A 4.263 g sample of a hydrate of magnesium chromate, MgCrO4xH2O, was heated gently at 200 ?C in an evaporating dish. The sample was heated twice, for 5 minutes each, until a constant mass was obtained. The mass of the anhydrous salt (i.e. without water), MgCrO4, was found to be 2.595 g.a)Calculate the percent by mass of water in the sample.b)Calculate the moles of H2O removed by heating.c)Calculate the moles of MgCrO4remaining in the evaporating dish.d)Use your answers to parts b and c to determine x (as a decimal number with appropriate sig figs)=the mole ratio of water to anhydrous salt.e) Write the formula of this hydrate, using x rounded to an integer.
“I’m trying to write my paper and I’m stuck. Can you help me?”
Yes, we can help you achieve academic success without the uncessary stress of deadlines.
Our reliable essay writing service is a great opportunity for you to save your time and receive the best paper ever.
Sample of a hydrate
Plagiarism-free and delivered on time!
We are passionate about delivering quality essays.
Our writers know how to write on any topic and subject area while meeting all of your specific requirements.
Unlike most other services, we will do a free revision if you need us to make corrections even after delivery.