Reuse the same test tubes from part A, labeled Fe2+ and Fe3+. Be sure they’re clean. Add 4 milliliters of iron(II) sulfate to the test tube labeled Fe2+. Add 4 milliliters of iron(III) nitrate to the test tube labeled Fe3+. Add 4 milliliters of potassium iodide to each test tube. Add 1 milliliter of the prepared starch solution to each test tube. Record your observations, noting any evidence of a chemical reaction. If there is no evidence of a reaction, write “no reaction.”

c. because step up transformer steps up the input voltage i.e increases the input voltage  

the number of turns are greater on the secondary side of step up transformer  

transformer does not handle dc current

a gas, having a molecular weight of 13 kg/kmol and a kinematic viscosity of 0.25 cm2/s, flows through a pipe 0.25 m internal diameter and 5 km long at the rate of 0.4 m3/s and is delivered at atmospheric pressure.

i belive it is water

50.23 i believe is correct but don't quote me on that.