How many grams of solute are present in 505 mL of 0.850 M KBr?

At 450 mm hg a gas has a volume of 760 l, what is its volume at standard pressure

How does a catalyst increase the speed of a reaction? a. the catalyst eliminates the activated complex stage, allowing products to form immediately. b. the catalyst lowers the energy level of the reactants, making it easier for them to react. c. the catalyst makes it easier for the activated complex to form, lowering the activation energy. d. the catalyst raises the energy level of the products, making the reaction finish sooner. reset next

Describe the forces both attractive and repulsive that occur as two atoms move closer together.