Chem 121 Review

Question 1

What is the molarity of a solution containing 69 g of NaCl FW 58.4 g/mol in a volume of 750mL?

Accepted Answer

1.58 M

Question 2

Gases will behave ideally under _______ temperature and relatively ________ pressure.

Accepted Answer

high, low

Question 3

What is the oxidation number of Cr in Cr2O7^2-

Accepted Answer

+6

Question 4

Which formula below is the perchlorate ion?

Accepted Answer

ClO4-

Question 5

What is the correct name for this formula, CaCO3?

Accepted Answer

Calcium Carbonate

Question 6

What is the correct name for H2SO4

Accepted Answer

Sulfuric acid

Question 7

Does BF3 violate the octet rule?

Accepted Answer

Yes

Question 8

In general, as you go down a particular group what happens to the atomic radius?

Accepted Answer

increases

Question 9

How many moles of chloride ions are there in 0.500 L of a 0.643 M solution of AlCl3?

Accepted Answer

0.965

Question 10

Is the shape for IF3 the same as its electron domain geometry?

Accepted Answer

No

Question 11

If your delta H = -822.16 kJ This is a _____ reaction and heat is being _____

Accepted Answer

exothermic; released

Question 12

what is the electron domain geometry of PF5?

Accepted Answer

Trigonal Bipyramidal

Question 13

How many resonance structures does COCl2 have?

Accepted Answer

3

Question 14

Which of the following molecular formulas is also an empirical formula?

Accepted Answer

NH3

Question 15

Triple bonds are _____ than single bonds

Accepted Answer

Stronger

Question 16

What is the mass of one liter of mercury? (density = 13.7 g/mL)

Accepted Answer

13700 g

Question 17

How many unpaired electrons does a Oxygen atom have?

Accepted Answer

2

Question 18

What is the maximum number of electrons that the D subshell can hold?

Accepted Answer

10

Question 19

Which of the following is a weak acid?

Accepted Answer

HC2H3O2

Question 20

What is the gas that forms when iron reacts with excess HBr?

Accepted Answer

H2

Question 21

Which of the following is a physical change?

Accepted Answer

A glass of water evaporating

Question 22

If Fe goes to Fe^2+ was it:

Accepted Answer

Oxidized

Question 23

What is the formal charge on carbon in NCO^-

Accepted Answer

0

Question 24

What is the percent by mass of C in C3H6O3?

Accepted Answer

41%

Question 25

The S.H. of H2O is 4.184 J/gC. Calculate the heat for 12.8g of water warming from 40 C to 67C.

Accepted Answer

1.45 kJ

Question 26

The density of a gas is 1.25 g/L at 1.00 atm & 0 C. What is the best choice for the ID of gas?

Accepted Answer

N2

Question 27

Which of the following is a metalloid?

Accepted Answer

B

Question 28

Which form of electromagnetic radiation below has the longest wavelength?

Accepted Answer

infrared

Question 29

What is the correct name for HBrO

Accepted Answer

Hydrobromous acid

Question 30

Which is the ground state electron configuration of a Copper atom?

Accepted Answer

[Ar]4s^1 3d^10

Question 31

Calculate the energy of a single photon of orange light with a wavelength of 640 nm.

Accepted Answer

3.10 x 10^-19 J

Question 32

What is the correct element for sodium?

Accepted Answer

Na

Question 33

What orbital is specified by the following quantum numbers: n = 4 and l = 2?

Accepted Answer

4d

Question 34

The pressure inside a gas cylinder is 136 atm at 25 C. What's the pressure inside at -20 C?

Accepted Answer

115 atm

Question 35

Which of the following forms an ion-dipole

Accepted Answer

H2O and CsI

Question 36

What is the charge of nitrogen?

Accepted Answer

3-

Chem 121 Review

Questions 36

Chem 121 Review

Questions 36