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The number of atoms presents in 20 g of...

The number of atoms presents in `20 g` of calcium will equal to the number of atoms presents in

A

`12 g C`

B

`12.15 g Mg`

C

`24.0 g C`

D

`24.3 gMg`

Text Solution

Verified by Experts

`24.3 g Mg = 1 mol, so 12.15 g = (1)/(2) mol`
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CENGAGE CHEMISTRY ENGLISH-ATOMIC STRUCTURE-Concept Applicationexercise(4.3)
  1. The number of atoms presents in 20 g of calcium will equal to the nu...

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  2. How many quantum number are needed in designate an orbital ? Name the...

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  3. The principal quantum number of n of an atomic orbitals is 5 what are ...

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  4. (a) An atomic orbital has n=3. What are the possible values of l? (b...

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  5. What is the lowest value of n that allows g orbital to exist?

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  6. Given the notation for the sub-shell deotected by the following quant...

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  7. How many electron on a fully filled f sub-shell have m(1) = 0 ?

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  8. An electron is in one of the 3d orbitals. Give the possible values of ...

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  9. If the largest value ofm(1) for an electron is + 3 in what type of su...

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  10. Explain giving reasons, which of the following sets of quantum numbers...

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  11. How many electron in atom may have the following quantum number ? A n ...

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  12. How many orbitals are possible in a. 4th energy level b. 5f sub-she...

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  13. What are the possible values of l and m(1) for an atomic orbital 4f?

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  14. What is the shape of 1s and 2s orbital .Give two point of difference ...

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  15. (a) How many sub-shells are associated with n = 4? (b) How many electr...

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  16. How many spherical nodes are present in 4s orbital in a hydrogen ato...

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  17. The principal quantum number representwsw

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  18. The energy of an electron of 2p(1) orbital is

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  19. The orbital angular momentum of an electron of an electron in 2s orbit...

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  20. The number of angular nodal planes of zero electron density in the d(...

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