Answer:
0.107 mol moles of NaCl were present.
Step-by-step explanation:
To convert this mass into grams you need to use the formula:
moles= mass/molar mass
We have the mass but we do not have the molecular mass. To find the molar mass we should use the periodic table. In the periodic table, the atomic mass of Na is 23 and Cl is 35.5. To find the molar mass we have to multiply the moles by the atomic mass of all elements present and add it to the number of molecules.
1×( 23+35.5) (there is only one mole of the substance)
Molecular mass= 58.5 g/mol
Now going back to the original equation:
moles= 6.25 g/ 58.5 g/mol
moles= 0.106837606= 0.107 mol