What is the mass of 2.15 moles of calcium hydroxide, Ca(OH)2?

A48 g piece of ice at 0.0 ∘c is added to a sample of water at 7.4 ∘c. all of the ice melts and the temperature of the water decreases to 0.0 ∘c. how many grams of water were in the sample?

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

If you want to create an electrical current, which situation would produce a solution capable of this