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Unit 7

Chemistry

QuestionAnswer
What is Avogrado's number? 6.022x10^23, named after an Italian scientist who helped clarify the difference between atoms and molecules.
Define representative particles. Can mean atoms, ions, molecules or formula units of a substance.
What are the 7 diatomic molecules? BrINClHOF.
How do you convert representative particles to moles? Rep. particles x 1 mol/6.022x10^23 rep. particles. Rep. particles cancel each other out.
How do you convert moles to representative particles? Moles x 6.022x10^23 rep. particles/1 mol.
How do you calculate molar mass? Calculate atomic mass (add protons & neutrons) multiply the atomic mass by the number of atoms the element has written.
How do you find mass of a mole of a compound? Find the number of grams of each element in 1 mole of the compound and then add the masses.
What is Avogadro's hypothesis? He states that equal volumes of gases at the same temp and pressure. Contains equal number of particles.
Define STP. Standard temp & pressure (STP) is a temp of 0 C and a pressure of 101.3KPa or 1 atm.
What is a molar volume of gas? At STP, 1 mol or 6.022x10^23 representative particles of any gas occupies a volume of 22.4 L.
How do you convert volume to moles? Volumex1 mol/22.4 L
Created by: CoraEvelynnBaker
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