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What is the molar mass of Co(NO3)2 6H2O? Show your calculations.

What is the molar mass of Co(NO3)2 6H2O? Show your calculations.

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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### Question: What is the molar mass of Co(NO3)2·6H2O? Show your calculations. ### Explanation: To find the molar mass of the compound Co(NO3)2·6H2O, we need to calculate the molar mass of each component and sum them up. Here's how you can break it down: 1. **Cobalt (Co):** - Atomic mass: 58.93 g/mol - Quantity: 1 atom - Total = 58.93 g/mol 2. **Nitrate (NO3):** - Atomic mass of Nitrogen (N): 14.01 g/mol - Atomic mass of Oxygen (O): 16.00 g/mol - Total mass of NO3 = 14.01 + (3 × 16.00) = 62.01 g/mol - Quantity: 2 groups of NO3 - Total = 2 × 62.01 g/mol = 124.02 g/mol 3. **Water of crystallization (6H2O):** - Atomic mass of Hydrogen (H): 1.01 g/mol - Atomic mass of Oxygen (O): 16.00 g/mol - Total mass of H2O = (2 × 1.01) + 16.00 = 18.02 g/mol - Quantity: 6 molecules of H2O - Total = 6 × 18.02 g/mol = 108.12 g/mol ### Final Calculation: - Total molar mass = Molar mass of Co + Molar mass of 2(NO3) + Molar mass of 6H2O - Total = 58.93 + 124.02 + 108.12 = 291.07 g/mol Therefore, the molar mass of Co(NO3)2·6H2O is **291.07 g/mol**.
Transcribed Image Text:### Question: What is the molar mass of Co(NO3)2·6H2O? Show your calculations. ### Explanation: To find the molar mass of the compound Co(NO3)2·6H2O, we need to calculate the molar mass of each component and sum them up. Here's how you can break it down: 1. **Cobalt (Co):** - Atomic mass: 58.93 g/mol - Quantity: 1 atom - Total = 58.93 g/mol 2. **Nitrate (NO3):** - Atomic mass of Nitrogen (N): 14.01 g/mol - Atomic mass of Oxygen (O): 16.00 g/mol - Total mass of NO3 = 14.01 + (3 × 16.00) = 62.01 g/mol - Quantity: 2 groups of NO3 - Total = 2 × 62.01 g/mol = 124.02 g/mol 3. **Water of crystallization (6H2O):** - Atomic mass of Hydrogen (H): 1.01 g/mol - Atomic mass of Oxygen (O): 16.00 g/mol - Total mass of H2O = (2 × 1.01) + 16.00 = 18.02 g/mol - Quantity: 6 molecules of H2O - Total = 6 × 18.02 g/mol = 108.12 g/mol ### Final Calculation: - Total molar mass = Molar mass of Co + Molar mass of 2(NO3) + Molar mass of 6H2O - Total = 58.93 + 124.02 + 108.12 = 291.07 g/mol Therefore, the molar mass of Co(NO3)2·6H2O is **291.07 g/mol**.
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