Answer:
Explanation:some data are missing are they need experiment??
Before you begin titration, drops of indicator are added to the Erlenmeyer flask. This happens when preparing to measure pH change.
Low air pressure cause it was on my test last year
<u>Answer:</u>
For 1: The correct answer is Option D.
For 2: The correct answer is Option A.
<u>Explanation:</u>
Polar molecules are defined as the of molecules, in which two atoms that combine must be of different element and therefore can create a dipole. For a dipole, there must be a difference in electronegativity and that is achieved when two atoms of different electronegativity combine. The negative dipole or charge is created on the electronegative atom and positive dipole or charge is created on the electropositive atom.
Thus, the correct answer is option D.
Non-polar molecules are defined as the molecules which are formed when two atoms of same element combine, so that a dipole cannot be created. When there is no dipole, there will be no difference in electronegativity and this is achieved when two atoms of same electronegativities combine.
Thus, the correct answer is A.
