Dual Semester I Exam

Ch 1: Matter, Energy, and Measurement

100

This state of matter has a definite volume, but indefinite shape?

What is a liquid?

200

This is an example of an extensive property.

What is mass, volume, enthalpy

300

A certain solid has a density of 23.6 g/mL. What would the mass (in Kg) be for 987 cm³ of this solid?

What is 23.3 kg.

400

How close a measurement is to the true value.

What is accuracy.

500

Calculate the following:  325.587 – 22.41

What is 303.18

Ch 2: Atoms, Molecules and Ions

100

The nucleus does not contain this subatomic particle.

What is an electron.

200

Name of SeO₂

What is selenium disulfide.

300

The periodic table is arranged this way.

What is in order of increasing atomic number? Also, what is in families by the same number of valence electrons?

400

Which has the greatest number of electrons: O²⁺, O⁺, O^-, or O^2-?

O^2-

500

Element X has 3 isotopes: X-25 (11.2%), X-26 (45.9%) and X-30 (42.9%). What is the average atomic mass of element X to the hundredths place?

What is 27.60 amu?

Ch 3: Chemical Reactions and Stoichiometry

100

This is the complete balanced equation when propane (C₃H₈) burns completely.

What is:

C₃H₈ + 5 O₂    →     3 CO₂ + 4 H₂O

200

AgNO₃  +  NaI        →    NaNO₃  +  AgI

This is an example of what type of reaction?

What is double replacement, or metathesis

300

This is the weight percentage of O in Al₂O_3.

What is 47.1%?

400

You go into the laboratory and separate an unknown compound into the following:  32.0 g C, 5.28 g H, and 42.72 g O. What is the empirical formula?

What is CH₂O?

500

A balanced equation for the synthesis of ammonia from it's elements.

What is:

N₂ + 3 H₂    →    2 NH₃

Ch 4: Reactions in Aqueous Solution

100

The correct net ionic equation of the neutralization reaction between hydrofluoric acid and sodium hydroxide in aqueous solution?

HF(aq)  +  OH^-(aq)        →    H₂O(l)  +  F^-(aq)

200

Which of the following is a weak electrolyte?

HF, Ca(NO)₂, H₂SO₄, KNO₃

What is HF?

300

List 5 strong acids (name and formula)

HCl         hydrochloric acid       HNO₃  nitric acid

HBr         hydrobromic acid      H₂SO₄  sulfuric acid

HI           hydroiodic acid

HClO₃      chloric acid

HClO₄      perchloric acid

400

The spectator ions when lithium hydroxide reacts with perchloric acid?

What are:

Li⁺ and ClO₄^-

500

This has the greatest total conc of ions present.

0.06 M HCl                  0.03 M Ca(NO₃)₂

0.05 M MgBr₂               0.03 M Al(NO₃)₃

What is:  0.05 M MgBr₂?

Ch 5: Thermochemistry

100

Energy is conserved during any (non nuclear) process.

What is the First Law of Thermodynamics?

200

This is the energy change when you add 50. kJ of energy to a system and it does 50. kJ of work on the surroundings.

What is 0 kJ.

300

This is endothermic.

sublimation, water freezing, water condensing

What is sublimation?

400

Considering the following equation, this is the enthalpy change per mole of O₃.

2O₃(g)    →    3O₂(g)        ΔH = -284.6 kJ

What is: -142.3 kJ/mol?

500

List 2 quantities that are state functions, and 2 quantities that are not state functions.

State functions: enthalpy (H), temperature, energy

Non state functions: work, heat