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- The simplest type of manipulation using molar mass as a conversion factor is a mole-mass conversion (or its reverse, a mass-mole conversion). In such a conversion, we use the molar mass of a substance as a conversion factor to convert mole units into mass units (or, conversely, mass units into mole units).
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Aug 10, 2022 · In such a conversion, we use the molar mass of a substance as a conversion factor to convert mole units into mass units (or, conversely, mass units into mole units). We also established that 1 mol of Al has a mass of 26.98 g (Example). Stated mathematically, 1 mol Al = 26.98 g Al.
- Solutions
Molar mass can then be used as a conversion factor to...
- 6.3: Mole-Mass Conversions
In such a conversion, we use the molar mass of a substance...
- Conversions Between Moles and Mass
The molar mass of \(\ce{CaCl_2}\) is \(110.98 \:...
- Solutions
Sep 15, 2022 · In such a conversion, we use the molar mass of a substance as a conversion factor to convert mole units into mass units (or, conversely, mass units into mole units). We also established that 1 mol of Al has a mass of 26.98 g (Example \(\PageIndex{1}\)).
The molar mass of \(\ce{CaCl_2}\) is \(110.98 \: \text{g/mol}\). The conversion factor that can be used is then based on the equality that \(1 \: \text{mol} = 110.98 \: \text{g} \: \ce{CaCl_2}\). Dimensional analysis will allow you to calculate the mass of \(\ce{CaCl_2}\) that you should measure.
In such a conversion, we use the molar mass of a substance as a conversion factor to convert mole units into mass units (or, conversely, mass units into mole units). We established that 1 mol of Al has a mass of 26.98 g (Example 3 in Section 6.2 “Atomic and Molar Masses”).
We know how to do this by simply using the molar mass of Cl 2 as a conversion factor. The molar mass of Cl 2 (which we get from the atomic mass of Cl from the periodic table) is 70.90 g/mol. We must invert this fraction so that the units cancel properly:
We will do this in two steps: convert the mass of AlCl 3 to moles and then use the balanced chemical equation to find the number of moles of HCl formed. The molar mass of AlCl 3 is 133.33 g/mol, which we have to invert to get the appropriate conversion factor:
We will do this in two steps: convert the mass of AlCl 3 to moles and then use the balanced chemical equation to find the number of moles of HCl formed. The molar mass of AlCl 3 is 133.33 g/mol, which we have to invert to get the appropriate conversion factor: