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2 years ago

What is released when an electron loses energy?

Chemistry

1 answer:

MakcuM [25]2 years ago

5 0

It absorbs the quants of energy the photon was carrying and moves higher

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What element is Column 1, period 3

Finger [1]

Answer:

Sodium (Na)

Explanation:

The element on the periodic table at Column (group) 1, period 3 is Sodium (Na)

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2 years ago

Study the diagram.

Yanka [14]

It’s forming An Hurricane

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2 years ago

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A balloon contains 8.4 L of helium gas at STP. How many moles of helium are in the balloon? 0.38 moles He ,190 moles He ,2.1 mol

damaskus [11]

Answer:

0.38 moles He

Explanation:

from the ideal gas law PV= nRT you can calculate the volume of 1 mole at STP (273..1K and 1 atm of pressure) the MOLAR VOLUME IS

22.4 L

In the problem you have 8.4L

8.4 L/22.4 L=0.375 moles

0.38 moles He

8 0

1 year ago

Membrane Conductance You are doing a measurement to determine the conductance of an artificial membrane. The membrane is selecti

Ilia_Sergeevich [38]

Answer:

g = 1.11x10⁻⁵Ω.

Explanation:

The membrane conductance (g) can be calculated by dividing membrane current (I) through the driving force (Vm - E) as follows:

$g_{ion} = \frac{I_{ion}}{V_{m} - E_{ion}}$

where Vm: is the membrane potential and $E_{ion}$ : is the equilibrium potential for the ion or reversal potential.

The equilibrium potential for the ion can be calculated using the Nernst equation:

$E_{ion} = \frac{RT}{zF}*Ln(\frac{[ion]_{out}}{[ion]_{ins}})$

where R: is the gas constant = 8.314 J/K*mol, F: is the Faraday constant = 96500 C/mol, T: is the temperature (K), z: is the ion's charge, [ion]out and [ion]ins: is the concentration of the ion outside and inside, respectively.

$E_{ion} = \frac{(8.314 J*K^{-1}*mol^{-1})((15 + 273)K)}{(+1)(96500 C*mol^{-1})}*Ln(\frac{[500mM]}{[70mM]}) = 48.78 mV$

Now, we can calculate the membrane conductance (g) using equation (1):

$g_{ion} = \frac{I_{ion}}{V_{m} - E_{ion}} = \frac{-318*10^{-9} A}{20*10^{-3} V - 48.78*10^{-3} V} = 1.11*10^{-5} \Omega$

Therefore, the membrane conductance is 1.11x10⁻⁵Ω.

I hope it helps you!

5 0

2 years ago

What is a precipitate?

11111nata11111 [884]

According to the glossary in the back of 'Chemistry: A Central Science - Twelfth Edition', a precipitate is "An insoluble substance that forms in, and separates from, a solution."

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2 years ago