Question
sodium reacts completely with 0.142kg of chlorine, forming 234g of sodium chloride. What mass of sodium reacted?
I know that for chemical changes the amounts should end up being equal, but I don't know how to set up the problem.
I know that for chemical changes the amounts should end up being equal, but I don't know how to set up the problem.
Answers
Damon
It is the number of atoms, or moles, of Na which is equal to the number of atoms, or moles, of Cl in NaCl
Na = 23 grams/mol
Cl = 35.5 grams/mol
NaCl = 58.5 grams/mol
so if we ended up with 234 grams ofNaCl, that was 4 mols of NaCl
That requires 4*23 = 92 grams of Na
and
That requires 4*35.5 = 142 grams of Cl, sure enough
Na = 23 grams/mol
Cl = 35.5 grams/mol
NaCl = 58.5 grams/mol
so if we ended up with 234 grams ofNaCl, that was 4 mols of NaCl
That requires 4*23 = 92 grams of Na
and
That requires 4*35.5 = 142 grams of Cl, sure enough
anita
92.0
Student
92 is the correct answer.
jones
124
Someone
92.0g
emerald
92.0g