What does the latent heat of fusion measure? O A. The energy required to heat a substance
O B. The energy required to form a substance
O c. The energy required to melt a substance
O D. The energy required to boil a substance

Complete the table for ion charge based upon their losing or gaining electrons in the outer shell. (use the periodic table as necessary.) group most likely ionic charge # of valence electrons i +1 ii +2 iii +3 iv +4 or -4 v -3 vi -2 vii -1 viii 0

12. calculate the hydroxide ion concentration of a solution with ph = 3.25. show all calculations leading to an answer

Ahypothesis must be testable and falsifiable to be considered scientific a. trueb. false