If a reaction is reversible what are the relative amounts of reactant and product

Which is true of chemicals? a. things containing chemicals always cost a lot of money. b. chemicals are never dangerous. c. chemicals are in many substances in a home. d. chemicals are rarely found on earth.

Calculate the number of kilojoules to warm 125 g of iron from 23.5°c to 78.0°c.

Building glycogen from glucose molecules is an example of