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2 years ago

Evaporation is commonly used to concentrate dissolved solids in a liquid feed stream and produce pure water vapor.

Chemistry

1 answer:

Sergio [31]2 years ago

7 0

Answer:

True

Explanation:

Evaporation is the process by which a substance changes its state from liquid to gas. evaporation occurs at all temperatures but it's rate increases as temperature increases.

Pure water vapour can be produced by evaporation.

As the liquids are removed, the solids present in solution becomes more concentrated.

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A barium atom attains a stable electron configuration when it bonds with?

adell [148]

The answer is B. two chlorine atoms.
The chemical formula of the compound is BaCl2~

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2 years ago

During an experiment a thermometer was placed in a beaker containing hydrogen peroxide. The following observations were recorded

Rudiy27

Answer:

Chemical

Explanation:

The change was chemical, because it can no longer be returned to the original form. You cannot get back the bubbles or fizz from the air.

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2 years ago

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An -ate or -ite at the end of a compound name ususally indiates that the compound contains...

Zarrin [17]

Answer: Oxygen.

Explanation: The -ate is used for the ion that has the largest number of Oxygen atoms. The -ite would be used for the ion with the smaller amount of oxygen atoms.

4 0

2 years ago

Solve B in a complete combustion pleaseee

never [62]

Answer:

2 C2H2 + 5 O ---> 4 CO2 + 2 H2O

Explanation:

combustion reactions always end with CO2 + H2O

and you can use this website to balance out equations when you're stuck

https://en.intl.chemicalaid.com/tools/equationbalancer.php?equation=C2H2+%2B+O2+%3D+CO2+%2B+H2O

3 0

2 years ago

An aqueous solution is 4.44 M nitric acid and the density of the solution is 1.42 g/mL. Calculate the mole fraction of this solu

prohojiy [21]

The mole fraction of HNO3 is 0.225

<u>Explanation:</u>

<u>1.</u>Given data

Density = 1.429 /ml

Mass% = 63.01 g HNO3 / 100g of solution

The mass of 63.01 g is in 100 / 1.142 /ml of solution

Or 63.01 g in 55.7 mL

Molarity = 15.39 moles / L

Mass of water in 100g = 100 - 63.01=36.99 g

So 63.01 grams in 36.99 grams of water

So mass of HNO3 in 1000grams of water = 63.01* x 1000 / 36.99 = 1703

Moles of HNO3 in 1000g = 1703 / 63.01 = 27.03 moles

Molality = 27.03 molal (mole / Kg)

Mole fraction = Mole of HN03 / Moles of water + mole of HNO3

Mole of water = 62/ 18 = 3.44

Moles of HNO3 = 63.01 / 63.01 = 1.000

Mole fraction = 1.000 / 3.44 + 1.000 = 0.225

The mole fraction of HNO3 is 0.225

7 0

2 years ago