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2 years ago

How many electrons fit in the part of the third energy level shown

Chemistry

1 answer:

makkiz [27]2 years ago

5 0

Answer:

18 electrons

Explanation:

Note: The third energy level can actually hold up to 18 electrons, so it is not really filled when it has 8 electrons in it.

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Which chemical equation is balanced?

melomori [17]

D. MgO + 2HCI – MgCl2 + H20

<h3>Further explanation</h3>

The chemical equation is said to be balanced if the number of atoms in the reactants is equal to the number of atoms in the product

A. CaO2 + HCl → CaCl2 + H20

atoms O, Cl and H are not the same

B. CO2 + H2O + H2CO2

atoms O are not the same

C. K+ H2O → K20 + H2

atoms K are not the same

D. MgO + 2HCI – MgCl2 + H20

Mg, left = 1, right=1

O, left=1, right=1

H, left=2, right=2

Cl, left=2, right=2

Chemical equation is balanced

6 0

2 years ago

A small sample of methane burns, producing co2 and water vapor. as the hot gas mixture expands, it releases 120.0 kj of heat and

IceJOKER [234]

A small sample of methane burns, releasing 120.0 kJ of heat and doing 830.0 kJ of work. The total energy released is -950.0 kJ.

What is energy?

Energy is a property that is transferred to a physical system, recognizable in the performance of work and in the form of heat and light.

A small sample of methane undergoes combustion. As the hot gas mixture expands, it releases energy (E).

It releases 120.0 kJ of heat. By convention, when heat is released, we assign it a negative sign. Thus, q = -120.0 kJ.
It does 830.0 kJ of work. By convention, when the system does work on the surroundings, we assign it a negative sign. Thus, w = -830.0 kJ.

The change in the energy is the sum of the heat released and the work done.

ΔE = q + w = -120.0 kJ + (-830.0 kJ) = -950.0 kJ

A small sample of methane burns, releasing 120.0 kJ of heat and doing 830.0 kJ of work. The total energy released is -950.0 kJ.

Learn more about energy here: brainly.com/question/13881533

8 0

2 years ago

Do you think crystals formed in conditions that were stable or did they change often?

andreev551 [17]

Answer:

They were made in unstable conditions

Explanation: Im smarty pants

6 0

3 years ago

A strip of copper 370 μm thick and 4.5 mm wide is placed in a uniform magnetic field B with arrow of magnitude 0.30 T, with B wi

777dan777 [17]

Explanation:

The given data is as follows.

Magnetic field (B) = 0.30 T

Current (I) = 24 A

n = $370 \times 10^{-6} m$

charge on electron (e) = $1.602 \times 10^{-19}$ C

Formula to calculate the potential difference is as follows.

V = $\frac{B \times I/d}{n \times e
}$

= $\frac{0.30 T \times 24 amps}{8.47 \times 10^{28} electrons/ m^{3} \times 370 \times 10^{-6} m \times 1.602 \times 10^{-19} C)}$

= $1.38 \times 10^{-6}$ V

Therefore, we can conclude that value of potential difference is $1.38 \times 10^{-6}$ V.

8 0

3 years ago

Suppose a current of is passed through an electroplating cell with an aqueous solution of agno3 in the cathode compartment for s

WARRIOR [948]

The given question is incomplete. The complete question is:

Suppose a current of 0.920 A is passed through an electroplating cell with an aqueous solution of agno3 in the cathode compartment for 47.0 seconds. Calculate the mass of pure silver deposited on a metal object made into the cathode of the cell.

Answer: 0.0484 g

Explanation:

$Q=I\times t$