Asked by Sylvia

Calculate the weight of anhydrous Na2CO3 necessary to prepare M/20 solution in 100cm3 volumetric flask
Answered by DrBob222
Isn't this the same question posted immediately below this one? Didn't you get an answer?
Answered by Writeacher
Wow! Twenty minutes between posting the same problem.

You need to develop patience, as instructed on the Post a New Question page:

<b>Homework Posting Tips
...
Please be patient. All tutors are volunteers, and sometimes a tutor is not immediately available. Please be patient while waiting for a response to your question.</b>