Unfortunately, its sometimes hard to find a research paper for the most simple chemistry questions. While you're here, try re-reading the forum rules, that I posted above, we want you to do some of the work. Whoever assigned you this problem, probably expects the same, so you'll have to pardon me, if I fail to subvert that.
Thank you for the link to Wikipedia, I actually browsed it myself, as soon as you posted your question. Did you read it? What does it say? What is the chemical formula of hydromagnesite? What chemical elements is it made of? What chemical reactions have you recently learned, that might make sense as an answer to your question? If you check, I asked those questions in my post above. Do you have an answer to any of my simpler questions, that we can use to build an answer to your question?
The more I've been able to think about it, the more I've figured out I may have been hasty saying that didn't see an obvious answer. The problem is a little advanced for 1 year chemistry, but may be solvable.