1.

A sample of phosphorus trichloride (PCl_3)contains 1.4 moles of the substance. How many atoms are there in the sample ?

Answer»

4
5.6
`8.431 XX 10^23`
`3.372 xx 10^24 `

SOLUTION :1 mol of `PCl_3` CONTAINS = `4 xx 6.02 xx 10^23` atoms
1.4 mol of `PCl_3` will CONTAIN ` = 4 xx 6.02 xx 10^23 xx 1.4 `
`= 3.372 xx 10^24` atoms


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