What is the number of moles of Sodium Chloride (NaCl) that is present in 29.22g sample of it?

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What is the number of moles of Sodium Chloride (NaCl) that is present in 29.22g sample of it?

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there are 0.5 moles of NaCl present in a 29.22g sample.

to find moles of a compound you would look at the periodic table to find the mass. in this case, the mass of NaCl is 58.44 g/mol. now, you divide the sample mass of 29.22g by 58.44 g/mol. the grams will cancel each other out and you’re left with 0.5 mol in that sample

hope this helps!

Answer:Explanation:We are asked to convert grams to moles. We must use the molar mass or the grams in 1 mole of a substance. These values are found on the Periodic Table as the atomic mass, but the units are grams per mole (g/mol) instead of atomic mass units (amu).

We are given the compound sodium chloride or NaCl. Look up the molar masses of the individual elements.

The formula for the compound does not contain any subscripts, so there is 1 mole of each element in 1 mole of the compound. Add the molar masses together to find sodium chloride’s molar mass.

Now we can use the molar mass to create a ratio. We know there are 58.4397693 grams of NaCl in 1 mole of NaCl.

Multiply by the number of grams provided in the problem: 29.22

Flip the ratio so the units of grams of NaCl cancel.

The original measurement of grams has 4 significant figures, so our answer must have the same. For our answer, that is the ten-thousandth place. The 0 to the right of this place (0.5000

019738) tells us to leave the 0 in the ten-thousandth place.There are approximately

0.5000 moles of sodium chloride in a 29.22 gram sample of sodium chloride.