Question 1

In plentiful air,3.0 parts of carbon react with 8.0 parts of oxygen to form carbon dioxide.How much carbon is required to react with 1100 g of oxygen?

Accepted Answer

A) 600 g 
B) 550 g 
C) 2930g 
D) 413 g 
A) 600 g 
B) 550 g 
C) 2930g 
D) 413 g

Question 2

What is the name of the Russian chemist who was a pioneer in the development of the periodic law?

Accepted Answer

A) Meyerovic 
B) Mendeleev 
C) Döbereiner 
D) Berzelius 
A) Meyerovic 
B) Mendeleev 
C) Döbereiner 
D) Berzelius

Question 3

When 10.00 g of lead and 1.56 grams of sulfur react,11.56 g of lead sulfide is produced.Suppose 30.00 g of lead and 1.56 g of sulfur are allowed to react.Analysis of the reaction mixture would show

Accepted Answer

A) 31.56 g of lead sulfide. 
B) 34.68 g of lead sulfide. 
C) 11.56 g of lead sulfide and 20.00 g of lead. 
D) no reaction. 
A) 31.56 g of lead sulfide. 
B) 34.68 g of lead sulfide. 
C) 11.56 g of lead sulfide and 20.00 g of lead. 
D) no reaction.

Question 4

Leucippus and Democritus believed that all of the following statements about matter were true EXCEPT

Accepted Answer

A) Matter was made up of atoms. 
B) Each type of matter had a distinctive size and shape. 
C) Matter was continuous. 
D) Substances are mixtures of different kinds of atoms. 
A) Matter was made up of atoms. 
B) Each type of matter had a distinctive size and shape. 
C) Matter was continuous. 
D) Substances are mixtures of different kinds of atoms.

Question 5

Mendeleev arranged the elements in his periodic table solely in order of increasing atomic mass.

Accepted Answer

A) True 
 B)False

Question 6

How many grams of carbon are in 20.0 grams of CH₄?

Accepted Answer

A) 18.46 grams 
B) 14.98 grams 
C) 4)00 grams 
D) 8)00 grams 
A) 18.46 grams 
B) 14.98 grams 
C) 4)00 grams 
D) 8)00 grams

Question 7

What is the significance of the Law of Conservation of Mass in waste disposal?

Accepted Answer

The Law of Conservation of Mass, also kn

Question 8

Lavoisier measured the mass of substances before and after chemical reactions and summarized his observations in a(n)

Accepted Answer

A) hypothesis. 
B) observation. 
C) theory. 
D) law. 
A) hypothesis. 
B) observation. 
C) theory. 
D) law.

Question 9

We cannot destroy atoms.Thus,it is possible to reclaim and recycle all materials.

Accepted Answer

A) True 
 B)False

Question 10

Which of the following can be broken down into simpler substances?

Accepted Answer

A) CO 
B) Se 
C) Mg 
D) F 
A) CO 
B) Se 
C) Mg 
D) F

Question 11

Mendeleev was the first person to attempt to arrange the elements in a systematic order.

Accepted Answer

A) True 
 B)False

Question 12

Which one of the following is NOT part of Dalton's atomic theory?

Accepted Answer

A) Matter is composed of atoms. 
B) Atoms of the same element have the same properties. 
C) Atoms of different elements have different properties. 
D) Atoms change into other atoms in chemical reactions. 
A) Matter is composed of atoms. 
B) Atoms of the same element have the same properties. 
C) Atoms of different elements have different properties. 
D) Atoms change into other atoms in chemical reactions.

Question 13

Nitrogen forms a number of different compounds with oxygen,depending upon the experimental conditions.This type of observation concerning the behavior of matter is summarized by

Accepted Answer

A) the Law of Conservation of Mass. 
B) the Law of Definite Proportions. 
C) the Law of Constant Composition. 
D) the Law of Multiple Proportions. 
A) the Law of Conservation of Mass. 
B) the Law of Definite Proportions. 
C) the Law of Constant Composition. 
D) the Law of Multiple Proportions.

Question 14

Hydrogen peroxide decomposes into water and oxygen when exposed to heat or light.A tightly capped bottle of hydrogen peroxide is placed on a mass scale (a balance)and exposed to light for three weeks.The mass reading on the scale does not change.This is an example of

Accepted Answer

A) the Law of Conservation of Mass. 
B) the Law of Definite Proportions. 
C) the Law of Constant Composition. 
D) the Law of Multiple Proportions. 
A) the Law of Conservation of Mass. 
B) the Law of Definite Proportions. 
C) the Law of Constant Composition. 
D) the Law of Multiple Proportions.

Question 15

Heptane is always composed of 84.0% carbon and 16.0% hydrogen.This illustrates the Law of

Accepted Answer

A) Conservation of Mass. 
B) Definite Proportions. 
C) Multiple Proportions. 
D) all of the above 
A) Conservation of Mass. 
B) Definite Proportions. 
C) Multiple Proportions. 
D) all of the above

Question 16

The amount of aluminum on the earth today relative to the amount 100 years ago when Al was first commercially extracted from bauxite,an aluminum containing ore,

Accepted Answer

A) is essentially the same. 
B) is decreasing rapidly due to production of aluminum beverage containers. 
C) is decreasing, but more slowly recently due to interest in recycling. 
D) is actually increasing due to recycling efforts and more energy efficient production methods. 
A) is essentially the same. 
B) is decreasing rapidly due to production of aluminum beverage containers. 
C) is decreasing, but more slowly recently due to interest in recycling. 
D) is actually increasing due to recycling efforts and more energy efficient production methods.

Question 17

32 g of sulfur will react with 48 g of oxygen to produce 80 g of sulfur trioxide.If 16 g of sulfur and 100 g of oxygen are placed into a sealed container and allowed to react,what is the mass of the material in the container after the reaction is completed?

Accepted Answer

A) 40 g 
B) 16 g 
C) 100 g 
D) 116 g 
A) 40 g 
B) 16 g 
C) 100 g 
D) 116 g

Question 18

Dalton explained the Law of Conservation of Mass by stating that atoms are neither created nor destroyed in a chemical reaction.Dalton's explanation is an example of a scientific

Accepted Answer

A) theory. 
B) law. 
C) hypothesis. 
D) experiment. 
A) theory. 
B) law. 
C) hypothesis. 
D) experiment.

Question 19

There is no difference between the hazard posed by an element when it is in a compound or by itself.

Accepted Answer

A) True 
 B)False

Question 20

Assume that you have a new "triad" of elements (A,B and C)with similar properties.A is the smallest element and has a mass of 30 u.C is the largest element and has a mass of 90 u.The mass of B would be approximately ________ u.

Accepted Answer

A)  40 
B)  45 
C)  60 
D)  80 
A)  40 
B)  45 
C)  60 
D)  80

Exam 2: Atoms

In plentiful air,3.0 parts of carbon react with 8.0 parts of oxygen to form carbon dioxide.How much carbon is required to react with 1100 g of oxygen?

What is the name of the Russian chemist who was a pioneer in the development of the periodic law?

When 10.00 g of lead and 1.56 grams of sulfur react,11.56 g of lead sulfide is produced.Suppose 30.00 g of lead and 1.56 g of sulfur are allowed to react.Analysis of the reaction mixture would show

Leucippus and Democritus believed that all of the following statements about matter were true EXCEPT

Mendeleev arranged the elements in his periodic table solely in order of increasing atomic mass.

How many grams of carbon are in 20.0 grams of CH₄?

What is the significance of the Law of Conservation of Mass in waste disposal?

Lavoisier measured the mass of substances before and after chemical reactions and summarized his observations in a(n)

We cannot destroy atoms.Thus,it is possible to reclaim and recycle all materials.

Which of the following can be broken down into simpler substances?

Mendeleev was the first person to attempt to arrange the elements in a systematic order.

Which one of the following is NOT part of Dalton's atomic theory?

Nitrogen forms a number of different compounds with oxygen,depending upon the experimental conditions.This type of observation concerning the behavior of matter is summarized by

Hydrogen peroxide decomposes into water and oxygen when exposed to heat or light.A tightly capped bottle of hydrogen peroxide is placed on a mass scale (a balance)and exposed to light for three weeks.The mass reading on the scale does not change.This is an example of

Heptane is always composed of 84.0% carbon and 16.0% hydrogen.This illustrates the Law of

The amount of aluminum on the earth today relative to the amount 100 years ago when Al was first commercially extracted from bauxite,an aluminum containing ore,

32 g of sulfur will react with 48 g of oxygen to produce 80 g of sulfur trioxide.If 16 g of sulfur and 100 g of oxygen are placed into a sealed container and allowed to react,what is the mass of the material in the container after the reaction is completed?

Dalton explained the Law of Conservation of Mass by stating that atoms are neither created nor destroyed in a chemical reaction.Dalton's explanation is an example of a scientific

There is no difference between the hazard posed by an element when it is in a compound or by itself.

Assume that you have a new "triad" of elements (A,B and C)with similar properties.A is the smallest element and has a mass of 30 u.C is the largest element and has a mass of 90 u.The mass of B would be approximately ________ u.

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