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2 years ago

6

23. The compound which contains both ionic and covalent compound is

2 answers:

Effectus [21]2 years ago

7 0

Calcium carbonate is another example of a compound with both ionic and covalent bonds. Here calcium acts as the cation, with the carbonate species as the anion. These species share an ionic bond, while the carbon and oxygen atoms in carbonate are covalently bonded.

hoa [83]2 years ago

5 0

Answer:

D and C

Explanation:

KCl

because potassium ion ( K† ) is ionic and Chloride ion ( Cl- ) is covalent.

also KCN can be an alternative answer because the potassium ion ( K† ) is ionic and Cyanide ion ( CN- ) is covalent.

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Umnica [9.8K]

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Oxygen percent composition = [Oxygen mass] / [Total mass of H2O]

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2 years ago

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baherus [9]

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2 years ago

A 1.40-L gaseous system absorbs 75 J of heat and expands its volume to 2.00 L against an external pressure of 1.02 atm. What is

kramer

Answer:

15.24 J is the change in internal energy for this process.

Explanation:

According to the first law of thermodynamics:-

$\Delta U = q + w$

Where,

U is the internal energy

q is the heat

w is the work done

From the question,

q = + 75 J

(+ sign as the heat is being absorbed)

The expression for the calculation of work done is shown below as:

$w=-P\times \Delta V$

Where, P is the pressure

$\Delta V$ is the change in volume

From the question,

$\Delta V$ = 2.00 - 1.40 L = 0.60 L

P = 1.02 atm

$w=-1.02\times0.60\ atmL$

Also, 1 atmL = 101.3 J

So,

$w=-1.02\times0.60\times 101.3\ J=-59.76\ J$ (work is done by the system)

So,

$\Delta U = +75\ J-59.76\ J = 15.24\ J$

<u>15.24 J is the change in internal energy for this process.</u>

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2 years ago