Question

In the following samples
1)6.6g of co2
2) 92g of No2
3)12.8g of s
4)6.9 g of Na

Calculate in all the samples.
1)no. Of moles
2)no. Of atoms/molecule
3)no. Of nucleons
4)no. Of electron
5)no. Of neutron
6)no. Of proton

Of all the samples

Plz. Help me guys if u know the answer then plz. Help or don't know leave it plz.
5)no. Of neutron
6)

Answer 1

1)Number of moles of CO2 = 6.6/44
= 0.15moles

Now this is the important part,
1mole of CO2 contains Avogadro number of molecules of CO2.

But each molecule of CO2 contains 3 atoms in it (1 carbon and 2 oxygen atoms)
So,
1mole of CO2 contains "3x Avogadro number" of 'atoms'

2)
So 0.15 moles of CO2 contains
'0.15( 3 x Avogadro number of atoms)' = 2.7 x 10²³ atoms

In CO2, Number of protons = number of electrons = 6+8+8= 22

Number of neutrons=molar mass - number of protons= 44 - 22 = 22

So,
Number of protons in 0.15 moles of CO2 = 22 (0.15 x Avogadro number)
                                                                 = 1.98 x 10²⁴ protons

Now, SINCE THE NUMBER OF PROTONS, NEUTRONS AND ELECTRONS ARE THE SAME, THUS THE ABOVE VALUE IS THE ANSWER FOR QUESTIONS 4, 5 AND 6.

The number of nucleons...that is neutrons + protons = 44
3)So,
The number of nucleons in 0.15moles of CO2= 0.15( 44 x Avogadro number)
                                                                        = 3.96 x 10²⁴ nucleons

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1) Number of moles in 12.8 grams of S = 12.8/32 = 0.4moles

Number of atoms of Sulphur in 1mole = 1 x Avogadro number of atoms
So,
2) Number of atoms in 0.4 moles = 0.4 x Avogadro number
                                                = 2.4 x 10²³ atoms of S

In Sulphur the number of neutrons = electrons = protons = 16
Therefore,
the number of protons in 0.4 moles of S=16 (0.4 x Avogadro number) 
                                                               = 3.84 x 10²⁴ protons

AS THE NUMBER OF PROTONS = NUMBER OF ELECTRONS = NUMBER OF NEUTONS, THE ABOVE VALUE IS THE ANSWER FOR QUESTIONS 4, 5 AND 6.

The number of neucleons = (neutrons + protons) = 16 + 16 = 32

Therefore, 
the number of nucleons in 0.4 moles of S = 32 (0.4 x Avogadro number)
                                                                  = 32 (0.4 x 6 x 10²³)
                                                                  = 7.68 x 10²⁴ nucleons