Maria F.

asked • 11/26/12

the mass of 1.2x10^37 molecules of an element is 1.56x10 grams. what is the mass of en element molecule?

what is the mass of the element that i have written above?

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Robert J. answered • 11/26/12

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Using Avogadro's Number (6.02 x 10^23),

molar mass = 15.6*(6.02 x 10^23)/(1.2x10^37) = 7.826 x 10^(-13) g/mol

There is no such a light molecule. Is it 1.56x10^14 grams?

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Maria F.

thank you i have another question

54x^3-90x^2+33x-55?

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11/26/12

Maria F.

the aboce question is a polynomial

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11/26/12

Robert J.

54x^3-90x^2+33x-55

= 18x^2(3x-5) + 11(3x-5)

= (18x^2-5)(3x-5)

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11/27/12

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