Answer:
(a) magnesium arsenide: As₂Mg₃
(b) indium(III) sulfide: In₂S₃
(c) aluminum hydride: AlH₃
(d) hydrogen telluride: H₂Te
(e) bismuth(III) fluoride: BiF₃
Explanation:
(a) magnesium arsenide:
The expected oxidation states are-
Magnesium ion- Mg²⁺
Arsenide ion- As³⁻
The chemical formula is: As₂Mg₃
(b) indium(III) sulfide:
The expected oxidation states are-
Indium ion- In³⁺
Sulfide ion- S²⁻
The chemical formula is: In₂S₃
(c) aluminum hydride:
The expected oxidation states are-
Aluminium ion- Al³⁺
Hydride ion- H⁻
The chemical formula is: AlH₃
(d) hydrogen telluride:
The expected oxidation states are-
Hydrogen - H⁺
telluride ion- Te²⁻
The chemical formula is: H₂Te
(e) bismuth(III) fluoride:
The expected oxidation states are-
bismuth ion- Bi³⁺
fluoride ion- F⁻
The chemical formula is: BiF₃
Ocean acidification refers to a reduction in the pH of the ocean over an extended period of time, caused primarily by the uptake of carbon dioxide (CO2) from the atmosphere.
Because of human-driven increased levels of carbon dioxide in the atmosphere, there is more CO2 dissolving into the ocean. The ocean's average pH is now around 8.1, which is basic (or alkaline), but as the sea continues to absorb more CO2, the pH decreases and the ocean becomes more acidic.
How does ocean acidification affect us?
Ocean acidification can modify the abundance and chemical composition of harmful algal blooms in such a way that shellfish toxicity increases and, therefore, human health are negatively affected.
How we can reduce ocean acidification?
The most effective way to limit ocean acidification is to act on climate change, implementing solutions to dramatically reduce the use of fossil fuels. If we dramatically cut our global warming emissions, and we limit future warming, we can significantly reduce the harm to marine ecosystems.
To know more about ocean acidification:
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An energy diagram of a chemical reactions illustrates the changes of energy as the chemical reactions advances.
At first, the energy in the diagram is the energy of the reactants.
As the reaction goes forward, the reactants start to react forming a transition compound, with a maximum energy level on the graph. This is the hill. So the hill represents the Activation Energy.
After that, the energy starts to decrease and at the end you have the energy of the products, which may be higher or lower than the initial energy of the reactants, depending upon whether the reaction is exothermic or endothermic.
For exothermic reactions the energy level of the products is lower than the energy level of the reactants, while for endothermic reactions the energy level of the products is higher than the energy level of the reactants.
Answer: d) 
and 
Explanation:
A double displacement reaction is one in which exchange of ions take place. The salts which are soluble in water are designated by symbol (aq) and those which are insoluble in water and remain in solid form are represented by (s) after their chemical formulas.
A neutralization reaction is a double displacement reaction in which an acid reacts with base to produce salt and water. The 
ions from water reacts with 
ions from base to give water.
Thus products that will be released when the antacid is mixed with the hydrochloric acid in the stomach are and
