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Algebra Practice Exam
This Practice exam is good for reviewing Algebra Topic. It is Multiple Choices so you can choose the best answer.
£3.75 Preview RemoveChemical Equilibrium-Class Notes
Class Notes-Chemical Equilibrium for Undergraduates
£2.50 Preview RemoveOCR 2024 GCSE Combined Science B Twenty First Century Science J260/04: Combined Science (Foundation Tier) with Marking Scheme Merged
Oxford Cambridge and RSA Friday 7 June 2024 – Afternoon GCSE (9–1) Combined Science B (Twenty First Century Science) J260/04 Combined Science (Foundation Tier) Time allowed: 1 hour 45 minutes You must have: • a ruler (cm/mm) • the Data and Equation Sheet for GCSE (9-1) Combined Science B (inside this document) You can use: • an HBpencil • a scientificor graphical calculator * J F 2 6 0 0 4 * 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 75. • 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 28 pages. ADVICE • Read each question carefully before you start your answer. © OCR 2024 [601/8690/2] OCR is an exempt Charity DC (SL/FC) 342915/3 Turn over 2 1 A student is investigating the rate of reaction between hydrochloric acid (HCl ) and calcium carbonate powder (CaCO3). The equipment used is shown in the diagram. (a) (i) What is the name of this piece of equipment? Tick (✓) one box. Beaker Conical flask Delivery tube Measuring cylinder [1] © OCR 2024
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