Posted by **julia** on Thursday, December 16, 2010 at 11:58am.

A 20.5 lb cast iron boat anchor displaces 1.33 qt of water when submerged. What is the density of the cast iron, in g/cm3?

1L=1.057 qt

1kg=2.205lb

1lb=453.6g

20.5lb X 453.6g/ 1lb = 9298.9g

1.33qt X 1L/1.057qt = 1.26L

1.26L X 1000cm3/1L = 1260cm3

9298.9g/1260cm3 = 7.38g/cm3

**now why my teacher answer is 7.39g/cm3???

- chem/plz/check work studying for a final -
**DrBob222**, Thursday, December 16, 2010 at 3:46pm
I think you rounded too soon. Just leave those numbers in the calculator.

20.5 x 453.6 = 9298.8 g (slight difference)

1.33 x 1000/1.057 = 1258.3 cc

9298.8/1248.3 = 7.39 g/cc.

- chem/thank you DrBob22 -
**julia**, Thursday, December 16, 2010 at 7:44pm
thank you so much....your good, I wish you be my teacher I be passing my class with no problem....

## Answer This Question

## Related Questions

- chem - If you pour equal amounts of scalding hot water into different metallic ...
- Finite - Kane Manufacturing has a division that produces two models of hibachis...
- Physics - What will be the final temperature of 130 g of 20°C water when 100 g ...
- Physical Science 2 - Given that iron has a density of 7.87 g/cm3, calculate the ...
- Chemistry Concept - The iron in steel has a density of 7.86 g/cm3. When iron ...
- Algebra - The density of iron is 7.87 g/cm3, and the average mass for one iron ...
- physics - What is the density of a solid 1.5 kg paperweight that gets submerged ...
- Physics - A 4.0-kg cylinder of solid iron is supported by a string while ...
- English - I forgot to include the following sentences. I have to check the ...
- finite - Kane Manufacturing has a division that produces two models of hibachis...

More Related Questions