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3 years ago

Please help me ASAP State 2 uses of a retortstand according to Chemistry

Chemistry

1 answer:

skad [1K]3 years ago

6 0

Answer:

2 uses of retort stand:

Retorts are used for distillation experiments (such as organic distillations) and titrations (where they hold a burette).
They are also used as supports in filtration.

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Help please. Where do I begin?... Lithium iodide has a lattice energy of −7.3×102kJ/mol and a heat of hydration of −793kJ/mol. F

earnstyle [38]

For the answer to the answer above, the excess energy must be absorbed to overcome the lattice energy, and then energy is released as the ions are hydrated.

So, the heat of solution =is+7.3X10^2 kJ/mol - 793 kJ/mol =
So the answer is
-63 kJ/mol

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3 years ago

Which subatomic particle is electrically neutral and found in the nucleus of an atom?

tangare [24]

The neutron is electrically neutral.

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3 years ago

How would describe the characteristics of the urine

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Urine has the color of pale yellow to deep amber. It is odorless and has a pH of 4.5-8.0

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2 years ago

A gas mixture being used to simulate the atmosphere of another planet at 23°c consists of 337 mg of methane, 148 mg of argon, an

Karolina [17]

The total pressure of the mixture is 65.5 kPa.

According to Dalton's Law of Partial Pressure,

The partial pressure of gas = Mole fraction of gas × Total pressure

Total Pressure = Sum of all the gases partial pressures

The number of moles of methane is,

$Moles \: of \: methane \: (16 g/mol) = 337 \: mg \times \frac{1 g}{1000 mg} \times \frac{ 1 mol}{16 g }$

= 0.021 mols

The moles of methane are 0.021 mols.

The number of moles of the argon,

$Moles \: of \: argon (40 g/mol) = 148 \: mg \times \frac{ 1 g}{1000 mg } \times \frac{ 1 mol}{40 g}$

= 0.003 mols

The number of moles of argon is 0.003 mols.

The number of moles of nitrogen is,

$Moles \: of \: nitrogen (28 g/mol) = 296 \: mg \times \frac{ 1 g}{1000 mg} \times \frac{ 1 mol/}{28 g}$

= 0.010 mols

The number of moles of nitrogen is 0.010 mols.

The total number of moles is,

= 0.021 + 0.003 + 0.010

= 0.034 mols

$Mole \: fraction = \frac{ Moles \: of \: solute }{Total \: number \: of \: moles \: of \: soulte \: and \: solvent}$

$= \frac{ 0.010 }{ 0.034}$

= 0.29

$0.29 \: P _{total} = 19 \: kPa$

$P _{total} = \frac{ 19 \: kPa }{0.29}$

= 65.5 kPa

Therefore, the total pressure of the mixture is 65.5 kPa.

To know more about Dalton's law, refer to the below link:

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1 year ago

Carbon and oxygen combine to form carbon dioxide. What are the products, or what

Vladimir [108]

<h3>Answer:</h3>

Carbon dioxide

<h3>Explanation:</h3>

During chemical reactions elements or compounds that combine to form other new compounds are known as reactants
The newly formed compounds or molecules after a reaction has taken place are known as products.

In this case;

The chemical reaction between carbon and oxygen results to the formation of carbon dioxide.
The equation for the reaction is; C + O₂ → CO₂
Therefore, carbon and oxygen are the reactants while carbon dioxide is the product.

6 0

3 years ago

Please help me ASAP State 2 uses of a retortstand according to Chemistry​

Please help me ASAP State 2 uses of a retortstand according to Chemistry