WILL GIVE BRAINLIEST AND 20 POINTS! How many grams of calcium hydroxide are needed to make 1000 mL of 0.250M solution?

If i initially have a gas at a pressure of 12 atm, a volume of 23 liters, and a temperature of 200 k, and then i raise the pressure to 14 atm and increase the temperature to 300 k, what is the new volume of the gas?

Observation and experimentation have led many scientists to accept a theory about the origin of the universe. this theory is called the big bang theory. scientific evidence collected and observed by scientists around the world suggests that the universe is ever expanding from a hot and dense initial state. what makes this a scientific theory? (2 points)

Calculate the percent composition by mass of each element in al(oh)3. use at least three significant figures.