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alexdok [17]
3 years ago
12

Which ion with a charge of -2 has an electron configuration of 1s22s22p6 ?

Chemistry
2 answers:
tester [92]3 years ago
8 0

Answer:

The answer is option B.

<h3>O2-</h3>

Hope this helps you

statuscvo [17]3 years ago
4 0

Answer:

O2-

Explanation:

done the topic

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How many moles are in 59.6 grams of BaSO4​
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0.2553669915026199 BaSO4

Explanation:

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A low level of carbon dioxide labeled with 14C is accidentally released into the atmosphere surrounding industrial workers as th
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D) One half of the carbon atoms of newly synthesized acetyl CoA.

Explanation:

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What is the name of the covalent compound ccl4?
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4 years ago
Calculate the molality and van’t Hoff factor (i) for the following aqueous solutions:
MissTica

The van 't Hoff factor is the ratio between the actual concentration of particles produced when the substance is dissolved and the concentration of a substance as calculated from its mass. For most non-electrolytes dissolved in water, the van 't Hoff factor is essentially 1.

<h3>What is the value of Van t Hoff factor?</h3>

For most non-electrolytes dissolved in water, the Van 't Hoff factor is essentially $ 1 $ . For most ionic compounds dissolved in water, the Van 't Hoff factor is equal to the number of discrete ions in a formula unit of the substance.

<h3>Which has highest Van t Hoff factor?</h3>

The Van't Hoff factor will be highest for

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   B. Magnesium chloride.

   C. Sodium phosphate.

   D. Urea.

Learn more about van't off factor here:

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3 0
2 years ago
Which equation represents single replacement reaction? A) CH4 + 2 02 → CO2 + 2 H2O B) CaCO3 + CaO + CO2 C) 2 Na + 2 H2O → 2 NaOH
loris [4]

Answer:

C) 2 Na + 2 H2O → 2 NaOH + H2.

Explanation:

Hello there!

In this case, according to the given chemical reactions, it is possible to firstly understand that a single displacement reaction is characterized by the presence of a single element as the first reactant and a compound as the second one, thus, yielding a compound as the first product and a single element as the second one.

In such a way, according to the given choices, it possible to note that C) 2 Na + 2 H2O → 2 NaOH + H2 is the only one with the aforementioned condition as the element at the reactants side is Na and at the products side is H2.

Best regards!

6 0
3 years ago
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