CHEMPARDY!

Module 2

100

Is Br a metal or a nonmetal?

Nonmetal

200

Is PH₃ a covalent molecule?

Nopers.

300

What is the chemical formula of a molecule that is made up of 12 carbon atoms, 24 hydrogen atoms, 10 oxygen atoms, and 2 sulfur atoms?

C₁₂H₂₄O₁₀S₂

400

What is the chemical formula for tetranitrogen hexahydride?

N₄H₆

500

To burn a piece of wood, oxygen gas has to be added. Ash, carbon dioxide, and water are products of the burning process. If 3.8 kg of oxygen gas is used to burn a piece of wood, then what was the mass of the wood if a chemist collects 3.12 kg water, 925 g of ash, and 15.14 kg of carbon dioxide?

15.4 kg of wood

Module 3

100

What is the number of neutrons in the atom ²²Ne?

12 neutrons

200

What is the symbol of the atom made up of 6 protons, 8 neutrons, and 6 electrons?

¹⁴C

300

If a light wave has a wavelength of 712 nm, what is its energy?

2.8 x 10^-19 Joules

400

One electron is in a 2s orbital, while another is in a 3p orbital. Which has the higher energy? 

The 3p orbital has the higher energy

500

Give the full electron configuration of N

1s² 2s² 2p³

Module 4

100

Which atom gives up its electrons most easily: B or In?

In

200

Order the following atoms in terms of increasing ionization energy: Sr, I, Sb

Sr < Sb < I

300

Draw the Lewis structure for the atom Ge

TBD

400

Order the following atoms in terms of increasing atomic radius: As, K, Br, Se

Br < Se < As < K

500

Draw the Lewis Structure for PCl₃

TBD

Module 5

100

Is MgCl₂ ionic, polar covalent, or nonpolar covalent?

Ionic compound

200

Name the following compound: (NH₄)₂O

Ammonium oxide

300

Give the chemical formula for potassium sulfite

K₂SO₃

400

What is the shape and bond angle of PCl₃?

Pyramidal with a bond angle of 107°

500

What is the shape and bond angle of OF₂?

Bent with a bond angle of 105°

Module 6

100

Dry ice turns into gas. Is this a physical or a chemical change?

Physical change

200

Is the following equation balanced? CaF₂ + 2NH₄Cl —> CaCl₂ + NH₄F

Nopity nopity nope

300

Lead has a density of 11.4 grams per mL. If you make a statue out of 3.45 L of lead, what is the statue's mass?

3.93 x 10⁴ g

400

Balance the following equation: HCl + Zn —> ZnCl₂ + H₂

2HCl + Zn —> ZnCl₂ + H₂

500

In an automobile, nitrogen from the air reacts with oxygen in the engine to make nitrogen monoxide, a toxic pollutant. Write the balanced chemical equation for this reaction.

N₂ + O₂ —> 2NO