Calculate the formula unit masses of $ZnO, Na_2O, K_2CO_3$ given atomic masses of $Zn=65\,u, Na=23\,u, K=39\,u, C=12\,u$ and $O=16\,u$.
- A$4\,u, 18\,u$ and $24\,u$
- B$81\,u, 62\,u$ and $138\,u$
- C$36\,u, 71\,u$ and $108\,u$
- D$12\,u, 24\,u$ and $36\,u$
Explore More
Similar Questions
Calculate the number of aluminium ions present in $0.051 \, g$ of aluminium oxide.
[Hint: The mass of an ion is the same as that of an atom of the same element. Atomic mass of $Al = 27 \, u$.]
[Hint: The mass of an ion is the same as that of an atom of the same element. Atomic mass of $Al = 27 \, u$.]
Difficult
View SolutionCalculate the molecular masses of $CO_2$,$CH_4$ and $C_2H_6$.
Medium
View SolutionCalculate the molecular masses of $C_2H_4$,$NH_3$ and $CH_3OH$.
Medium
View SolutionWhich postulate of Dalton's atomic theory can explain the law of definite proportions?
Easy
View SolutionWhat are polyatomic ions? Give examples.
Easy
View SolutionVedclass Products
For Students
Vedclass Test Series
Mock tests in real JEE/NEET style with performance analysis. 5-day free trial.
Start Free TrialFor Teachers
Exam Paper Generator
Generate Set A/B/C/D exam papers from 7.5L+ questions in 2 minutes. 3 chapters free.
Try FreeFor Institutes
Online Exam Module
Live online exams with unlimited students, 360° analytics & white-label branding.
See Demo