What does a base release when it is placed in water? Select one:
a. Chloride ion (Cl-)
b. Hydronium ion (H3O+)
c. Calcium ion (Ca2+)
d. Hydroxide ion (OH-)

Which stage of the cell cycle usually takes the longest?

City a and city b had two different temperatures on a particular day. on that day, four times the temperature of city a was 8â° c more than 3 times the temperature of city b. the temperature of city a minus twice the temperature of city b was â’3â° c. what was the temperature of city a and city b on that day? city a was 5â° c, and city b was 4â° c. city a was 3â° c, and city b was â’1â° c. city a was 8â° c, and city b was â’3â° c. city a was 5â° c, and city b was â’5â° c.

Express the following number in scientific notation. 0.026890 =