Vocabulary 1
What are products?
The new substances produced
What is a mole?
The amount of substance that contains 6.02x 1023 particles of that substance
(s)
Solid
(+)
Plus
N2 + H2 -> NH3
1N2 + 3H2 -> 2NH3
P + O2 -> P2O5
4P + 5O2 -> 2P2O5
What are reactants?
The starting substances that react
The mass in grams of one mole of a substance
(l)
Liquid
Heat-->
The reactants are heated
KClO3 -> KCl + O2
2KClO3 -> 2KCl + 3O2
S8 + O2 -> SO2
S8 + 8 O2 -> 8SO2
What are coefficients?
The number that appears before a substance that represent the number of units of each substance in the reaction
What are subscripts?
The small number that goes behind a substance in an equation
(g)
Gas
Light-->
The reactants are exposed to light
NaCl + F2 -> NaF + Cl2
2NaCl + 1F2 -> 2NaF + 1Cl2
V2O5 + CaS -> CaO + V2S5
V2O5 + 5 CaS -> 5CaO + V2S5
What is a chemical equation?
A way to describe a chemical reaction using chemical formulas and other symbols
2Mg(s) + O2(g) -> 2MgO(s)
A balanced chemical equation
(aq)
aqueous
Elec -->
An electric current is applied to the reactants
H2 + O2 -> H2O
2H2 + 1 O2 -> 2H2O
How many moles are in 50.00g go NO2?
50.00g NO2 x 1 mol NO2 / 46.01 g NO2 = 1.087 mol NO2
What is a chemical reaction?
A change in which one or more substances are converted into new substances
What is a balanced chemical equation?
a chemical equation with the same number of atoms of each element on both sides of the arrow
(-->)
produces or yields
mol
6.02x10^23
Pb(OH)2 + HCl -> H2O + PbCl2
1Pb(OH)2 + 2HCl -> 2H2O + 1PbCl2
0.2020 mol NO2 x 46.01g NO2 / 1 mol NO2 = 9.294g NO2