1.Aqueous solutions of sodium and copper (II) chloride are mixed together. which statement is correct?

Question

a. both NaCl and CuS will precipitate from solution
b. no precipitate will form
c. CuS will precipitate from solution
d. NaCl will precipitate from solution
e. no reaction will occur

2. Sorbose, C6H12O6, is used in making vitamin C. A sorbose sample containing 72.0 g of carbon atoms also contain __ g of hydrogen atoms. (show work)

3. Cu2S + O2 yields 2Cu + SO2
What mass of copper (I) sulfide is required in order to prepare 0.700 kg of copper metal?

4. The following change occurs in acidic solution: __S^2- + __Cr2O7^2- yields ____S + ___Cr3+