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3 years ago

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A neutral atom possesses an number of 13 and an atomic mass of 27.three electrons are lost.from what region of the atom are they

lost?
A.Outside the atom

B.Outside the nucleus

C. inside the nucleus

D. both inside and outside the nucleus

1 answer:

Pavlova-9 [17]3 years ago

3 0

They are lost from valence shell (it's outermost shell of an atom).

->>> outside the atom

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What five elements make up 99% of living things

MA_775_DIABLO [31]

Answer:

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What is the concentration of the barium hydroxide solution if 50.0 mL of a 0.425 M HNO3 solution is required to neutralize a 36.

fomenos

The molarity of Barium Hydroxide is 0.289 M.

<u>Explanation:</u>

We have to write the balanced equation as,

Ba(OH)₂ + 2 HNO₃ → Ba(NO₃)₂ + 2 H₂O

We need 2 moles of nitric acid to react with a mole of Barium hydroxide, so we can write the law of volumetric analysis as,

V1M1 = 2 V2M2

Here V1 and M1 are the volume and molarity of nitric acid

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Consider the following reaction at constant P. Use the information here to determine the value of Î”Ssurr at 355 K. Predict whet

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The given reaction is as follows:

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Hence, the value of dSsurr is +321.12 J/K

For a reaction to be spontaneous, dG<0,

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It is known that dG = dHsys - TdSsys,

Now let us assume,

dG<0

Also, dStotal = dSsys + dSsurr > 0

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dSsys + dSsurr > 0

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A cube has the following dimensions: 7 cm x 8 cm x 10 cm and has a density of 45 g/cm3. Calculate the mass.

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