Answer:
Henderson Hasselbalch equation: pH = pKa + log [salt]/[acid]
You need to know the pKa for acetic acid. Looking it up one finds it to be 4.76
(a). pH = 4.76 + log [0.13]/[0.10]
= 4.76 + 0.11
= 4.87
(b) KOH + CH3COOH =>H2O + CH3COOK so (acid)goes down and (salt)goes up. Assuming no change in volume, you have 0.10 mol acid - 0.02 mol = 0.08 mol acid and 0.13 mol salt + 0.02 mol = 0.15 mol salt
pH = 4.76 + log [0.15]/[0.08]
= 4.76 + 0.27
= 5.03
Answer:
0.95L
Explanation:
Data obtained from the question include:
V1 (initial volume) = 1L
T1 (initial temperature) = 315K
P1 (initial pressure) = 1.10 atm
T2 (final temperature) = stp = 273K
P2 (final pressure) = stp = 1atm
V2 (final volume) =?
Using the general gas equation P1V1/T1 = P2V2/T2, the final volume of the system can be obtained as follow:
P1V1/T1 = P2V2/T2
1.1 x 1/315 = 1 x V2/273
Cross multiply to express in linear form.
315 x V2 = 1.1 x 273
Divide both side by 315
V2 = (1.1 x 273) /315
V2 = 0.95L
Therefore, the final volume of the system if STP conditions are established is 0.95L
0.01068g
Explanation:
Given parameters :
Number of atoms = 5.34 x 10²⁰ atoms
Molar mass of carbon = 12g
Unknown:
Mass of carbon = ?
Solution:
A mole of a substance is unit that contains the Avogadro's number of particles.
1 mole = 6.02 x 10²³ atoms ;
In 5.34 x 10²⁰ ;
Number of moles = 
= 8.9 x 10⁻⁴moles
Mass = number of moles x molar mass = 8.9 x 10⁻⁴ x 12 = 0.01068g
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Molar mass brainly.com/question/2861244
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Answer:
because the number of electrons and protons differs
