contestada

Chalcopyrite, the principal ore of copper (Cu), contains 34.63 percent Cu by mass. How many grams of Cu can be obtained from 7.35 x 10^3 kg of the ore?

Respuesta :

JannetPalos

Answer:

[tex]2.55\times 10^{6}g[/tex] Cu can be obtained from [tex]7.35\times 10^{3}kg[/tex] ore

Explanation:

1 kg = 1000 g

So, mass of ore is [tex](7.35\times 10^{3}\times 1000)g[/tex] = [tex]7.35\times 10^{6}g[/tex]

Now, 100 g of ore contains 34.63 g of Cu

So, [tex]7.35\times 10^{6}g[/tex] ore contains [tex]\frac{(34.63g)\times (7.35\times 10^{6}g)}{100g}[/tex] Cu or [tex]2.55\times 10^{6}g[/tex] Cu.