Which of the following helps reduce the flow of thermal energy from within your house to the outside? A.) High efficiency appliances
B.) Attic insulation
C.) Use of solar energy instead of fossil fuels

Endeleev saw trends in the physical and chemical properties of elements when he organized them by

How many moles of gas are present if p=11 atm, v=12l, t=185k?

Ammonium perchlorate nh4clo4 is the solid rocket fuel used by the u. s. space shuttle. it reacts with itself to produce nitrogen gas n2 , chlorine gas cl2 , oxygen gas o2 , water h2o , and a great deal of energy. what mass of nitrogen gas is produced by the reaction of 2.1g of ammonium perchlorate?