Asked by Kien
                Suppose the elements x and y combine to form two compounds xy2 and x3y2. When 0.1 mole of xy2 weighs 10g and 0.05 mole of x3y2 weighs 9g, the atomic weight of x and y are 
a) 40,30
b) 60,40
c) 20,30
d) 30,20
            
            
        a) 40,30
b) 60,40
c) 20,30
d) 30,20
Answers
                    Answered by
            scott
            
    find the mole weights
x + 2y = 100
3x + 2y = 180
solve the system for x and y
    
x + 2y = 100
3x + 2y = 180
solve the system for x and y
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