98
Density and Buoyancy
Weight of empty flask = 31 862 g
Weight of flask + sample = 56 986 g
Weight of flask + sample + benzene to fill = 75 086 g
Weight of flask + benzene (without sample) = S2 175 g
15 A sample of benzene (D = 0 88 g/ml) weighs 25 3728 g in air with brass
weights What is the weight in \acuo
r>
16 A platinum crucible (D = 21 5 g/ml) weighs 56 3724 g in air with brass
weights What is the weight in \ acuo *>
17 A brass sample weighs 16 3428 g in air with brass weights What is the weight
in vacua
9
18 The density of water at 25°C is 0 9970 g/ml What volume is occupied by
1 0000 g of water weighed in air with brass weights
7
19 A chemical of density 2 50 g/ml is weighed in air with brass weights The
observed weight is 0 2547 g Show by calculation that it is not necessary to
make a correction of the weight to vac MO if the weighing is reliable only to the
nearest 0 2 mg
20 What weight of water at 25°C, weighed in air with brass weights, should be
delivered by a 25 00 ml pipet if it is accurately graduated
17
21 A spherical balloon 100 ft in diameter is filled with a gas having a density
one-fifth that of air The density of air is 1 20 g/liter How many pounds,
including its own weight, can the balloon lift
9 (The lift is the difference between the weight of the gas and that of an equal volume of air )
PROBLEMS B
22 The density of a sodium hydroxide solution is 1 1589 g/ml How much does 1
liter of this solution weigh
7
23 The density of carbon tetrachlonde is 1 595 g/ml How many millihters of
carbon tetrachlonde are needed to give 500 0 g"
7
24 The density of benzene is 0 879 g/ml How many grams of benzene will be
needed to fill a 25 ml graduated cylinder
17
25 A glass bulb with a stopcock weighs 66 3915 g evacuated, and 66 6539 g when
filled with xenon gas at 25°C The bulb holds 50 0 ml of water What is the
density of xenon at 25°C'
7
26 If 20 g of magnalium lathe turnings of density 2 50 g/ml are put into a 25 ml
graduated cylinder, what volume of water will be needed to complete the
filling of the cylinder to the 25 ml mark"
7
27 What is the weight (in pounds) of 1 cu ft of aluminum (density = 2 70 g/ml)'
7
Density and Buoyancy
Weight of empty flask = 31 862 g
Weight of flask + sample = 56 986 g
Weight of flask + sample + benzene to fill = 75 086 g
Weight of flask + benzene (without sample) = S2 175 g
15 A sample of benzene (D = 0 88 g/ml) weighs 25 3728 g in air with brass
weights What is the weight in \acuo
r>
16 A platinum crucible (D = 21 5 g/ml) weighs 56 3724 g in air with brass
weights What is the weight in \ acuo *>
17 A brass sample weighs 16 3428 g in air with brass weights What is the weight
in vacua
9
18 The density of water at 25°C is 0 9970 g/ml What volume is occupied by
1 0000 g of water weighed in air with brass weights
7
19 A chemical of density 2 50 g/ml is weighed in air with brass weights The
observed weight is 0 2547 g Show by calculation that it is not necessary to
make a correction of the weight to vac MO if the weighing is reliable only to the
nearest 0 2 mg
20 What weight of water at 25°C, weighed in air with brass weights, should be
delivered by a 25 00 ml pipet if it is accurately graduated
17
21 A spherical balloon 100 ft in diameter is filled with a gas having a density
one-fifth that of air The density of air is 1 20 g/liter How many pounds,
including its own weight, can the balloon lift
9 (The lift is the difference between the weight of the gas and that of an equal volume of air )
PROBLEMS B
22 The density of a sodium hydroxide solution is 1 1589 g/ml How much does 1
liter of this solution weigh
7
23 The density of carbon tetrachlonde is 1 595 g/ml How many millihters of
carbon tetrachlonde are needed to give 500 0 g"
7
24 The density of benzene is 0 879 g/ml How many grams of benzene will be
needed to fill a 25 ml graduated cylinder
17
25 A glass bulb with a stopcock weighs 66 3915 g evacuated, and 66 6539 g when
filled with xenon gas at 25°C The bulb holds 50 0 ml of water What is the
density of xenon at 25°C'
7
26 If 20 g of magnalium lathe turnings of density 2 50 g/ml are put into a 25 ml
graduated cylinder, what volume of water will be needed to complete the
filling of the cylinder to the 25 ml mark"
7
27 What is the weight (in pounds) of 1 cu ft of aluminum (density = 2 70 g/ml)'
7