November 29, 2015

Homework Help: Chemistry

Posted by Sara on Wednesday, August 22, 2007 at 5:30pm.

The Densities of Liquids and solids

O.k. so here is my problem. I will give you the whole problem just incase my mistake is somewhere else, but the volume for the metal and the density for the metal in the end seem to be wrong.

(Density of unknown liquid)
Mass of empty flask plus stopper 37.34g. Mass of stoppered flask plus water 63.67g. Mass of stoppered flask plus liquid 52.01. Mass of water (that I calculated) 26.33. Volume of flask(density of H2O at 25 degrees C, 0.9970 g/cm^3 (this was given) I calculated 37.45.
Mass of Liquuid 14.67. Density of liquid 14.72.
This is were my problem arises but I give you the above because the weight of the flask is the same...and I used that density.
(Density of unknwn metal)
Mass of stoppered flask plus metal 61.28. Mass of stoppered flask plus metal plus water 78.19. Mass of metal (according to my calculation) 23.94. Mass of water (also according to me) 16.91 and the volume of the water I calculated is 16.96. For the Volume of the metal I got 24.01 and for the density of the metal I got 0.991 g/cm^3....this seems odd, since the water and the metal would have the same I figure I must be doing something wrong. I am really not sure what numbers to use to figure out the volume and density of the metal.

Please Help! I know this seems long, I just don't know were my mistake is.

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