Write a balanced chemical equation for the reaction.ġ12 g Ca x 1 mole x 6.02 x 10 23 at = 1.68 x 10 24 at CaĢ. Add the calcium to the beaker and cover with a plastic funnel. Show all work using unit analysisġ.2 x 10 -4 g Fe x 1 mole = 2.2 x 10 -6 molesģ1. Circle the formula units, square the molecules, and underline the atoms.Ĭonvert from grams to moles. Molar mass is the mass of 1 mole of particles.Ģ5. Formula mass is the mass of 1 mole of formula units.Ģ4. Molecular mass is the mass of 1 mole of molecules.Ģ3. Atomic mass is the mass of 1 mole of atoms.Ģ2. Remember to determine the mass of each element and add the mass of the elements together. Worksheet #2 The Mole Calculate the molecular mass of the following compounds. Covalent compounds do not require brackets. Remember, use brackets for cations or anions.
Covert 9.11 x 10 25 molecules SO 3 to moles.ĩ.11 x 10 25 molecules SO 3 x 1 mole = 151 molesĢ.9 moles CaSO 4 x 6.02 x 10 23 FU’s = 1.7 x 10 24 FU’sĥ.55 x 10 24 FU’s KF x 1 mole = 9.22 molesĭraw Electron-dot Diagrams for each of the following. Note that a particle is an atom, molecule, or formula unit.ĥ.44 x 10 26 atoms Co x 1 mole = 904 molesĢ.4 moles CO 2 x 6.02 x 10 23 molecules = 1.4 x 10 24 moleculesġ9. Use Unit Analysis to Change from particles to moles or from moles to particles. State Avogadro's # three different ways describing the number of atoms in a mole, formula units in a mole, and molecules in a mole. Use unitĪnalysis! Start the unitanalysis with 17.865 h and end with atoms H.ġ7.865 h x 3600 s x 1.5 coulomb x 6.24 x 10 18 e x 1 atom H = 6.02 x 10 23 atoms Hġ6. Period of 17.865 hours, calculate Avogadro’s number (the number of atoms in 1.00g of hydrogen). If 1.00 g of hydrogen is generated at a current of 1.50 amps (1 amp = 1 coulomb per second) and over time An amp meter is used to measure the rate of electron For every 1 electronĬonsumed 1 atom of hydrogen (exact) is generated. Mole Calculations to Molecular Formula 6ĭescribe each particle as an atom, molecule or a formula unit.ġ5 The electrolysis of water using H 2SO 4 as a catalyst is used to generate hydrogen gas. Percentage Composition Empirical Formula 5Ħ.
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