Matter & Energy Chemistry

Chemical Formulas

100

The following water molecule is known as a 2H₂O?

Chemical Formula

200

The big number located in front of a chemical formula in called a?

Coefficient

300

The small number located on the bottom right of a chemical formula is know as a what?

Subscript

400

What does the coefficient tell you about a chemical formula?

2H₂O

The number of molecules of the formula

500

What does the subscript tell you about a chemical formula?

2H₂O

The number of atoms of an element

Parts of a Chemical Equation

100

What is this known as?

6CO₂ + 6H₂0 ---> C₆H₁₂O₆ + 6O₂

Chemical equation

200

The left side of the arrow is known as the? 

6CO₂ + 6H₂0 ---> C₆H₁₂O₆ + 6O₂

Reactants

300

The arrow is known as?

6CO₂ + 6H₂0 ---> C₆H₁₂O₆ + 6O₂

Yield

400

The right side of the arrow is known as? 

6CO₂ + 6H₂0 ---> C₆H₁₂O₆ + 6O₂

Products

500

A chemical equation is made of several different?

Chemical Formulas

Atoms, Elements, and Molecules

100

List the elements that make up the compound Cholesterol (C₂₇H₄₆O)

Carbon, Hydrogen, Oxygen

200

How many atoms of Chlorine are found in Epibatidine (C₁₁H₁₃ClN₂)

One

300

How many total atoms are found in Epibatidine (C₁₁H₁₃ClN₂)

27 atoms

400

How many molecules of Aspirin are represented below?

C₉H₈O₄

One 

500

How many total ATOMS, ELEMENTS, and MOLECULES are represented below?

3Mg(OH)₂

Atoms:15 Elements:3 Molecules:3

Balanced or Unbalanced Chemical Equations

100

1. Is the following chemical equation balanced or unbalanced? 

2. Does it follow the Law of Conservation of Mass?

O + C₂ --> CO₂

1. Balanced

2. Yes

200

1. Is the following chemical equation balanced or unbalanced? 

2. Does it follow the Law of Conservation of Mass?

KClO₃ --> KCl + O₂

1. Unbalanced

2. No

300

1. Is the following chemical equation balanced or unbalanced? 

2. Does it follow the Law of Conservation of Mass?

4Fe + 3O₂ ---> 2Fe₂O₃

1. Balanced

2. Yes

400

1. Is the following chemical equation balanced or unbalanced? 

2. Does it follow the Law of Conservation of Mass?

Ag₂O ---> Ag + O₂

1. Unbalanced

2. No

500

1. Is the following chemical equation balanced or unbalanced? 

2. Does it follow the Law of Conservation of Mass?

2Na₃PO₄ + 3CaCl₂ ---> 6NaCl + Ca₃(PO₄)₂

1. Balanced

2.Yes

Mass (g) Balanced or Unbalanced

100

What is the missing mass?

2AgI + Na₂S ---> Ag₂S + 2NaI

9g    +  4g   ---> ____g + 2g

11 grams

200

What is the missing mass?

TiCl4 + H₂O ---> TiO₂ + HCl

20g  +  5g   ---> 8g  + _____g

17 grams

300

What is the missing mass?

_____g of Na reacts with 71g of Cl₂ to produce 117g of NaCl

46 grams

400

What is the missing mass?

40g of Ca reacts with 71g of Cl₂ to produce _____g of CaCl₂

111 grams

500

What is the missing mass?

88g of Sr reacts with _____g of Br₂ to produce 246g of SrBr₂

158 grams