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  1. R

    Need help with isotopes: Chemistry!

    how do i find calculate the average atomic mass for sulfur?
  2. R

    Need help with isotopes: Chemistry!

    1. Homework Statement Sulfur has 4 naturally occurring isotopes: Sulfur-32 Abundance = 95.0% Sulfur-33 Abundance = 0.76% Sulfur-34 Abundance = 4.22% Sulfur-36 Abundance = 0.014% Sulfur's symbol is S, it has 16 electrons and a mass of 32.06g 2. Homework Equations I'm actually...
  3. R

    Chemistry Chemistry regarding moles!

    1. Homework Statement How many moles is 34.8 of sodium hypochlorite ? 2. Homework Equations 34.8g (1mol/____g) = ______mol 3. The Attempt at a Solution 34.8g (1mol/58.44g) = 2033.712mol Not quite sure if this is how things work, hopefully you can give me a few hints.
  4. R

    Test tomorrow need help

    Thanks guys, I failed the test...lol :S
  5. R

    Test tomorrow need help

    I'm taking chemistry in my sophmore year, I need help with writing names or chemical formulas, to be honest I don't know anything whatsoever. For example: HOW can I possibly know that Calcium Selenide would be CaSe in chemical formula Or that (NH4)2SO4 is ammonium sulfate ?????????? I...
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