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Chemistry Quiz III: Reactions, Formulas, and Masses, Quizzes of Chemistry

Lansing Community College Chemistry

A 15-question multiple-choice quiz focusing on various topics in chemistry, including balanced chemical equations, empirical and molecular formulas, limiting reagents, and percent composition. Students are expected to apply their knowledge of chemical reactions and calculations to determine the correct answers.

Typology: Quizzes

2011/2012

Uploaded on 01/15/2012

angelo-de-la-casa 🇺🇸

4.4

(34)

536 documents

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Download Chemistry Quiz III: Reactions, Formulas, and Masses and more Quizzes Chemistry in PDF only on Docsity! Chapter 3 Quiz C Name ________________________ 2pts 1. Write a balanced chemical equation for the following reactions: a) The decomposition of solid potassium chlorate to yield solid potassium chloride and oxygen gas. b) NO2 + H2O ® HNO3 + NO 2pts 2. Glyceraldehye has an empirical formula of CH2O. If its molar mass is 90.1 g/mol, what is its molecular formula? 2pts 3. How many grams of urea can be produced from 10.0g of NH3 and 10.0g of CO2? (Be sure to identify the limiting reagent.) 2NH3 + CO2 ® CH4N2O + H20 (urea) 2pts 4. Calculate the percent by mass hydrogen in ammonium acetate, NH4C2H3O2. 2pts 5. A flask contains 1.69 x 1018 water molecules. How many grams of water are in the flask?

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