Question

the weight of pure potash alum (k2so4.al2(so4)3.24h20 which contains 0.64 kg oxygen is ?

Answer 1

1 mole of pure potash alum contains 40 atoms of oxygen
40 atoms of oxygen weigh=40*16=640 g=0.64kg
That means that 1 mole of pure potash alum is present
Weight of 1 mole of pure potash alum
=2*39+4*32+2*27+40*16+48*1
=948 g
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Answer 2

Answer:

9.48g

Explanation:

calculate mass of potash alum and then ...