You are performing an experiment in your lab. to compare with other experiments you need your results to be in moles. during your final step you collect your product and weigh it. you have 600 grams of mg(h2po4)2 (magnesium dihydrogen phosphate). how should you enter your results?

To be able to compare the result with other experiments it has to be reported in moles.

number of moles = mass / molecular weight

number of moles of Mg(H₂PO₄)₂ = 600 / 218 = 2.75 moles

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it's c. elements are placed in rows based on how may valencies electrons have.