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3 years ago

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Calculate the activation energy for vacancy formation in Al given that the equilibrium number of vacancies at a temperature of 7

73 K is 7.57 X 1023 m-3 . The atomic weight and density of Al are, respectively, 26.98 g/mol and 2.62 g/cc.

1 answer:

Ainat [17]3 years ago

8 0

Answer:

Explanation:

Thx

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A molecule of acetone and a molecule of propyl aldehyde are both made from 3 carbon atoms, 6 hydrogen atoms, and 1 oxygen atom.

TEA [102]

Explanation:

The structures of both acetone and propanal are shown below:

In the formula of propanal there is -CHO functional group at the end.

In acetone -CO- group is present in the middle that is on the second carbon.

The molecular formula is C3H6O.

Both have same molecular formula but different structural formulas.

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3 years ago

What acid and alkali would react to make sodium sulphate

ludmilkaskok [199]

The acid and alkali that would react to make sodium sulfate is

alkali= sodium hydroxide

acid = sulphuric acid

<u><em>explanation</em></u>

Acid react react with alkali to form salt and water.

For sodium sulfate salt to be formed a sulfate acid is required to react with a hydroxide of sodium .

therefore Sodium hydroxide (alkali) react with sulphuric acid (an acid) to form sodium sulfate (salt) and water.

6 0

4 years ago

Carbon monoxide (CO) _____.

kirill [66]

Is a compound made of oxygen and carbon

7 0

3 years ago

Read 2 more answers

An aqueous solution of hydrobromic acid is standardized by titration with a 0.164 M solution of calcium hydroxide. If 14.9 mL of

Arada [10]

Answer:

The molarity of hydrobromic acid is 0.182 M

Explanation:

Step 1: Data given

Molarity of Calcium hydroxide = 0.164 M

Volume of calcium hydroxide = 14.9 mL = 0.0149 L

Volume of HBr = 26.9 mL = 0.0269 L

Step 2: The balanced equation

Ca(OH)2 + 2HBr →CaBr2 + 2H2O

Step 3: Calculate molarity of HBr

b*Ca*Va = a*Cb*Vb

⇒b = the coefficient of HBr = 2

⇒Ca = the molarity of Ca(OH)2 = 0.164 M

⇒Va = the volume of ca(OH)2 = 0.0149 L

⇒a= the coefficient of Ca(OH)2 = 1

⇒Cb = the molarity of HBr = TO BE DETERMINED

⇒Vb = the volume of HBr = 0.0269 L

2*0.164 * 0.0149 = 1*Cb*0.0269

Cb = 0.182 M

The molarity of hydrobromic acid is 0.182 M

6 0

4 years ago

A sample of argon has a volume of 6.0 cm 3 and the pressure is 0.87 atm. If the final temperature is 35 degrees celsius, the fin

____ [38]

Answer:

= 36.185 °C

Explanation:

Using the combined gas law;

P1V1/T1 = P2V2/T2

In this case;

P1 = 0.87 atm

V1 = 6.0 cm³

T1 = ?

P2 = 0.52 atm

V2 = 10 cm³

T2 = 35 °C + 273 = 308 K

Therefore;

T1 = P1V1T2/P2V2

= ( 0.87 × 6.0 × 308)/( 0.52 ×10)

= 309.185 K

Therefore; Initial temperature = 309.185 K - 273 = 36.185 °C

3 0

3 years ago