What is the relative molecular mass (Mr) of nitroglycerin?

To calculate the relative molecular mass (Mr) of nitroglycerin (C3H5N3O9), you need to add up the relative atomic masses of all the atoms in the molecule.

1. First, find the relative atomic masses of the elements in nitroglycerin. You can find these values on the periodic table. The relative atomic masses are approximately: Carbon (C) = 12.01, Hydrogen (H) = 1.01, Nitrogen (N) = 14.01, and Oxygen (O) = 16.00.

2. Next, multiply the relative atomic mass of each element by the number of atoms of that element in the molecule. For nitroglycerin, this would be:

   • Carbon (C): 12.01 * 3 = 36.03
   • Hydrogen (H): 1.01 * 5 = 5.05
   • Nitrogen (N): 14.01 * 3 = 42.03
   • Oxygen (O): 16.00 * 9 = 144.00

3. Finally, add up these values to find the relative molecular mass of nitroglycerin:

   • 36.03 (C) + 5.05 (H) + 42.03 (N) + 144.00 (O) = 227.11

So, the relative molecular mass of nitroglycerin is approximately 227.11.