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1. Can you determine the molecular formula of a substance from its percent composition? 2. Given that zinc chloride has
Posted: Wed May 18, 2022 9:32 am
by answerhappygod
- 1 Can You Determine The Molecular Formula Of A Substance From Its Percent Composition 2 Given That Zinc Chloride Has 1 (436.81 KiB) Viewed 96 times
1. Can you determine the molecular formula of a substance from its percent composition? 2. Given that zinc chloride has a formula weight of 136.28u, what is its formula? 3. Can you determine the atomic weights of zinc or copper by the methods used in this experiments? 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 3.57 g of zinc with excess HCI? 5. Magnesium reacts directly with nitrogen gas to form magnesium nitride. In an experiment conducted, it was found that 0.36 g of magnesium produced 0.50 g of magnesium nitride. (a) How many moles of nitrogen combined with 0.36 g of magnesium? (b) What is the ratio of nitrogen atoms to magnesium atoms in magnesium nitride? (c) What is the empirical formula of magnesium nitride? 6. When copper(l) sulfide is partially roasted in air (reaction with O2), copper(l) sulfite is formed first. Subsequently, upon heating, the copper sulfite thermally decomposes to copper(1) oxide and sulfur dioxide. Write balanced chemical equations for these two reactions.