The molar heat of vaporization of water is 40.7 kl/mol. how much heat must be absorbed to convert 50.0 grams of liquid water at 100 degrees celsius?
a) 1.46 x 10kl
b) 1.13 x 10^2 kl
c) 2.04 x 10^3 kl
d) 3.66 x 10^4 kl

The table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 10 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.

Which metal exist in liquid state and can be cut with knife ?

Calculate the molarity of each of the following solutions. part a) 0.12 mol of lino3 in 5.5 l of solution part b) 60.7 g c2h6o in 2.48 l of solution part c) 14.2 mg ki in 100 ml of solution