Chemitry 2

1.

1 point

The chemical formula for silver sulfate is

Ag3SO4.

Ag2SO4.

Ag(SO4)2.

AgSO4.

2.

1 point

When a fluorine atom reacts with a chlorine atom, the bond that forms between them should be

polar covalent.

nonpolar covalent.

ionic.

ionic covalent.

3.

1 point

20) The shape of a water molecule is

tetrahedral.

trigonal planar.

bent.

linear.

4.

1 point

If a central atom has a total of three electron sets and no lone pairs attached to it, the geometry about the central atom is

tetrahedral.

pyramidal.

trigonal planar.

linear.

5.

1 point

The formula for the compound calcium bromide is

CaBr2.

Ca2Br.

Ca3Br2.

CaBr.

6.

1 point

When two chlorine atoms combine with each other, the bond that forms is

nonpolar covalent.

polar covalent.

ionic covalent.

ionic.

7.

1 point

How many molecules are in 237 g (about a cup) of water?

4267

13.1

6.02 × 1023

7.92 × 1024

8.

1 point

The attraction between positive and negative ions is known as a(n)

crystal bond.

covalent bond.

ionic bond.

molecular bond

9.

1 point

9) A iodide ion is

I+.

I2-.

I2+.

I-.

10.

1 point

A sodium ion, Na+, has the same electron configuration as a(n)

argon atom.

neon atom

sodium atom.

chlorine atom.

11.

1 point

Which substance has ionic bonds?

SO3

CI4

K2S

N2

12.

1 point

Nitroglycerin has a formula C3H5(NO3)3. The molar mass of nitroglycerin is

309 g/mole.

227 g/mole.

398 g/mole.

65 g/mole.

13.

1 point

The inertness of the noble gases is due to

the bonds they form with other elements.

the number of protons and neutrons.

the outermost shell has an octet of electrons, except for helium which has two electrons.

the outermost shell has six electrons.

14.

1 point

19) If a central atom has a total of three electron sets and no lone pairs attached to it, the geometry about the central atom is

trigonal planar.

linear.

triple covalent bond.

pyramidal.

15.

1 point

Atoms and molecules with odd numbers of electrons are called

odd.

free radicals.

covalent.

ions.

16.

1 point

Which of the following molecules is polar?

CH2Cl2

O2

CO2

CCl4

17.

1 point

11) A covalent bond is formed when a pair of electrons is

shared.

destroyed.

split.

transferred.

18.

1 point

15) The formula of iron(II) phosphate is

Fe2PO4.

FePO4.

Fe3(PO4)2.

Fe2(PO4)3.

19.

1 point

The valence shell electron pair repulsion theory (VSEPR) is used to

predict the number of multiple bonds in a molecule.

predict the bonding pattern in molecules.

predict the electronegativity of atoms.

predict the three dimensional structure of molecules.

20.

1 point

Which of the following has the same number of atoms as 35.4 g of chlorine?

12 g of carbon

35.4 g of germanium

18 g of water

19 g of potassium

21.

1 point

If two atoms from the same element share three pairs of electrons in forming a molecule the bond is called a

coordinate covalent bond.

single covalent bond.

triple covalent bond.

double covalent bond.

22.

1 point

Which is the electron dot structure of magnesium?

Mg 1 dot

Mg three dots

Mg

Mg two dots

23.

1 point

When barium reacts with iodine, barium ions, Ba2+, and iodide ions, I-, are formed. In this reaction, iodine atoms

gain protons.

lose protons.

lose electrons.

gain electrons.

24.

1 point

Calculate the number of moles of sodium hydroxide present in 300 mL of a 2.0 M solution of sodium hydroxide.

600 moles of sodium hydroxide

300 moles of sodium hydroxide

0.60 moles of sodium hydroxide

2.0 moles of sodium hydroxide

25.

1 point

When 2 liter of nitrogen gas reacts with 6 liters of hydrogen gas at constant temperature and pressure, how many liters of ammonia gas will be produced?

2

4

6

8

26.

1 point

When 15 mL of ethanol is mixed with 55 mL of water, ethanol is the solute.

True

False

27.

1 point

When the equation below is balanced, the coefficient of silver is:
Cu + AgNO3 → Cu(NO3)2 + Ag

0

1

2

3

28.

1 point

) Octane (C8H18 ) reacts with oxygen (O2) to form carbon dioxide (CO2) and water (H2O). When the equation below is balanced, the coefficient of octane is:

C8H18 + O2 → CO2 + H2O

25

8

16

2