Science Chapter 12

1.

1 point

A nonpolar covalent bond forms when electrons are shared _____ between atoms

Equally

Unequally

2.

1 point

What is the molarity of 76 g of NaCl dissolved to make 1 L of solution?

7.6 M

1.3 M

7.2 M

1.9 M

3.

1 point

If a crystal of solute drops to the bottom of a container of solvent, the solution is...

strong

mixed thoroughly

saturated

concentrated

4.

1 point

What makes neon (Ne) a stable element?

Its outer energy level is filled with electrons

Its atomic mass

Stability randomly changes between atoms

The fact that it is a gas at room temperature

5.

1 point

Water has a surprisingly high boiling point because...

of the strong attractions between polar water molecules

hydrogen and oxygen form single covalent bonds

of the high amount of water vapor in the atmosphere

water molecules are not very massive

6.

1 point

When temperature increases, what happens to the solution?

Its solubility decreases

It becomes saturated

It is concentrated

Its solubility increases

7.

1 point

To calculate the molarity of a solution, divide the moles of solute by what?

Grams of solute

Liters of solvent

Kilograms of solute

Liters of solution

8.

1 point

When sugar is dissolved in water, sugar is the ______

9.

1 point

If there are two dashes between two atoms in a structural formula, molecules of the compound contain a(n) ____ bond

10.

1 point

In a polar covalent bond,

Electrons are shared unequally between atoms

Electrons are transferred between atoms

A cation bonds to an anion

Electrons are shared equally between atoms

11.

1 point

Which of the following usually results in a triple bond? (I cant type subscripts)

N2

SO3

O3

12.

1 point

How many moles of helium (He) is in 16 g of helium?

4 mol

16 mol

1 mol

8 mol

13.

1 point

The formation of an ionic bond involves what?

Transfer of electrons

Gain of neutrons

Sharing of electrons

Loss of protons

14.

1 point

The maximum amount of a solute that will dissolve in a certain amount of solvent at a given temperature is that solute's....

degree of saturation

solubility

concentration

rate of solution

15.

1 point

188 g of NaCl contains how many moles?

3.21 mol

25.21 mol

18.80 mol

6.83 mol

16.

1 point

A dot in an electron dot diagram represents what?