February 28, 2017

Homework Help: Chemistry URGENT

Posted by jazz on Thursday, April 24, 2014 at 11:36pm.

I am not good with math problems. I need help with these two problems. I'm not sure what equations to use. please help.
A student heated a hydrated salt sample with an initial mass of 4.9702 g. After the first heating, the mass had decreased to 3.0662g.
1. if the sample was heated to constant weight after reheating, what is the minimum mass that the sample can have after the second weighing? Show how you determined your answer.
2. the student determined that the mass lost by the sample was 1.8053. What was the percent in the original hydrated sample. Show calculation setup.
thanking you in advance

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