11 grade chemistry others
Calculate the formula unit mass of ZnO. [Given: Zn = 65 u, O = 16 u]
A) 80
B) 69
C) 82
D) 81
Calculate the formula unit mass of ZnO. [Given: Zn = 65 u, O = 16 u]
A) 80
B) 69
C) 82
D) 81
1 Answer
Askiitians Tutor Team
To calculate the formula unit mass (u) of ZnO (Zinc oxide), you need to add the atomic masses of all the atoms in the chemical formula.
The chemical formula of ZnO indicates that it consists of one atom of zinc (Zn) and one atom of oxygen (O).
The atomic mass of zinc (Zn) is 65 u.
The atomic mass of oxygen (O) is 16 u.
Now, add the atomic masses of Zn and O to find the formula unit mass of ZnO:
Formula Unit Mass (ZnO) = Atomic Mass of Zn + Atomic Mass of O
Formula Unit Mass (ZnO) = 65 u + 16 u
Formula Unit Mass (ZnO) = 81 u
So, the formula unit mass of ZnO is 81 u.
The correct answer is D) 81.
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