1.

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Answer»

Answer:

write the REACTION of thermal decomposition of SODIUM azide.

only reaction one mark questionThis is a

difference of squares

In general factorised as follows.

¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯

a

a

a

2

b

2

=

(

a

b

)

(

a

+

b

)

a

a

−−−−−−−−−−−−−−−−−−−−−−−−−

Note:

49

x

2

=

(

7

x

)

2

and

16

y

2

=

(

4

y

)

2

let a = 7x and b = 4y and SUBSTITUTE



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