Taking into account the definition of molar mass, the mass of 0.433 moles of calcium nitrate is 71.012 grams.
Molar mass is the amount of mass that a mole of a substance contains, which can be an element or a compound.
Calcium nitrate is an inorganic compound with the formula Ca(NO₃)₂. The molar mass of a compound is the sum of the molar mass of the elements that make it up multiplied by the times they appear in the compound.
In this case, the molar mass of the elements is:
- Ca: 40 g/mole
- N: 14 g/mole
- O: 16 g/mole
So, the molar mass of calcium nitrate is:
Ca(NO₃)₂= 40 g/mole + 2×(14 g/mole + 3×16 g/mole)
Ca(NO₃)₂= 164 g/mole
Then it is possible to apply the following rule of three: if by definition of molar mass 1 mole of calcium nitrate contains 164 g, 0.433 moles of the compound contains how much mass?
[tex]mass of calcium nitrate=\frac{0.433 molesx164 grams}{1 mole}[/tex]
mass of calcium nitrate= 71.012 grams
Finally, the mass of 0.433 moles of calcium nitrate is 71.012 grams.
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