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natali 33 [55]
3 years ago
15

Calculate the ratio of the velocity of helium atoms to the velocity of neon atoms at the same temperature.

Chemistry
1 answer:
o-na [289]3 years ago
8 0

Answer:

vHe / vNe = 2.24

Explanation:

To obtain the velocity of an ideal gas you must use the formula:

v = √3RT / √M

Where R is gas constant (8.314 kgm²/s²molK); T is temperature and M is molar mass of the gas (4x10⁻³kg/mol for helium and 20,18x10⁻³ kg/mol for neon). Thus:

vHe = √3×8.314 kgm²/s²molK×T / √4x10⁻³kg/mol

vNe = √3×8.314 kgm²/s²molK×T / √20.18x10⁻³kg/mol

The ratio is:

vHe / vNe = √3×8.314 kgm²/s²molK×T / √4x10⁻³kg/mol / √3×8.314 kgm²/s²molK×T / √20.18x10⁻³kg/mol

vHe / vNe = √20.18x10⁻³kg/mol / √4x10⁻³kg/mol

<em>vHe / vNe = 2.24</em>

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I hope it helps!

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Use the molar bond enthalpy data in the table to estimate the value of Δ∘rxn
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Answer:

ΔH°rxn = - 433.1 KJ/mol

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By titration, it is found that 31.7 mL of 0.145 M NaOH(aq) is needed to neutralize 25.0 mL of HCl(aq). Calculate the concentrati
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Answer:

0.184 M

Explanation:

We'll begin by writing the balanced equation for the reaction. This is illustrated below:

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From the balanced equation above, the following data were obtained:

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Next, the data obtained from the question. This includes:

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Divide both side by 25

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Therefore, the molarity of the acid (HCl) is 0.184 M

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