Which of these elements contains four
valence electrons?
f helium
g beryllium
a carbon
j oxygen

Carbon contain 4 electrons in its valence shell.

Explanation:

Because, total no. of electrons in carbon are 6, so in first shell there are 2 electrons and hence 4 in valence shell.

"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"

the answer is yes

it has kinetic energy

reason

an object has kinetic energy when you stop the force carrying it, the object will stay in motion.

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