1.The reaction of iron(III) oxide (Fe2O3) and hydrogen (H2) is represented by the following unbalanced chemical equation. 1 Fe2O3(s)  3 H2(g) → 2 Fe(s)  3 H2O(l)
Determine the mass in grams of hydrogen gas needed to react completely with
33.5 g Fe2O3.
Step 1.
Step 2.
Step 3.
Step 4.

when [oh-] is 10-5  m, and [h3o+] is 10-9  m, the poh is 5 and ph is 9. again in both cases the sum of ph and poh is 14. however, the hydrogen ion concentration is not always going to be equal to exactly 1 x 10 raised to a negative number. for example, we skipped over the value of 2.0 x 10-7.

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i think its 5049.

i hope this !