How do you calculate #10 with the information given here? Ignore the other quest

Question

How do you calculate #10 with the information given here? Ignore the other questions, already have done them, just don't get how you go about calculating the initial mass of copper from this.

**The recovered mass of copper at the end was 0.015grams, forgot to add that.

5. ICU(NH Observation Observation: Observation We do not complete the last step of the copper cycle in this experiment because one of the products produced is a toxic gas. 8. (0.5 pt) The toxic gas produced is and it is 9. (1 pt) Complete and balance the equation for the last step of the copper cycle. _in color. 10. (0.5 pt) Calculate the initial mass of copper (in g) (show your work). Answer 11(1 pt) Calculate the % recovery of the copper sample (show your work). Recovered mass of copper (in g): Recovered mass of copper × 100 % % recovery =-tial mass of copper Answer

Explanation / Answer

Recovery of Cu experiment

10. initial mass of copper = molarity Cu(NO3)2 x volume of solution x molar mass Cu

                                         = 0.1 M x 0.003 L x 63.546 g/mol

                                         = 0.0191 g

11. mass of recovered copper from the experiment = 0.015 g

% recovery = (0.015/0.0191) x 100

                   = 78.53%

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