Calculations in Chemistry 0.0 / 5 ? ChemistryCalculationsIGCSEEdexcel Created by: HannahCopnerCreated on: 13-05-18 15:39 How do you find the moles of a solid or pure liquid substance? Mass (g) / Atomic mass 1 of 10 How do you find the moles in a solution (aq)? Volume (cm^3) / 1000 * Concentration (mol dm^-3) 2 of 10 How do you find the moles in a gas? Volume (cm^3) / 24000 3 of 10 How do you find the % yield? mass of product made / total expect mass * 100 4 of 10 How do you find the atomic mass of an element with isotopes? (% in atmosphere * atomic mass)+(% * mass) / 100 5 of 10 How do you find the energy transferred (J)? mass (g) * 4.2 * change in temperature (celcius) 6 of 10 How do you find the enthalpy change (KJmol^-1) Energy transferred / no. of moles 7 of 10 How do you find the bond enthalpy? The bonds broken - the bonds made 8 of 10 How do you find the quantity of charge (coulombs) in electrolysis? Current * time 9 of 10 How much charge (coulombs) is 1 mole of electrons in electrolysis? 96500 C => moles of elecrons = charge / 96500 10 of 10
Comments
No comments have yet been made