Avogadros number mole - Study guides, Class notes & Summaries

Chemistry AQA AS Questions 100% Correct Answers Mass number -ANSWER Total number of protons and neutrons. Atomic number -ANSWER Numbers of protons in the nucleus and number of electrons in shells. Negative Ions -ANSWER More electrons than protons. Positive ions -ANSWER More protons than electrons. Relative isotopic mass -ANSWER mass of an atom of an isotope of an element on a scale where an atom of carbon12 is 12. Relative atomic mas...

A level chemistry paper 2 questions and answers latest top score. Silver nitrate+ nitric acid + chloride ions - ANS.White precipitate Silver nitrate+ nitric acid + bromide ions - ANS.Cream precipitate Silver nitrate+ nitric acid + iodide ions - ANS.Yellow precipitate Substances that decolorise bromine water - ANS.Alkenes Electrophiles - ANS.Electron pair acceptors, attracted to electrons e.g H+ NaF and NaCl - ANS.Produces misty fumes wi...

Semmelweis Entrance Exam (N) Questions with Verified Answers 2024/2025 The mole concept Correct Answer: A method that allows the relative number of reactant particles involved in a chemical reaction to be known Avogadro's number Correct Answer: number of representative particles in a mole, 6.02 X 10^23 Basic structures of atoms Correct Answer: There is a nucleus in the center surrounded by an electron cloud or field Quantum numbers Correct Answer: Quantum numbers describe values of...

A-Level Edexcel Mathematics Pure Maths Paper 1 2023 (Summer 2023) How do you make tertiary chloroalkanes? - ANS-Tertiary alcohol + concentrated HCl How do you make bromoalkanes? - ANS-Alcohols + HBr or PBr3 What compound is used to oxidise alcohols? - ANS-Acidified potassium dichromate (can be used to distinguish between types of alcohols) What does a primary alcohol oxidise to? - ANS-first: aldehyde second: carboxylic acid What does a secondary alcohol oxidise to? - ANS-Ketone Why ...

A-Level Edexcel Mathematics Pure Maths Paper 1 2023 (Summer 2023) How do you make tertiary chloroalkanes? - ANS-Tertiary alcohol + concentrated HCl How do you make bromoalkanes? - ANS-Alcohols + HBr or PBr3 What compound is used to oxidise alcohols? - ANS-Acidified potassium dichromate (can be used to distinguish between types of alcohols) What does a primary alcohol oxidise to? - ANS-first: aldehyde second: carboxylic acid What does a secondary alcohol oxidise to? - ANS-Ketone Why ...

What is the charge of a proton? - ANSWERS +1 What is the charge of a neutron? - ANSWERS 0 What is the charge of an electron? - ANSWERS -1 What is the mass of a proton? - ANSWERS 1 What is the mass of a neutron? - ANSWERS 1 What is the mass of an electron? - ANSWERS 1/1800 What is an isotope? - ANSWERS Isotopes of an element are atoms with the same number of protons but different numbers of neutrons. Why do isotopes of an element all have the same chemical properties? - ANSWERS This is...

Chemistry A Level Edexcel 2023 Exam Questions And Complete Solutions Mass spectrometry - ANSWER using lasers to ionise atoms into cations, then measure the abundance and mass using their mass-to-charge ratios Mass to charge ratio - ANSWER the mass of an ion divided by its charge (usually +1 in mass spectrometry) units: m/z relative atomic mass - ANSWER the average mass of an atom of an element relative to 1/12 of an atom of the isotope C-12 relative isotopic mass - ANSW...

Chemistry 1 Final Exam questions and answers latest top score. Matter - correct ing that occupies space and has mass mass - correct amount of matter in an object pure substance - correct nts and compounds that cannot be broken down mixtures - correct nations of two or more substances that can be separated or physically mixed heterogeneous mixture - correct uniform composition ex: trail mix homogeneous mixture - correct rm composition ex: salt water qualit...

atomic # - number of protons mass # - number of protons and neutrons isotopes - atoms with the same atomic number but different mass numbers cation - a positively charged ion anion - a negatively charged ion periods - horizontal rows of the periodic table groups (families) - vertical columns of the periodic table avogadros # - 6.022×10²³ molecular weight (molar mass) - the mass in grams of one mole of a compound theoretical yield - maxi...

Chemistry AS Level AQA Physical Chemistry Revision Key Words Graded A Activation energy The minimum energy that a particle needs in order to react Atom economy mass of desired products/total mass of reactants x 100 Atomic orbital A region of space where there is a high probability of finding an electron Avogadros constant The total number of particles in one mole of a substance or 6.022 x 10^23 Catalyst A substance that alters the rate of a chemical reaction but is not used up in the reactio...