Respuesta :
Correct answer is option c i.e. total weight of compound = [tex]74.4g[/tex] .
Explanation:
We have, an element P combines with another element Q in the weight ratio 1: 5. In the given situation , 15 g of P is made to react with 62 g of Q , Since both compounds are in ratio of 1:5 , According to for 15 g of P , (15×5)g of Q should be available i.e. 15 g of P requires 75 g of Q but in question we have 62 g of Q compound . Since, ratio of weight pf P:Q must be 1:5 , And so, for 62 g of Q ([tex]\frac{62}{5} = 12.4[/tex])g of P is required .
Now, total weight of compound = Amount of P + Amount of Q
⇒ total weight of compound = [tex]12.4 g + 62g[/tex]
⇒ total weight of compound = [tex]74.4g[/tex]
In this question , all compound Q is used but , P is unused as 12.4 g , So amount of P unused = 15-12.4 = 2.6 g.
∴Correct answer is option c i.e. total weight of compound = [tex]74.4g[/tex] .
