Chemistry Pes

All of the following diatomic gases have LDF as their only source of intermolecular attraction. Which gas would be expected to have the highest boiling point?

• oxygen

• nitrogen

• hydrogen

• chlorine

Which of the following arranges the molecules N2, O2, and F2 in order of their bond enthalpies from least to greatest?

• F2< O2 < N2

• O2 < N2 < F2

• N2 < O2 < F2

• N 2 < F2 < O2

Pentacarbonyl iron reacts with phosphorus trifluoride and hydrogen according to the reaction:

Fe(CO)5 +2PF3 +H2 --> Fe(CO)2(PF)2(H)2 +3CO

The reaction of 5.0 mol of Fe(CO05, 8.0 mol of PF3, and 6.0 mol of H2 will release ____ mole of CO.

• 12

• 15

• 6.0

• 3.0

Tags

NGSS.HS-PS1-7

A small amount of table salt and a small amount of carbon tetrachloride are added to a beaker of benzene and the contents are stirred. Which of the labeled diagrams above best represents the state of the beaker's contents five minutes after stirring?

• a

• b

• c

• d

Tags

NGSS.MS-PS1-2

The diagram above shows the PES for an element in the third period of the periodic table. The element represented is:

• sodium

• magnesium

• aluminum

• silicon

Tags

NGSS.HS-PS1-1

In the diagram above, the peak that represents the 3s electron is:

• peak a

• peak b

• peak c

• peak d

Tags

NGSS.HS-PS1-1

the average kinetic energy of the gas molecule is:

• greatest in container a

• greatest in container b

• greatest in container c

• the same in all three containers

Tags

NGSS.HS-PS3-4

the gas with the highest average velocity of its molecules is:

• methane

• ethane

• butane

• all three gases have the same average velocity

the density of the gas, in g/L, is:

• greatest in container a

• greatest in container b

• greatest in container c

• the same in all three containers

If the pressure of each gas is increased at constant temperature until condensation occurs, which gas will condense at the lowest pressure?

• methane

• ethane

• butane

• all three gases will condense at the same pressure