an effervescent tablet is added to a test tube of water, producing a solution that fizzes and releases gas bubbles. The total ma
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Answer :
(i) The number of atoms present in 7 g of lithium are,
(ii) The number of atoms present in 7 g of lithium are,
(iii) The number of moles of is, 1 mole
The number of moles of is, 0.5 mole
The number of moles of is, 1 mole
Explanation :
<u>Part (i) :</u>
First we have to calculate the moles of lithium.
Molar mass of Li = 6.94 g/mole
Now we have to calculate the number of atoms present.
As, 1 mole of lithium contains number of atoms
So, 1.008 mole of lithium contains number of atoms
Thus, the number of atoms present in 7 g of lithium are,
<u>Part (ii) :</u>
First we have to calculate the moles of carbon.
Molar mass of C = 12 g/mole
Now we have to calculate the number of atoms present.
As, 1 mole of carbon contains number of atoms
So, 2 mole of carbon contains number of atoms
Thus, the number of atoms present in 7 g of lithium are,
<u>Part (iii) :</u>
<u>To calculate the moles of </u><u> :</u>
Molar mass of = 38 g/mole
Thus, the number of moles of is, 1 mole
<u>To calculate the moles of </u><u> :</u>
Molar mass of = 44 g/mole
Thus, the number of moles of is, 0.5 mole
<u>To calculate the moles of </u><u> ions :</u>
Molar mass of = 17 g/mole
Thus, the number of moles of is, 1 mole