HW-Dalton's atomic theory and chemical laws?

Question

How does Dalton's atomic theory account for each of the following?

a. the law of conservation of mass

b. the law of definite proportion

c. the law of multiple proportions

Answer 1

a. dalton's theory states that atoms are neither created nor destroyed so mass must be conserved

b. in a given compound the relative numbers and kinds of atoms are constant

c. if two elements A and B combine to form more than one compound, the masses of B that can combine with given mass of A are in the ratio of small whole numbers (H2O, 2 units of hydrogen for every 1 unit of oxygen)

hope this helps

Answer 2

a) Atoms are neither created nor destroyed, just reshuffled in a chemical reaction.

b) If compounds have definite formulas, and atoms have definite relative masses ...

c) Take an example.  Using modern knowledge, H2O is roughly 8 parts O to 1 part H by mass. H2O2 is roughly 16 to 1. Think about how this ties in with the fact that each O atom weighs about 16 times as much as an H atom.

The point is that 8:1 is simply related to 16:1, and counting atoms explains this.

Now work this out in your own words. Good luck.