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Marysya12 [62]
3 years ago
7

Określ typ tlenku (zasadowy,kwasowy,obojętny,amfoter) CuO, FeO,Cr2O3,P4O10,MnO2,CaO,CrO3,SO3

Chemistry
1 answer:
AVprozaik [17]3 years ago
6 0

Answer:

hrhrhr

Explanation:

because h&R blok

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At a birthday pool party, the temperature is 28.50°C and the atmospheric pressure is 755.4 mmHg. One of the decoration helium ba
Iteru [2.4K]

Answer:

The volume of the balloon will be 5.11L

Explanation:

An excersise to solve with the Ideal Gases Law

First of all, let's convert the pressure in mmHg to atm

1 atm = 760 mmHg

760 mmHg ___ 1 atm

755.4 mmHg ____ (755.4 / 760) = 0.993 atm

922.3 mmHg ____ ( 922.3 / 760) = 1.214 atm

T° in K = 273 + °C

28.5 °C +273 = 301.5K

26.35°C + 273= 299.35K

P . V = n . R .T

First situation: 0.993atm . 6.25L = n . 0.082 . 301.5K

(0.993atm . 6.25L) / 0.082 . 301.5 = n

0.251 moles = n

Second situation:

1.214 atm . V = 0.251 moles . 0.082 . 301.5K

V = (0.251 moles . 0.082 . 301.5K) / 1.214 atm

V = 5.11L

7 0
3 years ago
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What is another way to measure the average kinetic energy of a substance?
GuDViN [60]

Answer:

Using temperature or a thermometer

Explanation:

Since AKE equals = temperature, you can find the temperature of a substance with a thermometer, which gives the temperature.

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2 years ago
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2. I need to find the angle of corner of a room, what tool could I use?
Pavlova-9 [17]
If anything you would use a protractor but that’s not a answer.... so I would pick whatever relates to a protractor
6 0
3 years ago
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stiv31 [10]

Answer:

Explanation:

he pH of the water will determine the toxic effects, if any, of these substances.

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Select the single best answer. Explain the observed trend in the melting points for four isomers of molecular formula C7H16. mp
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Answer:

The ability of the molecule to pack more tightly increases the melting point.

Explanation:

In hydrocarbons of same molecular formula, melting point is determined by:

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Higher the intermolecular forces and molecular symmetry, higher will be the melting point.

Intermolecular forces in hydrocarbons decreases with branching. Moreover, branching interfere the tight packing of the molecule in the crystal. Therefore, branched hydrocarbons tend to have lower melting point.

However, in highly branched hydrocarbons molecular symmetry increases which results in tight packing of the molecule in the crystal.

So, highly tight packed molecules tend to have high melting point.

As (CH3)2CHC(CH3)3 is highly branched and has high molecular symmetry, therefore, its melting point is highest among given.

So, among the given, option c is correct.

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