If a metal is less reactive than carbon, it can be extracted from its oxide by heating with carbon. The carbon displaces the metal from the compound, and removes the oxygen from the oxide. This leaves the metal.
Answer: Resonance
Explanation:
A resonance is said to occur when an object experiences a frequency that is equal to its natural frequency.
A resonance refers to the sound that's produced by an object when the object vibrates at an identical rate as the sound waves that is coming from another object.
Therefore, the correct option is C
With an EM wave, the higher the frequency is, the higher the energy but also the lower the wavelength. If a wave has a low frequency, it will have a high wavelength but also low energy. An example is a radio wave.
A high frequency, high energy (but low wavelength) wave like gamma or UV are also ionising which means they have enough energy to knock electrons off atoms.
Answer:I believe you mean Mg(HCO3)2. Since I have never heard of the element MA. but if you are calculating using mg(HCO3)2 your molar mass/ molecular mass will be 146.3387
Explanation:
Answer:
The monomers of polyesters are,
(i) A Dicarboxylic Acid
(ii) A Dialcohol
Explanation:
As depicted from name polyester is a macromolecule which contains numerous ester functional groups. Ester is formed by the condensation of Carboxylic acid and alcohol as shown,
R-COOH + R'OH → RCOOR' + H₂O
Therefore, in order to utilize this reaction for the formation of long chain of polyesters then one can use a dicarboxylic compounds and dialcohol compounds. This will allow to propagate the chain length depending upon the requirement. Hence, the general reaction for the formation of polyester is shown below. The circle and rectangle specifies different moieties which imparts different characters to the polyester.
