A - Vinegar - Acid
B - NaOH- Base
C - HCL - Acid
D - HNO3 - Acid
NaOH is a base because when it is dissolved in water it dissociates into Na+ and OH- ions. When it had OH- ( hydroxyl ion ) ions, it automaticly is a base; thus, NaOH must be a base.
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Answer:
B. NaOH
Explanation:
The formula C2H4 can be classified as both a molecular formula and an empirical formula. The answer is number 4.
acetic acid
4) pink phenolphthalein
