Pls help me i dont know this

1) If I had 12.6 mol Cl2 how many mol of FeCl3 would be made in:
2Fe + 3Cl2 --> 2FeCl3

Question 8 options:

8.4

4.2

12.6

2) If I had 500g of Fe, how many mol FeCl3 would be produced in:
2Fe + 3Cl2 --> 2FeCl3

Question 9 options:

27.98

8.95

17.91

3)If 2 molecules of one reactant combine with 5 molecules of another to produce 3 molecules of a product, then which of the following is the correct representation of the reaction?

Question 10 options:

2A + 3B --> 5C

2A + 5B --> 3C

A2 + B5 --> C3

4) When ethane (C2H6) burns, it produces carbon dioxide and water:

2C2H6 (g) + 7O2 (g) 4CO2 (g) + 6H2O (l)

How many moles of water will be produced when 16 moles of ethane are burned?

Question 11 options:

64 moles

32 moles

48 moles

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