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The atomic weights of two elements A and B are 40 u and 80 u, respectively. If xg of A contains y atoms, how many atoms are present in 2x g of B?
- a)y/2
- b)y/4
- c)y
- d)2y
Correct answer is option 'C'. Can you explain this answer?
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The atomic weights of two elements A and B are 40 u and 80 u, respecti...
One mole of any element contains NA entities.
Number of atoms in
Number of atoms in
Number of atoms in
Number of atoms in
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The atomic weights of two elements A and B are 40 u and 80 u, respecti...
Given Data:
Atomic weight of element A, m(A) = 40 u
Atomic weight of element B, m(B) = 80 u
Mass of element A, xg
Number of atoms in xg of A, y
Calculation:
1. Calculate the number of atoms in 1g of A:
Number of atoms in 1g of A = Avogadro's number / Atomic weight of A
= 6.022 x 10^23 / 40
= 1.5055 x 10^22 atoms
2. Calculate the number of atoms in xg of A:
Number of atoms in xg of A = y * 1.5055 x 10^22
3. Calculate the number of atoms in 2xg of B:
Mass of 1 atom of B = m(B) / Avogadro's number
= 80 / 6.022 x 10^23
= 1.329 x 10^-22 g/atom
Number of atoms in 2xg of B = (2x) / (1.329 x 10^-22)
= 1.5055 x 10^22 atoms
Final Answer:
Therefore, the number of atoms present in 2xg of B is y, which is the same as the number of atoms in xg of A. Hence, the correct answer is option C) y.
Atomic weight of element A, m(A) = 40 u
Atomic weight of element B, m(B) = 80 u
Mass of element A, xg
Number of atoms in xg of A, y
Calculation:
1. Calculate the number of atoms in 1g of A:
Number of atoms in 1g of A = Avogadro's number / Atomic weight of A
= 6.022 x 10^23 / 40
= 1.5055 x 10^22 atoms
2. Calculate the number of atoms in xg of A:
Number of atoms in xg of A = y * 1.5055 x 10^22
3. Calculate the number of atoms in 2xg of B:
Mass of 1 atom of B = m(B) / Avogadro's number
= 80 / 6.022 x 10^23
= 1.329 x 10^-22 g/atom
Number of atoms in 2xg of B = (2x) / (1.329 x 10^-22)
= 1.5055 x 10^22 atoms
Final Answer:
Therefore, the number of atoms present in 2xg of B is y, which is the same as the number of atoms in xg of A. Hence, the correct answer is option C) y.
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The atomic weights of two elements A and B are 40 u and 80 u, respectively. If xg of A contains y atoms, how many atoms are present in 2x g of B?a)y/2b)y/4c)yd)2yCorrect answer is option 'C'. Can you explain this answer?
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The atomic weights of two elements A and B are 40 u and 80 u, respectively. If xg of A contains y atoms, how many atoms are present in 2x g of B?a)y/2b)y/4c)yd)2yCorrect answer is option 'C'. Can you explain this answer? for JEE 2024 is part of JEE preparation. The Question and answers have been prepared according to the JEE exam syllabus. Information about The atomic weights of two elements A and B are 40 u and 80 u, respectively. If xg of A contains y atoms, how many atoms are present in 2x g of B?a)y/2b)y/4c)yd)2yCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for JEE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The atomic weights of two elements A and B are 40 u and 80 u, respectively. If xg of A contains y atoms, how many atoms are present in 2x g of B?a)y/2b)y/4c)yd)2yCorrect answer is option 'C'. Can you explain this answer?.
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