Which of the following is a source of dissolved substances in the ocean?
2 answers:
is a source of dissolved substances in the ocean.
Further Explanation:
More than 70 % of earth’s surface is occupied by water that is obtained from various seas and oceans. Water in the oceans not only contains pure water, but has several other substances present in it. These substances include different chemicals like sodium chloride, sulfates, potassium, calcium, and magnesium.
When evaporation of ocean water occurs, it removes water from it and salt is left behind so it results in an increase in the salinity of ocean water but cannot act as source of dissolved substances present in water of seas and oceans.Excretions of marine organisms result in secretion of nitrogenous substances and are efficient in water removal from the rectum. Melting of icebergs and sea ice has no effect on the sea level as they were already present inside it.
The process by which large and big rocks are broken down due to various chemical reactions of water and other substances in it is called chemical weathering of rocks. Five major types of chemical weathering include carbonation, oxidation, dehydration, hydration and hydrolysis. When rain pours down, it gets mixed with carbon dioxide of air and carbonic acid is produced, which then flows down and reacts with rocks. This leads to dissolution of some parts of rocks and hence chemical weathering of rocks acts as source of dissolved substances in water.
Hence option a is correct.
Learn more:
- Identify the phase change in which crystal lattice is formed: brainly.com/question/1503216
- The main purpose of conducting experiments: brainly.com/question/5096428
Answer details:
Grade: Senior School
Subject: Chemistry
Chapter: Chemistry in everyday life
Keywords: water, ocean, sea, chemical weathering, evaporation, 70 %, carbonation, hydrolysis, hydration, dehydration, oxidation, dissolved substances.
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Taking into account the reaction stoichiometry, 2.13 grams of magnesium was dissolved in the solution.
<h3>Reaction stoichiometry</h3>In first place, the balanced reaction is:
Mg²⁺(aq) + Na₂CO₃(aq) → MgCO₃(s) + 2 Na⁺(aq)
By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:
- Mg²⁺: 1 mole
- Na₂CO₃: 1 mole
- MgCO₃: 1 mole
- Na⁺: 2 moles
The molar mass of the compounds is:
- Mg²⁺: 24.3 g/mole
- Na₂CO₃: 106 g/mole
- MgCO₃: 84.3 g/mole
- Na⁺: 23 g/mole
Then, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:
- Mg²⁺: 1 mole ×24.3 g/mole= 24.3 grams
- Na₂CO₃: 1 mole ×106 g/mole= 106 grams
- MgCO₃: 1 mole ×84.3 g/mole=84.3 grams
- Na⁺: 2 moles ×23 g/mole= 46 grams
The following rule of three can be applied: If by reaction stoichiometry 1 mole of Na₂CO₃ react with 24.3 grams of magnesium, 0.0877 moles of Na₂CO₃ react with how much mass of magnesium?
<u><em>mass of magnesium= 2.13 grams</em></u>
Finally, 2.13 grams of magnesium was dissolved in the solution.
Learn more about the reaction stoichiometry: