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How many atoms and how many gram atoms are there in 10 grams of calcium ?
  • a)
    0.25 gram atoms, 6.023 × 10-23 atoms
  • b)
    0.25 gram atoms, 1.50 × 1023 atoms
  • c)
    0.1 gram atoms, 6.023 × 1023 atoms
  • d)
    0.1 gram atoms, 1.50 × 10-23 atoms
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
How many atoms and how many gram atoms are there in 10 grams of calciu...
No.of particles = mass/ molecular mass x avagadro constant

mass of calcium = 10 g

molecular mass of calcium = 40 u

therefore no of particles = 10/40 x 6.022 x 10^23

= 1.5055 x 10^23.
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Most Upvoted Answer
How many atoms and how many gram atoms are there in 10 grams of calciu...

Calculation of atoms in 10 grams of calcium:

- The molar mass of calcium is 40 grams/mol.
- Therefore, the number of moles of calcium in 10 grams can be calculated as:
Number of moles = Mass / Molar mass = 10g / 40g/mol = 0.25 mol
- Avogadro's number states that there are 6.023 × 10^23 atoms in one mole of any element.
- Therefore, the number of atoms in 10 grams of calcium would be:
Number of atoms = Number of moles × Avogadro's number
= 0.25 mol × 6.023 × 10^23 atoms/mol
= 1.50 × 10^23 atoms

Conclusion:

- Hence, there are 0.25 gram atoms (0.25 moles) and 1.50 × 10^23 atoms in 10 grams of calcium.
- Option 'B' (0.25 gram atoms, 1.50 × 10^23 atoms) is the correct answer.
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Community Answer
How many atoms and how many gram atoms are there in 10 grams of calciu...
No.of particles = mass/ molecular mass x avagadro constant
mass of calcium = 10 g
molecular mass of calcium = 40 u
therefore no of particles = 10/40 x 6.022 x 1023
= 1.5055 x 1023.
=> Gram atoms is mole which is equal to =10/40
=0.25
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How many atoms and how many gram atoms are there in 10 grams of calcium ?a)0.25 gram atoms, 6.023 × 10-23atomsb)0.25 gram atoms, 1.50 × 1023atomsc)0.1 gram atoms, 6.023 × 1023atomsd)0.1 gram atoms, 1.50 × 10-23atomsCorrect answer is option 'B'. Can you explain this answer?
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