of Education Advanced Subsidiary Level and Advanced Level CHEMISTRY 9701/11 Paper 1 Multiple Choice May/June 2013 1 hour Additional Materials: Multiple Choice Answer Sheet Soft clean eraser Soft pencil (type B or HB is recommended) Data Booklet READ THESE INSTRUCTIONS FIRST Write in soft pencil.....
Cambridge International Examinations Cambridge International Advanced Subsidiary and Advanced Level CHEMISTRY 9701/13 Paper 1 Multiple Choice May/June 2016 1 hour Additional Materials: Multiple Choice Answer Sheet * Soft clean eraser 5 Soft pencil (type B or HB is recommended) 7 6 Data Booklet 1 6...
this paper. Answer all questions. For each question there are four possible answers A, B, C and D. Choose the one you consider correct and record your choice in soft pencil on the separate Answer Sheet. Read the instructions on the Answer Sheet very carefully. Each correct answer will ...
acyl group- a functional group with the formula RCO- where R is bound to carbon via a single bond. adsorption- the adhesion of a chemical species onto a surface adulterant- a chemical that acts as a contaminant in the context of another substance's purity. aether- a medium believed to ...
To address the energy crisis and alleviate the rising level of CO2 in the atmosphere, various CO2 capture and utilization (CCU) technologies have been developed. The use of electro-enzyme coupling systems is a promis-ing strategy for the sustainable production of fuels, chemicals and materials usi...
This page describes the Chemistry Academic Word List (CAWL), giving information on what the CAWL is, details about how it was developed, information on text coverage of the CAWL, mentions some problems with the published list, as well as giving a complete list of words in the CAWL. To exp...
In the periodic table, Neodymium is the 60th element with a lustrous and a shiny yellow look with symbol Nd. Learn more about Neodymium facts, its properties, and uses.
Dogan, A., D. Kempińska-Kupczyk, P. Kubica and A. Kot-Wasik (2020). Analysis of chiral pharmaceutical residues in influent and effluent samples at racemic and enantiomeric level using liquid chromatography-tandem mass spectrometry. Microchemical Journal 159: 105517. https://doi.org/10.1016/...
Attributed to the synergistic effect of dual capacitive mechanism, porous carbon sheet (PCS) cathode shows a reversible specific capacity of 53.6 mAh g-1 even at a high current density of 50 A g-1. Significantly, the quasi-solid-state LIC manifests state-of-the-art electrochemical performances...
Dinitrogen conversion to ammonia is of great biological and industrial relevance, but modelling this process on a molecular level is challenging. Now, a biomimetic model offers new insights into the functionalization of a nitrido ligand to form NH3using either H2or H+/e–. ...