Which of the following best explains why the bond in a molecule of hydrochloric acid (HCl) is polar covalent?

Question 33
Which of the following best explains why the bond in a molecule of hydrochloric acid (HCl) is polar covalent?
A. Hydrogen does not have any neutrons in its nucleus.
B. The pH of hydrochloric acid is between zero and one.
C. Chlorine has a greater electronegativity value than hydrogen.
D. Both chlorine and hydrogen are gases under standard conditions.
Question 34
What will be the product(s) of a combustion reaction in which the reactants are C2H4O + O2?
A. C2H4O + O2
B. C2H4O + H2O
C. 2 CO2 + 2 H2O
D. 2 CO + 3 H2O
Question 35
How may astronomers use electromagnetic radiation data to determine the temperature of a celestial object?
A. By observing how its radiation is affected by nearby celestial objects
B. By comparing its spectral lines with the known spectra of various atoms and molecules
C. By noting where splitting occurs in its spectral lines and the degree of splitting
D. By identifying the wavelength at which its radiation peaks to a blackbody energy curve