Question

Calculate the number of moles of oxygen molecules in $320g$ of oxygen gas.

Answer 1

Hint : To calculate the number of moles of the oxygen molecule. We must know the formula that is being used. So, the formula to calculate number of moles is $\dfrac{{mass\;of\;the\;given\;substance}}{{molar\;mass}}$

Complete Step By Step Answer:
A mole is characterized as the mass of the substance which comprises the equivalent amount of essential units. Model molecules in $12$ grams are equivalent to $12c$ . The fundamental units can be particles, ions or equation units dependent on the substance.
A mole portion shows the quantity of substance components. One mole of any substance is equivalent to the estimation of $6.023 \times {10^{23}}$ (Avagadro number). It tends to be utilized to quantify the items obtained from the synthetic response. The unit is indicated by mol.
Avogadro's number is a very important relationship to remember: $1mole = 6.022 \times {10^{23}}$ atoms, molecules, protons, etc. To convert from moles to atoms, multiply the molar amount by Avogadro's number.
We know the formula of the number of moles.
$=$ $\dfrac{{given\;mass}}{{molar\;mass}}$ .
We have given mass that is $320g$ , and we know the molar mass of the oxygen is $32g$ .
Now, let’s put the values in the formula
$= \dfrac{{given\;mass}}{{molar\;mass}} = \dfrac{{320g}}{{32g}}$ .
So, the number of moles of oxygen molecules in $320g$ of oxygen gas is $10g$ .

Note :
The mole is an action or the base unit for the measure of substance present in the given example. $1$ mole is a number which is equivalent to $6.022 \times {10^{23}}$ particles, otherwise called the Avogadro's consistency. These particles can be any sort of species, example ions, atoms, electrons, protons, neutrons and so forth.