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    Can someone help me with water hardness chemistry question?

    A sample of water has a hardness of 120ppm CaCO3. What is the concentration of Ca2+ in moles/liters? Any help at all would be greatly appreciated!
  2. Y

    Can someone help me with water hardness chemistry question?

    A sample of water has a hardness of 120ppm CaCO3. What is the concentration of Ca2+ in moles/liters? Any help at all would be greatly appreciated!
  3. Y

    How are you supposed to dress for salsa dance lessons?

    It says wear high heels and comfortable clothes and it is done at my college, so what do you think is considered comfortable clothes? Workout clothes, jeans and a t shirt, what?
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