Quantitative chemistry gcse questions pdf

 

Atom economy studies the amount of reactants that get turned into useful products. Banner 1 AQA GCSE Paper 1: Complete Revision Summary Quantitative Chemistry Banner 2 Quantitative Chemistry a) Calculating Formulas Mass b) Calculating Moles from GCSE CHEMISTRY Topic Paper: 3 Quantitative chemistry Part 1 Time allowed: 45 minutes Materials For this paper you must have: the Periodic Table/Data Sheet, provided as an insert (enclosed) a ruler with millimetre measurements a calculator, which you are expected to use where appropriate. So you need 2. I have finally found the notes that helped me get a 9 in AQA GCSE CHEMISTRY, and I have Atom Economy. Gold Standard Education.  These worksheets help your students logically Sep 18, 2021 · As promised, here is the whole of Unit 3: Quantitative Chemistry for the New AQA Combined Science Trilogy. Paper. Sign Up Now. Question 1: Define the terms solute and solvent. A student prepared 1. Measure out 25. 1 Qualitative Analysis: Tests for Ions. One set of higher and one set of foundation questions also include Chemistry Only questions. 1 Sodium carbonate, Na2CO3, is used as a water softener. These elements are non-metals that are poisonous. It illustrates what percentage of the mass of reactants become Question Paper 1 Level GCSE (9 -1) Subject Chemistry Exam Board AQA Topic 4. The limiting reagent is the reactant which is not present in excess in a reaction. Student friendly model answers written by experienced teachers & examiners. Here, you'll find an array of revision notes, topic questions, fully explained model answers, past exam papers and more, meticulously organized Mark Schemes. Calculate the percentage yield if the theoretical yield is 2. docx, 14. 6 / 2. Apr 24, 2024 · This bundle of resources contains 8 whole lessons which meet all learning outcomes for the higher tier, separate science modules within the ‘Quantitative Chemistry’ unit for the NEW AQA Chemistry Specification. To do this, information given in the question is used to find the amount in moles of the substances being considered. Atomic Structure & the Periodic Table. r) Mass changes when a reactant or product is a gas. Topics include Percentages, Balancing Equations and Environmental Impacts with a variety of questions and challenging calculations. 2. Get a hint. Reaction CuO + C ⎯ → Cu + CO Mole ratio Mr (g mol-1) Mass (g) Amount (mol) 2. With revision explainer videos & notes, practice questions, topic tests and full mock exams for each topic on every course, it’s easy to Learn and Revise with the MME Learning Portal. Get started by selecting your qualification level, and dive into everything you'll need to make the AQA GCSE QUANTITATIVE CHEMISTRY 1 > o E o One mole of H20 = 18B (1 + 1 + 16) One mole of MB = 24B No atoms are lost or made during a chemical reaction o Subscript Greater volume = lower concentration. GCSE; CCEA; Quantitative chemistry - (CCEA) Limiting reactants - (higher tier) Chemists use relative atomic masses and relative formula masses to carry out mole calculations. What mass of oxygen is needed to make 20g of MgO? This is Chemistry (separate science) only material – this means you will only need to revise this if you are sitting the triple award separate science Biology paper (8462). The one that is remaining is the excess reactant. Exam questions are included throughout the texts. Feb 17, 2021 · Revising quantitative chemistry for your chemistry GCSE will help you familiarise yourself with key concepts and reinforce your existing knowledge. Concentrations of Solutions Example Questions. Model Answers. You will need 5 x 36. 99. Bitesize GCSE Chemistry. Matter cannot be created or destroyed, The mass of the products is equal to that of the reactants. Topics covered include particles, chemical reactions, predicting reactions, global challenges in chemistry and much, much more. 6 g. Use our free revision notes, practice questions, and past papers to ace your exams. This is Higher Tier and Chemistry (separate science) only material – this means you will only need to revise this if you are sitting the higher tier Biology paper (8462). All halogens have similar reactions as they each have seven electrons in their outermost shell. This is calculated from the mass number and relative abundances of all the isotopes of a particular element. These videos are fully up to date with the AQA spec for 2024. With Save My Exams, your revision resources are created by experienced educators and examiners who actually mark GCSE exams, so you’ll know exactly what to revise and how to answer questions for maximum marks. Qualitative Analysis 1. Result: Pure water boils at 100°C. Percentage yield of copper (II)sulfate = (1. 5x2 = 5 moles of HCl. GCSE Chemistry (Single Science) Quantitative chemistry learning resources for adults, children, parents and teachers. GCSE AQA Chemistry Notes Back to GCSE Revision. Bonding, Structure, and the Properties of Matter. 2 Bonding, Structure and the Properties of Matter. Question types will include multiple choice, structured, mathematical and practical questions. Questions organised by topic & past papers. Questions and model answers for the Edexcel GCSE Chemistry syllabus, written by the Chemistry experts at Save My Exams. 4 Chemical Measurements for the AQA GCSE Chemistry syllabus, written by the 4-3 Quantitative chemistry – Chemistry. AQA GCSE Chemistry Predicted Papers 2024. Each topic contains answers so that you can check that what you have written is correct. You can also use it in conjunction with your teaching, so as to remove the need to print lots of different worksheets. So 60g of Mg is 60/24 = 2. How many moles of oxygen are required for this combustion reaction? ☐. 3). This is a SLOP workbook for quantitative chemistry unit 3 for AQA combined science trilogy. To help you revise for your GCSE Chemistry Exams. This free, online revision course includes everything you need to know for your OCR Combined Science Gateway (A) GCSE Chemistry exams. uk Page 1 Chem Measure; Con Mass + Quant Interp. The units of the rate of reaction would therefore be g/s or cm 3 /s or dm 3 Aug 25, 2022 · A revision homework or class worksheet with answers that covers Percentage Yield in C3 GCSE (Triple) Chemistry. You'll get a jumpstart on planning when you integrate a bit of Beyond today. A student was asked to make copper(II) oxide, CuO, from copper(II) sulfate, CuSO 4 using the following method. 450 g. Please see below Chemistry support materials from PIXL. AQA_Chemistry_Atomic structure and the periodic table_KnowIT_GCSE. There are six sets of questions in the pack, three for higher tier students and three for foundation tier students. 00\text { g} of magnesium hydroxide and 25\text { dm}^3 of water. Below are some useful videos and a knowledge organiser for revising the C3 Chemistry topic on Quantitative Chemistry.  Filled with in-depth questions that test and reinforce your students’ chemistry studies, this resource is a great way to enhance GCSE Chemistry learning covering the Quantitative Chemistry topic. Each paper has been designed by Chemistry experts, tutors and examiners, to ensure they are as accurate as possible in replicating the real exams. I have also included a scheme of work for the unit, with blooms taxonomy learning objectives paired with the new GCSE grades. 3 Polymers. AQA Knowledge Mat GCSE - Organic chemistry 2. AS and A2 Level Chemistry worksheets, past papers and practice papers for Edexcel, AQA and OCR. Discover curriculum-aligned study sets and learning activities for the exam board specifications below, or explore resources by partner. 1 / 57. (a) A student has solutions of three compounds, X, Y and Z. Complete the table by writing the relative mass of a neutron and an electron. Part of Combined Science Quantitative chemistry Save to My Bitesize Remove from My Bitesize Quantitative Chemistry is a key topic for the AQA GCSE Chemistry syllabus. 4 This interactive, editable GCSE Quantitative Chemistry worksheet is the perfect way to stimulate learning on the Quantitative Chemistry topic. AQA GCSE Chemistry (Separate Science) Unit 3: Quantitative Chemistry Concentration of Solutions Concentration is a measure of the amount of a substance in a volume of liquid. Learn how to calculate the masses, moles, and concentrations of substances involved in chemical reactions. 10. Test 1: Determine its boiling point. 9 g of copper (II) oxide to copper by the following reaction. Relative formula mass (M. C1 - Atomic Structure & the Periodic Table. Hydrocarbons 3. 0) x 100. Part of Chemistry 14 hours ago · Use Quizlet for GCSE Chemistry to learn about everything from the periodic table to atomic structures. uk Page 1 Further Analysis and Quantitative Chemistry Question Paper Level GCSE Subject Chemistry Exam Board AQA Unit C3 Topic Further Analysis and Quantitative Chemistry Difficulty Level Silver Level Booklet Question Paper Time Allowed: 90 minutes Copper (II) sulfate may be prepared by the reaction of dilute sulfuric acid on copper (II) oxide. Relative formula Mass. Sample exam questions - quantitative chemistry - AQA. uk Page 1 Quantitative Chemistry Question Paper Level GCSE Subject Chemistry Exam Board AQA Unit C2 Topic Quantitative Chemistry Difficulty Level Bronze Level Booklet Question Paper Time Allowed: 57 minutes Score: /57 Percentage: /100 For more awesome GCSE and A level resources, visit us at www. You could use this resource for homework or as a class activity. Amounts of substances in equations. GCSE; AQA; Sample exam questions - quantitative chemistry - AQA Multiple choice questions. These are revision mats full of questions for each topic. Any errors or mistakes please let us know. This interactive GCSE Quantitative Chemistry worksheet is the perfect way to stimulate learning on the Quantitative Chemistry topic. eq Question Paper 1 Level GCSE (9-1) Subject Chemistry Exam Board AQA Topic 4. GCSE Chemistry Paper 1. FAQ! Test 2: Determine the melting point of ice made by freezing the water sample. Qualitative Analysis 3. File previews. Revision notes on 3. Chemistry Paper 1. 1. Bonds, Structure & Properties of Matter. Within each of these 5 sections, there is written content, short quizzes to test your knowledge and AQA past paper questions. This pack follows the AQA specification and covers all the topics in quantitative chemistry. Half equations and ionic equations are specific types of equations for showing some of the fine details going on in chemical reactions. Actual yield of copper (II)sulfate = 1. Halogens are diatomic, meaning they form molecules made of pairs of atoms sharing . Boost your confidence and ace your chemistry exams with PMT. Easy-to-understand homework and revision materials for your GCSE Chemistry (Single Science) AQA '9-1' studies and exams. (Single Science) Quantitative chemistry. Filled with in-depth questions that test and reinforce your students’ chemistry studies, this resource is a great way to enhance GCSE Chemistry learning. 81 MB. This question is about chemical analysis. Also included is an equation sheet AQA Knowledge Mat GCSE - The rate and extent of chemical change. Hydrocarbons 1. C3 - Quantitative Chemistry. 1 1 mark. 1 Global Reserves & Potable Water. Stewart specialises in Chemistry, but has also taught Physics and Environmental Systems and Societies. uk Page 2 Q1. AQA Knowledge Mat GCSE - Chemistry of the atmosphere. In chemistry, there are two ways to measure the concentration of a solution. View PDF List. AQA GCSE (9-1) Chemistry revision resources. Then, the ratio between the substances is identified using the balanced chemical equation. The student records the results of the tests in the table. Q8: 48g of magnesium and 32g of oxygen react to form 80g of magnesium oxide. savemyexams. 41 marks covering as much as possible from the module and in as much depth of possible. Browse past papers, summary notes and exam questions by topic and exam board. Instructions Use black ink or black ball-point pen. So, the concentration of the alkali is 0. 4 Alcohols & Carboxylic Acids. uk Page 1 Quantitative Chemistry Question Paper Level GCSE Subject Chemistry Exam Board AQA Unit C2 Topic Quantitative Chemistry Difficulty Level Silver Level Booklet Question Paper Time Allowed: 156 minutes Score: /156 Percentage: /100 question Step 2: Work out what 1 g of the reactant would give you (how much product you should get) Step 3: Scale up to work out the amount the question asks you for Step 1: The question mentions iron and iron oxide, so: Fe2O3 2Fe (56 x 2) + (16 x 3) = 160 2 x 56 = 112 This means that 160 g of iron oxide, would give you 112 g of iron. Atomic Structure and the Periodic Table; Quantitative Chemistry. 0 This question is about carbonates. An engaging lesson presentation (80 slides) and associated worksheets that uses a combination of exam questions, quick tasks and quiz competitions to help the students to assess their understanding of the topics found within Topic 3 (Quantitative chemistry) of the AQA GCSE Chemistry specification (specification point C4. Get started. (a)€€€€ Carbon atoms have protons, neutrons and electrons. 5g of HCl= 182. 3 Quantitative Chemistry Sub-Topic Chem Measure; Con Mass + Quant Interp. 1a 1 mark. 0. 2 Hydrocarbons. 61 KB. Use the same idea as above: 1 dm 3 of alkali must contain 0. 1. 0 cm 3 of 0. To calculate the Mr of a substance, you have to add up the relative atomic masses of all the Quantitative Chemistry When we do experiments to measure something in Chemistry, we: • Repeat experiments (usually 3 times) to improve the reliability of the results, by calculating an average of our results. 9 MB. 60 . Questions organised by topic with mark schemes for the Edexcel GCSE (9-1) Chemistry course. 1 Simple Model of the Atom. Jul 4, 2019 · OCR Combined Science Gateway (A) GCSE Chemistry. Resource type: Assessment and revision. pdf, 1. Calculate the concentration of this solution in \text {g/dm}^3. They are called half equations, because they represent only half of Separate Chemistry Mats. Test Compound Flame test Feb 22, 2018 · Age range: 14-16. Get 20% off this resource with the discount code EXTRA20: Percentage Yield Home Learning Worksheet GCSE. Once the moles have been determined they can C3 Quantitative Chemistry. 5) so mass of 1 mole of HCl = 36. AQA Knowledge Mat GCSE - Organic chemistry 1. Apr 2, 2019 · pptx, 3. GCSE Chemistry Revision Science section on quantitative chemistry, looking at calculating masses, reacting masses, the conservation of mass, the mole and Titrations. Exam Date. In the presence of an impurity, the boiling point will be greater than 100°C. Give the number of atoms of each type in sodium carbonate. Moles (HT only) Amounts of substances in equations (HT only) Using moles to balance equations (HT only) Limiting reactants Download our entire range of AQA Quantitative Chemistry GCSE Lessons all in one handy bundle. Balanced symbol equation tells us that for every one mole of Mg, you need two moles of HCl to react with it. GCSE CHEMISTRY AQA revision notes-Quantitative Chemistry-Grade 9. Understanding how to approach exam questions helps to boost exam performance. QUANTITATIVE CHEMISTRY 1. Past paper and exam-style questions organised by topic, with student-friendly answers written by teachers and examiners. This is designed to be printed as a booklet on A4 paper and worked through independently by students. Just select your qualification level ( (I)GCSE, A Level, IB) and exam board below, and dive into everything you’ll need to study smarter, not harder. Calculate the mass of carbon you would need to reduce 15. The reagent that is used up first is the limiting reactant, as it limits the duration of the reaction and hence the amount of product that a reaction can produce. 8. ☐. A. co. Jan 1, 2010 · 10. 03125. The MME GCSE Chemistry Predicted papers are a great way to practise for your upcoming exams. 7 moles of alkali. What is included in each pack: Show Question types will include multiple choice, structured, mathematical and practical questions. 85 KB. 3 Quantitative Chemistry. 2 Calculate the relative formula mass (Mr) of sodium carbonate, Na2CO3 Relative atomic masses (Ar): Na = 23; C = 12; O = 16. 3 Using Materials. Answer. Learn an entire GCSE course for maths, English and science on the most comprehensive online learning platform. 5 moles. The eBook IGCSE GCSE Chemistry MCQs Chapter 1-14 PDF includes high school question papers to review practice tests for exams. Physical Tests for Pure Water. € Name of particle Relative mass proton 1 neutron € electron € (2) 7 Brookvale Groby Learning Trust Page 13 of 105 Topic 3: Quantitative chemistry Chemical measurements, conservation of mass and the quantitative interpretation of chemical equations For more awesome GCSE and A level resources, visit us at www. You could be asked questions about the apparatus, methods, safety precautions, results GCSE Combined Science Quantitative chemistry learning resources for adults, children, parents and teachers. EdPlace’s GCSE exam-style questions and practice papers help your child hone their exam-technique and prepare them for anything the exam may throw at them. Did this page help you? Questions and model answers on 3. AQA_Chemistry_Bonding, structure, and the properties of matter QUESTIONS. Along with the percentage yield, atom economy is used to analyse the efficiency of reactions. Chem. Make your way through our clear revision notes, Chemistry past papers, typical exam questions, fully-explained model answers and more, tailored to your Chemistry specification. 0 g. Result: Pure ice melts at 0°C. AQA_Chemistry_Bonding, structure, and the properties of matter_ANSWERS. Bonding, Structure and Properties of Matter and Quantitative Chemistry: AQA GCSE Chemistry Collins Collins GCSE 2016-11 Relative formula mass (Mr): C6H12O6 = 180. All the extra questions you need to take the separate Chemistry GCSE are in the Triple science Topics section. Use Quizlet for AQA GCSE Chemistry to learn about everything from ionic compounds to nanoscience. 14 hours ago · We worked with world-class publishers, partners and our team of Verified Educators to ensure these resources are of the highest quality. Every lesson is covered exactly to the specification with a plethora of worksheets and homeworks. 8 g of the acid in 250 cm 3 of solution. 9. The amount of product obtainable is therefore Chemical equations can be used to calculate the moles or masses of reactants and products. Past paper and exam-style questions, organised by topic. Notes Question by Topic Notes This page contains the detailed and easy notes for AQA GCSE Chemistry Quantitative Chemistry for revision and understanding Quantitative Chemistry. 5. A solution of sulfuric acid, H 2 SO 4, contains 9. 7. 1 Atomic Structure and the Periodic Table. The profit from every pack is reinvested into making Whether you are preparing for A-levels, International A-levels, GCSEs or IGCSEs, you can find comprehensive chemistry revision resources on PMT. OCR 21st Century (B) GCSE Chemistry. Bitesize Combined Science. 3 Quantitative chemistry Sub Topic Chem measure; con mass+quant interp. Q7: Using the following equation and the periodic table, give the mass of each reactant and product. GCSE Chemistry. It also allows you to digest the fundamental ideas of the subject, including stoichiometry and how substances can be quantified in terms of moles. 2 Life Cycle Analysis & Recycling. These are fluorine, chlorine, bromine, iodine and astatine. The product is usually the one that is measured as it is usually easier to measure a product forming than it is a reactant disappearing. Quantitative Chemistry. Subject: Chemistry. End of topic assessment using exam questions for higher tier trilogy science AQA GCSE students in the Quantitative Chemistry module. AQA GCSE Combined Science: Trilogy 8464. Qualitative Analysis 2. GCSE; CCEA; Quantitative chemistry - (CCEA) Test questions Chemists use relative atomic masses and relative formula masses to carry out mole calculations. This Here you’ll find clear revision notes, Chemistry past papers, typical exam questions, fully-explained model answers, and more. The mass of calcium oxide remaining in the crucible is 5. This question is about carbon and gases in the air. The first block of questions covers double science. Most reactions produce more than one product and very often some of them are not useful. Mark scheme provided. Save to Sample exam questions Full coverage of Chemistry revision questions for the current syllabus. Our extensive collection of resources is the perfect tool for students aiming to ace their exams and for teachers seeking reliable resources to support their students' learning journey. Convert the masses in grams to amounts in moles and convert the number of moles to simple whole number ratios. Discover curriculum-aligned study sets and learning activities for the entire AQA Chemistry curriculum below. The symbol for the relative atomic mass is Ar. 5 Energy Changes. The student uses tests to identify the ions in the three compounds. These worksheets help your students logically and systematically revise as they work towards qualifications EdPlace's AQA Single Subject GCSE activities, exam style questions and practice papers covers content from GCSE Biology (8461), GCSE Chemistry (8462) and GCSE Physics (8463) specifications. uk Page 1 Quantitative Chemistry Question Paper Level GCSE Subject Chemistry Exam Board AQA Unit C2 Topic Quantitative Chemistry Difficulty Level Gold Level Booklet Question Paper Time Allowed: 242 minutes Score: /242 Percentage: /100 As a long-standing Head of Science, Stewart brings a wealth of experience to creating Topic Questions and revision materials for Save My Exams. Represent chemical reactions and Stewart has been an enthusiastic GCSE, IGCSE, A Level and IB teacher for more than 30 years in the UK as well as overseas, and has also been an examiner for IB and A Level. Some reactants may give a change in mass but this is because some gas has escaped. eq Difficulty Level Gold Level Booklet Question Paper 1 Download. Question types will include Ar : Mg =24 so mass of 1 mole of Mg = 24g Mr : HCl(1 + 35. This question is about the reactions of copper compounds. 0179 x 1000/29. Hydrocarbons 2. 6 g of dry copper (II)sulfate crystals. docx, 94. The theoretical yield of calcium oxide in this experiment is 5. [2 marks] Question 2: A student prepares a solution of magnesium hydroxide solution using 9. Age range: 14-16. 2 detailed revision posters in this pack. Part of Chemistry (Single Science Sep 18, 2021 · pdf, 1. AQA GCSE. • Repeats also allow us to spot an anomaly: a result that does not fit the pattern of the others. 2 Calculating Mass of Substances for the AQA GCSE Chemistry syllabus, written by the Chemistry experts at Save My Exams. 2 The Periodic Table. O Level Chemistry Quiz Questions and Answers PDF download, free eBook’s sample covers beginner's solved questions, textbook's study notes to practice online tests. CHEMISTRY QUESTIONS GCSE MARK SCHEME This mark scheme is for use in conjunction with the book Chemistry Questions for CCEA GCSE, ISBN: 978 1 78073 189 6 Colourpoint Educational An imprint of Colourpoint Creative Ltd Colourpoint House Jubilee Business Park 21 Jubilee Road Newtownards County Down Northern Ireland BT23 4YH Tel: 028 9182 0505 The elements in group 7 are known as the halogens. 5g. £ 9. You will complete 21 required practical activities if you are studying GCSE combined science: Trilogy. Lessons included: The lessons contain a mix of differentiated activities, progress check and exam questions plus more than one Leverage the knowledge and expertise of40+ examiners and educators. Learn about and revise calculations in chemistry with this BBC Bitesize GCSE Chemistry (AQA) study guide. Mg +. Workbooks Separate Chemistry 2. Quantitative Chemistry Question Paper 1 Level IGCSE Subject Chemistry (4402) Exam Board AQA Unit C2 For more awesome GCSE and A level resources, visit us at www Nov 7, 2023 · Share your videos with friends, family, and the world Chemistry. Make sure you're ready to teach the AQA Quantitative Chemistry GCSE specification in advance by downloading everything you need right here. Half equations are used to show what happens to the electrons in reactions where atoms, molecules or ions are gaining or losing electrons. AQA Quantitative Chemistry Higher Assessment Pack - Our assessment pack mimics a real AQA exam, helping you prepare your students for the real thing. CaCO3(s) → CaO(s) + CO2(g) A second sample of calcium carbonate is strongly heated in a crucible until there is no further loss in mass. Stuck? View related notes. Mark schemes included. Revision notes for the AQA GCSE Chemistry syllabus, written by the Chemistry experts at Save My Exams. Polymers. 4 Chemical Changes. Course-specific and 100% exam-aligned. Conservation of mass and balanced symbol equations. Part of Combined Science Quantitative chemistry Save to My Bitesize Remove from My Bitesize We're on a mission to take the guesswork out of Chemistry revision. 0625 moles of methane is burnt in air according to the following equation: CH 4 + 2O 2 → CO 2 + 2H 2 O. 3. AQA_Chemistry_Atomic structure and the periodic table_ThinkIT_GCSE. The higher the concentration, the more particles of a substance are present in the solution. Past Paper Questions by Topic. C2 - Bonding Structure & the Properties of Matter. Mass of the products equals the mass of the reactants. 4 Haber Process & NPK Fertilisers. As a long-standing Head of Science, Stewart brings a wealth of experience to creating Topic Questions and revision materials for Save My Exams. Calculate the percentage yield of calcium oxide. Click the card to flip 👆. eq For more awesome GCSE and A level resources, visit us at www. AQA Knowledge Mat GCSE - Chemical analysis. All questions are set primarily by topic, not by paper. Law of Conservation of Mass. Progress tracking across 35+ topics & 2155+ questions, sorted by difficulty. Meet all our experts. Iron will react with chlorine to form iron (III) chloride. 43 MB. You could be asked questions about the apparatus, methods, safety precautions, results Topic Questions. The symbol for the relative formula mass is Mr and it refers to the total mass of the molecule. Chemistry Lawrie Ryan 2002 This is a Foundation GCSE Chemistry course written to cover all the major specifications, preparing students for Single and Double Award Chemistry. 600 g. QUANTITATIVE CHEMISTRY- Single Sciences. For more awesome GCSE and A level resources, visit us at www. 5 Bulk & Surface Properties of Matter Including Nanoparticles. 500 mol / dm 3 copper(II) sulfate solution Free A-Level Chemistry revision materials. Content. A set of multiple-choice questions for AQA GCSE Quantitative Chemistry that help test your students on this topic in a quick and comprehensive manner. The knowledge organisers will help you to complete these. What is the concentration in mol/dm 3? Relative atomic masses ( Ar ): H = 1 S = 32 O= 16. The quantity to be measured depends on the reaction and may be in grams for mass or cm 3 or dm 3 for volume if the product is a gas. kn wq gb up uh dw ei pb ji of