Answer:
I guess it is false... because compound is not single unit substance
To answer your question, "What it means when it says online that your tax return has been received and is being processed?": This means that the IRS or the Internal Revenue Service or IRS has received your tax return document and they will be processing it. Getting the refund will take 21 days and will be updated after 24 hours when you have submitted it online and 4 weeks when you mail it.
What i would have done is help the girl with her homework. When we are working the homework out or reading i will ask why is it not done. I would ask one more time after she gets done then we would watch a movie.