Cindy runs 2 kilometers every morning. She takes 2 minutes for the first 250 meters 4 minutes for the next 1000 meters 1 minute
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Answer: There are atoms of hydrogen are present in 40g of urea,
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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:- atoms of Cu are equals to 4.45 moles.
Solution:- It is a atoms to moles unit conversion for which we divide the given number of atoms by Avogadro number.
We have been given with atoms and asked to convert them to moles.
The set up for this unit conversion problem would be as:
= 4.45 moles
So, there would be 4.45 moles of Cu in atoms of Cu.