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IgorC [24]
4 years ago
9

T or F: a. A concentrated solution in water will always contain a strong or weak electrolyte

Chemistry
1 answer:
Eduardwww [97]4 years ago
8 0

Answer:

true

Explanation:

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How many molecules are in 20.0 L(liters) of SO2 at STP
Finger [1]

5.4 x 10²³ molecules

Explanation:

Given parameter

Volume of gas = 20L

Condition of reaction = STP

Unknown:

number of molecules

Solution:

The number of molecules of a substance is given by;

   Number of molecules = Number of moles x avogadro's constant

Number of moles at stp = \frac{volume of gas}{22.4}

 Number of moles of SO₂ = \frac{20}{22.4} = 0.893mole

Number of molecules = 0.893 x 6.02 x 10²³ = 5.4 x 10²³ molecules

learn more:

Number of molecules brainly.com/question/10818009

#learnwithBrainly

4 0
3 years ago
Where are the most reactive nonmetal elements found on the periodic table?
Varvara68 [4.7K]

Answer is: group 17 on the periodic table.

Group 17 (halogens) elements are: fluorine (F), chlorine (Cl), bromine (Br) and iodine (I).

They are very reactive and easily form many compounds.  

Fluorine and chlorine are in gaseous state, bromine is liquid and iodine is in solid state in room temperature.

Halogens need to gain one electron to have electron cofiguration like next to it noble gas.

For example, fluorine has 9 electrons and it gain easily one electron in chemical reaction to have electron configuration like noble gas neon (Ne) with 10 electrons.  

6 0
3 years ago
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What is the amount of heat required to completely melt a 200
Snowcat [4.5K]
A 200 what? Then I can help!
7 0
3 years ago
How does helium form (5-8) sentences
Firlakuza [10]
On Earth it is relatively rare—5.2 ppm by volume in the atmosphere. Most terrestrial helium<span> present today is created by the natural radioactive decay of heavy radioactive elements (thorium and uranium, although there are other examples), as the alpha particles emitted by such decays consist of </span>helium<span>-4 nuclei.</span>
7 0
4 years ago
Physical properties
hichkok12 [17]

Answer:

melting point,boiling point ,density,refractive index.

Explanation:

5 0
3 years ago
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