- Study guides, Class notes & Summaries

What is an equation for number of moles involving mass and Mr? - ANSWER number of moles = mass / Mr What is an equation for number of moles involving concentration and volume? - ANSWER number of moles = concentration x volume

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23 pages

Written in 2024/2025

Grade A+

KenAli

As-Level Aqa Chemistry Questions And Verified Answers Solutions Latest Updas-Level Aqa Chemistry Questions And Verified Answers Solutions Latest Update 20242025 Graded A&Plus;Ate 20242025 Graded A&Plus;

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18 pages

Written in 2023/2024

Grade A+

Examprofessor1

What is an equation for number of particles involving number of moles and Avogadros constant? - CorreCt Answers -number of particles = number of moles x Avogadros constant What is the Ideal Gas Equation? - CorreCt Answers -PV = nRT What is P in regards to the Ideal Gas Equation and what is its units? - CorreCt Answers -P = nRT / V pressure and is measured in Pa or Pascals What is V in regards to the Ideal Gas Equation and what is its units? - CorreCt Answers -V = nRT / P volume and is m...

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29 pages

Written in 2024/2025

Grade A+

munenebeth20

AS-level AQA Chemistry EXAMS BUNDLE with Questions & 100% Correct Answers

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6 items

KenAli

hat is carbon dating? - ANSWER The process of using the radioactive isotopes in carbon-14. All living things contain carbon-14. Carbon-14 decays slowly in a living organism, and the amount lost is continually replenished as long as the organism takes in air or food. Once the organism dies, however, it cannot absorb carbon-14. This means that the amount of the radiocarbon in its tissues steadily decreases.

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46 pages

Written in 2024/2025

Grade A+

KenAli

Boyle's law - ANSWER The volume of a fixed mass of gas (at a constant temperature) is inversely proportional to its pressure Burette - ANSWER Labatory apparatus used to add precise volumes of liquid during a titration Carbocation - ANSWER Ion with a positively charged carbon atom

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19 pages

Written in 2024/2025

Grade A+

KenAli

AS-level AQA Chemistry Exam Prep Questions with Complete Solutions Latest Update 2024 Linear molecule - ANSWER 2 bonds 180 degree angles 2D e.g: CO2 Trigonal planar molecule - ANSWER 3 bonds 120 degree angles 2D e.g: BF3 Tetrahedral molecule - ANSWER 4 bonds 109.5 degree angles 3D e.g: CH4 Trigonal bipyramid molecule - ANSWER 5 bonds 120 degree and 90 degree angles 3D e.g.: PCl5

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14 pages

Written in 2024/2025

Grade A+

KenAli

Polarity - ANSWER The unequal sharing of the electrons between atoms in a covalent bond Polar - ANSWER Describes a molecule where the charge is not equally distributed, one end is more positive, the other more negative Dipole-dipole forces - ANSWER An intermolecular force between two molecules with permanent dipoles

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25 pages

Written in 2024/2025

Grade A+

KenAli

Define the term 'Alkenes' - ANSWER An unsaturated hydrocarbon with the general formula CnH2n, containing at least one carbon-carbon double bond How can we test for the presence of a C=C double bond? - ANSWER Add bromine water (an orange solution) to the unknown solution. If a C=C double bond is present then the solution will decolourise (turn colourless).

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25 pages

Written in 2024/2025

Grade A+

KenAli

Who described atoms as solid spheres that make up different elements and when? - ANSWER John Dalton in the 19th century Who suggested that atoms of a particular element had the same mass and atoms of different elements had different masses and when? - ANSWER John Dalton in 1803 Who discovered the electron and when? - ANSWER JJ Thomson, 1897 discovered electrons proving atoms weren't indivisible or solid

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45 pages

Written in 2023/2024

Grade A+

QUINTER

Nucleons - ANSWER Protons and neutrons Electrons (location) - ANSWER Surrounding the nucleus Relative mass of an electron - ANSWER 1/1840 Strong nuclear force - ANSWER The way protons and neutrons are held together in the nucleus Electrostatic forces - ANSWER The attraction between protons and electrons that hold them together in the atom

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25 pages

Written in 2023/2024

Grade A+

QUINTER