Balancing, naming, writing equations

• Combination

• Decomposition

• Single Replacement

• Double Replacement

• Combustion

• Combination

• Decomposition

• Single Replacement

• Double Replacement

• Combustion

Why must chemical equations be balanced?

• So that the equation doesn't explode

• The reaction won't happen until it is balanced

• Based on the Law of Conservation of Matter, matter cannot be created or destroyed.

• Based on the Law of Conservation of Energy, energy cannot be created or destroyed.e

What are the 7 elements are always found as diatomics (two bonded together, like X₂) when they are in their pure form (not part of a compound)?

• Br, I, N, Cl, H, O, F

• B, I, N, C, H, O, F

• B, R, O, F, In, C, H

• Br, I, Ni, C, Ho, F

In this synthesis reaction, Hydrogen gas and chlorine gas produce ________?

• Hydrogen Bromide

• Water (H₂0)

• hydrogen chloride

• Hydrogen Sulfide

In this synthesis reaction Aluminum and ________ produces aluminum oxide

• oxygen

• Sulfur

• Iodine

• Chlorine

LiBr is called

Hint: It is an ionic compound (metal and nonmetal). Positive and negative charges must balance. You only need a roman numeral if Li has more then one option for an ion.

• lithium bromine

• lithium (I) bromine

• lithium bromide

• lithuim (I) bromide

Name the ionic compound SnSe₂

Hint: It is an ionic compound (metal and nonmetal). Positive and negative charges must balance. You only need a roman numeral if Sn has more then one option for an ion. Also, there are 2 Se and each have a charge of -2

• Tin diselenide

• Tin (IV) Selenide

• Tin selenide

• Tin (II) triselenide

How do the following two elements bond together?
K¹⁺  S^2- 

Remember, the charges must balance.

• KS
• K₈S
• K₆S₃
• K₂S

The chemical formula of iron (III)bromide is Hint: The roman number III tells you that the Fe is 3+. Br is -1. So, you will need more Br to balance the charges.

• FeBr
• Fe(III)Br
• FeBr₃
• Fe₂Br₃