Question

What mass of sodium chloride is produced if 92.0 g if sodium reacts with excess chlorine?

Answer 1

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First step: write the reaction equation

Answer 2

2Na + Cl2 --> 2NaCl

Answer 3

Oke so the ratio is 2:1:1
when 2 moles of sodium reacts with 1 mole of chlorine, 2 moles of sodiumchloride is produced
Take a look at the diagram i attached to this post, Calculate how many moles are in 92.0 gram sodium

Answer 4

i am so confused. this is like speaking a different language to me

Answer 5

We have the mass of the Na in gram. We need the amount of moles Na.
So you divide by the molecular mass of Na.
You can find the molecular mass in a periodic table
Like here: http://www.ptable.com

Answer 6

so is the molecular mass 22.99?

Answer 7

yes, so when you have 92 gram Na and the mol. mass is 22.99, How many moles Na do you have? (remember, divide by molecular mass)

Answer 8

4.0?

Answer 9

Yes, so we have 4 moles sodium.
We know that 2 moles of sodium reacts with 1 mole chlorine to produce 2 moles sodiumchloride.
We now calculate the amount of moles of sodiumchloride that is produced with 4 moles sodium.
The ratio is 2:2

Answer 10

my question is multiple choice.. the options are a) 234 g NaCl b) 63 g NaCl
c) 116 g NaCl d) 58.5 g NaCl

Answer 11

Yea but we don't need multiple choice, we can calculate it :)
So how many moles NaCl is produced with 4 moles Na?

Answer 12

how do i calculate it?

Answer 13

Well with the ratio :)
we know 2 mol Na --> 2 mol NaCl
So for 4 mol Na, how many mol NaCl?