i have done few simple questions by using p = m/v to calculate the mass, volume and density, but for this question, i don't know how to do it. Please help ^^"(adsbygoogle = window.adsbygoogle || []).push({});

(a) Define the density of a material.

>Density is the mass of the material per unit volume.

(b)Brass, an alloy of copper and zinc, consists of 70% BY VOLUME of copper and 30% BY VOLUME of zinc.

Density of Copper = 8.9 x 10^3kgm^-3

Density of Zinc = 7.1 x 10^3kgm^-3

(i)Determine the mass of copper and the mass of zinc required to make a rod of bras of volume 0.80 x 10^-3m^3

hmm..Cu = Mass x 70% x 8.9 x 10^3kgm^-3, Zn = Mass x 30% x 7.1 x 10^3kgm^-3...???

(ii)Calculate the density of brass.

I think i will know how to do this question if i know the answer for (i)... = =

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# Homework Help: Examination-Style Questions. Density of Material Questions (b)(i)(ii)

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