<h3>Answer;</h3>
2, 1, 2, 1
<h3><u>Explanation</u>;</h3>
Silver chloride reacts with Copper (II) fluoride to form Silver fluoride and Copper (II) chloride.
AgCl (aq) + CuF2 (aq) ----> AgF (s) + CuCl2 (aq)
The balanced chemical equation will be;
2AgCl (aq) + CuF2 (aq) ----> 2AgF (s) + CuCl2 (aq)
Balancing a chemical equation ensures that the Law of conservation of mass is conserved , such that the number of atoms of each element on either side of the equation is equal.
Answer and Explanation:
The ecological footprint is an indicator of sustainability at an international level that integrates all the human impacts over the environment, considering the necessary resources and the generated residues to maintain the modern consumption model. It refers to the productive ecological surface needed to produce resources to consume by one person and to absorb the residues that are produced.
By constant contamination and indiscriminately use of natural resources the impact generated by human in the earth is unmeasurable.
The tragedy of the commons refers to how some people, acting by their own needs or interests, may exceed the use of natural resources, affecting their population and, therefore, other users. These individuals over explode resources thinking only in the present, but not in the future.
The ecological footprint as an indicator makes visible the unsustainable lifestyle of human beings, especially those of the first world. If this lifestyle would project to the rest of the world equally, natural resources would completely disappear. More developed countries are over contaminating and over exploding natural resources, affecting other countries of the third world, and even themselves.
The enzyme lactase
Globally, most human adults are lactose intolerant. People with lactose intolerance produce insufficient amounts of the enzyme lactase.
Lactase is an enzyme that breaks down lactose (milk sugar) to smaller sugars that can be digested. Lactase is found in the small intestine of mammals. Lactase deficiency occurs in individuals whose bodies produce insufficient amount of the enzyme lactase, and are unable to digest milk very well. These individuals are said to be lactose intolerant.
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