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Calculate The Molar Mass of The Following Substances Nh42cr2o7

Reviewed by Calculator Editorial Team

Calculating the molar mass of NH42Cr2O7 is essential for chemistry students and professionals working with ammonium dichromate. This guide explains the step-by-step process, provides a calculator, and includes a worked example to help you understand the calculation.

How to Calculate Molar Mass

The molar mass of a compound is the sum of the atomic masses of all the atoms in its chemical formula. To calculate the molar mass of NH42Cr2O7:

  1. Identify the number of each type of atom in the formula.
  2. Find the atomic mass of each element from the periodic table.
  3. Multiply each atomic mass by the number of atoms of that element in the compound.
  4. Add all the values together to get the molar mass.

For NH42Cr2O7, the formula contains:

  • 2 Nitrogen (N) atoms
  • 8 Hydrogen (H) atoms
  • 2 Chromium (Cr) atoms
  • 7 Oxygen (O) atoms

Molar Mass Formula

The molar mass (M) of a compound can be calculated using the following formula:

M = Σ (number of atoms of each element × atomic mass of each element)

For NH42Cr2O7:

M = (2 × atomic mass of N) + (8 × atomic mass of H) + (2 × atomic mass of Cr) + (7 × atomic mass of O)

Using the atomic masses from the periodic table:

  • Nitrogen (N): 14.01 g/mol
  • Hydrogen (H): 1.01 g/mol
  • Chromium (Cr): 51.996 g/mol
  • Oxygen (O): 16.00 g/mol

Worked Example

Let's calculate the molar mass of NH42Cr2O7 step-by-step:

  1. Calculate the mass contribution from Nitrogen (N):
    2 × 14.01 g/mol = 28.02 g/mol
  2. Calculate the mass contribution from Hydrogen (H):
    8 × 1.01 g/mol = 8.08 g/mol
  3. Calculate the mass contribution from Chromium (Cr):
    2 × 51.996 g/mol = 103.992 g/mol
  4. Calculate the mass contribution from Oxygen (O):
    7 × 16.00 g/mol = 112.00 g/mol
  5. Add all contributions to get the total molar mass:
    28.02 + 8.08 + 103.992 + 112.00 = 252.092 g/mol

The molar mass of NH42Cr2O7 is approximately 252.09 g/mol.

Frequently Asked Questions

What is the molar mass of NH42Cr2O7?

The molar mass of NH42Cr2O7 is approximately 252.09 g/mol. This is calculated by summing the atomic masses of all atoms in the compound.

How do I calculate the molar mass of a compound?

To calculate the molar mass, multiply the atomic mass of each element by the number of atoms of that element in the compound, then sum all these values.

Where can I find atomic masses for elements?

Atomic masses can be found in the periodic table, typically available in chemistry textbooks or online resources like the Periodic Table of Elements.