all the formulas of mole concept with example
Answers
Answer:
The formula mass of a covalent compound is also called the molecular mass. A convenient amount unit for expressing very large numbers of atoms or molecules is the mole. Experimental measurements have determined the number of entities composing 1 mole of substance to be 6.022 × 1023, a quantity called Avogadro's number.
The Mole Concept with Examples. Atomic Mass Unit with Examples. Since atoms are too small particles we can not measure their weights with normal methods. Thus, scientist find another way to measure mass of atoms, molecules and compounds. They approve one atom of carbon isotopes 6C12 as 12 atomic mass unit.
Answer:
A mole of a defined substance is defined as the mass of that substance containing the same number of fundamental units just like atoms in 12.0 g of 12C. These fundamental units can be atoms, molecules, or formula units based on the substance. It represents the number of chemical elements.
Explanation:
Example 1
Determine the number of moles in 0.325g of barium hydroxide.
Solution:
Given values are,
Mass of Ba(OH)2 = 0.325g
Mass of one mole of Ba(OH)2 = 171g
Number of moles formula is expressed by,
Number of moles = Mass of substance / Mass of one mole
= 0.325 / 171
= 0.00190 mol