Plz solve 19th

Asked by lovemaan5500 | 30th Jan, 2018, 06:27: AM

Expert Answer:

space space As comma space 112 space cm cubed space has space straight a space mass space of space 0.63 space straight g

therefore space 22400 space cm cubed space will space have space fraction numerator 22400 cross times 0.63 over denominator 112 end fraction

space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space equals space 126 space straight g

Relative space molecular space mass equals space 126 space straight g.

Let space the space formula space of space fluoride space is space PF subscript straight x

Formula space mass space equals space straight P space plus space xF

space space space space space space space space space space space space space space space space space space space space space space space space space space space space space equals space 31 plus 19 straight x

We space have space molecular space mass space of space PF subscript straight x equals space 126

therefore space 31 plus 19 straight x space equals space 126

space space space space space space space space space space space space space 19 straight x space equals space 126 minus space 31

space space space space space space space space space space space space space 19 straight x space equals space 95

space space space space space space space space space space space space space space space space space straight x space equals space 95 over 19

space space space space space space space space space space space space space space space space space straight x space equals space 5

therefore space The space formula space of space phosphorous space fluoride space is space PF subscript 5.

Answered by Varsha | 30th Jan, 2018, 01:16: PM