Considering the definition of formula mass, the formula mass of Na₄C₄H₅O₃ is 193 g/mole.
Definition of formula mass
The molar mass of substance is a property defined as its mass per unit quantity of substance, in other words, molar mass is the amount of mass that a substance contains in one mole.
The molar mass or formula mass of a compound (also called Mass or Molecular Weight) is the sum of the molar mass of the elements that form it (whose value is found in the periodic table) multiplied by the number of times they appear in the compound.
Formula mass of Na₄C₄H₅O₃
In this case, you know the molar mass of the elements is:
- Na= 23 g/mole
- C= 12 g/mole
- H= 1 g/mole
- O= 16 g/mol
So, the formula mass of the compound Na₄C₄H₅O₃ is calculated as:
Na₄C₄H₅O₃= 4× 23 g/mole + 4× 12 g/mole + 5× 1 g/mole + 3× 16 g/mole
Solving:
Na₄C₄H₅O₃= 193 g/mole
Finally, the formula mass of Na₄C₄H₅O₃ is 193 g/mole.
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