Hii pls help me to balance chemical equation calcium hydroxide + hydrochloric acid > calcium chloride + water​

Use examples from the article to explain one positive and one negative effect that chemistry has had on society.

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?

How is the atomic number of a nucleus changed by alpha decay