Avogadros number - Study guides, Class notes & Summaries

Avogadro's number 6.022 x 10^23 atoms = 1 mole 1 u = ___ g 1.661 x 10 ^-24 g formula mass the sum of the average atomic masses of each atom represented in the chemical formula and is expressed in atomic mass units. --The formula mass of a covalent compound is also called the molecular mass. The chemical identity of a substance is defined by the types and relative numbers of atoms composing its fundamental entities (molecules in the case of covalent compounds, ions in the case of ioni...

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...

Avogadro's Number - Answer-6.02E23 amu in grams - Answer-1.66E-24 grams weight of a proton or neutron? - Answer-1 amu or 1.66E-24 grams Carbon-12 the most abundant isotope weighs exactly? (amu) - Answer-12 amu, it was the bench mark for amu. Difference between atomic mass and atomic weight? - Answer-Atomic mass is the amount of mass of a particular atom say carbon-12, or carbon-13. Atomic weight is the weighted average of all the isotopes of an element according to abundance. Ele...

CHEM 120 FINAL EXAM 2023/2024 QUESTIONS WITH 100% CORRECT ANSWERS

Exam 1 EGN3365 Study Guide @ 2024 ...

HESI A2- Chemistry Paper 1 Exam 2023 Tera - CORRECT ANSWER-(T) 1 quadrillion times- e12 Giga - CORRECT ANSWER-(G) 1 billion times - e9 Mega - CORRECT ANSWER-(M) 1 million times- e6 Kilo - CORRECT ANSWER-(k) 1 thousand times - e3 Hecto - CORRECT ANSWER-(h) 1 hundred times - e2 Deka - CORRECT ANSWER-(D) 10 times - e1 Deci - CORRECT ANSWER-(d) 1 tenth of - e-1 Centi - CORRECT ANSWER-(c) 1 hundredth of - e-2 Milli - CORRECT ANSWER-(m) 1 thousandth of - e-3 Micro - CORRECT ANSWER-(u) 1 mill...

scientific notation - correct answer -if the exponent is positive it will be a BIG number -if the exponent is negative it will be a SMALL number length - correct answer meter mass - correct answer kilogram temperature - correct answer kelvin time - correct answer second amount of substance - correct answer mole area - correct answer A m^2 volume - correct answer V m^3 density - correct answer D kg/m^3 concentration - cor...

Chem 103: Module 4 graded A+ by experts 2024/2025

2 electron groups, 0 lone pairs - correct answers--Linear 3 electron groups, 0 lone pairs - correct answers--Trigonal Planar 3 electron groups, 1 lone pair - correct answers--Bent-120 4 electron groups, 0 lone pairs - correct answers--Tetrahedral 4 electron groups, 1 lone pair - correct answers--Trigonal Pyramidal 4 electron groups, 2 lone pairs - correct answers--Bent 109.5 5 electron groups, 0 lone pairs - correct answers--Trigonal Bipyramidal 5 electron groups, 1 lone pair - correct an...

Semmelweis entrance exam (N) The mole concept - Answer- A method that allows the relative number of reactant particles involved in a chemical reaction to be known Avogadro's number - Answer- number of representative particles in a mole, 6.02 X 10^23 Basic structures of atoms - Answer- There is a nucleus in the center surrounded by an electron cloud or field Quantum numbers - Answer- Quantum numbers describe values of conserved quantities in the dynamics of a quantum system. In the c...