AQA Chemistry Amount of substance.

Pregunta	Respuesta
What is molar mass the same as?	The relative molecular mass.
How do you work out moles?	Mass Moles=-------------------- Molar mass/ Mr
How do you work out concentration?	Moles Concentration=---------------------------- Volume in dm^(3)
How do you convert cm^(3) to dm^(3)?	divide by 1000.
What is the volume of any gas at room temperature pressure? (298K/25C and 100kPa)	24dm^(3)
How do you work out the moles in a volume of gas at ROOM TEMP PRESSURE.	Volume in dm^(3) Number of moles=----------------------------- 24
What is the ideal gas equation?	pV= nRT
What is 'P' in the ideal gas equation and what are its units?	Pressure (Pa)
What is 'V' in the ideal gas equation and what are its units?	Volume (m^(3))
How do you convert cm^(3) to m^(3)?	divide by 1,000,000
What is 'R' in the ideal gas equation and what is its units?	The gas constant. ALWAYS 8.31 JK^(-1)mol^(-1)
Define relative atomic mass.	Average mass of an atom of an element ----------------------------------- 1/12 x mass of one atom of 12C
Define relative molecular mass.	average mass of one molecule of an element --------------------------------------- 1/12 x mass of one atom of 12C
how many particles does one mole contain? ( Avogadro constant)	6.023 x 10^(23)
What is T in the ideal gas equation and what is its units?	Temperature in Kelvin ( K) - add 273 to Celsius.
What is empirical formula?	The simplest whole number ratio of atoms of each element in a compound.
What is molecular formula?	The actual number of atoms of each element in one molecule.
How do you calculate % atom economy?	mass of desired product --------------------------------- x100 total mass of reactants
How do you calculate percentage yield?	actual yield ------------------ x100 Theoretical yield

Siguiente

AQA Chemistry Amount of substance.

Descripción

Resumen del Recurso

Similar

	Creado por Megan Vann hace casi 10 años