a student has 15.85 g of iron metal. answer the following questions and show your work! a. how many moles of iron does the student have? ​

beta decay is the answer

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.

answer by yourhope:

how do models compare to real-world objects?

d. most models represent a real-world object in a simpler way.

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its first and third is your answer i did the qustion the fourth isnt right