Answer: There are 
atoms of hydrogen are present in 40g of urea, 
.
Explanation:
Given: Mass of urea = 40 g
Number of moles is the mass of substance divided by its molar mass.
First, moles of urea (molar mass = 60 g/mol) are calculated as follows.
According to the mole concept, 1 mole of every substance contains 
atoms.
So, the number of atoms present in 0.67 moles are as follows.
In a molecule of urea there are 4 hydrogen atoms. Hence, number of hydrogen atoms present in 40 g of urea is as follows.
Thus, we can conclude that there are atoms of hydrogen are present in 40g of urea, .
Answer:
c or d
Explanation:
i tried a and it was wrong. its not B. and i cant see the rest. its the one that looks like a catipillar tho
Energy is added to the chemical equation which bonds hydrogen and oxygen together in a chemical bond .
Answer:
C
Explanation:
This is because The polar group consist of 10 amino acids, two are negatively charged that is aspartic acid and glutamic acid, 3 have a positive charge - arginine, lysine and histidine, and 5 are uncharged
