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, .
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Answer:
it has a huge electronegativity difference between it's atoms
They<span> combine as atoms, and separate as ions. When </span>sodium and chlorine<span> atoms come together to </span>form sodium chloride(NaCl<span>), </span>they<span> transfer an electron. The </span>sodium<span> (Na) atom transfers one electron to the </span>chlorine<span> (Cl) atom, so that </span>they<span>both have full outer shells. ... When this </span>happens<span>, the atom is called a positive ion.
What do think the answer is now?</span>
