How to calculate molecular weight?
add up the individual atomic weights of each element. Don't forget to multiply an element's atomic weight by
atoms of that element there are.
What is a Mole and how to you solve for it?
The amount of chemical reaction of a compound. Moles= gram/ molecular weight
Percent of an element
= (weight of an individual element/ MW of the whole compound) x 100
How to solve for Empirical Formula
1. Divide each each % of an element (this is provided) by it's atomic weight
2. Using the results from step 1, divide each of those results by the smallest number given from that set (roun
to nearest whole number) ( if one of the answers ends in .25- 1/4, .333- 1/3, .5- 1/2, .666- 2/3, .75- 3/4 multip
answers by the denominator)
3. The whole numbers become the subscripts. aka the number of atoms in the element
, Combination reaction (synthesis)
a chemical change in which 2 or more substances react to form a single new substance
Decomposition reaction
a chemical change in which a single compound is broken down into two or more products
Combustion reaction
A reaction in which a hydrocarbon combines with oxygen to produce carbon dioxide and water
What is a double replacement reaction
A reaction in which 2 ionic compounds exchange their ions to form a non-ionic compound product either as a
insoluble precipitate, gas, or molecular compound
What is a single replacement reaction
A reaction in which a metallic element reacts with a metallic ionic compound to replace the metal ion from the
compound as a metal element.
Same goes for nonmetal elements and nonmetal ionic compounds
add up the individual atomic weights of each element. Don't forget to multiply an element's atomic weight by
atoms of that element there are.
What is a Mole and how to you solve for it?
The amount of chemical reaction of a compound. Moles= gram/ molecular weight
Percent of an element
= (weight of an individual element/ MW of the whole compound) x 100
How to solve for Empirical Formula
1. Divide each each % of an element (this is provided) by it's atomic weight
2. Using the results from step 1, divide each of those results by the smallest number given from that set (roun
to nearest whole number) ( if one of the answers ends in .25- 1/4, .333- 1/3, .5- 1/2, .666- 2/3, .75- 3/4 multip
answers by the denominator)
3. The whole numbers become the subscripts. aka the number of atoms in the element
, Combination reaction (synthesis)
a chemical change in which 2 or more substances react to form a single new substance
Decomposition reaction
a chemical change in which a single compound is broken down into two or more products
Combustion reaction
A reaction in which a hydrocarbon combines with oxygen to produce carbon dioxide and water
What is a double replacement reaction
A reaction in which 2 ionic compounds exchange their ions to form a non-ionic compound product either as a
insoluble precipitate, gas, or molecular compound
What is a single replacement reaction
A reaction in which a metallic element reacts with a metallic ionic compound to replace the metal ion from the
compound as a metal element.
Same goes for nonmetal elements and nonmetal ionic compounds
