1.

A sample of phosphorus trichloride (PCl_(3)) contains 1.4 moles of the substances. How many atoms are there in the sample?

Answer»

`4`
`5.6`
`8.431xx10^(23)`
`3.373xx10^(24)`

Solution :1 mole of `PCl_(3)` contains 4 MOLES (1+3) of atoms
`:.` 1.4 moles of `PCl_(5)` contains 5.6 moles of atoms
`:.` No. of atoms `= 5.6xx6.02xx10^(23)`
`= 3.372xx10^(24)`


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