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tatyana61 [14]
3 years ago
10

A sample that weighs 107.75 g is a mixture of 30% helium atoms and 70% krypton atoms. How many particles are present in the samp

le?
Chemistry
1 answer:
r-ruslan [8.4K]3 years ago
5 0
<span>A sample that weighs 107.75 g is a mixture of 30% helium atoms and 70% krypton atoms. How many particles are present in the sample?    </span>3.59
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ladessa [460]

Answer:D - adding a catalyst

Explanation:

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the standard change in Gibbs free energy is Δ????°′=7.53 kJ/molΔG°′=7.53 kJ/mol . Calculate Δ????ΔG for this reaction at 298 K29
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ΔG = 16.218 KJ/mol

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∴  R = 8.314 J/K.mol

∴ T = 298 K

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If a certain gas occupies a volume of 19 L when the applied pressure is 9.5 atm, find the pressure when the gas occupies a volum
kakasveta [241]

Answer: 37.6 atm

Explanation:

Given that,

Initial volume of gas (V1) = 19L

Initial pressure of gas (P1) = 9.5 atm

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Since pressure and volume are given while temperature remains the same, apply the formula for Boyle's law

P1V1 = P2V2

9.5 atm x 19L = P2 x 4.8L

180.5 atm•L = 4.8L•P2

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180.5 atm•L/4.8L = 4.8L•P2/4.8L

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Quantitative measurements are numerical values, they involve amounts and units like measuring things. Qualitative observations appeal to the five senses, like what does the interaction look and sound like

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2Fe + 3C02<br> 3CO + Fe2O3<br> AH = -24.7 kJ<br> Is the reaction exothermic or endothermic?
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