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Furkat [3]
4 years ago
8

Choose the correct statement. Ammonia is a strong base. HCl is a strong base. Water is a strong acid. HCO3 is a strong acid.

Chemistry
2 answers:
yuradex [85]4 years ago
6 0
The answer is that HCO3 is a strong acid
Pepsi [2]4 years ago
5 0
The last one in the list, HCO3 is a strong acid
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When a system is at equilibrium________.
ikadub [295]

Answer:

The forward and the reverse processes are both spontaneous. (Ans. B)

Explanation:

When a system is at equilibrium state, then the rate of backwards, and forward, both reactions becomes equal. Which means the forward and the reverse processes are both spontaneous.

With the help of entropy change of the reaction, and Gibbs free energy we can determine the spontaneity of a reaction. If entropy changes is positive, and Gibbs free energy changes a negative, then the reaction will say to be spontaneous.

5 0
3 years ago
The equation for photon energy, E, is E=hc/λ
Leni [432]

Answer:

The wavelength, λ, of a photon that has an energy of E = 3.92×10⁻¹⁹ J is 5.054*10⁻⁷ m

Explanation:

The wavelength is defined for every periodic wave, that is, for the type of wave that repeats itself with exactly the same shape every given interval of time. It is the distance between two points from which the wave repeats.

Radiation is the emission, propagation and transfer of energy in any medium in the form of electromagnetic waves or particles.

The energy carried by electromagnetic radiation travels by waves. This energy is transmitted grouped in small "quanta" of energy called photons. The energy of a photon is measured in Joules (J) and is

E=\frac{h*c}{wavelength}

Being:

  • E=3.92×10⁻¹⁹ J
  • h= 6.626×10⁻³⁴ J⋅s (Planck's constant)
  • c = 2.99×10⁸ m/s (the speed of light)
  • wavelength=?

and replacing:

3.92*10^{-19}J =\frac{6.626*10^{-34}J.s*2.99*10^{8}\frac{m}{s}   }{wavelength}

you get:

wavelength =\frac{6.626*10^{-34}J.s*2.99*10^{8}\frac{m}{s}   }{3.92*10^{-19}J}

wavelength= 5.054*10⁻⁷ m

<u><em>The wavelength, λ, of a photon that has an energy of E = 3.92×10⁻¹⁹ J is 5.054*10⁻⁷ m</em></u>

6 0
3 years ago
What is the molarity of a solution that contains 12 moles of solute and 583 ml of solution?
frozen [14]

Answer:

21 M

Explanation:

Molarity = mol solute/ L solution = 12 mol/0.583 L  ≈ 21 mol/L = 21 M

5 0
3 years ago
How much would 400. jelly beans weigh in grams?
Ulleksa [173]

Answer:

453 or 453.592

Explanation:

400 jellybeans are about a pound and a pound is 453.592 grams

6 0
3 years ago
Why is innate immunity not always effective?
rewona [7]
I believe it is d hope this helps :)
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2 years ago
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