When hydrogen peroxide and manganese dioxide are mixed together, what gas is produced?

When solid magnesium and hydrochloric acid are mixed together, what gas is produced?

And lastly when calcium carbonate and hydrochloric acid are mixed together, what gas is produced?

Thanks so much in advance for taking the time to consider my question.

https://www.askmehelpdesk.com/math-s...board-b-u.html

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Originally Posted by kp2171

https://www.askmehelpdesk.com/math-s...board-b-u.html

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Thank you for replying, however your post wasn't of any help. These questions were simply the questions that I require further assistance on solving them.

my post stated that we won't do homework for you, and as I would tell any student who came to me for help, you need to try the problems and explain what you are having difficulty with. Expecting other to do the problems for you doesn't teach you.

that said, here a hint. Metals don't form gases in these reactions. Meaning you aren't going to see magnesium or calcium gas. How does this help a little? Well, all the available elements are in the equation... meaning that you shouldn't say, for ex, that nitrogen gas is produced from a reaction of reagents that do not contain nitrogen...

OK... so you need to list the formulas for the compounds listed first... it lets you know what elements are involved, and the think about what kinds of gases you might see... don't make this too hard. You know common gases, such as O2, N2, CO, CO2, etc...

also, don't be afraid to use search engines. I'm guessing at least two of your reactions can be found using Yahoo.

lastly, the textbook many times will have some of the answers to the questions. I can't tell you how many times students said "i can't answer this" when the same question was in the reading... so don't be afraid to open the book.

regarding my first email... we are more than willing to help when people try to answer the questions... so think about what I said, and then try the problems. Feel free to post your answers. We are always more willing to help when someone attempts the problem and posts their answers.