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☆☆☆☆☆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
58 is another way of writing it. Unless 10-2 is in parentheses, you do the multiplication first. 6(10-2) = 48.
it tells which compounds will dissolve in water
Na2SO4 + BaCl2 ---> 2NaCl + BaSO4 :)
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
2 m
It can shorten the expression into a number that can more easily be understood by giving an order of magnitude to the number. For example, would you write 0.00000000000000000045 or would you write 4.5 X10-19.
OH- 2H+ -> 2H2O(I)
ywwww
:)
H2
