Question 1

The drawing shows two water molecules.Which statement is correct?

Accepted Answer

A) A: covalent bond;B: hydrogen bond;B is stronger 
B) A: hydrogen bond;B: covalent bond;A is stronger 
C) A: covalent bond;B: hydrogen bond;A is stronger 
D) A: hydrogen bond;B: covalent bond;B is stronger 
A) A: covalent bond;B: hydrogen bond;B is stronger 
B) A: hydrogen bond;B: covalent bond;A is stronger 
C) A: covalent bond;B: hydrogen bond;A is stronger 
D) A: hydrogen bond;B: covalent bond;B is stronger

Question 2

The formula for a sulfate ion is SO42¯.What is the formula of gallium (Ga)sulfate?

Accepted Answer

A) GaSO4 
B) Ga2SO4 
C) Ga2(SO4)3 
D) Ga3(SO4)2 
A) GaSO4 
B) Ga2SO4 
C) Ga2(SO4)3 
D) Ga3(SO4)2

Question 3

Which form of water disinfection continues to provide antibacterial protection after the water leaves the purification plant?

Accepted Answer

A) chlorination 
B) ozonation 
C) UV radiation 
D) filtration 
A) chlorination 
B) ozonation 
C) UV radiation 
D) filtration

Question 4

Which of the following are methods of making sea water appropriate for drinking?
__	Osmosis 
__	Reverse osmosis 
__	Distillation 
__	Flocculation

Accepted Answer

__	Osmosis 
X	Revers

Question 5

How many joules are required to heat 2.0 L of water from 20°C to its boiling point of 100°C? The specific heat of water is 4.18 J/g•°C and the density of water is 1 g/mL.

Accepted Answer

A) 6.7 × 105 J 
B) 1.7 × 105 J 
C) 3.8 × 104 J 
D) 6.7 × 102 J 
A) 6.7 × 105 J 
B) 1.7 × 105 J 
C) 3.8 × 104 J 
D) 6.7 × 102 J

Question 6

Which statement is not correct?

Accepted Answer

A) Lead has been used in water pipes since ancient times because it is an abundant,soft,and easily worked metal that does not rust. 
B) The symbol for lead,Pb,comes from the Latin name for lead "plumbum". 
C) When ingested,lead causes severe and permanent neurological problems in humans. 
D) The EPA estimates that one in two U.S.children under six years of age has a blood lead level above the acceptable level of 15 g/mL. 
A) Lead has been used in water pipes since ancient times because it is an abundant,soft,and easily worked metal that does not rust. 
B) The symbol for lead,Pb,comes from the Latin name for lead "plumbum". 
C) When ingested,lead causes severe and permanent neurological problems in humans. 
D) The EPA estimates that one in two U.S.children under six years of age has a blood lead level above the acceptable level of 15 g/mL.

Question 7

If the lead concentration in water is 1 ppm,then we should be able to recover 1 mg of lead from ____ L of water.

Accepted Answer

A) 0.01 
B) 0.1 
C) 1 
D) 10 
A) 0.01 
B) 0.1 
C) 1 
D) 10

Question 8

Most polyatomic ions

Accepted Answer

A) have a negative charge. 
B) are composed of a total of two atoms. 
C) are cations. 
D) contain sulfur atoms. 
A) have a negative charge. 
B) are composed of a total of two atoms. 
C) are cations. 
D) contain sulfur atoms.

Question 9

Which is the best representation of the solvation of a sodium cation in water?

Accepted Answer

A)    
B)    
C)    
D)    
A)    
B)    
C)    
D)

Question 10

A polar covalent bond is created when

Accepted Answer

A) a metallic element reacts with a nonmetallic element. 
B) two atoms share their bonding electrons unequally. 
C) two atoms share three or more electrons. 
D) two atoms of the same element form double or triple bonds. 
A) a metallic element reacts with a nonmetallic element. 
B) two atoms share their bonding electrons unequally. 
C) two atoms share three or more electrons. 
D) two atoms of the same element form double or triple bonds.

Question 11

The recommended daily requirement of calcium is 1,000 mg.Tap water in a Midwestern city contains approximately 150 mg Ca/L.A person living in the city who drinks two liters of water in one day would receive ________ percent of his/her RDA of calcium.

Accepted Answer

A) 3 
B) 7.5 
C) 15 
D) 30 
A) 3 
B) 7.5 
C) 15 
D) 30

Question 12

Potable water is water that

Accepted Answer

A) contains residual chlorine. 
B) is fit for human consumption. 
C) is contaminated with lead. 
D) contains too much residual ozone to be drinkable. 
A) contains residual chlorine. 
B) is fit for human consumption. 
C) is contaminated with lead. 
D) contains too much residual ozone to be drinkable.

Question 13

Which corresponds to the composition of the ion typically formed by magnesium?

Accepted Answer

A) A 
B) B 
C) C 
D) D 
A) A 
B) B 
C) C 
D) D

Question 14

Electronegativity

Accepted Answer

A) is a relative measure of an atom's attraction for electrons it shares in a covalent bond. 
B) is the total negative charge on a polyatomic anion. 
C) is the same for all of the elements in a family or group. 
D) decreases from left to right across a period on the periodic table. 
A) is a relative measure of an atom's attraction for electrons it shares in a covalent bond. 
B) is the total negative charge on a polyatomic anion. 
C) is the same for all of the elements in a family or group. 
D) decreases from left to right across a period on the periodic table.

The drawing shows two water molecules.Which statement is correct?

The formula for a sulfate ion is SO₄²¯.What is the formula of gallium (Ga)sulfate?

Which form of water disinfection continues to provide antibacterial protection after the water leaves the purification plant?

Which of the following are methods of making sea water appropriate for drinking? Osmosis Reverse osmosis Distillation Flocculation

How many joules are required to heat 2.0 L of water from 20°C to its boiling point of 100°C? The specific heat of water is 4.18 J/g•°C and the density of water is 1 g/mL.

Which statement is not correct?

If the lead concentration in water is 1 ppm,then we should be able to recover 1 mg of lead from ____ L of water.

Most polyatomic ions

Which is the best representation of the solvation of a sodium cation in water?

A polar covalent bond is created when

The recommended daily requirement of calcium is 1,000 mg.Tap water in a Midwestern city contains approximately 150 mg Ca/L.A person living in the city who drinks two liters of water in one day would receive ________ percent of his/her RDA of calcium.

Potable water is water that

Which corresponds to the composition of the ion typically formed by magnesium?

Electronegativity

The Air We Breathe

Protecting the Ozone Layer

The Chemistry of Global Climate Change

Energy From Combustion

Neutralizing the Threat of Acid Rain

The Fires of Nuclear Fission

Energy From Electron Transfer

The World of Polymers and Plastics

Manipulating Molecules and Designing Drugs

Nutrition: Food for Thought

Genetic Engineering and the Molecules of Life

Filters

Exam 5: Water for Life

The drawing shows two water molecules.Which statement is correct?

The formula for a sulfate ion is SO42¯.What is the formula of gallium (Ga)sulfate?

Which form of water disinfection continues to provide antibacterial protection after the water leaves the purification plant?

Which of the following are methods of making sea water appropriate for drinking? __ Osmosis __ Reverse osmosis __ Distillation __ Flocculation

How many joules are required to heat 2.0 L of water from 20°C to its boiling point of 100°C? The specific heat of water is 4.18 J/g•°C and the density of water is 1 g/mL.

Which statement is not correct?

If the lead concentration in water is 1 ppm,then we should be able to recover 1 mg of lead from ____ L of water.

Most polyatomic ions

Which is the best representation of the solvation of a sodium cation in water?

A polar covalent bond is created when

The recommended daily requirement of calcium is 1,000 mg.Tap water in a Midwestern city contains approximately 150 mg Ca/L.A person living in the city who drinks two liters of water in one day would receive ________ percent of his/her RDA of calcium.

Potable water is water that

Which corresponds to the composition of the ion typically formed by magnesium?

Electronegativity

The Air We Breathe

Protecting the Ozone Layer

The Chemistry of Global Climate Change

Energy From Combustion

Neutralizing the Threat of Acid Rain

The Fires of Nuclear Fission

Energy From Electron Transfer

The World of Polymers and Plastics

Manipulating Molecules and Designing Drugs

Nutrition: Food for Thought

Genetic Engineering and the Molecules of Life

Filters

The formula for a sulfate ion is SO₄²¯.What is the formula of gallium (Ga)sulfate?

Which of the following are methods of making sea water appropriate for drinking? Osmosis Reverse osmosis Distillation Flocculation