What is the pH of a solution with a hydrogen-ion concentration of 4.2 x 10-10
M?

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

Apiece of copper has a temperature of 75.6 0c. when the metal is placed in 100.0 grams of water at 19.1 0c, the temperature rises by 5.5 0c. what is the mass of the metal?

In a reaction equation, where are the products located? a.) above the arrow b.) to the right of the arrow c.) to the left of the arrow d.) below the arrow