What is crystallisation - Study guides, Class notes & Summaries

what is water of crystallisation? - water molecules that make up part of the crystal structure of a solid define relative isotopic mass - the ass of an atom of an isotope of an element relative to one twelfth the mass of an atom of C-12 why is relative atomic mass written as a decimal? - it is a weighted average mass define molecular formula - the actual number of atoms of each element in a compound define what an orbital is - a region within an atom that can hold up to two electrons of op...

GCSE AQA Chemistry Exam With All Answers what is a compound - ANSWER contains atoms of two or more elements which are chemically combined in fixed proportions how can compounds be separated into their component elements - ANSWER chemical reactions or electrolysis why is the total mass of products equal to the total mass of reactants - ANSWER no atoms are lost or made what is a mixture - ANSWER contains two or more elements or compounds which are not chemically...

Experiment for Diffusion? - correct answer 1) HCl placed at one end of the test tube, ammonia solution at the other. 2) Where they meet, a ring of Ammonium Chloride appears. 3) The diagram shows that the ammonia is closer to the ring, showing that ammonia must have travelled faster, showing it's a lighter gas. Experiment for Dilution? - correct answer 1) Put a coloured substance in a solvent e.g f...

AQA Chemistry Paper 1 Complete Solutions (Verified) C1 Atomic Structure - ANSWER What are atoms? - ANSWER Atoms are the particles that make up everything What is an element? - ANSWER An element is a substance in which all the atoms are the same Where are elements shown? - ANSWER Elements are shown in the Periodic table How many elements are there? - ANSWER There are around 118 elements What is a compound? - ANSWER A compound is a substance that c...

1. What is a mixture? - Ans .Two or more elements not chemically bonded 2. What is the difference between a compound and a mixture? - Ans .Compounds have a fixed composition whereas mixtures do not. Mixtures are not chemically bonded but compounds are. 3. Describe the process of filtration - Ans .Pour the mixture onto the filter paper, the liquid simply passes through the filter paper into the flask. The insoluble solid cannot pass through and so it stays on the paper 4. Describe the pr...

1. what is water of crystallisation? - Ans .water molecules that make up part of the crystal structure of a solid 2. define relative isotopic mass - Ans .the ass of an atom of an isotope of an element relative to one twelfth the mass of an atom of C-12 3. why is relative atomic mass written as a decimal? - Ans .it is a weighted average mass 4. define molecular formula - Ans .the actual number of atoms of each element in a compound 5. define what an orbital is - Ans .a region within an at...

▪ What are all substances made of - Ans .atoms. ▪ What is an atom? - Ans .Smallest part of an element that can exist. ▪ What is an element? - Ans .A substance that only contains one type of atom. ▪ How many elements are there? - Ans .about 100. ▪ Where are elements displayed? - Ans .In the periodic table. ▪ How are the atoms of each element represented? - Ans .different chemical symbols. ▪ What are most substances? - Ans .Compounds. ▪ What is a compound? - Ans .2 or more e...

what is water of crystallisation? - correct answer water molecules that make up part of the crystal structure of a solid define relative isotopic mass - correct answer the ass of an atom of an isotope of an element relative to one twelfth the mass of an atom of C-12 why is relative atomic mass written as a decimal? - correct answer it is a weighted average mass define molecular fo...

AQA GCSE Chemistry Paper 1 2023 Exam Questions With Complete Solutions What is an atom? - ANSWER Smallest part of an element that can exist What is an element? - ANSWER A substance made up of one type of atom How are elements represented? - ANSWER Using symbols, in the periodic table Approximately how many elements are there? - ANSWER 100 What is a compound? - ANSWER A substance made up of two or more elements chemically c...

State the typical values for the Young's modulus of Mild Steel, Concrete, Timber and Masonry If a beam had a second moment of area (I), and was spanning a distance (L) which material property would directly influence how much it would deflect under a constant load (F)? Youngs Modulus (E) State which materials are not affected by creep and why? Masonry, generally not significant Steel, only at high temperatures State which materials are affected by creep? Timber Concr...