aamc 4 #18

[Jonass00]

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object with 15 grams mass is immersed in benzene and suffers apparent loss of mass of 5 grams. what is the approximate specific gravity of the object? S.G of benzene is 0.7.

i had this worked out with the math a few weeks ago but i lost the sheet and as i was reviewing the test again i have a major brain fart behind the concept of this question. can someone help with the math concept behind this please, thank you in advance.

 

[loveoforganic]

0.7 g/mL for benzene. 5 g / 0.7 g/mL = ~7 ml displaced = volume of the object.

15 g / 7 mL = slightly greater than 2 g/mL

 

[Brittanyboop115]

I set it up as a ratio. I set 15g/5g equal to x/0.7 grams and got x=2.1. I think that was one of the answer choices.