1. M

    Rounding WHen exactly 5

    Question: I am very confused when to round up or down when given a situation such as this: round to 4 sig figs 30.345939 Answer: I thought that if an even number is followed by five you have to round down. Therefore wouldn't the answer be 30.34? correct answer: 30.35 why is this so? ex)...
  2. K

    Sig Figs and Molar Mass

    So, I get molar mass but how do you know how many sig figs need to go after finding molar mass?