A compound of magnesium contains $$21.9\% $$ magnesium, $$27.8\% $$ phosphorus and $$50.3\% $$ oxygen. What will be the simplest formula of the compound ?
A.
$$M{g_2}{P_2}{O_7}$$
B.
$$MgP{O_3}$$
C.
$$M{g_2}{P_2}{O_2}$$
D.
$$Mg{P_2}{O_4}$$
Answer :
$$M{g_2}{P_2}{O_7}$$
Solution :
Element
Percentage
Molar ratio
Relative ratio
Whole no. ratio
$$Mg$$
21.9
$$\frac{{21.9}}{{24}} = 0.91$$
1
2
$$P$$
27.8
$$\frac{{27.8}}{{31}} = 0.90$$
1
2
$$O$$
50.3
$$\frac{{50.3}}{{16}} = 3.14$$
3.48
7
Formula of the compound $$ = M{g_2}{P_2}{O_7}$$
Releted MCQ Question on Physical Chemistry >> Some Basic Concepts in Chemistry
Releted Question 1
$$27 g$$ of $$Al$$ will react completely with how many grams of oxygen?