One mole of particles of any substance contains how many particles?
1 answer:
<u>Answer:</u> The correct answer is Option d.
<u>Explanation:</u>
According to mole concept:
1 mole of a substance contains number of particles.
This number is known as Avogadro's number.
The mass of 1 mole of a substance or Avogadro number of particles has the mass equal to molar mass of that substance.
Hence, the correct answer is Option d.
You might be interested in
The given word equation is:
Nitrogen trifluoride-->Nitrogen + Fluorine
The chemical formula of nitrogen trifluoride is and that of nitrogen gas is
and fluorine gas is
.
The balanced chemical equation representing the decomposition reaction of nitrogen trifluoride to nitrogen and fluorine will be,
The chemical formula of fluorine gas will be as fluorine exists as a diatomic gas in it's pure state. The coefficient of fluorine will be 3
Therefore, the correct answer is a) 3F2
Answer:
The amount of Mg was enough
Explanation:
In this case, we have to start with the <u>reaction</u> between and
, so:
If we check <u>the reaction is already balanced</u>. Now, we can do some stoichiometry to calculate the amount of Mg. The first step is the number of moles of . To this we have to calculate the molar mass of
first, so:
Cu: 63.55 g/mol and O: 16 g/mol. So, (63.55+16)= 79.55 g/mol.
Now, we can calculate the moles:
The <u>molar ratio</u> between and
is 1:1, so:
.
Now we can <u>calculate the mass of M</u>g if we know the atomic mass of Mg (24.305 g/mol). So:
<u>With this in mind, the student added enough Mg to recover all the Cu.</u>
Note: The HCl doesn't take a role in the reaction. The function of HCl is to dissolve the .
I hope it helps!