05 question (1 point) coast tutorial problem tennantite is an ore of copper with the formula cu12as4s13. 1st…

Explanation:

Step1: Calculate molar mass of tennantite

The molar mass of Cu is approximately 63.55 g/mol, As is approximately 74.92 g/mol, and S is approximately 32.07 g/mol. The molar mass of (Cu_{12}As_{4}S_{13}) is (12\times63.55 + 4\times74.92+13\times32.07) [ \begin{align*} &12\times63.55+4\times74.92 + 13\times32.07\ =&762.6+299.68+416.91\ =&1479.19\text{ g/mol} \end{align*} ]

Step2: Calculate moles of tennantite

Use the formula (n=\frac{m}{M}), where (m = 2890\text{ g}) and (M = 1479.19\text{ g/mol}) (n=\frac{2890}{1479.19}\approx1.953\text{ mol})

Step3: Calculate moles of copper

In one - mole of (Cu_{12}As_{4}S_{13}), there are 12 moles of Cu. So moles of Cu in 1.953 mol of (Cu_{12}As_{4}S_{13}) is (1.953\times12 = 23.436\text{ mol})

Answer:

23.44 (rounded to two decimal places)