Avogadros number - Study guides, Class notes & Summaries

AQA 2024 AS CHEMISTRY 7404/2 Paper 2 Organic and Physical Chemistry Question Paper & Mark scheme + Insert (Merged) June 2024 Updated Version Silver nitrate+ nitric acid + chloride ions - Correct Answer>>White precipitate Silver nitrate+ nitric acid + bromide ions - Correct Answer>>Cream precipitate Silver nitrate+ nitric acid + iodide ions - Correct Answer>>Yellow precipitate Substances that decolourised bromine water - Correct Answer>>Alkenes Electrophiles -...

General Chemistry ACS Final Exam 89 Questions with Verified Answers Protons - CORRECT ANSWER defines the element; positive charge; equal to the atomic number Neutrons - CORRECT ANSWER equal to mass number-number of protons; neutral charge Electrons - CORRECT ANSWER negative charge; dependent on the charge of the atom Cations - CORRECT ANSWER Positively charged ions Anions - CORRECT ANSWER Negatively charged ions Isotopes - CORRECT ANSWER when the number of neutrons varies but i...

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AS-level AQA Chemistry questions and answers 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 t...

Which is cleaner: the combustion of gasoline or the combustion of propane? correct answers the combustion of propane is cleaner Why can clouds of condensed water vapor can be seen coming from the exhaust of cars on cold days? correct answers Water vapor is produced as gasoline combusts. A reaction that absorbs energy is called what? correct answers Endothermic What is the difference between the coefficient and the subscript numbers used in a balanced chemical equation? correct answers C...

General Chemistry Final Exam Questions Correctly Answered. Atomic Number vs mass number vs. atomic mass vs. atomic weight vs. molecular weight - CORRECT ANSWER atomic number-Z=protons mass number- A=sum of protons and neutrons -atomic mass: mass number ^^ -atomic weight: weighted average of naturally occurring isotopes (12.011) -molecular weight: add up the atomic weights of each element in a compound subatomic charges aka charge of an electron - CORRECT ANSWER e= 1.6 x 10^-19 1 ele...

AS-level AQA Chemistry questions and answers 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 t...

AS-level AQA Chemistry questions and answers 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 t...

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Mass spectrometry using lasers to ionise atoms into cations, then measure the abundance and mass using their mass-tocharge ratios Mass to charge ratio the mass of an ion divided by its charge (usually +1 in mass spectrometry) units: m/z relative atomic mass the average mass of an atom of an element relative to 1/12 of an atom of the isotope C-12 relative isotopic mass the relative mass an atom of an isotope relative to 1/12 of the mass of a C-12 atom relative molecular mass the relati...