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Paladinen [302]
3 years ago
14

What is number 1 for b, c, and d?

Chemistry
1 answer:
SVETLANKA909090 [29]3 years ago
4 0
B because....................
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Like all equilibrium constants, the value of Kw depends on temperature. At body temperature (37°C), Kw = 2.4 * 10-14. What are t
Aleksandr [31]

Answer:

pH = 6.8124

Explanation:

We know pH decreases with increase in temperature.

At room temperature i.e. 25⁰c pH of pure water is equal to 7

We know

Kw = [H⁺][OH⁻]...............(1)

where Kw = water dissociation constant

At equilibrium [H⁺] = [OH⁻]

So at 37⁰c i.e body temperature Kw = 2.4 × 10⁻¹⁴

From equation (1)

[H⁺]² = 2.4 × 10⁻¹⁴

[H⁺] = √2.4 × 10⁻¹⁴

[H⁺] = 1.54 × 10⁻⁷

pH  = - log[H⁺]

      = - log{1.54 × 10⁻⁷}

      = 6.812

5 0
2 years ago
There is a meme in the image i have what does it mean
Gelneren [198K]

Answer:

The 4s2 is preventing 3d10 from following 1s2 2s2 2p6 3s2 3p6.

Explanation:

the meme is quite common.

5 0
3 years ago
Read 2 more answers
A 0.25-mol sample of a weak acid with an unknown Pka was combined with 10.0-mL of 3.00 M KOH, and the resulting solution was dil
Masteriza [31]

Answer : The value of pK_a of the weak acid is, 4.72

Explanation :

First we have to calculate the moles of KOH.

\text{Moles of }KOH=\text{Concentration of }KOH\times \text{Volume of solution}

\text{Moles of }KOH=3.00M\times 10.0mL=30mmol=0.03mol

Now we have to calculate the value of pK_a of the weak acid.

The equilibrium chemical reaction is:

                          HA+KOH\rightleftharpoons HK+H_2O

Initial moles     0.25     0.03        0

At eqm.    (0.25-0.03)   0.03      0.03

                     = 0.22

Using Henderson Hesselbach equation :

pH=pK_a+\log \frac{[Salt]}{[Acid]}

pH=pK_a+\log \frac{[HK]}{[HA]}

Now put all the given values in this expression, we get:

3.85=pK_a+\log (\frac{0.03}{0.22})

pK_a=4.72

Therefore, the value of pK_a of the weak acid is, 4.72

7 0
3 years ago
Match the terms to the correct 
Nadusha1986 [10]
This type of energy travels through vibrations on waves = 7. sound energy

This is the energy found in the nucleus of an atom = 9. nuclear energy

This type of energy can be transferred in three different ways = 6. thermal energy

This is the term used when energy changes from one form to another = 10. energy conversions

This has to do with the speed of an object and how much mass it has = 2. kinetic energy

This can be either kinetic or potential and has to do with the energy of position and motion of an object = 1. mechanical energy

This type of energy is stored energy = 3. potential energy

This is radiant energy from the sun = 5. light energy

This is energy that is transferred by the movement of electrons through a conductor = 4. electrical energy 

This type of energy is often found in things like batteries or food = 8. chemical energy

hope this helps
6 0
3 years ago
Read 2 more answers
[HCN]=0.09974 M<br> Kp=7.52<br> Calculate the partial pressure of HCN ?
kvv77 [185]

Answer:

i don't understand

Explanation:

6 0
2 years ago
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