Question 13 Which of the following states the law of conservation of mass?
A
In a chemical reaction, two compounds combine to form a new compound,
Ов
In a chemical reaction, atoms ars rearranged, and some join new molecules,
С
Mass cannot be created or destroyed in a chemical reaction,
D
Energy is neither created nor destroyed in a chemical reaction.
K

On a mild saturday morning while people are working inside, the furnace keeps the temperature inside the building at 23degreesc. at noon the furnace is turned off, and the people go home. the temperature outside is a constant 16degreesc for the rest of the afternoon. if the time constant for the building is 3 hr, when will the temperature inside the building reach 18degreesc? if some windows are left open and the time constant drops to 2 hr, when will the temperature inside reach 18degreesc?