PLEASE HELP I'VE DONE MOST OF THEM BUT THESE I DONT GET ( 30 POINTS)!!! 1. Tin (II) Chloride is mixed with Manganese metal, as shown below. Which of the following compounds will exist afterwards?

SnCl2 + Mn --> ?

Select one or more:
a. SnCl2
b. MnCl2
c. SnCl and MnCl
d. SnMn
e. Cl2

2.What is the oxidation number for Cobalt in the following compound?

CoSO4

Select one or more:
a. 0
b. 1
c. 2
d. 3
e. 4

3. Which of the following compounds will exist after Nickel (II) Oxide is mixed with Calcium as shown below?

NiO + Ca --> ?
Select one or more:
a. O2
b. CaO
c. NiCa
d. CaO2

4. In the following reaction, which element is being reduced?

C2H2 + O2 --> H20 + CO2

Select one or more:
a. O
b. H
c. C
d. C and H

5. When the following two aqueous solutions are mixed, what will happen?

Na3PO4 (aq) + Al(NO3)3 (aq) -->

Select one or more:
a. AlPO4 will appear as a precipitate.
b. PO4NO3 will appear as a precipitate.
c. AlNa3 will appear as a precipitate.
d. NaNO3 will appear as a precipitate.
e. No reaction. The ions will remain dissolved in water.

6. When these aqueous solutions are mixed, which of the following will happen?

AgNO3 (aq) + KI (aq) -->

Select one or more:
a. No reaction. The ions remain in an aqueous state.
b. KNO3
c. INO3
d. AgK
e. AgI

Nconcentration refers to the molar concentration of an ion in solution. it may be identical to, or greater or less than, the molar concentration of the compound containing the ion that was used to make the solution. for soluble salts, the molarity of a particular ion is equal to the molarity of that compound times the subscript for that ion. for example, 1 m of alcl3 is 1 m in al3+ and 3 m in cl−. 1 m of (nh4)2so4 is 2 m in nh4+ and 1 m in so42−. part a what is the concentration of k+ in 0.15 m of k2s? view available hint(s) nothing m m part b if cacl2 is dissolved in water, what can be said about the concentration of the ca2+ ion? view available hint(s) if is dissolved in water, what can be said about the concentration of the ion? it has the same concentration as the cl− ion. its concentration is half that of the cl− ion. its concentration is twice that of the cl− ion. its concentration is one-third that of the cl− ion. part c a scientist wants to make a solution of tribasic sodium phosphate, na3po4, for a laboratory experiment. how many grams of na3po4 will be needed to produce 550 ml of a solution that has a concentration of na+ ions of 0.700 m ? express your answer numerically in grams. view available hint(s) mass of na3po4 n a 3 p o 4 = nothing g provide feedback