Answer:
0.0957 M
Explanation:
Equivalence appears to occur upon addition of 20 mls of 0.0957 M HCl.
0.02 L x 0.0957 mole/L = 0.001914 moles HCl added
CH3NH3 + HCl ==> CH3NH4^+ Cl^-
Molarity of CH3NH3 initially present = 0.0957 M
pH < 7 because the reaction is between a strong acid (HCl) and a weak base (methylamine)
I believe the answer would be A. Electronegativity increases across a period.
All of the above.
The properties of water are:
1) polar molecules
2) regulates temperature
3) universal solvent
4) high surface tension
5) can exist in all three stages of matter