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3 years ago

PLEASE HELP

Chemistry

1 answer:

lozanna [386]3 years ago

5 0

Answer:

The Answer is A

Explanation:

particles in gas much like any other particles vibrate. but gas is moving constantly so the answer would be A

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Mg(OH)2 is a sparingly soluble compound, in this case a base, with a solubility product, Ksp, of 5.61×10−11. It is used to contr

VLD [36.1K]

Answer:

1.27 x 10⁻⁴M

Explanation:

For a 2 to 1 ionization ratio, solubility in pure water can be calculated using the formula S = ∛(Ksp/27) = ∛(5.61 x 10⁻¹¹/27 = 1.27 x 10⁻⁴M.

Mg(OH)₂ ⇄ Mg⁺² + 2OH⁻ => Ksp = [Mg⁺²][OH⁻]² = (x)(2x)² = 4x³

Solve for 'x' => x = Solubility = ∛Ksp/4

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4 years ago

The activation energy of an endothermic reaction

yarga [219]

Answer:

The activation energy of an endothermic reaction

A) must be greater than the required △H

Explanation:

endothermic reaction : Are those which absorbs heat from the surrounding

.This energy provide activation energy for the reaction to occur.

So activation energy becomes more than enthalpy.

7 0

4 years ago

For some transformation having kinetics that obey the Avrami equation (Equation 11.17), the parameter n is known to have a value

Alex787 [66]

Answer:

t ≈ 235.47 secs

Explanation:

Calculate how long it will take the transformation to go to 88% completion

Given that Avrami equation ( y )= 1 - exp( - kt^n )

n = 2.3

t = 145 secs

reaction = 50% after t = 145 secs

Reaction = 88% after t = ?

attached below is a detailed solution

3 0

3 years ago

Which of the following compounds is always part of an aqueous solution

harkovskaia [24]

The answer is water.

8 0

3 years ago

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A solution of cough syrup contains 5.00% active ingredient by volume. If the total volume of the bottle is 31.0 mL, how many mil

Phantasy [73]

Answer:

The answer to your question is 1.55 ml

Explanation:

Data

Percent by volume = 5%

Total volume = 31 ml

Volume of solute = ?

Formula

Percent by volume = $\frac{Volume of solute}{volume of solution} x 100$

Solve for volume of solute

Volume of solute = $\frac{percent by volume x volume of solution}{100}$

Substitution

Volume of solute = $\frac{5 x 31}{100}$

Simplification

Volume of solute = 1.55 ml

5 0

4 years ago

Read 2 more answers