nitrogen and hydrogen combined in the ratio 14:3 by mass to form amonia molecule.find the formula of amonia molecule by calculating the molar mass (atomic mass of nitrogen = 144.4).

We know the mass of H is 1, so

N:H = 14:3

ammonia is HN3

To calculate the molar mass and determine the formula of an ammonia molecule (NH3) using the given information, we need to follow a step-by-step process:

Step 1: Determine the molar mass of nitrogen (N) and hydrogen (H):

The atomic mass of nitrogen is given as 144.4 grams/mol.
The atomic mass of hydrogen is approximately 1 gram/mol.

Step 2: Calculate the total combined mass of nitrogen and hydrogen in ammonia:

The ratio of nitrogen to hydrogen in ammonia is 14:3 by mass.
Let's assume that the mass of nitrogen in the ammonia molecule is 14x (since the ratio is 14:3, and x represents a constant).
Similarly, the mass of hydrogen in ammonia would be 3x.

Since the total mass of nitrogen and hydrogen in the ammonia molecule would equal the molar mass (which we need to determine), the equation becomes:
Mass of nitrogen (14x) + Mass of hydrogen (3x) = Molar mass

Step 3: Substitute the atomic masses and solve for x:

14x + 3x = Molar mass

Since the ratio of nitrogen to hydrogen is fixed, we can assume any value for x.
For simplicity, let's assume x = 1.

Substituting the values into the equation:

14(1) + 3(1) = Molar mass
14 + 3 = Molar mass
17 = Molar mass

Step 4: Determine the formula using the molar mass:

Knowing that the molar mass of an ammonia molecule is 17 grams/mol, we can deduce the formula from this information.

The formula of ammonia (NH3) indicates that one molecule contains one atom of nitrogen and three atoms of hydrogen.
Therefore, the formula of ammonia is NH3.

In conclusion, by calculating the molar mass of the combined nitrogen and hydrogen in the given ratio, we determined the formula of ammonia to be NH3.