logo

Ask Questions, Get Answers

 
X
 Search
Want to ask us a question? Click here
Browse Questions
Ad
0 votes

Two elements $X$(atomic weight =$75$) and $Y$(atomic weight =16) combine to give a compound having $75.8 \%\; X$. The formula of the compound is

$ (a)\;XY \\(b)\;X_2Y\\(c)\;X_2Y_2\\(d)\;X_2Y_3 $
Can you answer this question?
 
 

1 Answer

0 votes
Toolbox:
  • Step 1. If you have masses go onto step 2. If you have % composition of the elements. Assume the mass to be 100g, so the % becomes grams.
  • Step 2. Determine the moles of each element.
  • Step 3. Determine the mole ratio by dividing each elements no. of moles by the smallest value from step 2.
  • Step 4. Double, triple, … to get an integer if they are not all whole numbers
image
$\therefore$ emprical formula $=X_2Y_3$
Hence d is the correct answer.
answered Mar 4, 2014 by meena.p
edited Mar 25, 2014 by mosymeow_1
 

Related questions

Ask Question
student study plans
x
JEE MAIN, CBSE, NEET Mobile and Tablet App
The ultimate mobile app to help you crack your examinations
Get the Android App
...