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3 years ago

1

Chemistry

1 answer:

maria [59]3 years ago

3 0

Answer:

Gas to Solid

Explanation:

A condensation reaction goes from gas to solid

Condensation is a physical change which alters the physical properties of matter particularly the form and state. In a condensation reaction, a gas goes from solid to liquid.

It is the inverse of the sublimation reaction.

It involves the loss in energy by a gas.
When gases lose energy, they become pulled together by attractive forces.
This changes their state to solid with enough loss in energy.

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A chemical factory is making soda ash (NA2CO3) from sodium bicarbonate. The production manager calculates they will make 80 tons

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Answer:

$\boxed{\text{ 93 \%}}$

Explanation:

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3 years ago

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3 years ago

What is the mass of 2N at 0.2829 atm 1.35 L and 25°C

maria [59]

<h3>Answer:</h3>

0.437 g

<h3>Explanation:</h3>

From the question we have;

Pressure of the gas as 0.2829

Volume of the gas as 1.35 L

Temperature of the gas as 25°C

But, K = °C + 273.15

Therefore, temperature of the gas is equivalent to 298.15 K

We are required to calculate the mass of the gas

<h3>Step 1: Number of moles of the gas </h3>

Using the ideal gas equation, PV = nRT , we can determine the number of moles.

R is the ideal gas constant, 0.082057 L.atm/mol.K

Therefore, rearranging the formula;

n = PV ÷ RT

= (0.2829 atm × 1.35 L) ÷ (0.082057 × 298.15 K)

= 0.0156 mole

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Mass = Moles × Molar mass

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Therefore;

= 0.0156 mole × 28.0134 g/mol

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4 years ago

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Answer:

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Explanation:

The complete question is as follows;

is desired to determine the concentration of arsenic in a lake sediment sample by means of neutron activation analysis. The nuclide 75:33 As captures a neutron to form 76:33 As, which in turn undergoes beta decay. The daughter nuclide produces the characteristic gamma rays used for the analysis. What is the daughter nuclide?

solution:

Please check attachment for decay equations and explanations

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3 years ago