What determines when a system reaches equilibrium? What observations can be made about a system once equilibrium has been established?

Answers

Answer 1

Answer: Equilibrium is achieved when the reaction rate of the forward and backward reaction are equal or the concentrations of the reactants and the products are in an unchanging ratio. Specifically, this system is in a dynamic equilibrium.

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explain why ventilation is very important if there is a risk of exposure to radon gas in your home or school

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Radon is a colorless, odorless, radioactive gas. It is also a leading cause of lung cancer. Ventilation is essential.

When molten material hardens and cools, what type of rock is formed?

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Should be an igneous rock.

How many electron cloud energy levels are present in aluminum?

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i think the answer is three

Using the balanced equation below, how many grams of cesium fluoride would be required to make 73.1 g of cesium xenon heptafluoride?CSF + XeF6 → CsXeF7

Answers

Answer:

27.9 g

Explanation:

CsF + XeF₆ → CsXeF₇

First we convert 73.1 g of cesium xenon heptafluoride (CsXeF₇) into moles, using its molar mass:

Molar mass of CsXeF₇ = 397.193 g/mol

73.1 g CsXeF₇ ÷ 397.193 g/mol = 0.184 mol CsXeF₇

As 1 mol of cesium fluoride (CsF) produces 1 mol of CsXeF₇, in order to produce 0.184 moles of CsXeF₇ we would need 0.184 moles of CsF.

Now we convert 0.184 moles of CsF to moles, using the molar mass of CsF:

Molar mass of CsF = 151.9 g/mol

0.184 mol * 151.9 g/mol = 27.9 g

Which statement best describes the effect of low ionization energies and low electronegativities on metallic bonding? a. The valence electrons are easily delocalized.
b. The valence electrons stay in a single orbital.
c. The valence electrons break free of the crystals.
d. The valence electrons move closer to the nuclei.

Answers

Answer: The valence electrons are easily delocalized. As the ionization energy increases the energy required to remove the valance electrons from the atom also increases. So the valance electrons move closer to the nuclei. But low ionization energy makes the atom to lose valance electrons much easier.

Answer: THE answer is A

Explanation: took the exam

Is freshwater drum a consumer

Answers

Yes, It eats meats and is a bottom feeder. !

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Copper metal (Cu) reacts with silver nitrate (AgNO3) in aqueous solution to form Ag and Cu(NO3)2. An excess of AgNO3 is present. The balanced chemical equation is shown below.Cu + 2AgNO3 ---> Cu(NO3)2 + 2Ag The molar mass of Cu is 63.5 g/mol. The molar mass of Ag is 107.9 g/mol. What mass, in grams, of Ag is produced from reaction of 31.75 g of Cu? 26.95 107.9 215.91 431.82