Defining chemistry Study guides, Class notes & Summaries

Chemistry definition correct answers Study of structure, properties, transformations of matter Matter correct answers Anything that has mass + takes up space Phases: solid, liquid, gas Condensed phases = solids + liquids Intermolecular Forces (IMF) correct answers = Interactions between molecules/atoms/ions Solution correct answers = Homogenous mixtures of 2+ pure substances In a solution, the solute is dispersed uniformly throughout the solvent - Solute = compound(s) in lesser amount - ...

MARK SCHEME – A-LEVEL CHEMISTRY – 7405/1 – JUNE 2021 9 3 3.14 Organic reaction mechanisms Curly arrows should originate either from a lone pair of electrons or from a bond. The following representations should not gain credit and will be penalised each time within a clip. H3C Br _ : H C . Br H3C . .Br .. _ OH OH For example, the following would score zero marks H H3C C Br HO H When the curly arrow is showing the formation of a bond to an atom, the arrow can go directly to...

Mark schemes are prepared by the Lead Assessment Writer and considered, together with the relevant questions, by a panel of subject teachers. This mark scheme includes any amendments made at the standardisation events which all associates participate in and is the scheme which was used by them in this examination. The standardisation process ensures that the mark scheme covers the students’ responses to questions and that every associate understands and applies it in the same correct way. As ...

1 MODULE 8 PORTAGE 219 ORGANIC CHEMISTRY EXAM | QUESTIONS & ANSWERS (VERIFIED) | LATEST UPDATE | GRADED A+ large molecule made by repetitive linking of smaller units (monomers) Correct Answer: Polymer very large molecule composed of thousands of covalently bonded atoms (ex: polymer) Correct Answer: Macromolecule two ways polymers are made Correct Answer: 1. natural (in nature) 2. synthetic (in lab) natural polymers Correct Answer: rubber, carbs: starch & cellulose, proteins, nu...

Systems that generate, transmit, and distribute power used in processing information, communication, and controls for mechanical, fluid, electrical, and thermo systems are functions of a ___________ engineer. - Answer- mechanical Engineering technologists apply _________ and engineering knowledge with technical skill to assist engineers. - Answer- scientific The ___________ has established rules or standards of conduct in the Engineer Code of Ethics, which governs the profession. - Answer-...

CHM 201: Introduction to Physical Chemistry II COURSEDEVELOPMENT Course Developer DrT. Busari University of Lagos Akoka, Lagos Unit Writer DrT. Busari University of Lagos Akoka, Lagos Course Coordinators Dr F. Peters Ahmadu Bello University Zaria Prof Aiyepeku University of lbadan Ibadan Alkpe National Open University of Nigeria Lagos National Open University of Nigeria National Open University of Nigeria Headquarters National Open University of Nigeria 14/16Ahm...

LCA - Life-cycle Assessment Questions and Answers 2023 The stages of a product life-cycle includes : 1) Material extraction 2) Material Processing 3) Manufacturing 4) Use 5) Retirement During retirement the product can either be re-used, re-made or recycled depending on its quality Re-use -> Retirement back to Use Re-make -> Retirement back to manufacturing Re-cycle -> Retirement to Material Processing When energy and raw materials goes through the stages of produ...

AQA A-LEVEL Chemistry 7405/1 Paper 1 Mark Scheme AS and A-Level Chemistry Mark Scheme Instructions for Examiners 1. General The mark scheme for each question shows: • the marks available for each part of the question • the total marks available for the question • the typical answer or answers which are expected • extra information to help the examiner make his or her judgement and help to delineate what is acceptable or not worthy of credit or, in discursive answers, to give a...

MARK SCHEME – GCSE CHEMISTRY – 8462/1F – JUNE 2021 2 Mark schemes are prepared by the Lead Assessment Writer and considered, together with the relevant questions, by a panel of subject teachers. This mark scheme includes any amendments made at the standardisation events which all associates participate in and is the scheme which was used by them in this examination. The standardisation process ensures that the mark scheme covers the students’ responses to questions and that every assoc...

AS and A-Level Chemistry Mark Scheme Instructions for Examiners 1. General The mark scheme for each question shows: • the marks available for each part of the question • the total marks available for the question • the typical answer or answers which are expected • extra information to help the examiner make his or her judgement and help to delineate what is acceptable or not worthy of credit or, in discursive answers, to give an overview of the area in which a mark or marks may b...