Chemistry > A-Level Question Paper > OCR A LEVEL JUNE 2022 CHEMISTRY A PAPER 3 QUESTION PAPER (All)
A Level Chemistry A H432/03 Unified chemistryThese questions are from different areas of chemistry. (a) Ammonia, NH3, and ammonium nitrate, NH4NO3, are compounds of nitrogen. (i) The boiling point ... of NH3 is –33 °C. The boiling point of NH4NO3 is 210 °C. Explain why there is a large difference in boiling points.Two students discuss the oxidation numbers in ammonium nitrate, NH4NO3. One student claims that the two nitrogen atoms have the same oxidation number. The other student disagrees and claims that the nitrogen atoms have different oxidation numbers. Explain with reasons which student is correct.Brass is an alloy of copper and zinc. The mass spectrum of a sample of brass is shown below.The peaks at m/z = 63 and m/z = 65 are from the 63 Cu and 65 Cu isotopes of copper. The remaining four peaks are from isotopes of zinc. (i) What are the percentage compositions of copper and zinc in the brass sample?The structure of an organic compound is shown below. The protons are in four different environments, which are labelled 1–4.Glycine, H2NCH2COOH, is an α-amino acid. (i) Glycine reacts with NaOH to form the salt H2NCH2COONa. Glycine reacts with HCl to form the salt HOOCCH2NH3Cl. The salts have different H–N–H bond angles. State the different H–N–H bond angles and explain why they are different. [Show More]
Last updated: 2 years ago
Preview 1 out of 34 pages
Buy this document to get the full access instantly
Instant Download Access after purchase
Buy NowInstant download
We Accept:
Can't find what you want? Try our AI powered Search
Connected school, study & course
About the document
Uploaded On
Oct 11, 2022
Number of pages
34
Written in
This document has been written for:
Uploaded
Oct 11, 2022
Downloads
0
Views
116
In Scholarfriends, a student can earn by offering help to other student. Students can help other students with materials by upploading their notes and earn money.
We're available through e-mail, Twitter, Facebook, and live chat.
FAQ
Questions? Leave a message!
Copyright © Scholarfriends · High quality services·