Water of crystallisation - Study guides, Revision notes & Summaries

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 food colouring in water. 2) Over ...

What is Avagadro's constant? Correct Answer 6.02 x 10^23 number of particles in a mol Define empirical formula Correct Answer The simplest whole number ratio of atoms of each element present in a compound Define molecular formula Correct Answer The number and type of atoms of each element in a molecule What is water of crystallisation? Correct Answer Water molecules that are bonded into a crystalline structure of a compound What is the ideal gas equation? What are the units of each ...

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...

Mixture - Answer made up of two or more substances that are not chemically combined 3 properties of compounds - Answer -fixed composition, the same ratio of each element -only chemical reactions can separate elements -chemical bonds between atoms 3 properties of mixtures - Answer -no fixed composition, the amount of the different substances can change -can be separated easily, using the properties of the different substances -no chemical bonds between atoms/compound in mixtur...

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...

A LEVEL CHEMISTRY WITH VERIFIED QUESTIONS AND ANSWERS Weak acid - an acid that is only slightly ionised/dissociated in aqueous solution Oxidation - loss of electrons Reduction - gain of electrons Ionic bonding - The electrostatic attraction between oppositely charged ions Covalent bonds - sharing of a pair of electrons Electronegativity - the ability of an atom to attract the electrons in a covalent bond Relative atomic mass - The weighted mean mass of an atom of an element ...

▪ ISOTOPES - Ans .ATOMS OF THE SAME ELEMENT WITH DIFFERENT NUMBERS OF NEUTRONS ▪ ATOMIC (PROTON) NUMBER - Ans .NUMBER OF PROTONS IN THE NUCLEUS ▪ MASS (NUCLEON) NUMBER - Ans .NUMBER OF PARTICLES (PROTONS & NEUTRONS) IN THE NUCLEUS ▪ ION - Ans .A POSITIVELY OR NEGATIVELY CHARGED ATOM OR (COVALENTLY BONDED) GROUP OF ATOMS ▪ RELATIVE ISOTOPIC MASS - Ans .THE MASS OF AN ISOTOPE COMPARED WITH ON TWELTH OF THE MASS OF AN ATOM OFCARBON 12 ▪ RELATIVE ATOMIC MASS - Ans .THE WEIGHTE...

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 formula - correct answer the actual number of atoms of each element in a compound define what an orbital is...

GCSE EDEXCEL TRIPLE SCIENCE CHEMISTRY PAPER 2 2024 QUESTION PAPER WITH QUESTIONS AND CORRCT ANSWERS GRADED A+ What is in the nucleus? - CORRECT ANSWER-Protons and neutrons What is relative atomic mass? - CORRECT ANSWER-Relative atomic mass is an average mass taking into account the different masses and abundances of all the isotopes that make up the element How do you calculate the relative atomic mass? - CORRECT ANSWER-Sum of (isotope abundance x isotope mass number) / sum of abundan...

▪ Relative atomic mass - Ans .The weighted mean mass of an atom of an element compared with one-twelfth of the mass of an atom of carbon-12. ▪ Relative isotopic mass - Ans .The mass of an atom of an isotope compared with one-twelfth of the mass of an atom of carbon-12. ▪ empirical formula - Ans .The simplest whole number ratio of atoms of each element present in a compound ▪ molecular formula - Ans .A chemical formula that shows the number and kinds of atoms in a molecule, but...