Chemistry 0110

Thermochem

100

What is heat measured in?

Joules

200

What is entropy?

- S

- disorder

Redox

100

What is the oxidation number of oxygen?

-2

200

What is a reducing agent?

The element that becomes oxidized and loses electrons

Quantum

100

What is the unit for frequency?

Hertz (Hz)

200

Describe the wavelength & frequency of X-rays compared to visible light?

- Higher frequency

- Shorter wavelength

300

What is Heisenburg's uncertainty principle?

We cannot know both the position and speed of a particle, such as a photon or electron. The more you know about one component, the less you know about the other.

400

Write the electron configuration of Pb

[Xe]4f¹⁴5d¹⁰6s²6p²

500

What is the energy of a wave with 455 nm of radiation?

lkjl

Moles

100

How do I find moles?

n = m/M

200

What is a limiting reactant?

A reactant that is totally consumed when the chemical reaction is completed. Controls the reaction because amount of product formed is limited by this reagent 

300

Balance the following reaction:

SO3 (g) --> SO2 (g) + O2 (g)

2SO3 (g) --> 2SO2 (g) + O2 (g

400

Write balanced chemical reactions to represent: the decomposition, by heating, of solid ammonium nitrate to produce dinitrogen monoxide
gas (laughing gas) and water vapor

NH4NO3 (s) -∆-> N2O (g) + 2H2O (g)

500

What are the molarities of the following solutions when dissolved in water?

5.2 g CO(NH2)2 in 275 mL of solution

1.53 M

Foundations

100

Is an iron spoon that is silver plated a substance or a mixture. If it is a mixture, indicate whether it is homogenous or heterogeneous

Heterogenous mixture 

200

How many sig figs in the following?

24.6 + 18.35 -2.98 = ?

3 (ans = 40.0)

300

Perform the following conversion:

981 cm^3 = _____ L

0.981 L

400

Why is francium the largest atom on the periodic table?

- atomic radius

- electron affinity

500

Give the chemical formula for the following: Tungsten (II) hypochlorite

W(ClO)2