What is ph?
a. how basic a solution is
b. the concentration of potassium ions in solution
c. how acidic a solution is
d. the concentration ions in a solution

i think the answer is d and i look it up online or c those are the two answer i got

Explanation:

ANSWER:

the only answers that make sense is A and B

pH tells how basic or acidic neutral a substance is, if the pH is higher than 7 its acidic

if its lower than 7 than is basic it its 7 its neutral

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"the periodic table is arranged in order of atomic number."

answer:

the reaction is type of combination reaction.

explanation:

on the product side, there are 2 molecules of bonded to fe   which means one atom of fe are combined two molecules of . so, balanced chemical equation becomes :

this reaction follows the reaction type of combination reaction. a combination reaction is defined as chemical reaction in which reactants combines together to form a single product.