Chemistry Assignment

Exercise # 3: [5 Marks]Given the following data
Calculate ΔH0 for the reaction using the Hess law.
Exercise # 3: [4 Marks]
In an experiment 26.0 g of powdered iron (III) oxide is mixed with 3g carbon and heated to 500°C in a
rigid 6.0 L reactor. The following reaction occurred:
Assume that the reaction is 100% complete, the volume of Fe(s) and C(s) is small enough to be
ignored, and the temperature of the reactor is maintained at 500 °C.
1. Write the balanced reaction.
2. Calculate the number of moles of gas formed.
3. What will be the pressure of the gas in the reactor after the reaction?
Exercise # 3: [5 Marks]
A chemist has to titrate an acid with a molecular formula containing only carbon, hydrogen, and oxygen
with the respective percentages: 53.66% (C), 4.09% (H) and 42.25% (O) by mass.
To reach the equivalence point the chemist used 18.02 mL of NaOH solution 0.0406 (M) to
neutralize 0.3602 g of this acid.
Assuming that the acid is monoprotic (there is only one acidic hydrogen per molecule of acid):
1. Calculate the number of mole of acid used in the titration.
2. What is the empirical formula of the acid?
3. What is the molecular formula of the acid?
Exercise # 4: [6 Marks]
Answer to the following short questions:
1. What is the percentage of chlorine present in MgCl2?
2. What is the volume in (L) of 25000 mg of oil if its density is 881 Kg/m3?
3. Find the error(s) and rewrite the text in the correct form.
“According to the Dalton model for the atomic structure, the atomic structure is
composed of a nucleus in the center and electrons orbiting around it. The Nucleus has
always the same number of protons and neutrons and they are located in the Nucleus.
The nucleus carries almost the whole of the mass of the atom. The nucleus is positively
charged and the electron is negatively charged. Anions are obtained when electrons
are lost. Anions and Cations form salts via ionic bonding. Salts are always soluble in
water. All Covalent compounds (molecules) are not soluble in water”.
4. What is the oxidation number of the Sulphur atom in HSO4-.
5. The following equation describes the burning of hexane (C6H14) in oxygen:
2 C6H14 + 19 O2
12 CO2 + 14 H2O
How many mole of water would be produced if 0.4 mole of hexane was burnt in excess

Don't use plagiarized sources. Get Your Custom Essay on
Chemistry Assignment
Just from $13/Page
Order Essay
Calculate the price
Make an order in advance and get the best price
Pages (550 words)
*Price with a welcome 15% discount applied.
Pro tip: If you want to save more money and pay the lowest price, you need to set a more extended deadline.
We know how difficult it is to be a student these days. That's why our prices are one of the most affordable on the market, and there are no hidden fees.

Instead, we offer bonuses, discounts, and free services to make your experience outstanding.
How it works
Receive a 100% original paper that will pass Turnitin from a top essay writing service
step 1
Upload your instructions
Fill out the order form and provide paper details. You can even attach screenshots or add additional instructions later. If something is not clear or missing, the writer will contact you for clarification.
Pro service tips
How to get the most out of your experience with Writall
One writer throughout the entire course
If you like the writer, you can hire them again. Just copy & paste their ID on the order form ("Preferred Writer's ID" field). This way, your vocabulary will be uniform, and the writer will be aware of your needs.
The same paper from different writers
You can order essay or any other work from two different writers to choose the best one or give another version to a friend. This can be done through the add-on "Same paper from another writer."
Copy of sources used by the writer
Our college essay writers work with ScienceDirect and other databases. They can send you articles or materials used in PDF or through screenshots. Just tick the "Copy of sources" field on the order form.
See why 20k+ students have chosen us as their sole writing assistance provider
Check out the latest reviews and opinions submitted by real customers worldwide and make an informed decision.
Great writer
Customer 454983, February 19th, 2022
Customer 455459, October 8th, 2022
Beyond expectations and more than I could ever anticipated. Thank you for the assistance. TRULY appreciated!!
Customer 454569, November 1st, 2020
fundamentals of intermodal transportation
perfect! thanks!
Customer 454525, March 30th, 2021
Great work as always
Customer 454983, January 28th, 2022
Got an A in this project.
Customer 453877, September 5th, 2020
Health Care
Thank you for all your hard time.
Customer 454677, March 31st, 2021
Thank you!!!
Customer 455113, April 5th, 2022
Film & Theater studies
Amazing job. Thank you
Customer 454983, November 24th, 2021
Business Studies
This is exactly what I was looking for and you all helped me out so much! Thank you!!!!!
Customer 454769, June 16th, 2021
very satisfied
Customer 454099, May 22nd, 2020
I fail the first summation but them got an A. thanks
Customer 453877, January 7th, 2021
Customer reviews in total
Current satisfaction rate
3 pages
Average paper length
Customers referred by a friend
15% OFF your first order
Use a coupon FIRST15 and enjoy expert help with any task at the most affordable price.
Claim my 15% OFF Order in Chat
Live Chat+1(978) 822-0999EmailWhatsApp

Order your essay today and save 20% with the discount code GOLDEN