Question

Как найти молекулярную массу вещества

Answer 1

Чтобы найти молекулярную массу вещества, надо массу этого вещества поделить на количество вещества.

Answer 2

How to Find the Molecular Mass of a Substance

To find the molecular mass of a substance, you can follow these steps:

1. Determine the chemical formula of the substance. 2. Identify the atomic masses of each element in the formula. 3. Multiply the atomic mass of each element by the number of atoms of that element in the formula. 4. Sum up the results from step 3 to calculate the molecular mass of the substance.

Let's illustrate this process with an example.

Example: Finding the Molecular Mass of Water (H2O)

1. The chemical formula of water is H2O. 2. The atomic mass of hydrogen (H) is approximately 1.008 atomic mass units (amu). The atomic mass of oxygen (O) is approximately 15.999 amu. 3. Multiply the atomic mass of hydrogen by the number of hydrogen atoms (2) in the formula: 1.008 amu * 2 = 2.016 amu. Multiply the atomic mass of oxygen by the number of oxygen atoms (1) in the formula: 15.999 amu * 1 = 15.999 amu. 4. Sum up the results: 2.016 amu + 15.999 amu = 18.015 amu.

Therefore, the molecular mass of water (H2O) is approximately 18.015 amu.

You can apply this process to any chemical formula to find the molecular mass of a substance.

I hope this explanation helps! Let me know if you have any further questions.