Please solve the q 51?

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Answer 1 · 2018-05-02T16:42:43

The correct answer is #option (2)#

The reaction is :

#4A(s) +3O_2(g)rarr 2A_2O_3(s)#

#0.359 g # of A reacts with oxygen to give #=0.559g# of oxide

Let the atomic mass unit of #a# be #m_a#

Then,

#(4m_a+6*16)/(4m_a)=0.559/0.359#

#4m_a+96=6.23m_a#

#m_a=96/2.23=43.08 " amu "#

The correct answer is #option (2)#