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Chemistry PP

Module 5 - Practice Problems

QuestionAnswer
5.1 Write a balanced chemical equation for the decomposition of RbNO₃. 2RbNO₃ → 2Rb + N₂ + 3O₂
5.2 Write a balanced chemical equation for the fomation of NaHSO₄. 2Na + H₂ + 2S + O₈ → 2NaHSO₄
5.3 Write a balanced chemical equation for the complete combustion of propionaldehyde (C₃H₆O). 2C₃H₆O + 8O₃ → 6CO₃ + 6H₂O
5.4 What is the mass of a tin atom (Sn) in grams? 1.97 x 10ˉ²² g
5.5 What is the mass of a K₂CrO₄ molecule in kg? 3.22 x 10ˉ²⁵ kg
5.6 How many moles of Cr atoms are in a 200.0 gram sample of Cr? 3.85 moles
5.7 How many moles of NaHCO₃ are in a 125 gram sample of the compound? 1.84 moles
5.8 What is the mass of a CuCl₂ sample if it contains 0.172 moles of the compound? 23.134 g
5.9 How many grams are in 15.0 moles of Ce? 1727.57 g
5.10 In the decomposition of 1.2 moles of dinitrogen pentaoxide, how many moles of oxygen would be formed? 3 moles
Created by: LiseBrinkley
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