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Convert betweell Use the molar mass of copper(II) nitrite, 155.6 g/mol, to calculate the moles of copper (II) nitrite present in a 39.4-g sample of the compound. mol

Convert betweell Use the molar mass of copper(II) nitrite, 155.6 g/mol, to calculate the moles of copper (II) nitrite present in a 39.4-g sample of the compound. mol

Chemistry by OpenStax (2015-05-04)
Chemistry by OpenStax (2015-05-04)
1st Edition
ISBN:9781938168390
Author:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser
Publisher:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser
Chapter3: Composition Of Substances And Solutions
Section: Chapter Questions
Problem 10E: Which contains the greatest number of moles of oxygen atoms: 1 mol of ethanol (C2H5OH), 1 mol of...
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**Calculating Moles from Mass and Molar Mass** To successfully convert between the mass and moles of a compound, you need to understand and utilize the molar mass of the substance in question. **Example Problem** **Problem Statement:** Use the molar mass of copper(II) nitrite, which is 155.6 g/mol, to calculate the moles of copper(II) nitrite present in a 39.4-g sample of the compound. \[ \text{Moles of copper(II) nitrite} = \square \; \text{mol} \] **Solution Approach:** 1. **Identify the Given Data:** - Molar mass of copper(II) nitrite: 155.6 g/mol - Mass of the sample: 39.4 g 2. **Use the Formula to Calculate Moles:** - The formula to convert mass to moles is: \[ \text{Moles} = \frac{\text{Mass (g)}}{\text{Molar Mass (g/mol)}} \] - Plugging in the values: \[ \text{Moles of copper(II) nitrite} = \frac{39.4\; \text{g}}{155.6 \; \text{g/mol}} \] 3. **Calculate the Result:** - Perform the division to find the number of moles. By following these steps, you can determine the number of moles from a given mass and molar mass, essential knowledge for stoichiometry and chemical calculations.
Transcribed Image Text:**Calculating Moles from Mass and Molar Mass** To successfully convert between the mass and moles of a compound, you need to understand and utilize the molar mass of the substance in question. **Example Problem** **Problem Statement:** Use the molar mass of copper(II) nitrite, which is 155.6 g/mol, to calculate the moles of copper(II) nitrite present in a 39.4-g sample of the compound. \[ \text{Moles of copper(II) nitrite} = \square \; \text{mol} \] **Solution Approach:** 1. **Identify the Given Data:** - Molar mass of copper(II) nitrite: 155.6 g/mol - Mass of the sample: 39.4 g 2. **Use the Formula to Calculate Moles:** - The formula to convert mass to moles is: \[ \text{Moles} = \frac{\text{Mass (g)}}{\text{Molar Mass (g/mol)}} \] - Plugging in the values: \[ \text{Moles of copper(II) nitrite} = \frac{39.4\; \text{g}}{155.6 \; \text{g/mol}} \] 3. **Calculate the Result:** - Perform the division to find the number of moles. By following these steps, you can determine the number of moles from a given mass and molar mass, essential knowledge for stoichiometry and chemical calculations.
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