chemistry lab questions 2

I have 2 chem lab  questions. the first one has tow part and I attached the experiment paper with the questions 1-what co cause the experimental wei to be(a)lower than expected (b)higher than expected (please not same explanation for both) 2-suppos the Mg used in the experiment had a thin oxide coating. how would this affect the ratio of moles of oxygen per mole of Mg (calcu quan in step 8) explain  pleas full answer as short as you can  please don’t si the hanf shak before being sure that you can do it right 

Are you looking for a similar paper or any other quality academic essay? Then look no further. Our research paper writing service is what you require. Our team of experienced writers is on standby to deliver to you an original paper as per your specified instructions with zero plagiarism guaranteed. This is the perfect way you can prepare your own unique academic paper and score the grades you deserve.

Use the order calculator below and get started! Contact our live support team for any assistance or inquiry.