How many milliliters of a 2.00 M KBr are needed to prepare 250.0 mL of 0.60 M KBr?

What is the common name for the compound shown here? enter the common name of the compound shown?

Which best describes the activation energy of a chemical reaction? a. the combined energy of all the reactants b. the amount of energy required for a reaction to occur c. the difference in energy between products and reactants d. the potential energy stored in the bonds of reactants and products

Stoichiometry- i need with 14 and 15! an explanation would be appreciated!