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Osmosis and Diffusion
Detailed explanation of osmosis and diffusion lab for AP Biology (or college biology). Experiment with sugar cubes. All materials included and detailed procedure. Acquired grade: 100%.
£12.50 Preview RemoveTitration procedure
A detailed method of how to conduct a titration- including extra tips and explanations of how to make your results as accurate and precise as possible
£2.00 Preview RemoveChemical Reactions and Equations
Chemical equations in chemistry are used as symbolic representations of chemical reactions in which the reactants and the products are written in terms of their respective chemical formulae. The chemical equations also consist of symbols that represent factors such as the direction of the reaction and the physical states of the reacting entities.
£0.50 Preview RemoveThe Nature of Liquids and Solids (13.2-13.3)
Taken from the textbook Introductory Chemistry: A Foundation ISBN-13: 978-1439049402
£5.00 Preview RemoveEukaryotic Transcription
Essay on the mechanism of transcription in eukaryotic organisms.
£1.97 Preview RemoveOrganic chemistry
All the reactions of Hydrocarbons (alkanes, alkenes, alkynes) for senior secondary level and entrance exams, neatly written.
£0.50 Preview RemoveApplications of Macrocyclic and Supramolecular Chemistry
3rd Year University of Manchester Notes on Macrocyclic and Supramolecular Chemistry Topics Included: 1. Rotaxanes as Molecular Machines 2. Crown Ethers as Phase Transfer Agents 3. Molecular Sensors
£1.50 Preview RemoveOCR 2024 GCSE Chemistry B (Twenty First Century Science) J258/04 Depth in Chemistry (Higher Tier) With Marking Scheme Merged
Oxford Cambridge and RSA Tuesday 11 June 2024 – Morning GCSE (9–1) Chemistry B (Twenty First Century Science) J258/04 Depth in Chemistry (Higher Tier) Time allowed: 1 hour 45 minutes You must have: H • a ruler (cm/mm) • the Data Sheet for GCSE (9–1) Chemistry B (inside this document) You can use: • a scientific or graphical calculator • an HB pencil Please write clearly in black ink. Do not write in the barcodes. Centre number First name(s) Last name INSTRUCTIONS Candidate number • Use black ink. You can use an HB pencil, but only for graphs and diagrams. • Write your answer to each question in the space provided. If you need extra space use the lined pages at the end of this booklet. The question numbers must be clearly shown. • Answer all the questions. • Where appropriate, your answer should be supported with working. Marks might be given for using a correct method, even if your answer is wrong. INFORMATION • The total mark for this paper is 90. • The marks for each question are shown in brackets [ ]. • Quality of extended response will be assessed in questions marked with an asterisk (*). • This document has 32 pages. ADVICE • Read each question carefully before you start your answer. 2 1 Millions of tonnes of carbon dioxide (CO2) are added to the air in the UK every year. Carbon dioxide is produced when fossil fuels are burned in power stations to generate electricity. (a) Schemes are being developed to remove carbon dioxide from power station waste gases. These schemes add to the cost of electricity. Explain why it is important to remove carbon dioxide, despite the cost. Use ideas of risk and benefit. .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... ..................................................................................................................................................... [3] (b) The UK government says that the mass of carbon dioxide added to the air during the year 2020 decreased by 400 million tonnes compared to 1990. This is a decrease of 49%. Calculate the mass of carbon dioxide added to the air during 1990. Use the formula: percentage decrease = decrease in mass × 100 mass added to the air during 1990 Mass added to the air during 1990 = .................................. million tonnes [3] © OCR 2024
£5.00 Preview RemoveCardiopulmonary - Multisystem Impairments
I made a CMap of all the multisystem impairments that can occur in the body if you follow the arrows you will also see their side effects.
£5.00 Preview RemoveIntroduction to Chemistry
Beginner-friendly summary of all things that include Chemistry.
£2.50 Preview RemoveThe Solid State
The correlation between structure and properties helps in discovering new solid materials with desired properties like …… high temperature superconductors, magnetic materials, biodegradable polymers for packaging, bio-compliant solids for surgical implants, etc.
£1.50 Preview RemoveIonisation energy and Orbitals
This topic covers Ionisation energy and the factors of it. Furthermore, Orbitals are talked about in this chapter.
£1.50 Preview RemoveGCSE Physics 2.8 - Half-life
These are concise, exam-focused notes made using the WJEC specification and BBC Bitesize. (I achieved an A*.) This is one of nine topics in the unit.
£0.89 Preview RemoveAP Biology 1-page Water Molecule Report
AP Biology One Page Report on the water molecule (H2O) Detailed descriptions on what water is made up of, its uses, and how extremely important it is to plants, animals, and the environment
£3.75 Preview RemoveBTEC Applied Science Unit 14 Assignment 4
Unit 14: Energy Changes, Sources And Applications – Assignment 4 Electrical Energy Sources Task 1 Explain the differences between primary cells and secondary cells. You should describe the simple cell, the leclanche dry cell, the lead acid cell, zinc-air fuel cells and solar cells, covering differences in how they work and their uses. This provides evidence for P4 Task 2 Use the internet and/or catalogues to research the merits and limitations of two primary and two secondary cells. You must include capacity and behaviour under load, ampere-hours/milliampere-hours, disposal hazards and industrial applications for each of your cells This provides evidence for M4 Task 3 Evaluate the use of primary and secondary cells for the following portable devices a small DAB radio a torch a mobile phone This provides evidence for D4 Exam board is Pearson ALL ASSIGNMENTS I HAVE UPLOADED ARE DISTINCTION GRADED.
£5.63 Preview RemoveOCR 2024 GCSE Chemistry B (Twenty First Century Science) J258/03 Breadth in Chemistry (Higher Tier) With Marking Scheme Merged
Friday 17 May 2024 – Morning GCSE (9−1) Chemistry B (Twenty First Century Science) J258/03 Breadth in Chemistry (Higher Tier) Time allowed: 1 hour 45 minutes You must have: H • a ruler (cm/mm) • the Data Sheet for GCSE (9–1) Chemistry B (inside this document) You can use: • an HB pencil • a scientific or graphical calculator * J 2 5 8 0 3 * Please write clearly in black ink. Do not write in the barcodes. Centre number First name(s) Last name INSTRUCTIONS Candidate number • Use black ink. You can use an HB pencil, but only for graphs and diagrams. • Write your answer to each question in the space provided. If you need extra space use the lined pages at the end of this booklet. The question numbers must be clearly shown. • Answer all the questions. • Where appropriate, your answer should be supported with working. Marks might be given for using a correct method, even if your answer is wrong. INFORMATION • The total mark for this paper is 90. • The marks for each question are shown in brackets [ ]. • This document has 24 pages. ADVICE • Read each question carefully before you start your answer. 2 1 Fertilisers are used to increase the growth of plants. They are added to soil to provide essential plant nutrient elements. (a) Nitrogen is one essential plant nutrient element. Name two other essential plant nutrient elements. 1 ....................................................................................................................................................... 2 ....................................................................................................................................................... [2] (b) (i) State one disadvantage of the over-use of synthetic fertilisers. .......................................................................................................................................................... ..................................................................................................................................................... [1] (ii) Suggest why farmers still use synthetic fertilisers despite their disadvantages. .......................................................................................................................................................... ..................................................................................................................................................... [1] © OCR 2024 3 (c) An example of a synthetic fertiliser is ammonium nitrate, NH4NO3. Ammonium nitrate is produced when ammonium hydroxide, NH4OH, reacts with nitric acid, HNO3. NH4OH(aq) + HNO3(aq) NH4NO3(aq) + H2O(l) The relative formula masses for the reactants and products are shown in the table. NH4OH HNO3 NH4NO3 H2O Relative formula mass 35.0 63.0 80.0 18.0 Calculate the atom economy for the formation of NH4NO3. Use the equation: atom economy = mass of atoms in desired product × 100% total mass of atoms in reactants
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