All categories

3 years ago

Which of the following is a source of dissolved substances in the ocean?

Chemistry

2 answers:

alina1380 [7]3 years ago

8 0

$\boxed{{\text{Chemical weathering of rocks}}}$ 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.

kari74 [83]3 years ago

3 0

The best answer among the choices given is option A. Chemical weathering of rocks is a source of dissolved substances in the ocean. It is a process that involves the erosion of rocks due to chemical reactions by water and substances dissolved in the water. Therefore, it most likely the source of dissolved substances.

You might be interested in

Which type of energy is stored within an object and is partially determined by the object’s position?

Vsevolod [243]

It is A. Electrical energy

3 0

3 years ago

Read 2 more answers

When 91.5 g of isopropyl alcohol which has an empirical formula of C3H8O is burned in excess oxygen gas, how many grams of H2O a

Kobotan [32]

Answer:

109.7178g of H2O

Explanation:

First let us generate a balanced equation for the reaction. This is illustrated below:

2C3H8O + 9O2 —> 6CO2 + 8H2O

Next we will calculate the molar mass and masses of C3H8O and H20. This is illustrated below:

Molar Mass of C3H8O = (3x12.011) + (8x1.00794) + 15.9994 = 36.033 + 8.06352 + 15.9994 = 60.09592g/mol.

Mass of C3H8O from the balanced equation = 2 x 60.09592 = 120.19184g

Molar Mass of H2O = (2x1.00794) + 15.9994 = 2.01588 + 15.9994 = 18.01528g/mol

Mass of H2O from the balanced equation = 8 x 18.01528 = 144.12224g

From the equation,

120.19184g of C3H8O produced 144.12224g of H20.

Therefore, 91.5g of C3H8O will produce = (91.5 x 144.12224) /120.19184 = 109.7178g of H2O

7 0

3 years ago

Dissolving brass requires an oxidizing acid such as concentrated nitric acid. Nitrogen dioxide is produced as a byproduct in thi

polet [3.4K]

Answer:

Cu + 4 HNO₃ → Cu(NO₃)₂ + 2 NO₂ + 2 H₂O

Explanation:

Step 1: Write down the chemical formulas of given substances,

Copper Metal = Cu

Nitric Acid = HNO₃

Copper (II) Nitrate = Cu(NO₃)₂

Nitrogen Dioxide = NO₂

Water = H₂O

Step 2: Write down the unbalance Chemical equation,

Cu + HNO₃ → Cu(NO₃)₂ + NO₂ + H₂O

Step 3: Balance Cu atoms on both sides;

The number of Cu atoms on both sides are same. Hence, there number will remain the same.

Step 4: Balance N atoms on both sides;

As there is 1 N atom on left hand side and 3 N atoms on right hand side, so we will multiply HNO₃ by 3 to balance N on both sides, hence,

Cu + 3 HNO₃ → Cu(NO₃)₂ + NO₂ + H₂O

Step 5: Balance O atoms on both sides;

As there are 9 O atom on left hand side and 9 O atoms on right hand side, so they are balance.

Step 6: Balance H atoms on both sides;

As there are 3 H atom on left hand side and 2 H atoms on right hand side, so we will multiply H₂O by 2 as,

Cu + 3 HNO₃ → Cu(NO₃)₂ + NO₂ + 2 H₂O

By doing so the number of O atoms got imbalanced, so to balance O atoms again we will multiply HNO₃ by 4 as,

Cu + 4 HNO₃ → Cu(NO₃)₂ + NO₂ + 2 H₂O

Now, The Cu and H atoms are balanced, and the O atoms are greater on left hand side and the N atoms are greater on right hand side, therefore we will multiply NO₂ by 2 to balance both N and O as,

Cu + 4 HNO₃ → Cu(NO₃)₂ + 2 NO₂ + 2 H₂O

7 0

3 years ago

Which element is the least reactive? Neon, Chlorine, Gallium or Tin

Katen [24]

Noble gases are supposed to be the least reactive elements so I’m assuming Neon would be the most least reactive out of all of them.

7 0

3 years ago

Read 2 more answers

Examplle of exchange reaction

boyakko [2]

An exchange reaction consists of both synthesis and decomposition reactions.
Here’s a complex example: AB + CD → AC + BD.
Another example might be: AB + CD → AD + BC.

7 0

3 years ago