What is enthalpy of atomisation

1 answer:

5 0

The enthalpy of atomization (also atomisation in British spelling) is the enthalpy change that accompanies the total separation of all atoms in a chemical substance (either a chemical element or a chemical compound)

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Which of the following characterizes a reaction at equilibrium?

Alekssandra [29.7K]

I’m pretty sure the correct answer is D.

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2 years ago

What quantity is ph a measure of

marusya05 [52]

Answer:

The pH of a solution is a measure of the molar concentration of hydrogen ions in the solution and as such is a measure of the acidity or basicity of the solution.

8 0

3 years ago

(30 Points) You need to produce a buffer solution that has a pH of 5.02. You already have a solution that contains 10. mmol (mil

chubhunter [2.5K]

By definition:

pH = pKa + log [acetate]/ [acetic acid]

so

5.02 = 4.74 + log [acetate] / 10 mmole

10mmole = 10/1000 = 0.01 mole

5.02 = 4.74 + log [acetate] / 0.01

5.02 - 4.74 = 0.28 = log [acetate] /0.01

10^0.28 = 1.90546 = [acetate] / 0.01 
[acetate] = 0.019 mole

= 19 millimoles

8 0

3 years ago

Read 2 more answers

What is the shape of name of Co2

Gennadij [26K]

Answer:

The shape is called a Linear shape

The molecule is called Carbon dioxide molecule.

Explanation:

The shape is linear because of the strong repulsive force between the lone pairs

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3 years ago

A nuclear waste site. cesium-137 is a particularly dangerous by-product of nuclear reactors. it has a half-life of 30 years. it

hram777 [196]

The mass decay rate is of the form
$m(t) = m_{0} e^{-kt}$
where
m₀ = 3000 g,the initial mass
k = the decay constant
t = time, years.

Because the half-life is 30 years, therefore
$e^{-30k} = \frac{1}{2} \\\ -30k = ln(0.5) \\ k = \frac{ln(0.5)}{-30} =0.0231$

After 60 years, the mass remaining is
$m = 3000 e^{-0.0231*60} = 750 \, g$

Answer: 750 g

4 0

3 years ago