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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The reaction A + 2B ® products has been found to have the rate law, rate = k[A] [B]2. While holding the concentration of A const

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The rate of the reaction will increase by a factor of 9.

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In this case, considering the given second-order reaction, whose rate law results:

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2 years ago

A solution of h2so4(aq) with a molal concentration of 2.24 m has a density of 1.135 g/ml. what is the molar concentration of thi

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This problem is simply converting the concentration from molality to molarity. Molality has units of mol solute/kg solvent, while molarity has units of mol solute/L solution.

2.24 mol H2SO4/kg H2O * (0.25806 kg H2SO4/mol H2SO4) = 0.578 kg H2SO4/kg H2O

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3 years ago

Please help make sure its correct thanks

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The empirical formula of metal iodide : CoI₃(Cobalt(III) Iodide)

<h3>Further explanation</h3>

13.02 g sample of Cobalt , then mol Co(MW=58.933 g/mol) :

$\tt mol=\dfrac{mass}{Ar}=\\\\mol=\dfrac{13.02~g}{58.933}\\\\mol=0.221$