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13 Dec 2019

1) can you determine the molecular formula if a substance from its percent composition.

2) given that zinc chloride has a formula weight of 136.28amu. what is its formula?

3) Can you determine the atomic weights of zinc or copper by the methods used in this experiment? if so how? what additional information is necessary to do this?

4) How many grams of zinc chloride could be formed from the reaction of 3.57g of zinc with excess HCI?

5) Aluminum sulfide reacts with water to form aluminum hydroxide and hydrogen sulfide. a) wrote a balance equation for this reaction. B) how many grams of aluminum hydroxide can be obtained from10.5g of aluminum sulfide.

6) when coppper(I) sulfide is partially roasted in air ( reaction with O2) sulfite is formed first. subssequently, upon heating , thr copper sulfite thermally decomposes to copper(I) oxide and sulfur dioxide. write balanced chemical equation for these two reactions.

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Reid Wolff
Reid WolffLv2
17 Dec 2019

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