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4 years ago

A liquid is placed in an evacuated, sealed flask. When will this closed system reach dynamic equilibrium?

Chemistry

2 answers:

PilotLPTM [1.2K]4 years ago

8 0

Answer:

When the rate of evaporation equals the rate of condensation

Explanation:

In a dynamic equilibrium the rate of the forward reaction is equal to the rate of the backward reaction. In evaporation liquid is converted to gas phase and in condensation the gas or vapor is converted to the liquid phase. So dynamic equilibrium is reached when the rate of evaporation equals the rate of condensation.

Colt1911 [192]4 years ago

7 0

If we ignore temperature equilibrium (since no data given), then dynamic equilibrium when the rate of evaporation equals the rate of condensation over a finite period of time and under constant temperature.

This is because at *dynamic* equilibrium, evaporation and condensation are both taking place continuously. If the rates are equal, then the mass of vapour and mass of liquid phases do not change, hence equilibrium. Dynamic because changes are still taking place.

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Consider the following properties: I) The red color of rubies is due to the presence of chromium ions. II) Objects made of silve

quester [9]

Answer:

II) Objects made of silver become tarnished.

Explanation:

Physical properties are the properties which can be observed without changing identity of substance.

Chemical properties are the properties which describe how the substance changes into the different substance completely.

Boiling is an example of physical change in state of the substance. Color is also an example of physical property like boiling point and hence these are constants. The reason of the color is that the chromium ions shows certain colors as the electrons are excited due to absorption of the light. The tarnishing of the silver is an example of the chemical change which occurs due to the reaction of the silver with oxygen. This is also known as corrosion.

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4 years ago

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kkurt [141]

Answer:

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3 years ago

Read 2 more answers

How many moles of ammonium nitrate are there in 32.5 mL of a0.125 M NH4NO3 solution?

Nady [450]

Answer: The number of moles of ammonium nitrate is 0.004 moles.

Explanation:

To calculate the number of moles for given molarity, we use the equation:

$\text{Molarity of the solution}=\frac{\text{Moles of solute}\times 1000}{\text{Volume of solution (in mL)}}$

We are given:

Molarity of $NH_4NO_3$ solution = 0.125 M

Volume of solution = 32.5 mL

Putting values in above equation, we get:

$0.125M=\frac{\text{Moles of }NH_4NO_3\times 1000}{32.5mL}\\\\\text{Moles of }NH_4NO_3=0.004mol$

Hence, the number of moles of ammonium nitrate is 0.004 moles.

8 0

3 years ago

1 which equation demonstrates the law of conservation of mass?

Mrac [35]

Every balanced chemical reaction demonstrates the law of conservation of mass where the reactants have the same number of atoms as the products. For example, the production of ammonia gas.
N2 (g) + 3H2 (g) -> 2NH3 (g) you can see that there are two nitrogen atoms and six hydrogen atoms on both sides of the equation.

5 0

3 years ago

Henry’s law is important in environmental chemistry, where it predicts the distribution of pollutants between water and the atmo

lina2011 [118]

Answer:

Explanation:

Henry's law states that the amount of dissolved gas in a liquid is proportional to its partial pressure above the liquid

number of moles of cyclopropane = 1.84 g / 42.08 g/mol = 0.044 mol

number of mole of water = 1010000 g / 18.02 g/mol = 56048.83 mol

mole fraction of cyclopropane = mole of cyclopropane / ( mole of water + mole of cyclopropane) = 0.044 mol / 56048.87 = 7.85 × 10⁻⁷

P cyclopropane = k henry × mole fraction of cyclopropane = 4273 atm × 7.85 × 10⁻⁷ = 0.00335 atm

b) number of cyclopropane molecules present in each cubic centimeter = ( 0.044 mol / 1010) × 6.022 × 10 ²³ / 1000 cm³ = 2.623 × 10 ¹⁶ molecules in cm³

8 0

3 years ago