Question

Number of atoms present in 15 g of urea O 1 is HN-C-NH is​

Answer 1

Calculate the number of atoms of hydrogen present in 5.6 g of urea NH Co also calculate the number of atoms of N C and O

Answer 2

Molar mass of Area:-

$\\ \sf\longmapsto CH_4N_2O$

$\\ \sf\longmapsto 12u+4(1u)+2(14u)+16u$

$\\ \sf\longmapsto 12u+4u+28u+16u$

$\\ \sf\longmapsto 60u$

$\\ \sf\longmapsto 60g/mol$

• Given mass=15g

No of moles:-

$\\ \sf\longmapsto \dfrac{Given\:mass}{Molar\:mass}$

$\\ \sf\longmapsto \dfrac{15}{60}$

$\\ \sf\longmapsto 0.25mol$

No of atoms:-

$\\ \sf\longmapsto No\:of\:moles\times Avagadro \:No$

$\\ \sf\longmapsto 0.25\times 6.022\times 10^{23}$

$\\ \sf\longmapsto 1.505\times 10^{23}$

$\\ \sf\longmapsto 0.15\times 10^{24}$