→ Nitric aaed can be prepared from NH3 in 3 steps
4NH3 + 502
UNO + 6H2O
ZNO t Oz
2NOZ
I + H₂O - Nocg) + 2HNO3
% greld of I n I are 507) 60%, 80%.
да
ammonia requered to produce
1575 gm HNO3 !​

What is the question

Ok where is the image ?

The independent variable is the type of music.the dependent variable is the pulse rate.the intervening variable is the age of the subject.if the mother does not like rock, her pulse is likely to not increase.the same might be true for the sister.the friend may like rap and gets excited.to establish cause/effect relationship, all of the subjects must be consistent.hope i .