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4 years ago

What differs from between a radioactive isotope and a stable isotope

1 answer:

7 0

A stable isotope has just the right number of neutrons for the number of protons (the n:p ratio) to hold the nucleus together against the repulsions of the protons.

A radioactive isotope has either too few or too many neutrons for the nucleus to be stable,

The nucleus will then emit alpha, beta, or gamma radiation in an attempt to become more stable.

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Red wavelengths are ____ theb blue wavelengths

Alex_Xolod [135]

Answer:

stronger/ brighter, thats why red is first on the rainbow

Explanation:

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3 years ago

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Is the following chemical equation balanced? 4Al + 3O2 2Al2O3 yes no

PolarNik [594]

Answer:

Yes!

Explanation:

4Al + 3O2 -> 2Al2O3

4 Al's on the left side

6 O's on the left side

4 Al's on the right side

6 O's on the left side

This is balanced! Let me know if you need help with any other equations.

4 0

3 years ago

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Ethanol, C2H6O, is most often blended with gasoline - usually as a 10 percent mix - to create a fuel called gasohol. Ethanol is

ch4aika [34]

Answer:

4054 kcal of heat is released during complete combustion of 354 g of octane.

Explanation:

Heat of combustion of 1 mol of octane is $1.308\times 10^{3}$ kcal

Molar mass of octane = 114.23 g/mol

We know, no. of moles = (mass)/(molar mass)

So, $1.308\times 10^{3}$ kcal of heat is released during complete combustion of 114.23 g of octane.

So, amount of heat is released during complete combustion of 354 g of octane = $(\frac{1.308\times 10^{3}}{114.23})\times 354$ kcal = 4054 kcal

Hence 4054 kcal of heat is released during complete combustion of 354 g of octane.

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3 years ago

Identify the reaction type of the chemical reaction below. Check all that apply.

Ilya [14]

Answer:

The type of reaction is a single-replacement reaction.

Explanation:

Mg switches places with H, leaving H by itself.

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3 years ago

What is balance equation

satela [25.4K]

Search it up on google

7 0

4 years ago

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