The answer should be D hope this helps
Answer:
A safety guide lines are rules and regulations that are made to make sure place is safe and conducive for everyone.
It changes state
Meaning, it goes from solid to liquid, making it change its state. Hope this helped.
Answer:-
b. compound b will show an nh absorption while compound a will not.
Explanation:-
For compound B CH3CH2CH2NH2 there are two N-H bonds present. So it will show NH absorption.
But in compound A CH3CH2CH2N(CH3)2 there are no N-H bonds. So it will not show NH absorption.
H2S and HS- are a conjugate acid-base pair.