Question

An ore sample is found to contain 10.500000 g of cobalt and 87.3 g waste rock (gangue). What is the

percent by mass of cobalt in the ore?

Answer 1

`\% Co=10.7\%`

Step-by-step explanation:

Hello!

In this case, since this is a mixture composed by cobalt and waste rock, we can compute the percent by mass of cobalt as shown below:

`\% Co=(m_(Co))/(m_(Co)+m_(waste)) *100\%\\\\`

Thus, we plug in to obtain:

`\% Co=(10.500000g)/(10.500000g+87.3) *100\%\\\\\% Co=10.7\%`

Best regards!