One substance breaks down into two or more substances.
So, the molecular weight for ethane, C2H6, would be: (3 answers)
C: 2(12.0 amu)
+ H: 6(1.0 amu)
= 30.0 amu
Percent Composition: So the percentage of carbon ethane is: %C = (2)(12.0 amu)/(30.0 amu) = 24.0 amu/20.0 amu x 100 = 80% (1 answer)
So, the formula weight of calcium chloride, CaCl2, would be: (3 answers)
Ca: 1(40.1 amu)
+ Cl: 2(35.5 amu)
= 111,1 amu
How to balance combustion: (1 answer)
do the C first, H second & O last.
Subscripts and Coefficients: Subscripts tell the number of atoms of each element in a molecule.Coefficients are inserted to balance the equation.Coefficients tell the number of molecules.Combination Reactions: Two or more substances react to form one product.Equations must always be balanced.Decompositions Reactions:One substance breaks down into two or more substances.Combustion Reactions: Rapid reactions that produce a flame.Most often involve hydrocarbons reacting with oxygen in the air.How to balance combustion: do the C first, H second & O last. (1 answer)
: (1 answer)
So the percentage of carbon ethane is:
: (MW) (2 answers)
Sum of the atomic weights of the atoms in a molecule.
So, the molecular weight for ethane, C2H6, would be:
: (3 answers)
Rapid reactions that produce a flame.
Most often involve
How to balance combustion:
: (8 answers)
Avogadro's Number (1776-1856), Italian
6.02 E23 (no unit)
18.0 amu of water = 1 mol H20
Example = Aspirin = 180.2 g/mol
One mole of atoms, ions, or molecules contains Avagadro's number of those particles.
One mole of molecules or formula units contains Avagadro's number times the number of atoms or ions of each element in the compound.
No unit, just a number.
Comes from Carbon, the 12th Carbon.
Molecular Weight: (MW) Sum of the atomic weights of the atoms in a molecule.So, the molecular weight for ethane, C2H6, would be: C: 2(12.0 amu)+ H: 6(1.0 amu)= 30.0 amu (1 answer)
Law of Conservation of Matter:Lavoisier (1743-1794)Because the same atoms are present in a reaction at the beginning and at the end, the amount of matter in a system does not change.Matter can neither be created nor destroyed.Because of the principle of conservation of matter, all equations must be balanced.Reactants appear on the left side of the equation.Products appear on the right side of the equation.The states of the reactants and products are written in parentheses to the right of each compound. (4 answers)
Subscripts and Coefficients
Ions: Cation: charge = group numberAnion: charge = 8 - group number (1 answer)
Law of Conservation of Matter:
Stoichiometry: Calculations with Chemical Formulas and Equations (2 answers)
According to Coulomb's law, as the distance between ions decreases, the attractive forces