which of the following has highest number of molecules a)10g of N2O4 b)10g of NO c)10g of N2O d)10g of NO2
Answers
Answer:
10 g of N2O4
Explanation:
From the following list, 10 g of N2O4 has the highest number of molecules .
a )10 g of N2O4
b )10 g of NO
c )10 g of N2O
d )10 g of NO2
Hence , option a will be correct as it has the highest number of molecules .
Answer:
Explanation:
a) 10 g of N₂O₄
b) 10 g of NO
c) 10 g of N₂O
d) 10 g of NO₂
CALCULATION OF NUMBER OF MOLECULES
a) 10 g of N₂O₄
Molar mass of N₂O₄ = 2 x 14 + 4 x 16 = 92 g/mol
Number of moles of N₂O₄ = 10/92 moles = 0.108 moles
Number of molecules in 0.108 moles of N₂O₄ = 0.108 x 6.022 x 10²³
= 0.65 x 10²³ molecules
b) 10 g of NO
Molar mass of NO = 14 + 16 = 30 g/mol
Number of moles of N₂O₄ = 10/30 moles = 0.33 moles
Number of molecules in 0.33 moles of NO = 0.33 x 6.022 x 10²³
= 1.98 x 10²³ molecules
c) 10 g of N₂O
Molar mass of N₂O = 2 x 14 + 16 = 44 g/mol
Number of moles of N₂O = 10/44 moles = 0.23 moles
Number of molecules in 0.108 moles of N₂O₄ = 0.23 x 6.022 x 10²³
= 1.38 x 10²³ molecules
d) 10 g of NO₂
Molar mass of NO₂ = 14 + 2 x 16 = 46 g/mol
Number of moles of N₂O₄ = 10/46 moles = 0.22 moles
Number of molecules in 0.108 moles of N₂O₄ = 0.22 x 6.022 x 10²³
= 1.32 x 10²³ molecules
Hence, 10 g of N₂O has highest number of molecules.