A neutral atom of ^ has

4 protons, 7 neutrons, and 4 electrons

4 protons, 15 neutrons, and 4 electrons

4 protons, 4 neutrons, and 4 electrons

11 protons, 7 neutrons, and 11 electrons

What is the full electron configuration for bromine?

1 s 2 2 s 2 2 p 6 3 s 2 3 p 6 4 s 2 3 d 10 4 p 5

1 s 2 2 s 2 2 p 6 3 s 2 3 p 6 4 s 2 3 d 10 4 p 2

1 s 2 2 s 2 2 p 6 3 s 2 3 p 6 4 s 2 4 p 5

How is the following Lewis dot symbol incorrect:

There are not enough valence electrons present.

The Lewis dot symbol is drawn correctly.

There are too many valence electrons present.

Which bond would you expect to have the highest bond energy (i.e., the strongest bond)?

All of the bonds would have the same energy, because they are all bonds between nitrogen atoms.

Considering the following chemical reaction: 4 Al(s) + 3 O 2 (g) ⟶ 2 Al 2 O 3 . Which of the following statements are false ?

The reaction of 1 mole of Al will produce 1/4 mole of Al 2 O 3 .

The reaction of one mole of aluminum requires 3/4 mole of oxygen gas to completely react with it.

The reaction of 26.98 g of aluminum will produce 0.5 mole of Al 2 O 3 .

In order to produce 101.96 grams of aluminum oxide, you must begin with 1.5 moles of O 2 .

Consider the following chemical reaction: N 2 + 3 H 2 ⟶ 2 NH 3 . Which of the following statements is false?

The reaction of three moles of hydrogen gas will produce 17.04 g of ammonia.

The reaction of one mole of H 2 will produce 2/3 moles of NH 3 .

The reaction of two moles of N 2 will produce four moles of NH 3 .

The reaction of 28.02 g of nitrogen gas will produce 2 moles of ammonia.

Consider the following equation describing the reaction of 5.4 grams of boron with 6.7 grams of oxygen gas (O 2 ) to form diboron trioxide: 4 B(s) + 3 O 2 (g) ⟶ 2 B 2 O 3 What is the excess reactant, and how much of that excess reactant remains, in grams?

Boron is excess; 2.4 g of boron remain

Oxygen is excess; 2.4 g of oxygen remain

Boron is excess; 3.0 g of boron remain

Oxygen is excess; 3.0 g of oxygen remain

Select the correct set of (unbalanced) products for the following reaction: Na 2 CO 3 ( aq ) + CuCl 2 ( aq ) ⟶

CuCO 3 ( s ) + Na ( s ) + Cl 2 ( g )

Cu ( s ) + CO 2 ( g ) + NaO ( aq ) + Cl 2 ( g )

Give the total ionic equation for the reaction (if any) that occurs when aqueous solutions of lithium sulfide and copper(II) nitrate are mixed.

2 Li + ( aq ) + S 2- ( aq ) + Cu 2+ ( aq ) + 2 NO 3 - ( aq ) ⟶ CuS ( s ) + 2 Li + ( aq ) + 2 NO 3 - ( aq )

Li + ( aq ) + S 2- ( aq ) + Cu 2+ ( aq ) + NO 3 - ( aq ) ⟶ CuS ( s ) + LiNO 3 ( aq )

Li + ( aq ) + SO 4 2- ( aq ) + Cu 2+ ( aq ) + NO 3 - ( aq ) ⟶ CuS ( s ) + Li + ( aq ) + NO 3 - ( aq )

Li + ( aq ) + S - ( aq ) + Cu 2+ ( aq ) + NO 3 - ( aq ) ⟶ CuS ( s ) + LiNO 3 ( aq )

CHEM 1410 Exam 1-4 Review

Authored by Mary Macalik

Chemistry

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MULTIPLE CHOICE QUESTION

15 mins • 1 pt

Select the answer that expresses the result of this calculation with the correct number of significant figures:
32.220 x 32.022
4.68

220.46

220

220.

220.5

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

The mass of a sample is 7.60x10^-4kg. What is the mass in mg?

7.60x10⁶ mg

7.60x10² mg

7.60x10^-1mg

7.60x10^-10 mg

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

A volume of a sample is 5.98x10^-2 kL. How many mL is this?

5.98x10¹ mL

5.98x10^-5 mL

5.98x10⁴ mL

5.98x10^-8 mL

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

Which of the following represents a chemical change to a substance?

creating table salt from solid sodium and chlorine gas

freezing popsicles

boiling water

chopping firewood

The density of silver is 10.5g/cm^3. What is the mass of a cube of silver measuring 2.62 cm by 4.87 cm by 8.91 cm?

172 g

1190 g

0.923 g

10.8 g

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

What is the average atomic mass of an element with the following isotopic abundances:

68.06 amu

67.25 amu

68.00 amu

68.93 amu

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

How many neutrons are present in an atom of hydrogen-3?

not enough information

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CHEM 1410 Exam 1-4 Review

Select the answer that expresses the result of this calculation with the correct number of significant figures:
32.220 x 32.022
4.68

The mass of a sample is 7.60x10^-4kg. What is the mass in mg?

A volume of a sample is 5.98x10^-2 kL. How many mL is this?

Which of the following represents a chemical change to a substance?

The density of silver is 10.5g/cm^3. What is the mass of a cube of silver measuring 2.62 cm by 4.87 cm by 8.91 cm?

What is the average atomic mass of an element with the following isotopic abundances:

How many neutrons are present in an atom of hydrogen-3?

A neutral atom of ^ has

Oxygen is in which family/group?

What is the third element down in the alkaline earths?

Access all questions and much more by creating a free account

Similar Resources on Wayground

Popular Resources on Wayground

Discover more resources for Chemistry

CHEM 1410 Exam 1-4 Review

Select the answer that expresses the result of this calculation with the correct number of significant figures:32.220 x 32.0224.68

The mass of a sample is 7.60x10-4kg. What is the mass in mg?

A volume of a sample is 5.98x10-2 kL. How many mL is this?

Which of the following represents a chemical change to a substance?

The density of silver is 10.5g/cm^3. What is the mass of a cube of silver measuring 2.62 cm by 4.87 cm by 8.91 cm?

What is the average atomic mass of an element with the following isotopic abundances:

How many neutrons are present in an atom of hydrogen-3?

A neutral atom of ^ has

Oxygen is in which family/group?

What is the third element down in the alkaline earths?

Access all questions and much more by creating a free account

Similar Resources on Wayground

Popular Resources on Wayground

Discover more resources for Chemistry

Select the answer that expresses the result of this calculation with the correct number of significant figures:
32.220 x 32.022
4.68

The mass of a sample is 7.60x10^-4kg. What is the mass in mg?

A volume of a sample is 5.98x10^-2 kL. How many mL is this?