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Mass of a solution that has a density of 0.775 g/mL

  1. Jan 28, 2009 #1
    What is the mass of a solution that has a density of 0.775 g/mL and a volume of 50.0 mL?
     
  2. jcsd
  3. Jan 28, 2009 #2
    Re: chemistry

    I am not sure how to find the mass
     
  4. Jan 28, 2009 #3

    Ygggdrasil

    User Avatar
    Science Advisor
    2015 Award

    Re: chemistry

    Density = mass / volume

    Rearrange the equation to solve for mass.
     
  5. Jan 28, 2009 #4
    Re: chemistry

    To be more explicit, you have two equations already and now Ygggdrasil has given you a third. You can combine these to find the answer you're seeking. When trying to solve something with equations it's helpful to write down what you know and what you are seeking. It helps clarify the process.

    Known

    [tex]Density = \frac{0.775 g}{mL}[/tex]

    [tex]Volume = 50.0 mL[/tex]

    [tex]Density = \frac{Mass}{Volume}[/tex]

    Seeking

    The Mass

    Method

    Look at the equations you have and try to rearrange them to isolate the thing you want (mass) on one side of an equation. Do this without numbers at first. Just look at the variables first (density, mass, and volume).

    1) Isolate the variable you are seeking (mass) using algebra
    2) Plug in the values you have to find the answer

    What do you get?
     
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