the number of atom in 0.004g of mg will be
siril:
do u mean magnesium?
ya
ok
Answers
Answered by
5
24 grams of magnesium means 1 mole
0.004 grams of magnesium indicates 1.66 x 10⁻⁴ moles
1 mole contains Avogadro number(6 x 10²³) of atoms of magnesium.
so,
1.66 x 10⁻⁴ moles contains 1.66 x 10⁻⁴ x (6 x 10²³) atoms of magnesium
= 9.96 x 10⁻¹⁹ atoms of magnesium
0.004 grams of magnesium indicates 1.66 x 10⁻⁴ moles
1 mole contains Avogadro number(6 x 10²³) of atoms of magnesium.
so,
1.66 x 10⁻⁴ moles contains 1.66 x 10⁻⁴ x (6 x 10²³) atoms of magnesium
= 9.96 x 10⁻¹⁹ atoms of magnesium
wrong answer hai broo
wrong answer
ya
why did u report it i would have edited it na......only in the last step i by mistake put it - instead of +
???
i didn't report
ok leave it
Answered by
3
atomicity - number of atoms
molar mass of the Mg = 24g/mol
___________________________
mass = number of moles × molar mass
0.004 = number of moles × 24
0.004/24 = number of moles
0.00016 = number of moles
16 × 10^-5 = number of moles
_______________________
1 mole of any substance contains exactly the 6.022×10^23 molecules
atoms = atomicity × number of moles × 6.022×10^23
atoms = 1 × 16×10^-5 ×6.022 × 10^23 (here we take 1 because there are 1 atom of Mg present if two are there take two)
atoms = 96.352 × 10^23-5
atoms = 96.352 × 10^18 “ Mg atoms ”
_______________________________
molar mass of the Mg = 24g/mol
___________________________
mass = number of moles × molar mass
0.004 = number of moles × 24
0.004/24 = number of moles
0.00016 = number of moles
16 × 10^-5 = number of moles
_______________________
1 mole of any substance contains exactly the 6.022×10^23 molecules
atoms = atomicity × number of moles × 6.022×10^23
atoms = 1 × 16×10^-5 ×6.022 × 10^23 (here we take 1 because there are 1 atom of Mg present if two are there take two)
atoms = 96.352 × 10^23-5
atoms = 96.352 × 10^18 “ Mg atoms ”
_______________________________
see my answer once again i am write there 18
he took round figure 1.6 instead of 1.66 ........thats why there is a little bit of change ........i got 9.96 and he got 9.6
no broo the answer is 10 to the power 20
ok i'll check
check
is the answer 1 x 10^20
if 10 power 20 then answer is 96.352 × 10^18 = 0.96352 × 10^20 that is it my answer also right
i got 9.9 x 10^19 which is the same
then 9.9 × 10^19 = 0.99 × 10^20 that is It
yup
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