Methane and ethane demonstrate the law of definite composition and the law of multiple proportions as these both compounds have the exact atoms but in different ratios.
As for methane, it can be seen that every methane molecule contains 4 hydrogen atoms and 1 carbon atom. Where masses of carbon and hydrogen are in ratio - 12 g C / 4 g H -- reduce to 3g C/ 1 g H .
Ethane contains 2 carbon atoms and 6 hydrogen atom and their mass ratio will be - 24 g C / 6 g H -- reduce to 4 g C/ 1 g H .
So both ethane and methane demonstrate the law of definite composition and the law of multiple proportions.
Law of definite composition: The elements which are present in the compound is combined in the same proportion by mass.
Law of multiple proportion: When two or more compounds are formed by the combination of two elements then the mass ratio of one element is combined with the fixed mass of the other element.
In case of methane, it consist of one carbon atoms and four hydrogen atoms implies that has definite composition. In terms of mass, in methane, carbon and hydrogen atoms are combined in a definite ratio i.e. 12 g C/ 4 g H. Thus, methane has definite composition.
Now, carbon and hydrogen combines to give a class i.e. hydrocarbon. In this case, for every constant mass of carbon the ratio of hydrogen will always reduce to 4/3 ratio for the formation of ethane (hydrocarbon). Thus, law of multiple proportion followed.
Similarly, in case of ethane, this compound also consist of exact atoms but in different ratios.
In case of ethane, it consist of two carbon atoms and six hydrogen atoms implies that has definite composition. In terms of mass, in ethane, carbon and hydrogen atoms are combined in a definite ratio i.e. 24 g C/ 6 g H. Thus, methane has definite composition.
Now, carbon and hydrogen combines to give a class i.e. hydrocarbon. In this case, for every constant mass of carbon the ratio of hydrogen will always reduce to a specific ratio for the formation of methane (hydrocarbon). Thus, law of multiple proportion followed.
Answer:
A branch of science
Explanation:
CHemistry is the investigation and studying substances and their reaction with other elements
Answer:
chemistry :-
A branch of science in which we. . study about chemical
in the chemistry we studied about. elements and compounds and their
composition and reaction
(1) (B) condensation. Condensation is exothermic, but it's not a reaction, it's a physical change.
(2) (C) Although the molecules collide, no heat transfers because there is no temperature difference between the objects.
(3) (C) pressure
(4) (A) a liquid with a high specific heat
(5) Supposing the NO is measured at STP:
(44.8 L) / (22.4 L/mol) x (180.5 kJ / 2 mol NO) = (B) 180.5 J
Answer:
about 1-60
Explanation:
Answer:
she could get 3.6 lemon heads so 3
When dynamite explodes, it releases a large amount of light and heat. This is an example of _____.
slow combustion
rapid combustion
an exothermic reaction
an endothermic reaction
a chemical change
a physical change
Answer
Rapid Combustion
Explanation:
An explosion is a combustion and a quick reaction, That makes it rapid
Answer:
(A.) three dimensional folded structure of the protein
Explanation:
The secondary structure of a protein is a regular structure built from interactions between neighboring amino acids as the polypeptide starts to fold or coil into its functional three-dimensional shape.
The two kinds of secondary structures arising from this polypeptide 'flexing' are either the α-helix and β-pleated structures, all of which are vital to globular and fibrous proteins.
The secondary structure of a protein is the initial folding of the amino acid chain into a corkscrew-like shape (alpha helix) or a zigzag folding pattern (beta-pleated sheet). This occurs due to hydrogen bonding between the peptide bonds.
The secondary structure of a protein refers to the sense in which the polypeptide chain (the linear assembly of amino acids) begins to fold. This folding occurs due to the formation of hydrogen bonds between the peptide bonds in the chain. The two most common types of secondary structures are alpha helix (corkscrew-like shape) and beta-pleated sheet (zigzag folding pattern). Therefore, the correct answer to your question is option d: the twisting of the amino acid chain into a corkscrew-like shape or into a zigzag folding pattern.
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