Chemistry Semester 1 Review

Unit 1 (matter, uncertainties, and dimensional analysis)

100

Classify pure NaCl as an element, compound, or mixture

compound

200

The uncertainty associated with measuring the same value correctly a number of times and getting slightly different values

Random Uncertainty

300

The number of significant figures for 0.033000

5

400

What is the answer (use correct significant figures, scientific notation, and units)?

3.27 x 10⁴ g - 1.45 x 10³ g

3.13 x 10⁴ g

500

Correct answer includes appropriate sig figs and units

Convert 3.27 kg/m³ to mL/inch³

1kg = 1000g; 1g = 1 mL, 1m = 100 cm, 2.54 cm = 1 inch

0.0536 mL/inch³

Unit 2 (atoms and electrons)

100

The number of protons, neutrons, and electrons associated with a neutral atom of cobalt

p = 27, e = 27, n = 32

200

The electron configuration of Br-

1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶

300

Name of the type of orbital with three distinct orbitals that are each shaped like dumbbells on the x, y, and z axis

p orbitals

400

The number of protons, neutrons, and electrons associated with ¹²⁶I^-

p = 53, n = 73, e = 54

500

The name of the technique used to measure different isotopes of atoms

Mass Spectrometry

Unit 3 (bonding)

100

Type of compound when a metal bonds with a non-metal

Ionic 

200

Name of this compound and type of bonding present:

S₂O₃

covalent

disulfur trioxide

300

The actual particles associated with the bonding in metallic bonds

Positive cations and sea of delocalized electrons

400

Charge balanced compound associated with Zinc (II) phosphate

Zn₃(PO₄)₂

500

Full list of types of compounds that conduct electricity with the associated phases

Metals (all)

Ionic (dissolved or molten)

Unit 3 (Lewis, VSEPR, and IMF)

100

Lewis structure of CH₄

Correct drawing

200

VSEPR geometry of AlF3

Trigonal Planar

300

Bond polarity and molecular polarity of BeCl₂

Polar bonds, non-polar molecule

400

Requirement for hydrogen bonding to occur

H directly bonded to either F, N, or O

500

Has highest boiling point: N₂, O₂, S₂

List all IMF present

S₂, LDF only

Unit 4 (Molar Mass and calculations)

100

Molar mass of CH₄

16.05 g/mol

200

Number of oxygen atoms per formula unit of Fe(OH)₂(NO₂).3H₂O

NOTE dot doesn't work well in this, so the dot is a period above

7 oxygen atoms

300

How many grams in 3.4 moles of MgCl₂

323.72 grams MgCl₂

Answer must include units and chemical name

400

Number of molecules in 6.7 moles of H₂O (Avogadro's number is 6.02 x 10²³ particles/mol)

4.03 x 10²⁴ molecules of H₂O

correct answer must include units and chemical name

500

Number of oxygen atoms in 53 grams of Al(OH)₃.5H₂O (Avogadro's number is 6.02 x 10²³ particles/mol)

1.52 x 10²⁴ atoms of O

correct answer must include units and chemical name