exam

  1. B

    a question in an university entrance exam

    hello everybody. i encountered the following question when practising for the medschool entrance exam in italy. i was trying to solve it for hours but i don't know how to get the right answer. hope somebody can help. thanks in advance. Sodium chloride (relative molecular mass = 58.5) has a...
  2. C

    pH logarithms with a basic calculator?

    I don't own a Texas instrument and I'm naturally not allowed to use my calculator during my upcoming exam. Is there a formula that I can use to solve pH logarithms? I'm having difficulty finding anything online.
  3. L

    Practice For an Upcoming Exam

    Hi there, I'm still fairly newish to the online chemistry community and was wondering if I could get a little help. I have an exam coming up in my general chemistry class, and while I'm not having a really hard time with understanding the concepts, I would like to get as much practice with the...
  4. W

    Freaking out about first chem exam!!

    Hey guys. So.. I am retaking General Chemistry II at my local community college and I am freaking about the material. I've been studying with my friend and I've been practicing problems in the book and I've been looking at the book and the skeletal powerpoints to get an idea of what concepts I...
  5. F

    Questions for my Upcoming Exam

    I cannot answer them... don't understand these questions and exams are just around the corner: Question 1: Investigation of the rate of reaction between HCl acid and pure Magnesium, in which the following curve (Above is obtained) The reaction is exothermic: Explain why, using your...
  6. jenniamigo

    Studying for an Exam.....

    So I am attempting the problems on my study guide for the test on tuesday. I understand how to recognize the precipitation, redox, and acid reactions; I did pretty well on balancing equations, and even calculating ionic equations. But then I got to the long problems and I am at a loss here. I...