What is the molar mass (gram formula mass) for the compound sodium thiosulfate, $Na_2S_2O_3$ ?

Question

24900 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2018-03-15T02:01:09

I get $158.13 \ "g/mol"$ .

To calculate the molar mass of sodium thiosulfate, $Na_2S_2O_3$ , we need to find all the molar masses of the elements, and add them together.

$Na$ has a molar mass of $23 \ "g/mol"$ . So, $Na_2$ will have a molar mass of $23 \ "g/mol"*2=46 \ "g/mol"$ .

$S$ has a molar mass of $32.065 \ "g/mol"$ . So, $S_2$ will have a molar mass of $32.065 \ "g/mol"*2=64.13 \ "g/mol"$ .

$O$ has a molar mass of $16 \ "g/mol"$ . Therefore, ozone, or $O_3$ , will have a molar mass of $16 \ "g/mol"*3=48 \ "g/mol"$ .

Adding all the molar mass together, we find that the molar mass of sodium thiosulfate $(Na_2S_2O_3)$ is:

$46 \ "g/mol"+64.13 \ "g/mol"+48 \ "g/mol"$

$=158.13 \ "g/mol"$ .

What is the molar mass (gram formula mass) for the compound sodium thiosulfate, Na_2S_2O_3Na_2S_2O_3?