Small pieces of copper at 100.0°C are placed in 110.0g of water at 25.0°C in a perfectly insulated calorimeter. The water and copper reach the same final temperature. The initial and final temperatures of the water are shown. The heat capacity of water is 4.18J/(g⋅°C). How much heat is transferred during the experiment?

A 220J

B 230J

C 460J

D 920J

920J

D

What is the chemical formula of the following compound

Agas mixture with a total pressure of 745 mmhg contains each of the following gases at the indicated partial pressures: co2, 245 mmhg ; ar, 119 mmhg ; and o2, 163 mmhg . the mixture also contains helium gas. part a what is the partial pressure of the helium gas? phe p h e = nothing mmhg request answer part b what mass of helium gas is present in a 10.2-l sample of this mixture at 283 k ? m m = nothing g request answer

What is the number of moles in 15.0 g ash3?