Question

Calculate the mass of the following

i). one atom of sodium ​

Answer 1

Answer:

1 mol Na = 22.990 g Na

1 mol Na = 6.022×10^23 atoms Na

Use dimensional analysis to calculate the mass of one Na atom.

22.990 g Na/mol Na × 1 mol Na/6.022×10^23 atoms Na = 3.818×10^-23 g Na/atom Na to four significant figures

One atom of sodium (Na) has a mass of ~3.818×10^-23 g.

Answer 2

Answer:

sodium has a atomic weight of 23

Explanation:

when you look at a periodic table of the elements, you see that sodium has a atomic weight of 23. this means that a single atom of sodium weighs 23 atomic mass units (AMUs), but it also means that one mole of sodium atoms weighs 23 grams. Hence 6.02x10^23 atoms of sodium weight a total of 23 grams.

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