Stoichiometry and Equations

Stoichiometry 1

100

5 grams of Carbon is how many moles?

0.416 moles of Carbon

(5 g C/12.01g C)

200

How many grams of Cs are in 1 mole of Cs?

132.9 grams of Cs

300

13.7 grams of NaCl has how many moles of NaCl?

0.234 moles of NaCl

13.7 g NaCl/(23Na+Cl35.5)

400

How many particles of Carbon are in 12 grams of Triacontane (C₃₀H₆₂)?

5.14 E 23 particles of Carbon

12g C30H62(1mol C30H62/422g C30H62)(30 mol C/1mol C30H62)(6.02X10^23/1 mol C)

30x12 = 360 + 62x1 = 422 g

500

1.77 grams of (NH₄)₃PO₄ is how many moles of NH₄?

0.0356 moles of NH₄

Stoichiometry 2

100

How many grams are in 1.05 moles of Mg?

25.53 grams

200

How many atoms of Ca and how many atoms of O are in 1 mole of CaO?

6.022 E 23 particles of Ca

6.022 E 23 particles of O

300

0.151 moles of Copper (II) Oxide is how many grams?

12 grams of Copper (II) Oxide

400

3.5 grams of Zirconium (IV) Oxide is how many moles?

0.0284 moles of Zirconium (IV) Oxide

Zr4+ + 2O2- = ZrO2

molar mass = 91.22 +32 = 123.22 g/mol

500

How many grams of Silicon are in 7.35 E 10 particles of Silicon?

3.43 E -12 grams of silicon

Bonding

100

In this type of bonding, electrons are free to move around.

What is Metallic Bonding?

200

The melting points for ionic compounds are usually this...

What is high

300

Ionic bonds have these 3 main properties...

What is conductive when dissolved, hard, brittle, crystal lattice structure, high melting and boiling point, what is strong electrolyte

400

These are 3 properties of covalent bonds.

What is low melting and boiling points, nonelectrolytes, brittle, solid, liquid, and gas, nonmetals only, nonconductive

500

Ionic bonds occur when ________ happens, but covalent bonds occur when _________ happens

What is valence electrons transfer and valence electrons are shared.

Balancing Equations

100

Balance this equation:

Na + Cl₂ → NaCl

2 Na + Cl₂ → 2 NaCl

200

H₂ + F₂ → HF

H₂ + F₂ → 2 HF

300

C₆H₁₂O₆ + O₂ → H₂O + CO₂

C₆H₁₂O₆ + 6 O₂ → 6 H₂O + 6 CO₂

400

C₄H₉OH + HBr → C₄H₉Br + H₂O

C₄H₉OH + HBr → C₄H₉Br + H₂O

Its already balanced!

500

C₇H₁₇ + O₂ → CO₂ + H₂O

2 C₇H₁₇ + 22 1/2 O₂ → 14 CO₂ + 17 H₂O

or

4 C₇H₁₇ + 45 O₂ → 28 CO₂ + 34 H₂O

Lewis dot structure

100

Draw the Lewis dot for O^2-

What is 8 dots around oxygen

200

The Lewis Dot Structure of Antimony.

what is 5 dots around Sb

300

The Lewis Dot Structure of NH₃

3 H around 1 N with 2 unpaired electrons

400

Number of Valence electrons in the 18th column (INCLUDE THE EXCEPTION).

What is 8 except for He which has only 2

500

The Lewis Dot Structure for HCN

1 H single bond C triple bond N 1 paired electrons