Question

Write a sentence that describes how to determine the number of moles of a compound in a known mass of the compound using its molecular formula.

a) Divide the mass by the molecular weight.
b) Multiply the mass by Avogadro's number.
c) Subtract the mass from the molecular weight.
d) Take the square root of the mass.

Answer 1

To determine the number of moles of a compound, divide its mass by the molar mass, which is the sum of atomic masses of its constituent elements.

Step-by-step explanation:

• To determine the number of moles of a compound, divide its mass by the molar mass.
• The molar mass is the sum of atomic masses of its constituent elements, which can be found on the periodic table.
• This process is represented by the equation:
  `\( n = (m)/(M) \)`, where n is the number of moles, m is the mass in grams, and M is the molar mass of the compound in grams per mole.
• This calculation allows for converting the given mass of a compound into its corresponding quantity in moles.