Answer: 
Explanation:
For formation of a neutral ionic compound, the charges on cation and anion must be balanced. The cation is formed by loss of electrons by metals and anions are formed by gain of electrons by non metals.
Here iron is having an oxidation state of +3 called as 
cation and oxide 
is an anion with oxidation state of -2. Thus they combine and their oxidation states are exchanged and written in simplest whole number ratios to give neutral 
.
According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced.
Answer:
There are 110 elements known to us, out of which 92 are naturally occurring, while the rest have been prepared artificially. Elements are further classified into metals, non-metals, and metalloids..
Explanation:
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Answer:
8 electrons
Explanation:
as the the 1st period (H and He), it can hold up to 2 electrons. in the 2nd period (Li, Be, B, C, N, O, F and Ne), it can hold up to 8 electrons. Itstops at 6 when it reached O. add the lelectrons that you have
2+6=8
8 electrons
Answer:
functional group - carboxylic
molecule name- propanic acid
Explanation:
Vapor pressure is defined as the pressure exerted by vapors or gas on the surface of a liquid.
Hence, more is the vapor pressure more will be the vapors formed. As a result, more will be the vapor pressure of the substance.
Covalent bonds are the bonds formed due to sharing of electrons. These are weak in nature as compared to hydrogen bonds. This is because hydrogen bonds have partial ionic character which makes it stronger than covalent bonds.
Intermolecular forces are the forces present within the molecules and not the interatomic force.
Therefore, we can conclude that true statement is vapor pressure increases with temperature.
