Answer:
The answer is:
(D) lessen the effect of negative news
Explanation:
In chemistry, a buffer is a solution form by a weak acid and its conjugate base, or a weak base and its conjugate acid that can resist changes in pH when an acid or base is added to it, as it neutralizes them.
So, as it neutralizes the effect of the acid or bases in pH, the chosen answer for the question is that a buffer is to lessen the effect of negative news.
Yes it is. the black ones are electrons as well
The name of the element whose third shell has 2p electrons is neon.
Answer:
40.4 kJ
Explanation:
Step 1: Given data
- Heat of sublimation of CO₂ (ΔH°sub): 32.3 kJ/mol
Step 2: Calculate the moles corresponding to 55.0 g of CO₂
The molar mass of CO₂ is 44.01 g/mol.
n = 55.0 g × 1 mol/44.01 g = 1.25 mol
Step 3: Calculate the heat (Q) required to sublimate 1.25 moles of CO₂
We will use the following expression.
Q = n × ΔH°sub
Q = 1.25 mol × 32.3 kJ/mol = 40.4 kJ
Answer:
The value is
Explanation:
From the question we are told that
The concentration of is
The concentration of is
The concentration of is
The concentration of is
Generally the log of the activity coefficient is mathematically represented as
Here z is the charge which for is +1
is the size which for is
is the ionic strength which is mathematically represented as
=>
So
=>
=>
=>
Generally the pH is mathematically represented as
=>