1. What is the charge of an oxide ion?
O
2+
3+
2-
оо
3-
Answers
Answer:
2+
Explanation:
An oxide ion is diatomic
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Salinity refers to what?A. density B. pressure C. temperature D. dissolved salt
Which is something that a PURE SUBSTANCE and a SOLUTION have in common?A) They both are made of one kind of particle.B) They both are made of different kinds of particles.C) They both look speckled or chunky.D) They both look uniform (the same) throughout.
The statement "matter can be neither created nor destroyed by chemical means, but it can be changed from one form to another" is the chemical law ofa. conservation of energy.b. conservation of matter.c. atomic disintegration.d. definite proportions.
To identify a diatomic gas (X2), a researcher carried out the following experiment: She weighed an empty 4.4-L bulb, then filled it with the gas at 1.00 atm and 22.0 ∘C and weighed it again. The difference in mass was 5.1 g . Identify the gas.
(2) a ketone (4) an ester
Answers
Answer : The correct option is, (4) an ester.
Explanation :
As we know that an organic acid is an organic compound that has the properties of an acid. For example : Acetic acid.
And the alcohol is an organic compound that contains one or more hydroxyl groups attached to a carbon atom. Fro example : Ethanol.
When an organic acid react with an alcohol the it produces an ester.
For example : when an organic acid (acetic acid) react with an alcohol (ethanol) to gives an ester (methoxyethane).
The balanced chemical reaction will be,
Hence, the reaction between an organic acid and an alcohol produces an ester.
2
6
10
14
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So, having this in mind, 10 electrons in total can be contained in the 4d sublevel.
lithosphere
hydrosphere
biosphere
geosphere
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Answer: D) Petroleum Jelly
Explanation: Petroleum jelly is also known as white soft paraffin or Vaseline. It's a semi-solid mixture of hydrocarbons that can be used as a lubricant and protective ointment for dry or chapped skin. It can also be used to protect against minor cuts and burns.
The mass increases as it changes from a liquid to a solid.
The mass decreases as it changes from a liquid to a solid.
There is no mass once the substance becomes a solid
Answers
Answers
A lithium cation ion is smaller than a lithium atom. In lithium cation it has lost electrons, which causes the remaining electrons to be pulled in stronger by the positive charge in the nucleus. As they get closer to the nucleus decreases the overall size of the atom.
The bigger they are (the more electrons it has) the less effective the proton's pull will be. So if we were talking about a lithium anion (where electrons are gained) then it would be bigger than a lithium atom.
Lithium cation and Lithium atom can be compared as follow;
1) Charge:
The charge on Lithium atom is zero means, it has same number of protons and electrons. Hence, the nert effect is cancelled out and the atom gets zero charge.
On the other hand, Lithium cation is formed when it looses one electron. Therefore, the number of protons are greater by one number as compared to number of electrons resulting in the formation of +1 charge as shown below,
Li → Li⁺¹ + e⁻
2) Size:
Secondly, Lithium atom has greater size as compared to Lithium cation because due to presence of greater number of protons compared to electrons in Lithium cation the nuclear charge appears to be greater as compared to neutral atom hence, pulling the valence electrons more effectively making the lithium cation smaller in size as compared to neutral atom.
3) Reactivity:
We can also compare the reactivity of both species. The neutral will be more reactive than the charged atom because it is containing one valence electron and can donate it when ever it comes in contact with non-metals.