Answered

\([\frac{45.82g}{3.0cm^{3} } - \frac{0.64g}{0.859cm^{3} } ]\)÷ 2

 Please help I keep getting 7.26, but the answer is 3.0g/cm^3 What am I doing wrong?
:<

Verified Answer :

wolf1728

(45.82g / 3 cc - .64g / .859) / 2



(15.2733333333  -



0.7450523865) / 2



14.5282809468



/ 2

and I get



7.2641404734





I'd say make sure all those numbers you posted (45.82; 3.0, etc) are correct.
Also, going by the units you have listed, the answer CAN'T be in 1/cm^3 units because the units should cancel and you'd have a dimensionless number.

apologiabiology

multiply left fraction by (0.859)/(0.859) and right one by (3/3)

\(\frac{ \frac{(0.859)(45.82g)}{(0.859)(3cm^3)} - \frac{(3)(0.64g)}{(3)(0.859cm^3)} }{2}\)=
\(\frac{ \frac{(0.859)(45.82g)-(3)(0.64g)}{(0.859)(3cm^3)} }{2}\)=
\(( \frac{(0.859)(45.82g)-(3)(0.64g)}{(0.859)(3cm^3)})( \frac{1}{2})\)=
\(( \frac{(0.859)(45.82g)-(3)(0.64g)}{(2)(0.859)(3cm^3)})\)=
use calculator
\(7.26414\frac{g}{cm^3}\)

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