Wow thats pretty hard its asking how many is in each of those
I have provided the steps to figure out the number of atoms in the chemical compound.
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,
.
It can be separated by physical means and is not uniform in composition.
Answer:
earth is were humans live for live and the moon controls the water and the sun gives heat for us humans and plants and life
Explanation: