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3 years ago

A gas sample has a temperature of 19 °C with an unknown volume. The

Chemistry

1 answer:

andreev551 [17]3 years ago

4 0

Answer: 373 mL

Explanation:

Since there is no change in pressure, the formula: V / T = V / T can be used.

However, you must first convert the temperatures to Kelvin by adding 273 to them:

(19 + 273) = 292K and (90 + 273) = 363K.

Now, plug in: V / 292 = 464 / 363 → V = 373 mL :)

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Which orbitals form a pi bond? A. The s orbital and three p orbitals B. The s orbital and two p orbitals C. Overlapping p orbita

kirill115 [55]

Answer:

C. overlapping p orbitals.

Explanation:

It is a covalent bond formed between neighbouring atom's unbonded p orbitals,

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3 years ago

Look at the graph. Which part of the line shows a time<br> when the object was not moving?

marysya [2.9K]

Answer:

$\bold \blue{b)B}$

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2 years ago

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You are given an unknown solution that is one of the following: 0.1M HCl, 0.1M H2SO4, or 0.1M H3PO4. Given only 0.1M NaOH, deion

MakcuM [25]

Answer:

One of the reason before why people worship idols is because at that time there was kind person who is a pious or a prophet at that time who tell to a nation about goodness and about God to worship god alone and to follow the law of god. after there died, people of the nation miss them so much until there make a idols of them so that there remember him and to remember of the good teaching about the law of god.

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That Is why God send another prophet to

bring back the correct massage again for the humankind and that is why there are many religions that are wrong and worshipping wrong God .

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4) God the one and only have said in the Quran that only islam is the religion that is accepted in the side of God and islam means peace and submission to the will of God. And Muslim means the followers. And all Prophets are muslim. And God the one and only in arabic we call it (Allah). And islam is a religion of all Prophets from the beginning of humankind that is prophet adam to the last prophet that is prophet muhammad. Peace be upon them all.

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5 0

3 years ago

Two concentration cells are prepared, both with 90.0 mL of 0.0100 M Cu(NO₃)₂ and a Cu bar in each half-cell. (b) Calculate Ecell

pogonyaev

The Ecell when an additional 10.0 mL of 0.500 M NH₃ is added is 0.156 V.

When NH3 is added to the first cell, Nh3 react with Cu(NO3) react to form complex.

Thus, Cu2+ ion concentration decrease in the first cell.

Anode

Cu ---- Cu(2+) + 2e-

Cathode

Cu(2+) + 2e- ------ Cu

Ecell can be calculated as

Ecell = E°cell - (0.059/2) log{ Cu(2+) / Cu(+2) cathode}

[Cu2+] cathode = 90ml × 0.01M = 9 × 10^(-4) moles

or,

0.129 = 0 - (0.059/2) log ( Cu(+2) / 9 × 10^(-4))

[Cu(2+) ] anode = 3.8 × 10^(-8) mol

<h3>Chemical reaction of Nh3 with Cu2+</h3>

(Cu2+) + 4 NH3 -----; Cu(NH3)4(2+)

Kf can be given as

Kf = [Cu(NH3)4(2+)]/ [Cu2+] [ NH3]^4

Concentration of NH3 = 19 ml × 0.5 M

= 0.005 m

Kf = 0.005/ (3.8 × 10^(-8) mol) × (0.005) ^4

= 2.09 × 10^14.

If 10ml NH3 id added in the solution, then the total concentration of NH3 can be 20ml and 0.5 M = 0.01mol

Now, we can calculate the [Cu2+] anode

[Cu2+] anode = [Cu(NH3)4(2+)]/ Kf × [ NH3]^4

By substituting all the values, we get

= 4.78 × 10^(-9) moles.

E cell = E°cell - (0.059/2) log{ Cu(2+) / Cu(+2)

0- (0.059/2) log{ 4.78 × 10^(-9) / 9 × 10^(-4))

E cell = 0.156 V.

Thus, we calculated that the Ecell when an additional 10.0 mL of 0.500 M NH₃ is added is 0.156 V.

learn more about Ecell:

brainly.com/question/861659

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7 0

2 years ago

Atoms of hydrogen can become helium atoms during a chemical reaction.<br> True<br> False

marishachu [46]

Answer:

false

in chemical reaction element doesnot change into another

Explanation:

3 0

4 years ago

Read 2 more answers