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3 years ago

Please help me anddont give wrong answer !!!

Chemistry

2 answers:

Free_Kalibri [48]3 years ago

7 0

Solubility of both Carbon Dioxide and Oxygen decreases as temperature increases. This is happening because both gas molecules have higher energy with the temperature rise and less of them will remain disolved in water.

Veseljchak [2.6K]3 years ago

5 0

solubility of CO2 decreases as water temperature increases. tis cuz' CO2 molecules get heated up w water. they move faster when heated n more OC2 molecules leave the water n its solubility decreases.

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Methane undergoes combustion. Which products form?

Aleksandr [31]

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the balanced chemical equation for the reaction is : -

CH4 + 2 O2 =》CO2 + 2 H2O

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ivolga24 [154]

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2 years ago

This question has multiple parts. Work all the parts to get the most points. An aqueous antifreeze solution is 39.0% ethylene gl

nlexa [21]

Answer:

Molality = 10.300 m

Molarity = 6.5970 M

mole fraction = 0.156549

Explanation:

39.0 % = ethylene glycol

61.0 % = water

imagine the total mass = 100g

39.0% ethylene glycol = 39g

61.0 % water = 61g

1) Molality = number of moles / mass of solvent (kg)

Molar mass of ethylene glycol = 62.07g/mole

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Molality = moles / mass of solvent = 0.6283 moles / 0.061kg = 10.300 m

2) Molarity = number of moles / volume of solution

Since we know the density of the solution = 1.05g /ml

⇒ volume = 100g / 1.05g /mL = 95.24 mL = 0.09524 L

Molarity = 0.6283 moles / 0.09524 L = 6.5970 M

3) Mole fraction

moles water = 61g / 18.02g/mole = 3.38513 moles

Total number of moles = moles of ethylene glycol + moles of water = 0.6283 + 3.38513 = 4.0134276 moles

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