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3 years ago

Oxygen is produced at the positive electrode

Chemistry

1 answer:

abruzzese [7]3 years ago

5 0

Answer:

See Explanation

Explanation:

In electrolysis, a solution called the electrolyte is decomposed by the passage of direct current through it.

The points through which current enters and leaves the electrolyte are called electrodes. In electrolysis, oxidation occurs at the anode and reduction occurs at the cathode.

In the electrolysis of water; at the anode oxygen is produced as follows;

4OH^-(aq) -----> 2H2O(l) + O2(g) + 4e

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Two carbon atoms cannot be linked to each other by more than three covalent bonds why

Leto [7]

Answer:since,there is a single bond between the two carbon atoms and both share their one atom therefore for completing its shell it need to combine with three atoms of carbon or other element . therefore it cannot be linked to more than 3 covalent bonds since its shell will be completed to become stable .

Explanation:

6 0

3 years ago

Question 23 (1 point)

Sedbober [7]

Answer:

d = 1.53 g/mL

Object will sink into water

Explanation:

Given data:

Mass of object = 14.8 g

Initial volume of water = 25.0 mL

Final volume after adding object = 34.7 mL

Density of object = ?

Density of water = 1.00 g/mL

Solution:

Volume of object = Total volume - volume of water

Volume of object = 34.7 mL - 25.0 mL

Volume of object = 9.7 mL

Density of object;

d = mass/volume

d = 14.8 g / 9.7 mL

d = 1.53 g/mL

The density of water is 1.00 g/mL which means object is heavier than water thus object will sink into the water. The object with density less than water are float in it.

7 0

3 years ago

How many orbitals would mercury (Hg) have?

Tcecarenko [31]

Answer:

6 orbitals

Explanation:

An atom of mercury will have 6 - orbitals because it can be found on the 6-period in the periodic table of elements.

Orbitals or shells are energy levels in which electrons are placed within an atom.

Let us write the shell notation of the element:

Hg has 80 electrons:

K L M N O P

2 8 18 32 18 2

So, we have six orbitals

8 0

3 years ago

From the diagram, when the temperatures of reactants are raised from 20°C to 30°C:

sveta [45]

Answer: D. The number of molecules having Er or greater doubles.

Explanation: As the temperature increases from 20°C to 30°C, the number of molecules with maximum energy decreases, but the number of effective collisions which result into the formation of product doubles.

This is due to doubling of molecules which possess energy equal to or greater than $E_r$ which means now double number of molecules will be able to cross the energy barrier and hence the formation of product increases and hence the rate increases to double.

5 0

4 years ago

Read 2 more answers

Select the correct set of quantum numbers (n, l, ml, ms) for the first electron removed in the formation of a cation for stronti

matrenka [14]

Answer:

5,0,0,-1/2

Explanation:

The quantum numbers are a way to characterize the electrons, and so, identify the region that it's more probable to find it (orbital). They are:

- Principal quantum number (n): represents the shell or level, and varies from 1 to 7, and are represented by the letter K, L, M, N, O, P, and Q.

- Azimuthal quantum number (l): represents the subshell or sublevel, and is represented by 0,1,2,3.., and for the letters s, p, d, f,...

- Magnetic quantum number (ml): represents the orbital. It varies from -l to +l passing by 0. Each orbital can have 2 electrons.

- Spin quantum number (ms): represents the spin of the electron. It can be +1/2 or -1/2.

The strontium has an atomic number equal to 38, by the Linus Pauling's diagram, the electronic distribution is:

1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s²

The valence electron is at the subshell 5s, which has only one magnetic quantum number: 0. Because it has 2 electrons, the first one has spin =1/2, and the other -1/2. So the first electron of the formation of cation has quantum numbers:

n = 5; l = 0; ml = 0; ms = -1/2

7 0

3 years ago