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dybincka [34]
4 years ago
10

Given the following values of pKa, determine which is the weakest base of the answers listed. Acid pKa HClO2 1.95 HClO 7.54 HCOO

H 3.74 HF 3.17 HNO2 3.15
Chemistry
1 answer:
professor190 [17]4 years ago
4 0

Answer:

HClO 7.54

Explanation:

Hypochlorous acid (HClO) is a weakest acid because the pKa value of Hypochlorous acid is very high among the options given in the activity. pKa is a method which is used in order to identify the strength of an acid. The higher the value of pKa of a liquid, lower the strength of an acid while lower the value of pKa of chemical, higher the strength of an acid. In the options, HClO2  is a strong acid due to high lower pKa value.

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A base produces OH-1 ions when dissolved in solution<br> . True<br> . False
lisov135 [29]

Answer:

i think its true

Explanation:

4 0
3 years ago
Which equation is used to help form the combined gas law?
kkurt [141]

Answer:

The ideal gas equation

Explanation:

The ideal gas equation is derived from the combination of three gas laws:

  • Boyle's law
  • Charles's law
  • Avogadro's law.

The ideal gas law is expressed mathematically as: PV=nRT where:

P is pressure

V is volume

n is the number of moles

R is the ideal gas law

T is temperature.

To obtain the combined gas law, we assume that n=1 and this gives:

                       \frac{PV}{T} = R

Therefore:

\frac{P_{1} V_{1} }{T_{1} } = \frac{P_{2} V_{2} }{T_{2} }

5 0
3 years ago
Predict which of the following changes will cause the volume of the balloon to increase or decrease assuming that the temperatur
IrinaVladis [17]

Answer:

1. a

2. a

3. b

4. c

Explanation:

The STP is the Standard conditions of Temperature and Pressure, in these conditions, T = 0°C and P = 1 atm. By the ideal gas law,

PV = nRT

Where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature.

We can observe that pressure and volume are indirect proportional, so when one increase, the other decrease. so:

1. The pressure decreases from 1.15 atm to STP, 1 atm, thus the volume increases.

2. The pressure decreases from STP, 1 atm, to 0.5 atm, thus the volume increases.

3. The pressure increases from STP, 1 atm, to 1.25 atm, thus the volume decreases.

4. The pressure remains constant at 1 atm, thus the volume is unchanged.

7 0
3 years ago
The decomposition of nitramide in aqueous solution at 25 °C NH2NO2(aq)N2O(g) + H2O(l) is first order in NH2NO2 with a rate const
HACTEHA [7]

Answer:

[NH_2NO_2]=0.0868M

Explanation:

Hello,

In this case, for the given chemical reaction, the first-order rate law is:

r=\frac{d[NH_2NO_2]}{dt} =-k[NH_2NO_2]

Which integrated is:

[NH_2NO_2]=[NH_2NO_2]_0exp(-kt)

Thus, the concentration after 31642.0 s for a 0.384-M solution is:

[NH_2NO_2]=0.384M*exp(-4.70x10^{-5}s^{-1}*31642.0s)\\

[NH_2NO_2]=0.0868M

Best regards.

6 0
3 years ago
Read 2 more answers
Using the phase diagram for water, what phase is water at 0.01 degrees Celsius and 0.0060 atmospheres?
anzhelika [568]
<span>Answer: at 0.01 °C and 0.0060 atm the three phases (solid, liquid and gas)
</span><span>
</span><span>
</span><span>Explanation:
</span><span>
</span><span>
</span><span>1) Water at 0.0060 atm and 0.01° C is at its triple point.
</span>

2) The triple point is the point in the phase diagram at which the three physical states coexist: gas, liquid and solid.

3) That means that water can freeze and boil at the same time. In fact they can happen any of the six changes of phase: freezing (liquid to solid), melting (solid to liquid), evaporation (liquid to gas), condensation (gas to liquid), sublimation (solid to gas), and deposition (gas to solid).

The phase diagram is unique for any substance, meaning that it is different for different substances: the normal boiling and melting points are different.
8 0
4 years ago
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