1. Calculate the number of moles for the following:
(i) 52 g of He (finding mole from mass)
(ii) 12.044 × 1023 number of He atoms (finding mole from number of particles).
2. Calculate the number of moles for the following:
(i) 52 g of He (finding mole from mass)
(ii) 12.044 × 1023 number of He atoms (finding mole from number of particles).
3.Calculate the mass of the following:
(i) 0.5 mole of N of molecule)
(ii) 0.5 mole of N atoms (mass from mole of atom)
(iii) 3.011 × 1023 number of N atoms (mass from number)
(iv) 6.022 × 10 23 number of N2 molecules (mass from number)
4.Calculate the number of particles in each of the following:
(i) 46 g of Na atoms (number from mass)
(ii) 8 g O 2 molecules (number of molecules from mass)
(iii) 0.1 mole of carbon atoms
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Answer:
(ii) 0.5 mole of N atoms (mass from mole of atom)
(iii) 3.011 × 1023 number of N atoms (mass from number)
(iv) 6.022 × 10 23 number of N2 molecules (mass from number)
4.Calculate the number of particles in each of the following:
Answer:
No of Moles = 6.022×10
2312.044×10
23 = 2.
Now, atomic mass of He=4
Weight = 2×4 = 8 g
here, no of moles = 23/46 =2 so no of gram atoms are 2.
Explanation:
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