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kotegsom [21]
3 years ago
10

Does the nucleus (protons and neutrons) weigh more than the electrons?

Chemistry
2 answers:
Butoxors [25]3 years ago
3 0
The mass of nucleons (and thus of the nucleus) is roughly 1000 times greater than that of electrons.
vichka [17]3 years ago
3 0
Yes, protons and neutrons weigh much more than electrons. Which is why the mass of an element is the protons and neutrons added together, disregarding the electrons. Their weight is almost negligible.
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A certain first-order reaction has a rate constant of 2.15×10−2 s−1 at 20 ∘C. What is the value of k at 55 ∘C if Ea = 72.0 kJ/mo
adell [148]

Answer:

k_2=0.504s^{-1}

Explanation:

Hello there!

In this case, according to the given information, it turns out possible for us to calculate the rate constant at 55 °C by using the temperature-variable version of the Arrhenius equation:

ln(\frac{k_2}{k_1} )=-\frac{Ea}{R}(\frac{1}{T_2} -\frac{1}{T_1} )

Thus, we plug in the temperatures, activation energy and universal constant of gases in consistent units to obtain:

ln(\frac{k_2}{0.0215s^{-1}} )=-\frac{72000\frac{J}{mol}}{8.3145\frac{J}{mol*K}}(\frac{1}{55+273} -\frac{1}{20+273} ) \\\\ln(\frac{k_2}{0.0215s^{-1}} )=3.154\\\\k_2=0.0215s^{-1}exp(3.154)\\\\k_2=0.504s^{-1}

Regards!

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Explanation:

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g Where, approximately, is the negative pole on each of these molecules? Lewis structure for C O F 2. A central C atom is single
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