Acompound is decomposed by an electric current giving 19.98 % g o and 2.52 g h what is the % composition of this compound. (find the % by mass of each element)

We have to calculate the percentage composition of the compound.

The answer is: amount (in mass percentage) of oxygen is 88.8 % and amount (in mass percentage) of hydrogen is 11.2 %.

We know atomic mass of oxygen is 16 and atomic mass of hydrogen is 1.

The amount of Oxygen produced= 19.98 g and amount of Hydrogen produced= 2.52 g. So, total amount of the compound is: (19.98  + 2.52) g= 22.50 g.

So, mass percentage of oxygen is (Mass of oxygen produced/ total mass of compound) X 100 = = 88.8 %

Masspercentage of hydrogen is:  (Mass of hydrogen produced/ total mass of compound) X 100 = =  11.2 %.

answers: to make sure that all of the broken pieces of tablet were added to the water, to allow for fair comparison of all three trials, with different particle sizes to avoid experimental error

every chemical equation adheres to the law of conservation of mass, which states that matter cannot be created or destroyed. therefore, there must be the same number of atoms of each element on each side of a chemical equation.