400cm³ of dry air was passed over heated copper powder in a hard glass tube until no further change. What volume of remained at the end of the experiment?mm

"standard molar enthalpy:

h2o ( liquid water ) : - 285.8 kj/mole

h2o ( water vapor ) : - 241.8 kj / mole.

δhrxn = - 241. 8 - ( - 285.8 )= -241.8 + 285.8 = 44.0

answer: 44.0 kj"

because u need two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei to form isotopes.

so since they all have the same shape? i mean maybe because m& m and reeses are both chocolates

because of all the things that happen around the us, many people get into arguments which sadly could get physical, but we should actually make a change for that.

your answer is c) plasma

~*"auba14"*~