Question

What is the molar mass of a phosphorus molecule ?

Answer 1

Hint: Mass is both a property of a physical body and a measure of its resistance to acceleration (rate of change of velocity with respect to time) when a net force is applied. An object's mass also determines the strength of its gravitational attraction to other bodies.Mass, in physics, is a quantitative measure of inertia, a fundamental property of all matter. It is, in effect, the resistance that a body of matter offers to a change in its speed or position upon the application of a force. The greater the mass of a body, the smaller the change produced by an applied force. This question gives knowledge about the molecular formula and weight of the chemical compounds. The molecular formula is the way of representing the chemical compounds. The molar mass is the sum of masses of the individual elements

Complete answer:
In chemistry, the molar mass of a chemical compound is defined as the mass of a sample of that compound divided by the amount of substance in that sample, measured in moles. It is the mass of 1 mole of the substance or $6.022\times {10}^{2}3$ particles, expressed in grams. The molar mass is a bulk, not molecular, property of a substance. The molar mass is an average of many instances of the compound, which often vary in mass due to the presence of isotopes. Most commonly, the molar mass is computed from the standard atomic weights and is thus a terrestrial average and a function of the relative abundance of the isotopes of the constituent atoms on Earth. The molar mass is appropriate for converting between the mass of a substance and the amount of a substance for bulk quantities. The molar mass is the sum of masses of the individual elements. The molar mass of phosphorus $P_4$ , is determined by summing up all the atoms of phosphorus present in this molecule. The molecular weight of one phosphorus is $31$ . So, the molecular weight of phosphorus molecules is $P_4$ is $124$ . Phosphorus, white, dry or under water or in solution appears as a soft waxy solid with a sharp pungent odor similar to garlic .White phosphorus is a colorless, white, or yellow waxy solid with a garlic-like. Phosphorus, white, molten appears as a white or yellow colored semi-liquid.

Note :
If you only wanted the molar mass of single atoms of phosphorus, then it is $31g/mol$ That is a mole of isolated phosphorus atoms would weigh $31$ grams. You should have complete knowledge about how the molecular formula is the way of representing the chemical compounds. It comprises the chemical symbols for the elements tailed by the numeric subscripts labelling the atoms of each element present in a molecule.