Answer: 72 grams of
are needed to completely burn 19.7 g 
Explanation:
According to avogadro's law, 1 mole of every substance weighs equal to molecular mass and contains avogadro's number
of particles.
To calculate the number of moles, we use the equation:

Putting in the values we get:


According to stoichiometry:
1 mole of
requires 5 moles of oxygen
0.45 moles of
require=
moles of oxygen
Mass of 
72 grams of
are needed to completely burn 19.7 g 
Answer:
a) 0.210 j
/k
b) 0.032 j/k
Explanation:
Find the attachment for solution
Answer:
Digestion take place in Fats.
Answer:

Explanation:
Oxygen has eight eletrons and six valence electrons, giving it the electron configuration of
.