amount of substance

• what is the ideal gas equation?

  pressure x volume = moles x gas constant x temp
• how do you convert from degrees to K?

  +273
• how do you convert from cm$^2$ to m$^2$?


  x 10$^{-6}$
• how do you convert from dm$^2$ to m$^2$?


  x 10$^{-3}$
• what is atom economy?

  percentage of reactants that becomes useful products?
• what is the equation for atom economy?

  (mass of desired product/total mass of reactant) x 100
• what is percentage yield?

  comparison of actual yield to percentage yield
• what is the equation for percentage yield?

  (moles of a specific product/theoretical max moles of product) x 100
• what is the empirical formula?

  simplest whole number ratio of elements
• what is molecular formula?

  actual number of atoms in element
• how do you work out the molecular formula?

  empirical x whole number
• what is relative atomic mass?

  the relative mass of its atoms compared to the mass of a carbon-12 atom
• what is relative molecular mass?

  sum of the atomic masses of all the atoms in a formula
• what is avogadros's constant?

  number of particles in 1 mole (6.02 x 10$^{23}$)