Explanation:
The given data is as follows.
= 10 mM = 
M
= 750 ml, 
= 5 ml
= ?
Therefore, calculate the molarity of given NaCl stock as follows.
= 1.5 M
Thus, we can conclude that molarity of given NaCl stock is 1.5 M.
Answer:
C
Explanation:
The Henderson-Hasselbalch equation relates pH to the concentrations of an weak acid-base conjugate pair as follows:
pH = pKa + log([A⁻]/[HA])
For solution 1, the pH may be expressed as follows:
pH = pKa + log(5.0M/5.0M) = pKa
For solution 2, pH may be expressed as follows:
pH = pKa + log(0.050M/0.050M) = pKa
Thus, the pH values are equal to the pKa in both cases and are the same.
The correct answer is atom
The type of chemical bond depends on the substances taking part in it. If the substances are metal and non-metal, then the bond between them is ionic. If two substances are metal, then the bond between them is metallic. If two substances are non-metal, then the bond is covalent.
So basically put this:
Metal + Nonmetal = Ionic
Metal + Metal = Metallic
Nonmetal + Nonmetal = Covalent
