Question

Amount of oxygen present in 81g of water is. (a) 70g (b) 71g (c) 72g (d) 73g. for class 9​

Answer 1

Answer:

we know water are find is 8:1 ratio.

so 8+1=9

amount of oxygen= 81

so ratio is 81/9

9

means oxygen 8×9=72g

and H=1×9=9 g

Hence c) 72g is correct option

Answer 2

Answer:

72 is the correct answer