Respuesta :

aryan0091838

Answer:

212.996 or 213 approx.

hope it helps.

Molar mass of Al - 27

Molar mass of N - 14

Molar mass of O - 16

so, the molar mass of (No3)3 will be (14+16×3)3 which is equals to 186.

so, Molar mass of Al(No3)3 will be 186+27 = 213.

Sarah06109

Answer:

[tex]\boxed {\boxed {\sf 212.99 \ g/mol}}[/tex]

Explanation:

The molar mass is the mass of 1 mole of a substance. These values are found on the Periodic Table because they are equal to the atomic masses, but the units are grams per mole instead of atomic mass units.

Aluminum nitrate is made up of 3 elements: aluminum, nitrogen, and oxygen. Look up the molar masses of the individual elements.

  • Al: 26.981538 g/mol
  • N: 14.007 g/mol
  • O: 15.999 g/mol

Let's analyze the chemical formula: Al (NO₃)₃

NO₃ is in parentheses with a subscript of 3 after. This means there are 3 nitrate ions in 1 mole of aluminum nitrate. Find the molar mass of a nitrate ion, multiply by 3, then add aluminum's molar mass.

  • NO₃ = 14.007 + 3(15.999) = 14.007+47.997 =62.004 g/mol
  • (NO₃)₃ = 3(62.004) =186.012 g/mol
  • Al (NO₃)₃ = 26.981538 + 186.012 = 212.993538 g/mol

We can round to the nearest hundredth. The 3 in the thousandth place tells us to leave the 9 in the hundredth place.

  • Al(NO₃)₃ ≈ 212.99 g/mol

The molar mass of aluminum nitrate is approximately 212.99 grams per mole.

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