It is important to conserve non renewable sources of energy such as coal and oil because they are running out. If we burn all the oil to generate electricity then there will be none left for other useful things we use oil for.
or is the conversion factor used to convert mole to particle.
<u>Explanation:</u>
The Avogadro's number named after the scientist "Amedeo Avogadrothe" and represented as <em>N</em> or <em>N </em>0. It is the number of constituent particles like atoms, molecules or ions which are present in one mole of salt or compound.
It is the dimensionless and international unit of amount of substance given as . The number of particles like atoms, molecules or formula units can be converted to moles by dividing the given particle value by Avogadro's number. . For example, if u want to convert molecules of into moles, then have to do as below,
The value of the Avogadro constant has been selected for all experimental purpose so that the mass of 1 mole of a chemical compound (in grams) is numerically equal to the average mass of one molecule of the compound.
<h2>Answer:</h2>
C. Gases only
<h3>Explanation:</h3>
Gases are the state of matter that has no definite shape and volume while liquids have no definite shape but have definite volume and solids have both definite shape and definite volume. so the correct option is "C".