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dr-w

dr-w

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dr-w
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  • mass % = mass H2O / mass total x 100% = (1.22g - 0.77g) / (1.22g) x 100% = ___ %
    in Experimental mass percentage? Comment by dr-w June 2021
  • considering that "CH2" would have a -2 charge and 2 unshared electron pairs, it would be polar if it existed.
    in Is CH2 polar or nonpolar? Comment by dr-w June 2021
  • CC equation... ln(P1 / P2) = -ΔHvap / R) x (1/T1 - 1/T2) rearranging.. ln(P1) - ln(P2) = (-ΔHvap / R) x (1/T1) + (ΔHvap / R) x (1/T2) rearranging... ln(P1) = (-ΔHvap / R) x (1/T1) + (ΔHvap / R) x (1/T2) + ln(P2) and if we assume (T2,P2…
    in Natural Log of Vapor Pressure? Comment by dr-w June 2021
  • so.. this is basically just a conversion problem.. And conversions are best done by what technique? that's right "factor label method".. aka.. "Dmensional analsis" and we apply DA like this (1).. sort through the problem and…
    in General chemistry problem about asbestos.? Comment by dr-w May 2021
  • Penny candy rules!
    in Do you remember? Comment by dr-w May 2021
  • Penny candy rules!
    in Do you remember? Comment by dr-w May 2021
  • divide 478 ppm by molar mass in g/mole ********** ppm is parts per million if that is ppm by mass.. and it is say ppm A in a mixture then... 1 ppm A = 1 g A / 10^6 g mixture (1 g A / 10^6 g mixture) x (1 mole A / X g A) x (10^6 µm / mol…
    in how do i convert ppm to micromoles/gram? Comment by dr-w May 2021
  • Seems a bit silly for chemteam to say "that's a very good score. Go eat ice cream" without having any basis to back it up. So let's look at your score compared to other students. ********* from collegeboard.com, the grade distributi…
    in Chemistry AP EXAM SCores? Comment by dr-w May 2021
  • Seems a bit silly for chemteam to say "that's a very good score. Go eat ice cream" without having any basis to back it up. So let's look at your score compared to other students. ********* from collegeboard.com, the grade distributi…
    in Chemistry AP EXAM SCores? Comment by dr-w May 2021
  • divide 478 ppm by molar mass in g/mole ********** ppm is parts per million if that is ppm by mass.. and it is say ppm A in a mixture then... 1 ppm A = 1 g A / 10^6 g mixture (1 g A / 10^6 g mixture) x (1 mole A / X g A) x (10^6 µm / mol…
    in how do i convert ppm to micromoles/gram? Comment by dr-w May 2021
  • divide 478 ppm by molar mass in g/mole ********** ppm is parts per million if that is ppm by mass.. and it is say ppm A in a mixture then... 1 ppm A = 1 g A / 10^6 g mixture (1 g A / 10^6 g mixture) x (1 mole A / X g A) x (10^6 µm / mol…
    in how do i convert ppm to micromoles/gram? Comment by dr-w May 2021
  • Penny candy rules!
    in Do you remember? Comment by dr-w May 2021
  • Penny candy rules!
    in Do you remember? Comment by dr-w May 2021
  • so.. this is basically just a conversion problem.. And conversions are best done by what technique? that's right "factor label method".. aka.. "Dmensional analsis" and we apply DA like this (1).. sort through the problem and…
    in General chemistry problem about asbestos.? Comment by dr-w May 2021
  • so.. this is basically just a conversion problem.. And conversions are best done by what technique? that's right "factor label method".. aka.. "Dmensional analsis" and we apply DA like this (1).. sort through the problem and…
    in General chemistry problem about asbestos.? Comment by dr-w May 2021
  • so.. this is basically just a conversion problem.. And conversions are best done by what technique? that's right "factor label method".. aka.. "Dmensional analsis" and we apply DA like this (1).. sort through the problem and…
    in General chemistry problem about asbestos.? Comment by dr-w May 2021
  • so.. this is basically just a conversion problem.. And conversions are best done by what technique? that's right "factor label method".. aka.. "Dmensional analsis" and we apply DA like this (1).. sort through the problem and…
    in General chemistry problem about asbestos.? Comment by dr-w May 2021
  • CC equation... ln(P1 / P2) = -ΔHvap / R) x (1/T1 - 1/T2) rearranging.. ln(P1) - ln(P2) = (-ΔHvap / R) x (1/T1) + (ΔHvap / R) x (1/T2) rearranging... ln(P1) = (-ΔHvap / R) x (1/T1) + (ΔHvap / R) x (1/T2) + ln(P2) and if we assume (T2,P2…
    in Natural Log of Vapor Pressure? Comment by dr-w May 2021
  • CC equation... ln(P1 / P2) = -ΔHvap / R) x (1/T1 - 1/T2) rearranging.. ln(P1) - ln(P2) = (-ΔHvap / R) x (1/T1) + (ΔHvap / R) x (1/T2) rearranging... ln(P1) = (-ΔHvap / R) x (1/T1) + (ΔHvap / R) x (1/T2) + ln(P2) and if we assume (T2,P2…
    in Natural Log of Vapor Pressure? Comment by dr-w May 2021
  • mass % = mass H2O / mass total x 100% = (1.22g - 0.77g) / (1.22g) x 100% = ___ %
    in Experimental mass percentage? Comment by dr-w May 2021