Posted by **Anonymous** on Thursday, August 29, 2013 at 10:52pm.

You add 6.4g g of iron to 27.80mL mL of water and observe that the volume of iron and water together is 28.61mL mL . Calculate the density of iron.

- chemistry -
**B**, Thursday, August 29, 2013 at 11:07pm
density = mass/volume

mass = 6.4 grams

volume = 28.61 mL - 27.80 mL = 0.81 mL

density = 6.4 grams/0.81 mL

density of Fe = 7.9 g/mL

- chemistry -
**igotnoclue**, Monday, September 9, 2013 at 10:07pm
hello there friend actually i have this same kind of question tht my teacher gave me 2.5g of iron shot is added to a graduated cylinder containing 45.50 ml of water.the water level rises to the 49.10 ml mark, from this information, calculate the denstiy of iron.so, what i did was just use the formula of d=m/v just use the mass tht u add to the water in ur case its 6.4g and divide it by 28.61 which is ur new observed volume and get the density of ur fe like tht i hope i helped u and i am right hehe :D i probably wont reply anymore as i dont hangout on this site

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