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You found a container with a white substance labeled MCIO3 but you do not know which Group 1 metal M represents. You decide to use your chemistry wizardry to identify this mystery substance. You dissolve 5.00 g in enough water to produce 250. mL of the solution (Solution A). You decompose the chlorate according to the following reaction: 2MCIO3(aq) → 2MCI (aq) + 3 0₂ (g) AHxn=-140.2 kJ 1. You collect the O₂ produced and it has a volume of 1.53 L at a temperature of 25.0 °C and 0.980 atm. (a) How many moles of O₂ were produced? (b) How many moles of MCIO3 reacted? (c) What is the molar mass and the identity of the mystery substance?

You found a container with a white substance labeled MCIO3 but you do not know which Group 1 metal M represents. You decide to use your chemistry wizardry to identify this mystery substance. You dissolve 5.00 g in enough water to produce 250. mL of the solution (Solution A). You decompose the chlorate according to the following reaction: 2MCIO3(aq) → 2MCI (aq) + 3 0₂ (g) AHxn=-140.2 kJ 1. You collect the O₂ produced and it has a volume of 1.53 L at a temperature of 25.0 °C and 0.980 atm. (a) How many moles of O₂ were produced? (b) How many moles of MCIO3 reacted? (c) What is the molar mass and the identity of the mystery substance?

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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You found a container with a white substance labeled MCIO3 but you do not know which Group 1 metal M represents. You decide to use your chemistry wizardry to identify this mystery substance. You dissolve 5.00 g in enough water to produce 250. mL of the solution (Solution A). You decompose the chlorate according to the following reaction: 2MCIO3(aq) → 2MCI (aq) + 3 O₂ (g) AHrxn=-140.2 kJ 1. You collect the O₂ produced and it has a volume of 1.53 L at a temperature of 25.0 °C and 0.980 atm. (a) How many moles of O₂ were produced? (b) How many moles of MCIO3 reacted? (c) What is the molar mass and the identity of the mystery substance?
Transcribed Image Text:You found a container with a white substance labeled MCIO3 but you do not know which Group 1 metal M represents. You decide to use your chemistry wizardry to identify this mystery substance. You dissolve 5.00 g in enough water to produce 250. mL of the solution (Solution A). You decompose the chlorate according to the following reaction: 2MCIO3(aq) → 2MCI (aq) + 3 O₂ (g) AHrxn=-140.2 kJ 1. You collect the O₂ produced and it has a volume of 1.53 L at a temperature of 25.0 °C and 0.980 atm. (a) How many moles of O₂ were produced? (b) How many moles of MCIO3 reacted? (c) What is the molar mass and the identity of the mystery substance?
Expert Solution
Step 1

The balanced equation is

2 MClO3 (s) ↔ 2 MCl(s) + 3 O2 (g)

Given that

Temperature = 25 °C = 25 + 273.15 = 298.15 K

Pressure = 0.980 atm

Volume = 1.53 L

We know that

  PV = nRT

  n = PV/RT = (0.980 atm * 1.53 L)/ (0.0821 L.atm.mol-1.K-1 * 298.15 K)

  n = 0.061255 mol

Number of moles of O2 = 0.0613 mol

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