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Korolek [52]
3 years ago
14

If the pressure, volume, and the number of moles of a gas are known, which is needed to calculate the universal gas constant fro

m the ideal gas law?
Chemistry
1 answer:
umka21 [38]3 years ago
7 0

Answer:

5

Explanation:

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During the formation of a chemical bond between two hydrogen atoms, which of the following statements is always true?
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A) Energy is released during the formation of the bond.

Explanation:

During the formation of a chemical bonds between two hydrogen atoms, energy is always released during the formation of this bond type.

Bond formation process is usually exothermic and energy is released during the formation of the bond.

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How many molecules are present in 4.5<br> moles of H2O?
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Nuclear decay<br>27Al + He 》 39P<br>​
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We can insert the subscripts, because these are the atomic numbers of the elements

_{13}^{27}\text{Al} + \, \rm _{2}\text{He} \longrightarrow \, _{15}^{31}\text{P}

That leaves only the superscript of He to be determined,

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_{13}^{27}\text{Al} + \, \rm _{2}^{4}\text{He} \longrightarrow \, _{15}^{31}\text{P}

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