Taking into account the definition of molar mass, 12.61 moles are in 737 grams of NaCl.
But first, the molar mass of a given substance is a physical property defined as the mass of one mole of a substance, which can be an element or a compound.
In a compound the molar mass is equal to the sum of the weight or atomic mass of its atoms multiplied by its quantity; that is, the molar mass of the elements of the compound must be added multiplied by the times they appear.
In this case, the atomic mass of the elements of the compound are:
- Na: 23 g/mole
- Cl: 35.45 g/mole
Then the atomic mass of the compound NaCl is:
NaCl= 23 g/mole + 35.45 g/mole
NaCl= 58.45 g/mole
Then you can apply the following rule of three: if by definition of molar mass 58.45 grams of the compound are contained in 1 mole, 737 grams are contained in how many moles?
[tex]amount of moles=\frac{737 gramsx1 mole}{58.45 grams}[/tex]
amount of moles= 12.61 moles
In summary, 12.61 moles are in 737 grams of NaCl.
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