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MaRussiya [10]
3 years ago
9

Sawing a board in half is an example of a chemical change

Chemistry
1 answer:
koban [17]3 years ago
4 0

Sawing a board in half is a physical change not a chemical change the board doesnt change wood or whatever material it is is still would still be wood
If it were burned it would be a chemical change but its properties stay the same atomically so thats why its not a chemical change.

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Mass % of nitrogen = mass of nitrogen*100  / total mass 

= 14*100 / (1+ 14 + 32)

= 14*100 / 47
= 29.7 % 



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