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jarptica [38.1K]

3 years ago

6

Half-reaction for the reduction of liquid water to gaseous hydrogen in basic aqueous solution

1 answer:

Elena L [17]3 years ago

5 0

Answer:

2H₂O (liq) + 2e⁻⇒ H₂ (g) + 2OH⁻ (aq)

Explanation:

In reduction-oxidation reaction two reactions take place, one is oxidation and the other is reduction reaction. In an oxidation reaction, there is the loss of an electron whereas in the reduction reaction there is gain of electron occus.

Reduction reaction occurs on the cathode, in a reduction of water there is gain of 2 electrons to gaseous hydrogen in basic aqueous solution. half-reaction for the reduction of liquid water to gaseous hydrogen in basic aqueous solution-

2H₂O (liq) + 2e⁻⇒ H₂ (g) + 2OH⁻ (aq)

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1. organisms of different species that share similar characteristics most likely have..

SSSSS [86.1K]

Answer:

1. Parents from both species.

2. Because of natural selection.

Explanation:

6 0

2 years ago

An aqueous solution is 40.0 % by mass hydrochloric acid, HCl, and has a density of 1.20 g/mL. The mole fraction of hydrochloric

vivado [14]

Answer:

The molar concentration of HCl in the aqueous solution is 0.0131 mol/dm3

Explanation:

To get the molar concentration of a solution we will use the formula:

<em>Molar concentration = mass of HCl/ molar mass of HCl</em>

<em></em>

Mass of HCl in the aqueous solution will be 40% of the total mass of the solution.

We can extract the mass of the solution from its density which is 1.2g/mL

We will further perform our analysis by considering only 1 ml of this aqueous solution.

The mass of the substance present in this solution is 1.2g.

<em>The mass of HCl Present is 40% of 1.2 = 0.48 g.</em>

The molar mass of HCl can be obtained from standard tables or by adding the masses of Hydrogen (1 g) and Chlorine (35.46 g) = 36.46g/mol

Therefore, the molar concentration of HCl in the aqueous solution is 0.48/36.46 = 0.0131 mol/dm3

7 0

2 years ago

Balance the chemical equation<br> _CrO3->_Cr2O3+_O2

snow_lady [41]

Answer:

2CrO3-->2Cr2O3--->3O2

7 0

1 year ago

The rate constant for this second‑order reaction is 0.380 M − 1 ⋅ s − 1 0.380 M−1⋅s−1 at 300 ∘ C. 300 ∘C. A ⟶ products A⟶product

Sati [7]

Answer: 8.38 seconds

Explanation:

Integrated rate law for second order kinetics is given by:

$\frac{1}{a}=kt+\frac{1}{a_0}$

$a_0$ = initial concentartion = 0.860 M

a= concentration left after time t = 0.230 M

k = rate constant = $0.380M^{-1}s^{-1}$

$\frac{1}{0.860}=0.380\times t+\frac{1}{0.230 }$

$t=8.38s$

Thus it will take 8.38 seconds for the concentration of A to decrease from 0.860 M to 0.230 M .

5 0

2 years ago

In order to reduce dependence on imported oil, the government of Jalica has imposed minimum fuel-efficiency requirements on all

liubo4ka [24]

Answer:

(B) The Jalican government did not intend the new fuel-eﬁiciency requirement to be a pollution-reduction measure.

Explanation:

What it was expressed is about to reduce dependence on imported oil.

6 0

2 years ago