Answer: True
The great pacific garbage patch is a landfill of waste that is located between Hawaii and California. It is the biggest landfill in the world. This zone consists of large population of phytoplanktons and small fishes but it lacks large fishes and mammals. This zone is mainly occupied with plastics which floats over the surface of water. The eastern and western patch collectively called as the great pacific garbage patch. From the west coast the waste is discharged by the U.S and from the east coast the waste is discharged by the Japan.
Therefore, the statement pollution from many nations contributes to the Great Pacific Garbage Patch is true.
A single replacement reaction is a type of chemical reaction in which one element replaces another in a compound. A common example of this is when zinc replaces hydrogen in hydrochloric acid to create zinc chloride and hydrogen gas.
A single replacement reaction is a chemical reaction in which one element replaces another element in a compound. This type of reaction can be represented as follows: A + BC -> AC + B. In this equation, 'A' is the single element that replaces 'B' in the compound 'BC', forming the new compound 'AC' and releasing 'B' as a separate element.
For example, one common single replacement reaction occurs when zinc replaces hydrogen in hydrochloric acid to form zinc chloride and hydrogen gas. This reaction can be written as: Zn + 2HCl -> ZnCl2 + H2.
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(2) hydroxide ions as the only positive ions
(3) hydronium ions as the only negative ions
(4) hydronium ions as the only positive ions
Answer: Option (1) is the correct answer.
Explanation:
Sodium hydroxide is a strong base and when it is dissolved in water it completely dissociates into ions.
The chemical equation for this dissociation is as follows.
Therefore, we can see that sodium ions are the only positive ions and hydroxide ions are the only negative ions formed upon dissociation of NaOH in water.
Thus, we can conclude that the compound NaOH(s) dissolves in water to yield hydroxide ions as the only negative ions.
B) Arrhenius bases
C) Brønsted-Lowry bases
D) Brønsted-Lowry acids
B) an atom with 6 protons and 6 neutrons - an atom with 6 protons and 7 neutrons
C) an atom with 8 protons and 8 neutrons - an atom with 7 protons and 8 neutrons
D) an atom with 7 protons and 6 neutrons - an atom with 6 protons and 6 neutrons
Answer: The correct answer is Option B.
Explanation:
Isotope is defined as the chemical specie which belong to the same element but differ in their molecular mass.
The isotopes have same atomic mass but differ in their mass numbers
Atomic number is defined as the number of protons or electrons that are present in a neutral atom.
Atomic number = number of protons = number of electrons
Mass number is defined as the sum of number of protons and neutrons that are present in an atom.
Mass number = Number of protons + Number of neutrons
Thus, isotopes of an element has same number of protons but they differ in the number of neutrons.
For Example: Chlorine has 2 isotopes,
Number of protons = 17
Number of neutrons = 35 - 17 = 18
Number of protons = 17
Number of neutrons = 37 - 17 = 20
Hence, the correct answer is Option B.
equilibrium constant. Why?"
Enzymes cannot change the thermodynamic equilibrium constant of a reaction because they do not alter the free energy difference between the reactants and products.
Enzymes are biological catalysts that speed up chemical reactions by lowering the activation energy required for the reaction to occur. They achieve this by providing an alternative reaction pathway with a lower activation energy. However, enzymes cannot change the thermodynamic equilibrium constant of a reaction.
The thermodynamic equilibrium constant is a measure of the ratio of products to reactants at equilibrium. It is determined by the difference in free energy between the reactants and products. Enzymes, although they accelerate the rate at which equilibrium is reached, do not alter the free energy difference between the reactants and products. Therefore, they cannot change the equilibrium constant.
Learn more about enzymes and thermodynamic equilibrium here:
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