An solution containing an unknown quantity of iron(II) being titrated according to the following reaction:
If 39 mL of the unknown iron(II) solution requires 24 mL of 0.24M solution of Potassium
permanganate to observe a persistent pink color (the end point), What is the concentration of
iron (11)?

5Fe2+ (aq) + Mn0, (aq) + 8H* (aq) — 5Fe3+ (aq)) + Mn2+ (aq) + 4H20

Can someone me with these questions plz.

Select the correct answer. when carbon dioxide dissolves in water, it sometimes reacts with water to form carbonic acid as in this balanced equation: co2 + h2o → h2co3. if 495 milliliters of carbon dioxide at 25°c and 101.3 kilopascals reacts with excess water, what is the theoretical yield of carbonic acid? use the periodic table and the ideal gas resource a. 0.889 g b. 1.10g c. 1.27g d. 2.02g what's the answer! quick!

Write the chemical formula for a compound that is made of an element from group 1 and an element from group 17