i am very confuse in chemistry. plz help in mole concept formulas. plzz tomorrow i have a exam.
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cool down it's very simple
In ncert its not much given about mole concept
to find out no. of moles you should be well introduced with the atomic mass given in periodic table
firstly whenever a question for mole concept arises there will always be a mass given to you of any molecule or element
you call it as given mass
it should be in Grams if not then you can convert it into Grams
then you have to find out the molar mass of the given substance
[e.g. molar mass of H2O =2×H+1×O
=2×1+16
(atomic masz of Hydrogen is 1 and oxygen is 16)
=>18g]
To find the number of moles divide molar mass by given mass
i.e. n=m/M
now, to the next topic 1 mole= 6.022×10^23 atoms/molecule
{example: - no. of atom in 2 mole of S
1 mole= 6.022×10^23 atoms
2mole= 2×6.022×10^23 atoms
i.e. 12.044×10^23 atoms}
hope this might help you
all the best for your exam ,do your best
In ncert its not much given about mole concept
to find out no. of moles you should be well introduced with the atomic mass given in periodic table
firstly whenever a question for mole concept arises there will always be a mass given to you of any molecule or element
you call it as given mass
it should be in Grams if not then you can convert it into Grams
then you have to find out the molar mass of the given substance
[e.g. molar mass of H2O =2×H+1×O
=2×1+16
(atomic masz of Hydrogen is 1 and oxygen is 16)
=>18g]
To find the number of moles divide molar mass by given mass
i.e. n=m/M
now, to the next topic 1 mole= 6.022×10^23 atoms/molecule
{example: - no. of atom in 2 mole of S
1 mole= 6.022×10^23 atoms
2mole= 2×6.022×10^23 atoms
i.e. 12.044×10^23 atoms}
hope this might help you
all the best for your exam ,do your best
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