Select the correct answer. Please help!!
Which item is made from a synthetic material?
A.
cotton pants
OB.
leather jacket
O C.
tissue paper
OD.
wicker basket

Which statement is true about a catalyst? a: a catalyst decreases the rate of the reaction. b. a catalyst is consumed during a chemical reaction. c. a catalyst lowers the activation energy of a reaction. d. a catalyst increases the reactant concentration during a reaction.

A20 liter cylinder of helium at a pressure of 150 atm and a temperature of 27°c is used to fill a balloon at 1.00 atm and 37°c. what is the volume of the balloon? a. 0.14 liters b. 3000 liters c. 2900 liters d. 2400 liters e. 3100 liters

How many grams of ammonia are produced when 1.0 mole of nitrogen reacts