Chemistry Mid-Term 1 Notes

Chemistry Mid-Term 1 Notes - Chemistry Mid-Term 1 Notes...

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Chemistry Mid-Term 1 Notes ViCi = VfCf Strong electrolytes are good conductors of electicity To find the molecular formula of 2 given masses: o Convert grams into mols of given compounds o Divide the one with more mols, by the one with less mols This tells you how many of each compound are in the emp. Form. o Find the Empirical Formula [(grams/mol)+(grams/mol) = Empirical Formula Mass o To find molecular formula: [(Molar mass of compound)/(emp. Formula mass)] = # Formulas per mol o Now multiply emp. Formula by # Formulas per mol (Avg. Amu)=(%ele.2)(Amu ele2) + (100-%ele2)(A) Solve for A To find # of atoms o Find total molar mass o Convert grams to mols o Multiply into avogadro’s mol o Turn into atoms Calculating Mass % o Divide the mass of the element you’re trying to find % of By the molar mass of the compound it’s in Finding empirical formulas o Convert each element to mols o Divide each mol by the smallest # Finding pressure o [Mols(nR)(T)]/V o Avg. KE = (3/2)(RT) o Root Mean Square Velocities (avg. velocity of gas particle) = (3RT/M)^(1/2) Finding concentrations o Concentration = amount of X / Vsoln o Convert compound from g mols
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Chemistry Mid-Term 1 Notes - Chemistry Mid-Term 1 Notes...

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