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soldi70 [24.7K]
3 years ago
9

What does semi-preamble mean

Chemistry
2 answers:
borishaifa [10]3 years ago
5 0
Do you mean, semi permeable membrane !

so it is a membrane which allow specific group of solute to pass through it !

as an example you can say , plasma membrane is a semi permeable membrane !
enyata [817]3 years ago
3 0
Llowing certain substances to pass through it but not others, especially allowing the passage of a solvent but not of certain solutes.
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Which one of the following will change the value of an equilibrium constant?
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Answer:

(E) changing temperature

Explanation:

Consider the following reversible balanced reaction:

aA+bB⇋cC+dD

If we know the molar concentrations of each of the reaction species, we can find the value of Kc using the relationship:

Kc = ([C]^c * [D]^d) / ([A]^a * [B]^b)

where:

[C] and [D] are the concentrations of the products in the equilibrium; [A] and [B] reagent concentrations in equilibrium; already; b; c and d are the stoichiometric coefficients of the balanced equation. Concentrations are commonly expressed in molarity, which has units of moles / 1

There are some important things to remember when calculating Kc:

-  <em>Kc is a constant for a specific reaction at a specific temperature</em>. If you change the reaction temperature, then Kc also changes

- Pure solids and liquids, including solvents, are not considered for equilibrium expression.

- The reaction must be balanced with the written coefficients as the minimum possible integer value in order to obtain the correct value of Kc

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12.2 scientific notation
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(01.07 но) An experiment was conducted to determine the density of a liquid. The table shows a partial record of the experiment
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Answer:

How do you find the density of a liquid experiment?

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