Amino Acids- To build proteins.
Hydrochloric Acids- Help humans digest foods.
Mass = no. of moles x molecular weight
m = n x Mr
m = 2.5 mol x (24 + [16 x 2])
m = 140g
Answer: 5.72 g mass of carbon dioxide was produced
Explanation:

Moles of C =
Mass of
reacted = 59.1 g - 17.5 g = 41.6 g
Moles of 
According to reaction 1 mole
produces 1 mole of
then 1.3 mole of
will produce
moles of 
Mass of
:
=Moles of
× molar mass of
= 1.3 ×44 g/mol =
=57.2 grams
5.72 g mass of carbon dioxide was produced
Question 1 is A.) an oxbow lake
Question 2 is C.) pebble