unit 1
unit 2
unit 3
unit 4
unit 5
100

How many significant digits in the following number?

0.0508

3

100

Name the following:

Na2CO3

Sodium Carbonate

100

Suppose you had 2.00 moles of solute dissolved into 1.00 L of solution. What's the molarity?

2.00M

100

Some students believe that teachers are full of hot air. If I inhale 2.2 liters
of gas at a temperature of 18 0 C and it heats to a temperature of 38 0 C in
my lungs, what is the new volume of the gas?

2.35 L

100

What are the shapes of s, p, and d orbitals respectively?

s= spherical 

p = dumbbell 

d = cloverleaf

200

Convert 231 grams into ounces.

8.14 g

200

Write the name for the following:

P4S5

tetraphosphorus pentasulfide

200

I have 345 mL of a 1.5 M NaCl solution. If I boil the water until the volume
of the solution is 250 mL, what will the molarity of the solution be?

2.07 M

200

A 35 L tank of oxygen is at 315 K with an internal pressure of 190 atmospheres. How
many moles of gas does the tank contain?

260 moles of gas

200

Write a set of quantum numbers for a 4f orbital

n = 4 

l = 3 

ml = 3, 2, 1, 0, -1, -2, -3




300

Solve the following with correct sig figs

3.8324 + 4.962

8.794

300

Convert the following to moles:
5. 3.01 x 1023 atoms Na

0.500moles

300

For the reaction 

2S(s) + 3O2(g) 2SO3(g) 

if 6.3 g of S is reacted with 10.0 g of O2 show by calculation which one will be the limiting reactant.

S is the limiting reactant

300

The density of a gas is measured at 1.853 g / L at 745.5 mmHg and 23.8 °C. What is its molar mass?

46.01 g/mol

300

Write the abbreviated electron configuration for Lawrencium

[Rn] 7s25f146d1

400

Identify if sugar water is a pure substance or a mixture, then whether it is an element, compound, heterogeneous, or homogeneous mixture.

Homogeneous mixture

400

balance the following equation:


AgNO3 +  Cu --> Cu(NO3)2 +  Ag

2 AgNO3 + 1 Cu --> 1 Cu(NO3)2 + 2 Ag

400

Given 

Ca(OH)2(s) + 2 HCl(aq) --> CaCl2(aq) + 2 H2O(l)

If I combined 15.0 grams of calcium hydroxide with 75.0 mL of 0.500 M
HCl, how many grams of calcium chloride would be formed?

2.08 grams

400

Calculate the enthalpy for the following reaction:
N2(g)+2O2(g)-->2NO2 (g) Δ H=???kJ
Using the following two equations:


N2(g)+O2(g)-->2NO(g) ΔH = +180kJ
2NO2 (g)-->2NO(g)+O2(g) ΔH= +112kJ

+68 kJ/mol

400

A laser emits green light with a wavelength of 515 nm.  Calculate the frequency of the light.

5.82 x 1014 s-1

OR

5.82 x 1014 Hz

500

Identify each of the following elements as a metal, a nonmetal, or a metalloid.

1.sodium 

2.chlorine 

3.silicon  

4.iron

5.  carbon

1.Metal

2.Non-metal 

3.metalloid

4.metal

5.non metal

500

I2 is produced by the reaction of 0.4235 mol of CuCl2 according to the following equation:

 2CuCl2+4KI → 2CuI+4KCl+I2

What mass of I2 is produced?

53.8 g I2

500
2 moles of propane reacts with 8 moles of oxygen gas in a reaction. How much of the excess reactant is left over?

C3H8 + 5 O2 --> 3CO2 + 4H2O


0.4 mol

500

How much heat will be released when 6.44 g of Sulfur reacts with excess O2 according to the following equation?
2 S + 3 O2 → 2SO3 ∆H° = -791.4kJ

-79.4kJ

500

Draw the Lewis structure for NO2-1

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