The number of oxygen atoms in 4.4 g of
CO2 is
(A) 6 × 10²³ (B) 11 × 10²³
(C) 12 × 10²³ (D) 1.2 × 10²³
Answers
Answered by
5
So, Option D) 1.2 × 10²³ is Correct Answer.
Answered by
4
(D) 1.2 ×10^23
QUESTION
The number of oxygen atoms in 4.4 g of CO2 is
OPTIONS
(A) 6 × 10²³
(B) 11 × 10²³
(C) 12 × 10²³
(D) 1.2 × 10²³
FORMULA USED
WE KNOW
C stands for atomic symbol of Carbon
O stands for atomic symbol of oxygen
atomic mass of nitrogen (C) is 12
atomic mass of hydrogen (O) is 16
SOLUTION
step 1
calculate the molecular mass of CO2
CO2= C+O+O
= C +2O
molecular mass = atomic mass of carbon + 2 x atomic mass of oxygen
so molecular mass of CO2 is 44 u
step 2
calculate the number of molecules in given weight
step 3
calculate number of atoms
HOPE IT HELPS
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