As water freezes or evaporates, the salinity of the remaining ocean water increases. This is due to the separation of pure water molecules from the dissolved ions during both evaporation and the crystallization process of freezing, leaving behind a higher concentration of salts in the water.
Explanation:When water freezes or evaporates, the salinity of the remaining ocean water increases. During the process of evaporation, only the water molecules transition from a liquid state to gas and subsequently condense to form clouds, leaving the dissolved ions like salt behind. This concentration effect also occurs when water freezes. Ice crystallizes and incorporates very little of the dissolved salts, thus also leaving behind more concentrated salty water.
In the context of desalination, one can observe how these natural processes of phase change can separate the water from its dissolved substances. While the evaporative process is a distillation that produces almost pure water, the freezing process excludes salts from the solid ice phase. As a result, methods such as evaporation, condensation, and freezing are employed to purify water and reduce its salinity.
Moreover, in temperature dynamics during the freezing of water, the heat released keeps the temperature steady at the melting point while the rest of the water turns into ice. This phenomenon has implications for the thermodynamic properties of water and how such changes affect the surrounding environment.
How many grams of oxygen are in 50.00 g of sucrose? Show work please
Cladistics is a way to separate animals into new species. t or f
When gold is melted and formed in a mold to make a piece of jewelry, what type of change is taking place?
Describe matter, and explain why is light is not classified as matter?
A 12.2-g sample of x reacts with a sample of y to form 78.9 g of xy. what is the mass of y that reacted?
The mass of Y that reacted is 66.7 g.
Explanation:In compound X, the mass ratio of carbon to hydrogen is 14.13 g C : 2.96 g H. This number ratio supports the law of multiple proportions, indicating that X and Y are different compounds. To find the mass of Y that reacted, you can subtract the mass of X from the total mass of XY:
Mass of Y = Total mass of XY - Mass of X
Mass of Y = 78.9 g - 12.2 g
Mass of Y = 66.7 g
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According to dalton's atomic theory, when elements react, their atoms combine in
Final answer:
According to Dalton's atomic theory, when elements react, their atoms combine in simple whole number ratios to form chemical compounds. In chemical reactions, atoms can be combined, separated, or rearranged, but they are neither created nor destroyed.
Explanation:
According to Dalton's atomic theory, when elements react, their atoms combine in simple whole number ratios to form chemical compounds. In chemical reactions, atoms can be combined, separated, or rearranged, but they are neither created nor destroyed. This means that the number of atoms in the reactants is equal to the number of atoms in the products.
Are Si valence electrons shared?
Are C valence electrons shared?
Answer:
4
Explanation:
Si has atomic number 14 so the electronic configuration 2,8,4
Valence electrons of Si and C are shared in covalent bonding.
Explanation:In a covalent bond, valence electrons are shared between atoms. The number of valence electrons an element has determines how many covalent bonds it can form. For example, carbon (C) has 4 valence electrons, so in a covalent bond, these 4 electrons are shared with other atoms.
Similarly, silicon (Si) also forms covalent bonds by sharing its valence electrons. Silicon has 4 valence electrons like carbon, so it can form 4 covalent bonds as well.
If a sulfur ion with 16 protons and 17 electrons loses one electron, what is the resulting charge?
When a sulfur ion with 16 protons and 17 electrons loses one electron, the resulting charge is 0. This is because the number of protons equals the number of electrons, resulting in no overall charge.
Explanation:The question here asks: If a sulfur ion has 16 protons and 17 electrons and this ion loses one electron, what is the resulting charge? In order to answer this, it's important to understand that the charge of an ion is determined by the difference between the number of protons and the number of electrons. Initially, the sulfur ion had one more electron than protons, giving it a charge of -1.
However, when it loses an electron, the number of protons and electrons equal each other, resulting in a neutral ion with a charge of 0. Therefore, when a sulfur ion with 16 protons and 17 electrons loses one electron, the resulting charge is 0. This is because the number of negatively charged electrons now equals the number of positively charged protons, resulting in no overall charge.
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(10 Points) It is thought that the strongest intermolecular forces between molecules of NO are
a. Covalent Bonds
b. Dipole dipole interactions
c. London Dispersion
d. hydrogen bonds
e. ionic bonds
My guess is B but can someone explain it to me please?
The strongest intermolecular forces between molecules of NO are dipole-dipole interactions NO. The correct answer is option b.
Intermolecular forces are the attractive forces that exist between molecules and affect the physical properties of substances.
NO is a polar molecule due to the difference in electronegativity between nitrogen and oxygen atoms. This means that the molecule has a positive and negative end, or dipole.
Dipole-dipole interactions occur between polar molecules and are the result of the attraction between the positive end of one molecule and the negative end of another. These interactions are stronger than London dispersion forces, which occur between nonpolar molecules, because the polarity of the molecules allows for a stronger attraction.
On the other hand, NO does not have hydrogen bonding because it does not contain hydrogen atoms bonded to highly electronegative atoms like nitrogen, oxygen, or fluorine.
NO also does not have covalent, ionic, or metallic bonding because these types of bonding occur within a molecule, not between molecules.
Therefore, dipole-dipole interactions is the strongest intermolecular forces between molecules of NO. Option b is the correct answer.
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The "particles" of a gas are actually protons or electrons. true or false
Why a preservative not added when preparing non aqueous drug solution?
Does water boil at the same temperature everywhere
Answer:
No, Water boils faster at higher altitudes.
Explanation:
What is the mass and charge of an electron
Answer:
Charge of -1 and a mass of 1/1836 amu
Explanation:
Grapefruit juice is approximately ph 3, and tomato juice is approximately ph 4. a glass of grapefruit juice contains _____ h+ as a glass of tomato juice.
A glass of grapefruit juice contains ten times more H+ than a glass of tomato juice.
How many H+ ions are in a specific pH?The pH of any solution is determined with the help of hydrogen ion concentration. For example, if a neutral solution has a pH of 7, it means that the concentration of H+ ions is [tex]10^-^7[/tex]. In other words, it may contain 0.0000001 mol of hydrogen ions in a solution of 1 liter.
According to the question,
The pH of Grapefruit juice is = 3
The concentration of H+ ions = [tex]10^-^3[/tex] = 0.001 mol.
The pH of Tomato juice = 4.
The concentration of H+ ions = [tex]10^-^4[/tex] = 0.0001 mol.
From the above concentration of both hydrogen ion concentrations, it is clearly illustrated that a glass of grapefruit juice contains ten times more H+ than a glass of tomato juice.
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How many electrons are shown in iodine electron dot structure?
The electron dot structure of iodine shows seven dots surrounding the 'I' symbol. Each dot represents one valence electron in the outermost shell. This represents iodine in a neutral state, not involved in a bond.
Explanation:The iodine atom is represented in an electron dot structure, also known as a Lewis dot structure, by the symbol 'I' surrounded by seven dots. Each dot represents one valence electron. Iodine belongs to group 17 (Halogens) in the periodic table and has 7 valence electrons in its outermost shell. The aim of the Lewis dot structure is to show the valence electrons that participate in forming bonds in compounds.
In the case of iodine, until it gains an electron to obtain a stable configuration, its Lewis dot structure will show seven valence electrons as dots around the symbol 'I'. This applies to all neutral atoms of iodine not involved in a chemical bond. When iodine forms a compound, the electron dot structure could be different, as it would show how the electrons are shared or transferred.
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Weight measures
A. How dense an object is.
B. How large an object is.
C. The amount of mass in an object.
D. The effect of gravity on an object.
Answer: D) The effect of gravity on an object
Explanation: We're not talking about mass, we're talking about weight. Weight is measured by the force of gravity on a object. For examples, you might be 100 pounds on Earth but 12 pounds on the moon.
Why is the nacl extracted with water three times as opposed to only once?
NaCl is extracted multiple times with water to ensure more complete dissolution and improved recovery, as well as to remove impurities for a purified product.
The reason NaCl is extracted with water three times as opposed to only once is primarily due to the principle of solute recovery or purification. When a soluble substance like NaCl is dissolved in water, it may not fully dissolve in a single extraction. By performing multiple extractions, you ensure a more complete dissolution or recovery of the NaCl, which improves the efficiency of the extraction process. Additionally, repeated extractions can help remove impurities that are less soluble in water. Each subsequent extraction with fresh water removes a fraction of the remaining solute and any impurities, leading to a purified product.
Which statement is true about both a solid and a gas? A. They both fill a container. B. The both have defined shapes in any space. C. The atoms of both are moving. D. There is never any motion in either. PLEASEEE HELP PLEASEEEEEEEEE
Answer: Option (C) is the correct answer.
Explanation:
In a solid, molecules are held together by strong intermolecular forces of attraction. As a result, they are unable to move from their initial place but they can vibrate at their mean position.
Hence, in solid substances the molecules have low kinetic energy and they have fixed shape and volume.
In gases, the molecules are held by weak Vander waal forces. Hence, they have high kinetic energy due to which they move rapidly from one place to another leading to more number of collisions.
Hence, gases are able to expand more rapidly as compared to liquids and solids.
Thus, we can conclude that the statement atoms of both are moving, is true about both a solid and a gas.
Which type of bond would most likely form between lithium and fluorine to make lithium fluoride?
Which type of change occurs when the electrons of two atoms interact to form an atomic bond?
What is the lowest atomic number a new element can have
The lowest atomic number a new element can have is 119 as 118 elements are known .
What is atomic number?Atomic number are defined as a chemical element's number in the periodic system, which places the elements in ascending order of the number of protons in their nuclei.
It can also be defined as the charge number of an atomic nucleus is represented by the nuclear charge number (symbol Z) of a chemical element.
Elements are defined as a pure substance made up only of one sort of atom, each of whose nuclei contains the same number of protons.
It can also be defined as a substance that chemistry cannot divide into simpler substances.
There are three types of elements.
Metals Non metals MetalloidsThus, the lowest atomic number a new element can have is 119 as 118 elements are known .
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What is the mass number of an iron atom that has 28 neutrons?
The mass number of an iron atom is calculated by adding the number of protons and neutrons. Since an iron atom universally has 26 protons and this particular atom has 28 neutrons, the mass number is 26+28=54.
Explanation:The mass number of an atom is determined by adding the number of protons and neutrons in the nucleus of the atom. Iron (Fe) universally has 26 protons. In the given case, an iron atom has 28 neutrons. Therefore, to find the mass number, you will add the number of protons (26) to the number of neutrons (28).
So, Mass Number = Number of Protons + Number of Neutrons = 26 + 28 = 54.
Therefore, the mass number of an iron atom with 28 neutrons is 54.
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An atom with one valence electron combines with an atom with seven valence electrons.
what is likely to happen to the atom with one valence electron?
What is the classification for this polynomial 3g^2?
You have a 28.2-g sample of a metal heated to 95.2°c. you drop it in a calorimeter with 100. g of water at 25.1°c. the final temperature of the water is 31.0°c. assuming no heat loss to the surroundings nor the calorimeter, calculate the heat capacity of the metal.
The heat lost by the metal should be equal to the heat gained by the water. We know that the heat capacity of water is simply 4.186 J / g °C. Therefore:
100 g * 4.186 J / g °C * (31°C – 25.1°C) = 28.2 g * Cp * (95.2°C - 31°C)
Cp = 1.36 J / g °C
Which of the subatomic particles is responsible for the chemical behavior of a given atom?
When substances go through chemical changes, which of the following will always happen?
A.
One or more substances with different chemical properties will form.
B.
One or more substances will be completely destroyed.
C.
A poisonous gas will form or a white solid will precipitate.
D.
all of these
Answer: A. One or more substances with different chemical properties will form.
Explanation:
Chemical change is defined as a change in which rearrangement of atoms take place and leads to formation of new substance. Thus as new substances are formed, the chemical properties of the products will alwys be different from the chemical properties of reactants.
Physical change is defined as a change in which change in shape, size or state of the substance takes place. No new substance is formed.
Chemical change may involve following changes:
1) Formation of precipitates
2) Absorption or evolution of heat
3) Color change
4) Evolution of gas
Describe how you could find the mass of the irregular object without use of a balance
Using the periodic table, determine which material is most likely to be a good insulator. magnesium silver aluminum sulfur
Answer:
sulfur
Explanation:
The isotope 65 29cu2+ has how many electrons and how many protons?