Chemistry Review PASS

SI Conversions

100

Convert 240 cm to m

2.40 m

200

Convert 45 kg to g

45000 g or 4.50x10⁴ g

300

Convert 650 nm to m

6.50x10^-7 m

400

Convert 5.6x10^-3 g to µg

5600 µg

500

Convert 563 µL to kL

5.63x10^-7 kL

Stoichiometry

100

What is the molar mass of potassium sulfide (K₂S)

110.262 g/mol

200

Analysis of a compound shows that it contains 3.75 moles of C, 7.50 moles of H, and
1.25 moles of N. What is its empirical formula?

C₃H₆N

300

Under appropriate conditions, nitrogen and hydrogen undergo a combination reaction to yield ammonia:
N₂ (g) + 3H₂ (g) → 2NH₃ (g)
A 9.3-g sample of H₂ requires ____________ g of N₂ for a complete reaction

43 g of N₂

400

You have a 5.00 g sample of a compound containing only carbon (C), hydrogen (H), and oxygen (O). Upon combustion, it produces 8.80 g of CO₂ and 3.60 g of H₂O. What is the mass percent of oxygen in the original compound? 

MM of CO₂ = 44.01 g/mol, MM of H₂O = 18.02 g/mol

44% Oxygen

500

How many atoms of Hydrogen are there in 27.45 mL of Butanol (C₄H₁₀O). MM = 74.14 g/mol, d = 0.81 g/mL, av. # = 6.022*10²³ atoms/mol

1.81*10²⁴ Hydrogen atoms

Chemical Naming

100

What is the formula for Strontium Fluoride

SrF₂

200

What is the name of N₂O₅

Dinitrogen Pentoxide

300

What is the name of P₄S₁₀

Tetraphosphorus Decasulfide

400

What is the name of Fe₂O₃

Iron(III)oxide

500

What is the formula for Ammonium Phosphate

(NH₄)₃PO₄

Balancing

100

This is the law that states matter cannot be created or destroyed in a chemical reaction, making balancing equations necessary.

Law of Conservation of Mass

200

Balance the following equation 

__ H₂ + __ O₂ → __ H₂O

2 H₂ + 1 O₂ → 2 H₂O

300

Balance the following equation

CH₄ + O₂ → CO₂ + H₂O  

CH₄ + 2 O₂ → CO₂ + 2 H₂O

400

Balance the following equation

KClO₃ → KCl + O₂

2 KClO₃ → 2 KCl + 3 O₂

500

Balance the following equation

H₂SO₄ + NaOH → Na₂SO₄ + H₂O

H₂SO₄ + 2 NaOH → Na₂SO₄ + 2 H₂O  

Periodic Table and Ions

100

F, Cl, I, and Br are all considered_________

Halogens

200

Magnesium is a ______ metal, when it becomes an ion it gains a (-/+) ______ charge, this makes it a ______.

Alkaline Earth, +2, cation

300

Nitrogen is a ________, when it becomes an ion it gains a (-/+)_______charge, this makes it a _________.

Nonmetal, -3, anion

400

Magnesium forms Mg²⁺, and phosphate is PO₄^3-. What is the correct formula for magnesium phosphate?

Mg₃(PO₄)₂

500

What are the ions that compose the following ionic compound?

(NH₄)₂SO₄

NH₄⁺ (Ammonium) and SO₄^2- (Sulfate)