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☆☆☆☆☆The molecular formula specifies the actual number of atoms of each element in a molecule.
16.0 lbs = 7,257 g of O2
Oxygen exists in the gas form as 02
7,257g O2 * 1 mol O2/ 32 g * 2 mol O / 1 mol O2 * 6.022x10^23 atoms/mol
= 2.73E26 atoms of O
A+B ➝AB
it tells which compounds will dissolve in water
Percentage composition= (mass of the element/mass of the molecule)*100
The fraction of the molecule's mass that comes from the element's mass
the reactants are compounds that react to form new compounds , the products
It compares how reactive the metals are
It predicts if one metal will replace another metal in a compound
they express the numbers using scientific notation
62
A product of a chemical reaction is the substance that is formed.
heat
C3H8 + 5O2 = 3CO2 + 4H2O, so the coefficient for O2 is 5
The reactants will have one Na, one Cl, one O, and two H atoms
H2
It is the same as the element’s atomic mass, but in grams.
The product will contain only Zn, H, and CI. -Apex
