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gizmo_the_mogwai [7]
4 years ago
14

What volume of 0.125 M HCl is needed to titrate 50.0 mL of 0.0500 M NH3 solution ?

Chemistry
1 answer:
Scrat [10]4 years ago
6 0

Answer:

20

Explanation:

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Which of the following indicates a reaction with a positive ΔG? A. endergonic, spontaneous B. endergonic, not spontaneous C. exe
shtirl [24]

Answer: B. endergonic, not spontaneous

Explanation:

Endergonic reactions are defined as the reactions in which energy of the product is greater than the energy of the reactants. The total energy is absorbed in the form of heat and  \Delta H for the reaction comes out to be positive.

The Gibbs equation is:

\Delta G=\Delta H-T\Delta S

\Delta G= Gibb's free energy change

\Delta H = enthalpy change

T = temperature

\Delta S = entropy change

A reaction is non spontaneous when \Delta G= Gibb's free energy change is positive

+ve=\Delta H-T(-ve)

+ve=\Delta H+ve

\Delta H=+ve

Thus the reaction has to be endergonic.

4 0
3 years ago
Earth has an __of about 30 percent, reflecting much of the sun's radiation<br> back into space.
Aleksandr [31]

Answer: Albedo

Explanation:

((Earth's normal albedo is about 0.3.)))

At the end of the day, around 30 percent of approaching sunlight based radiation is reflected go into space and 70 percent is consumed.

3 0
4 years ago
Which gas law would you use for the following problem: What pressure is required to hold 8.0 moles of oxygen gas in an 8.0 L con
emmainna [20.7K]

Answer:

Ideal Gas Law ( PV = nRT)

Explanation:

Using the Ideal Gas Law, we have; PV = nRT

Where P= Pressure = ?

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            n =  moles = 8.0

            R =  Gas constant = 0.0821 L.atm/mol/K

            T =  80° c + 273 =  353.15K

Therefore Pressure would be;  P = nRT/ V =  8 x 0.0821 x 353.15 / 8 = 28.9atm

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