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Arturiano [62]
3 years ago
15

How many elements does the periodic table have quick my wifi not working help please

Chemistry
1 answer:
dlinn [17]3 years ago
3 0
There is 118 elements<span> in the periodic table</span>
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Calculate the pH of a solution that is 0.205M benzoic acid and 0.230M sodium benzoate, a salt whose anion is the conjugate base
pickupchik [31]

Answer:

pH = 4.25

Explanation:

A solution composed of a weak acid and its conjugate base is a <em>buffer solution</em>. To calculate the pH of a buffer solution we use the Henderson-Hasselbach equation:

pH = pKa + log ([conjugate base]/[weak acid]

In this case, we have the following data:

[conjugate base] = [sodium benzoate] = 0.230 M

[weak acid] = [benzoic acid] = 0.205 M

The pKa of benzoic acid is 4.2. So, we introduce the data in the equation:

pH = 4.2 + log (0.230 M/0.205 M) = 4.2 + 0.050 = 4.25

4 0
3 years ago
Which of these is a benefit of nuclear fusion?
dybincka [34]

Answer:

B. There is a lower risk of runaway chain reactions.

Explanation:

Ap Ex Confirmed

8 0
2 years ago
4.True or false. P(E) + P(Ec) = 1.
iogann1982 [59]
4.) True: 
Since
P(E) = 1 - P(Ec)
P(E)+P(Ec)=1 
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4 0
3 years ago
Which form of oxygen (solid,liquid or gas) would have the highest temperature
ElenaW [278]

Answer:

drip drip water splash (gas)

Explanation:

8 0
3 years ago
Question 1. Considering the reaction of the decomposition of N2O5 to form the products NO2 and O2, calculate the average reactio
GalinKa [24]
<span>
 </span><span> average reaction rate </span><span>= change in concentration / change in time
by putting values we have

 = (1.00M - 0.987M) / (4.00s - 0.00s)
 = 3.25x10^-3 mol/Lsec
this is our conclusion
hope this helps</span>
7 0
3 years ago
Read 2 more answers
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