What is the total number of atoms contained in 2.00 moles of nickel?

Answer 1

#2xxN_A#, where #N_A="the avocado number........"#

#N_A="Avogadro's number"#, where #N_A=6.022xx10^23*mol^-1#. This is simply a number like 10, or 12, or 100, or 1000. The reason we use #N_A# is that #N_A# #""^1H# atoms has a mass of #1*g# precisely. #N_A# is thus the numerical link between the sub-micro world of atoms and molecules to the macro world of grams and kilograms.
With our Periodic Table (beside you if you are doing your chemistry homework!) we find that the molar mass (i.e. the mass of #N_A# nickel atoms) is #58.7*g*mol^-1#.

Thus, we compute the product to determine the mass:

#"Mass"=2*molxx58.7*g*mol^-1=117.4*g#...........
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Answer 2

The total number of atoms contained in 2.00 moles of nickel is approximately ( 1.21 \times 10^{24} ) atoms.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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