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1. Which sample contains a total of 9.0 * 10 ^ 23 atoms ? A) 0.50 mole of HCI B) 0.75 mole of H 2 O C) 1.5 moles of Cu D) 1.5 moles of H 2

Respuesta :

c. 1.5 moles of Cu will contain a total of 9.0 * 10 ^ 23 atoms.

Explanation:

To convert moles into atoms,  the molar amount and number of atom is multiplied by Avagadro's number.

Avagadro's number is 6.022×[tex]10^{23}[/tex]  

So applying the formula in the given sample:

A) 0.5×6.022×[tex]10^{23}[/tex]

   3.01×[tex]10^{23}[/tex] atoms.

B) 0.75 mole of H20

O.75×6.022×[tex]10^{23}[/tex]

= 4.5166×[tex]10^{23}[/tex]  atoms.

C) 1.5 moles of Cu

  1.5×6.022×[tex]10^{23}[/tex]

  =  9.033×[tex]10^{23}[/tex]

D). 1.5 moles of H2

1.5 × 2 × 6.022 × [tex]10^{23}[/tex]

= 18.066 × [tex]10^{23}[/tex] atoms   because H2 is 2 moles of hydrogen.

Atom is the smallest entity of matter having property of the element to which it is a part.

Oseni

The sample that contains 9.0 x [tex]10^2^3[/tex] atoms would be 1.5 moles of Cu.

1 mole of a substance contains 6.0 x  [tex]10^2^3[/tex] atoms of the same substance. Thus:

  • 0.50 mole of HCl would contain: 0.5 x  6.0 x  [tex]10^2^3[/tex] = 3.0 x  [tex]10^2^3[/tex] atoms.
  • 0.75 mole of H2O would contain: 0.75 x  6.0 x  [tex]10^2^3[/tex] = 4.5 x  [tex]10^2^3[/tex] atoms.
  • 1.5 moles of Cu contain: 1.5 x  6.0 x  [tex]10^2^3[/tex] = 9.0 x  [tex]10^2^3[/tex] atoms
  • 1.5 moles of H2 contain: 1.5 x 2 x  6.0 x  [tex]10^2^3[/tex] = 18.0 x  [tex]10^2^3[/tex] atoms

Hence, the only sample that contains  9.0 x  [tex]10^2^3[/tex] atoms is 1.5 mole of Cu.

More on number of atoms of substances can be found here: https://brainly.com/question/10614569?

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