B- ammonia. ammonia has a pH level of about 11, and anything higher than 7 is more basic and anything less than 7 is more acidic. 7 is considered neutral.
Explanation:
When mixed together, baking soda and vinegar undergo a chemical reaction. Carbon dioxide, water, and sodium acetate are formed during the reaction.
The value of Kb of the unknown amine is 3.22 x 10^-4.
Weak electrolytes:
The compound which do not dissociate completely when added to the aqueous solution are called weak electrolytes. The electrolyte and its ions exists in equilibrium. In case of weak base, the equilibrium constant is expressed as Kb.
Calculations:
Step 1:
The percentage of amine ionized at equilibrium is 2.2%.
NH3 + H2O ------> NH4+ + OH-
The concentration of conjugate acid at equilibrium is calculated as:
2.2 = (x/0.65) x 100
x = 0.0143 M
Step 2:
The equilibrium constant (Kb) is calculated as:
Kb = x^2/0.65 - x
= (0.0143)^2/(0.65 - x)
= 3.22 x 10^-4
Learn more about weak electrolytes here:
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Answer:
33 Neutrons
Explanation:
Atomic Mass = # of Protons + # of Neutrons
Atomic Number = Proton count
Atomic Mass of Co = 27 Protons + x Neutrons
60 = 27 + x
x = 33
