Chemistry April Review

Unit 1

100

What is the density of a 25 gram cube with side lengths of 5 cm? 

0.2 grams/cm³

200

How many valence electrons does oxygen (O) have? 

6

300

What is the oxidation state of Strontium (Sr)?

+2

400

What is the oxidation state of silver (Ag) in this compound, Ag(NO₃)?

+1

500

What is the electron configuration of Vanadium (V)?

1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d³

Unit 2

100

Sort the electronegativity of the following atoms from highest to lowest
Iodine, Sulfur, Argon, Fluorine 

F,S,I,Ar

200

Draw out the molecular geometry of NH3 and name it

NH3 is trigonal pyramidal 

300

What is the intramolecular force and intermolecular forces involves in H2O

intra- covalent

inter-hydrogen bonding

400

Draw out and name the shape, name the intermolecular and intramolecular force for the following molecule
CH4

Shape: tetrahedral
intermolecular: covalent
intramolecular: london dispersion 

500

Are the bonds in these molecules polar covalent or nonpolar covalent
N2
HF
F2
B2O3
FCl

N2 is nonpolar
HF is polar
F2 is nonpolar
B2O3 is polar 
FCl is non polar 

Unit 3

100

What is 324^oF in Celsius and Kelvin?

162.2^oC

435.2 K

200

CaCO₃ decomposes at 1200^o C to form CO₂ gas and CaO. If 25 L of CO₂ are collected at 1200^o C, what will the volume of this gas be after it cools to 25^oC?

V = 5.05 L

300

6.0 L of gas in a piston at a pressure of 1.0 atm are compressed until the volume is 3.5 L. What is the new pressure inside the piston? 

1.71 atm

400

If 3.7 moles of propane are at a temperature of 28^oC and are under 154.2 kPa of pressure, what volume does the sample occupy?

V = 60.04 L

500

At 137^oC and under a pressure of 3.11 atm, a 276 gram sample of an unknown noble gas occupies 13.46 L of space. What is the gas?

Radon (222.04 g/mol)

Unit 4

100

What is the molarity of a solution that has .4 moles of NaCl in 500 ml of water. Include units 

.8 M

200

What type of reaction is shown below
2H2O-> 2H2 + O2

decomposition

300

Predict the products of the following reactants

HCl + NaOH ->

HCl + NaOH -> NaCl + H2O

400

Predict the products
Cu(s) + MgCl2 (aq) ->

NO REACTION! Copper is less reactive than magnesium 

500

Balance the following equations
CH3CH2CH2CH3 + O2 --> CO2 +H20

2CH3CH2CH2CH3 + 13O2 --> 8CO2 +10H20

Unit Conversions

100

You have 147 grams of Salt (NaCl), how many moles of salt do you have? 

n = 2.52

200

How many seconds are there in a year? 

1 year = 365 day 

1 day = 24 hours 

1 hour = 60 minutes 

1 minute = 60 seconds 

3,153,600 seconds 

300

What is the density of common antifreeze in units of g/mL? A 4.00 qt sample of the anti freeze weighs 9.26 lbs.

1lb = 453.59 grams 

1 L = 1.057 qts 

1 L = 1,000 mL

1.11 g/mL 

400

In PE class, Mr. Hintz measured the circumference of Ben Pumpiniron’s flexed biceps to be 34.8 inches. Given that 12 in = 1 ft and 3.28 ft = 1 m, calculate the circumference in millimeters.

883 mm

500

A car is traveling at 60 miles per hour, and you want to find out how many inches per second it is moving. Use the following conversion factors:

• 1 mile = 5280 feet

• 1 foot = 12 inches

• 1 hour = 3600 seconds

1056 in/sec