M(NaCl)=50.0 g
m(H₂O)=150.0 g
m(solution)=m(NaCl)+m(H₂O)
w(NaCl)=100m(NaCl)/m(solution)=100m(NaCl)/{m(NaCl)+m(H₂O)}
w(NaCl)=100*50.0/(50.0+150.0)=25%
Answer
there is 2 electrons on that atoms
Explanation:
Oxygen is more <u>electronegative</u> than Hydrogen
So . . .
When the two form covalent bonds, oxygen pulls the electrons closer and farther from hydrogen
So . . .
The water molecule is <u>polar</u>, with oxygen more negative and hydrogen more positive.
So . . .
Since opposites attract, the more negative oxygens attract the more positive hydrogens of other water molecules, forming the <u>hydrogen bonds.</u>
The increase in the average kinetic energy of the molecules needs the increase of temperature. The relation of ℃ and K is n ℃ = m K -273. So if we change all the K unit to ℃ unit, we can get the answer is (1).
