 Molecular gas velocities are proportional to the square root of the absolute temperature (b) At what temperature
will the velocity of a hydrogen molecule be 100,000 mph
9
50 A 10 ml graduated pipet has an 18-inch scale graduated in tenths of milliliters
What is the internal diameter of the pipet
9
51 An error of 1 0 mm was made in adjusting the meniscus (liquid level) to the
mark in a 10 ml volumetric pipet The internal diameter of the pipet stem was