The molecular formula of a substance can be determined from its elemental composition. In this case, we know that lysine contains two nitrogen atoms, 19.2% nitrogen, 9.64% hydrogen, 49.3% carbon, and 21.9% oxygen by mass.
For nitrogen, the atomic weight is 14.01 g/mol, so the number of nitrogen atoms in the molecule can be calculated as follows:
mass of nitrogen = 19.2 g N / 100 g lysine = 0.192 g N
number of nitrogen atoms = 0.192 g N / 14.01 g/mol = 0.0137 mol Nnumber of nitrogen atoms = 0.0137 mol N * Avogadro's number = 8 nitrogen atoms
mass of hydrogen = 9.64 g H / 100 g lysine = 0.0964 g H
number of hydrogen atoms = 0.0964 g H / 1.01 g/mol = 0.0953 mol H
number of hydrogen atoms = 0.0953 mol H * Avogadro's number = 17 hydrogen atoms
mass of carbon = 49.3 g C / 100 g lysine = 0.493 g Cnumber of carbon atoms = 0.493 g C / 12.01 g/mol = 0.0409 mol C
number of carbon atoms = 0.0409 mol C * Avogadro's number = 7 carbon atoms
mass of oxygen = 21.9 g O / 100 g lysine = 0.219 g O
number of oxygen atoms = 0.219 g O / 16.00 g/mol = 0.0137 mol O
number of oxygen atoms = 0.0137 mol O * Avogadro's number = 9 oxygen atoms
Since each molecule of lysine contains two nitrogen atoms, the formula for lysine must be C7H17N2O3.
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a student gave a molecule the following incorrect name: 2-ethyl-3-methyl-5-propylhexane. what is the correct (iupac) name for the molecule? a) 3,4-dimethyl-6-propylheptane b) 2-propyl-4,5-dimethylheptane c) 4,6,7-tetramethylnonane d) 1,2-diethyl-3,6,7-trimethyloctane e) 3,4,6-trimethylnonane
The correct IUPAC name for the molecule is option c) 4,6,7-tetramethylnonane.
To name the molecule, we start by identifying the longest continuous carbon chain, which in this case contains nine carbon atoms. We number the chain from the end that gives the substituents the lowest possible numbers, which gives us the numbering 1-2-3-4-5-6-7-8-9.
The molecule has three branches: a propyl group on carbon 5, an ethyl group on carbon 2, and a methyl group on carbon 3. We name these branches as substituents and indicate their positions with their respective numbers. Therefore the correct IUPAC name for the molecule is 4,6,7-tetramethylnonane.
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2. What characteristic must a scientific
experiment have for it to be valid? A
clever
B replicable
C complex
D long
Clever is the characteristic that a scientific experiment must have to be valid. Therefore, the correct option is option A.
What is scientific experiment?An experiment, in its most basic form, is just the testing of a theory. In turn, a hypothesis is a suggested relationship or explanation for a phenomenon.
The experiment is the cornerstone of the scientific method, that is a methodical approach to learning about the world around you. Although some experiments are conducted in laboratories, an experiment can be conducted anywhere, at any time. Clever is the characteristic that a scientific experiment must have to be valid.
Therefore, the correct option is option A.
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which is true for the mineral characteristic known as streak? question 1 options: streak is the color of the mineral when it is powdered all minerals have a streak streak is the color of the impurities found within the crystal structure. streak is the same as the visible color of the mineral.
Streak is the color of the mineral when it is powdered. This property is useful for identifying minerals, as the streak of a mineral is often different from its visible color.
For example, hematite, which appears as a dull red or brown in its natural form, has a streak that is a bright red color. This property is determined by rubbing the mineral on a piece of unglazed porcelain, which leaves behind a streak of the powdered mineral. Streak can be affected by the presence of impurities in the mineral, but in general, it is a reliable way to identify a mineral.Streak is a physical property of minerals that refers to the color of the powdered form of a mineral. It is determined by rubbing the mineral on an unglazed porcelain plate, which leaves behind a streak of the mineral's powder. Streak is a useful tool for mineral identification, as it can often be more consistent and distinct than the visible color of a mineral. For example, some minerals may have variable visible colors due to impurities, but their streak will be consistent. Streak can also be used to distinguish between minerals that may look similar but have different properties.
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which features make H2O a polar molecule? select all that apply
-the molecule has a bent molecular shape
-the molecule has an uneven distribution of electron density
-the electrons are distributed unevenly within each bond of the molecule
-each H2O molecule has a different shape
-the molecule is electrically charged
The features that make H₂O a polar molecule are:
The molecule has a bent molecular shape.The molecule has an uneven distribution of electron densityThe electrons are distributed unevenly within each bond of the moleculeWhat is a polar covalent bond?It is a bond that occurs when the bonding atoms have a difference in electronegativity causing the generation of an area with higher electron density creating a positive pole and a negative pole.
The oxygen atom in water has a partial negative charge, while the hydrogen atoms have a partial positive charge. This results in an overall dipole moment, with the molecule having a slightly positive end and a slightly negative end.
H₂O is a polar molecule due to its bent molecular shape, an uneven distribution of electron density, and uneven electron distribution within each bond of the molecule. This results in an overall electrical charge for the molecule.
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'X' is a compound has very high melting point and is brittle while 'Y' has low melting point and is a gas. What are the types of compounds 'X' and 'Y' and differentiate them by the following two properties:
a) conductivity
b) solubility in water
X is an electropositive metal as it loses electrons and Y is a non-metal as it gains electrons.
Compounds formed between metal and nonmetal are ionic compounds.
What is a compound?
Compounds are substances created by mixing two or more different chemical elements in a specific order. A compound and a mixture are occasionally mistaken for one another, but they have significant differences. Although substances are united in a mixture, no chemical reaction or bonding similar to that found in compounds occurs. In a combination, the constituent elements each retain their unique characteristics and can be broken down into their constituent parts. Examples of mixes include air, saltwater, and liquid dish soap.To know more about compound, click the link given below:
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IS ANYONE GOOD AT CHEMISTRY?? I need help pleaseeeee
I need the answers on how to get the answer for scratch work to turn in
the wavelength of a single photon of UV-A electromagnetic radiation that possesses an energy of 6.2 x 10^-19 J is approximately 3.210 x 10^-5 cm. The option closest to this answer is 3.2 x 10^-5 cm.
explain about energy ?
The energy E of a photon is related to its wavelength λ by the following formula:
E = h * c / λ
where h is the Planck's constant, c is the speed of light in a vacuum, and λ is the wavelength of the photon.
We are given the energy of a single photon of UV-A electromagnetic radiation as 6.2 x 10^-19 J. The values of h and c are:
h = 6.626 x 10^-34 J s
c = 2.998 x 10^8 m/s (the speed of light in a vacuum)
To convert the wavelength to centimeters, we can use the conversion factor of 1 m = 100 cm.
Now we can rearrange the formula to solve for the wavelength λ:
λ = h * c / E
Substituting the given values, we get:
λ = (6.626 x 10^-34 J s) * (2.998 x 10^8 m/s) / (6.2 x 10^-19 J)
λ = 3.210 x 10^-7 m = 3.210 x 10^-5 cm (after conversion)
Therefore, the wavelength of a single photon of UV-A electromagnetic radiation that possesses an energy of 6.2 x 10^-19 J is approximately 3.210 x 10^-5 cm. The option closest to this answer is 3.2 x 10^-5 cm.
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a buffer consists of equal concentrations of hf and . what happens to the ratio of actually in solution as a strong base, , is added to the equilibrium?
When a strong base is added to a buffer solution containing equal concentrations of a weak acid and its conjugate base, the equilibrium of the buffer shifts towards the conjugate base, and the ratio of weak acid to conjugate base changes.
A buffer solution consists of a weak acid (HF) and its conjugate base (F-). When a strong base, such as NaOH, is added to the buffer solution, the base will react with the weak acid to produce more of its conjugate base and less of the weak acid. This will shift the equilibrium of the buffer towards the conjugate base and increase the concentration of the F- ion in the solution.
However, the buffer is designed to resist changes in pH, so the effect of the added base will be somewhat limited. The buffer will work to restore the original pH by reacting with some of the added base to produce more of the weak acid. As a result, the ratio of the weak acid to its conjugate base will change, but the change will be relatively small.
The key feature of a buffer solution is its ability to resist changes in pH, so even though the ratio of weak acid to conjugate base will change, the overall pH of the solution will change only slightly. This makes buffer solutions useful for maintaining a stable pH in a wide range of applications, such as biological systems and chemical processes.
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warm-blooded animals employ ______ to regulate the temperatures of the body
a) radiation
b) conduction
c) convection
Warm-blooded animals employ radiation to regulate the temperatures of the body. Therefore, the correct option is option A.
What is warm-blooded animal?The term "warm-blooded" relates to animal species that bodies sustain a temperature higher than the ambient temperature. Homeothermic creatures (birds and mammals included) control metabolic activities to maintain a constant body temperature. The degree of thermoregulation in other animals varies.
Because animals employ more than two methods of temperature regulation, the terms "warm-blooded" and "cold-blooded" have become derogatory within the scientific community. Warm-blooded animals employ radiation to regulate the temperatures of the body.
Therefore, the correct option is option A.
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What is the boiling point, in °C, of a 0.527 m aqueous solution of LiBr?
BP(water) = 100 °C
Kb (water) = 0.512 °C/m [ ? ] °C
To solve this we must know the concept behind the phenomenon of elevation in boiling point when a non volatile solute is added to any solvent. Therefore, boiling point in °C of a 0.527 m aqueous solution of LiBr is 100.54 °C.
Mathematically,
ΔT= Kb× molality
The complete balanced equation can be written as
LiBr → Li⁺ + Br⁻ [two ions]
substituting all the given values in the above mathematical expression, we get
(0.527 m LiBr) x (2 mol ions / 1 mol LiBr) = 1.054 m ions
(0.512 °C/m) x (1.054 m) = 0.540 °C change
100.00°C + 0.540 °C = 100.54 °C
Therefore, the boiling point in °C of a 0.527 m aqueous solution of LiBr is 100.54 °C.
What is elevation in boiling point ?
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If the plant Ben used is a water plant, what is the variable he should record to find out the rate of photosynthesis?
To measure the rate of photosynthesis in a water plant, the variable Ben should record is the change in dissolved oxygen levels.
What is photosynthesis?Photosynthesis is the process by which plants convert light energy into chemical energy, which is stored in the form of carbohydrates. One of the byproducts of photosynthesis is oxygen, which is released into the surrounding water. By measuring the change in dissolved oxygen levels over time, scientists can determine the rate at which the plant is producing oxygen through photosynthesis.
In addition to dissolved oxygen levels, other variables that can be recorded to determine the rate of photosynthesis in water plants include the rate of carbon dioxide uptake, the rate of change in chlorophyll fluorescence, and the rate of change in pH levels
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When I do (10*1000)/(1x10^-6) I don’t get that answer what am I doing wrong
One gram is 10⁶ micrograms. One kilogram is 1000 grams. Then 1 kg is 10⁹ micrograms. Therefore, 10 kg is equal to 10¹⁰ grams.
What are mass units ?Mass of a substance is the measure of its total amount. Mass is an extensive unit. Mass can be expressed in various units. The SI unit of mass is grams.
We know that,1 kg = 1000 g = 10³ g.
one microgram = 10⁻⁶ g or,
one gram = 10⁶ micrograms.
Now, one kg = 10³ g, then,
one kg = 10³× 10⁶ micrograms = 10⁹ micrograms.
Then micrograms equivalent to 10 kg is 10 times the amount in 1 kilogram
that is, 10 kg = 10 ×10⁹ micrograms = 10¹⁰ micrograms.
This way, you will get the correct answer.
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why was it necessary to use different concentrations of aqueous isopropanol in the step gradient separation?
The use of different concentrations of aqueous isopropanol in a step gradient separation is often done to achieve a better separation of molecules or compounds in a sample.
The use of different concentrations of aqueous isopropanol in a step gradient separation is often done to achieve a better separation of molecules or compounds in a sample.
In step gradient separation, a series of solutions with increasing or decreasing concentrations of a solvent is used to separate molecules based on their different affinities for the solvent. By gradually changing the solvent composition, molecules with different properties (such as size, polarity, or charge) can be separated from each other.
In the case of aqueous isopropanol, changing the concentration of isopropanol in the solution can change the polarity of the solvent system. This can be useful for separating molecules that have different polarities, as they will have different affinities for the solvent at different concentrations.
For example, in a mixture of polar and nonpolar compounds, a low concentration of isopropanol may be more effective at eluting the polar compounds, while a higher concentration may be needed to elute the nonpolar compounds. By using a series of solutions with different isopropanol concentrations, a step gradient separation can be achieved that separates the different compounds in the mixture.
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Continuing from the last question, what is the new pressure inside the container?
Hint: Did we use up all of the reactants?
Answer:
3 atm
Explanation:
why is sodium (atomic number 11) inclined to lose an electron to become sodium ion (na ), while chlorine (atomic number 17) is inclined to take up an extra electron to become chloride ion (cl-)?
The inclination to lose/gain an electron is due to their electron configurations and the resulting stability, sodium tends to lose an electron to become a positively charged ion, while chlorine tends to gain an electron to become a negatively charged ion.
Sodium has an electron configuration of 1s2 2s2 2p6 3s1, meaning it has one valence electron in its outermost shell. It is energetically favorable for sodium to lose this electron and achieve a full valence shell, which would give it the electron configuration of a noble gas (neon), 1s2 2s2 2p6. This stable configuration is achieved by the loss of one electron, which forms a positively charged ion with a full outer shell.
On the other hand, chlorine has an electron configuration of 1s2 2s2 2p6 3s2 3p5, meaning it has seven valence electrons in its outermost shell. It is energetically favorable for chlorine to gain one electron to achieve a full valence shell, which would give it the electron configuration of a noble gas (argon), 1s2 2s2 2p6 3s2 3p6. This stable configuration is achieved by the gain of one electron, which forms a negatively charged ion with a full outer shell.
ThereforeThis process of electron transfer allows both atoms to achieve a stable electron configuration and become more energetically stable.
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What mass of aluminium oxide is produced when 9.2 g of aluminium reacts with oxygen?
Answer:
The reaction between aluminum and oxygen to produce aluminum oxide can be represented by the chemical equation:
4 Al + 3 O2 → 2 Al2O3
The number of moles of aluminum can be calculated as follows:
9.2 g Al ÷ 26.98 g/mol = 0.34 mol Al
Since the reaction ratio is 4 Al to 2 Al2O3, the number of moles of aluminum oxide produced is half the number of moles of aluminum:
0.34 mol Al ÷ 2 = 0.17 mol Al2O3
Finally, the mass of aluminum oxide produced can be calculated as follows:
0.17 mol Al2O3 × 101 g/mol = 17.2 g Al2O3
Explanation:
if a bullet makes an oval shaped hole as it moves through glass, it entered the glass how? a. straight on b. at an angle c. from the top d. from the bottom
The correct option is b. at an angle; If a bullet passes through glass and leaves an oval-shaped hole, it entered the glass at an angle.
Explain the formation of oval-shaped hole?An oval resembles the form, contour, or shape of an egg.
Take a moment to picture yourself grabbing your favourite ball as well as squeezing it in your hands. You would observe an oval-shaped object. The uneven curves and strange, semi-round egg form of the ball would prevent it from rolling or throwing as smoothly if you were to maintain that shape.Every shape contains characteristics, such as the flat shapes that can detect and outline on an object, such as edges, corners, and faces.For instance:
A square has a square face, four sides, and four corners.Four sides, four corners, and a rectangle's face make up a rectangle.Thus, If a bullet passes through glass and leaves an oval-shaped hole, it entered the glass at an angle.
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How many MOLES of AICI3 are in 215 GRAMS of AICI3?
215 grams of AlCl₃ is equal to 1,61 moles of AlCl₃. The relative molecular mass of the compound AlCl₃ is 133.5 grams/mol.
The mole is one of the basic units used to indicate the amount of substance in the international system of units. The equation for calculating moles is mol = mass / relative atomic mass. To find out the mol of AlCl₃ you can use the following steps
Step 1: Calculate the relative molecular mass for the compound AlCl₃.
Mr AlCl₃ = ( Ar Al × ∑Al ) + ( Ar Cl × ∑Cl)
= ( 27 gam/mol × 1) + ( 35,5 gram/mol × 3)
= 27 gram/mol + 106,5 gram/mol
= 133,5 grams/mol
Step 2: Calculate the moles of the compound AlCl₃.
n AlCl₃ = mass AlCl₃ ÷ relative molecular mass AlCl₃
= 215 grams ÷ 133,5 grams/mol
= 1,61 mol
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a certain metal oxide has the formula mo. if a 39.46 g sample of mo is heated in an atmosphere of hydrogen to remove all of the oxygen as h2o, and 31.70 g of m is left over, which metal is m?
This atomic mass corresponds to the metal iron (Fe). Therefore, the metal in the MO compound is iron (Fe).
The given chemical formula of the metal oxide is MO, where M represents the metal cation. When the sample of MO is heated in an atmosphere of hydrogen, the oxygen from the metal oxide reacts with hydrogen to form water vapor. The balanced chemical equation for this reaction can be written as:
MO + H2 → H2O + M
Here, one mole of MO reacts with one mole of H2 to produce one mole of water vapor and one mole of metal M. Using the molar mass of MO, which is the sum of the atomic masses of M and O, we can calculate the number of moles of MO present in the given sample:
Molar mass of MO = atomic mass of M + atomic mass of O
= M + 16
Mass of MO = 39.46 g
Number of moles of MO = mass of MO / molar mass of MO
= 39.46 g / (M + 16)
Now, according to the problem, all the oxygen in MO is removed, leaving behind 31.70 g of M. From the balanced chemical equation, we know that the mass of M produced is equal to the initial mass of MO minus the mass of water vapor produced. The molar mass of water is 18 g/mol, so the number of moles of water produced is:
Number of moles of H2O = mass of H2O / molar mass of H2O
= mass of oxygen removed / 16
= (39.46 g - 31.70 g) / 18
= 0.43 mol
Therefore, the number of moles of M produced is also 0.43 mol. We can use this value and the number of moles of MO calculated earlier to write an equation that relates the atomic mass of M to the number of moles of M:
0.43 mol = 39.46 g / (M + 16)
Solving for M gives us:
M = 55.85 g/mol
This atomic mass corresponds to the metal iron (Fe). Therefore, the metal in the MO compound is iron (Fe).
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What are some possible areas in the homeland at school
where energy usage can be easily reduced?
Write 4 sentence explaining
Answer:
1. Shower instead of bathing.
2. When you leave the room, turn off everything.
3. Grow a Tree
4. Bicycle or walk to school.
Explanation:
As global temperatures rise, wildfires, droughts, and increased electrical consumption place strain on the country's energy system. Severe weather is the main cause of power outages and fuel supply disruptions in the United States. And, because energy generation is one of the greatest producers of CO2 to the climate, people and students alike must have the information and abilities to comprehend the issues, create and execute solutions, and advocate for change.
Why do quartz and glass both have very high melting points?
please can someone give an explanation
Covalent bonding is present in Quartz. Covalent bonds result in a high melting point. Covalent solids are insoluble in most solvents.
Why does quartz have such a high melting point?Quartz is very hard to melt because quartz is unsteady above 870 Celsius, and molten silica is wobbling below 1713 Celsius. In the interval between 870 and 1713 degrees, quartz tends to change to tridymite or cristobalite, not melt. It is hard to heat quartz to melt, in the region of 1650 Celsius
Melting point: The melting point of quartz is higher than 1700°C. Curie temperature for alpha and beta quartz: The Curie warmth for quartz is 573°C.
So we can conclude that Crystal quartz has a very particular melting point. Because quartz glass is a single component it doesn't form eutectics
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What is the name of CoCl2•6H20?
Answer:
The name of the chemical compound CoCl2•6H2O is cobalt(II) chloride hexahydrate.
which of the following statements describes lattice energy? select the correct answer below: it is the energy stored in the intermolecular attractions that hold particles together in an ionic solid. it is the energy of a solute. it is the amount of enthalpy change that occurs when 1mol of ionic solid is converted into gaseous ions. all of the above
Option A: It is the amount of energy stored in the intermolecular attractions that hold particles together in an ionic solid, and option C: it is the amount of enthalpy change that occurs when 1mol of ionic solid is converted into gaseous ions, describes lattice energy.
The enthalpy change required to convert one mole of an ionic solid into gaseous ionic components is known as lattice energy. The strength of the ionic bonds in an ionic compound is gauged by lattice energy. It holds the particles together in a molecule. Thus, option A and C describes lattice energy. It sheds light on a number of ionic solids' characteristics, such as their solubility, hardness, and volatility.
The lattice energy of an ionic solid cannot be measured directly, but only be detected with Born-Haber cycle. It is expressed in terms of kilo-joule per mole, KJ/mol.
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2. Explain why the drop of water on the wax paper is "very round" in comparison to the drop on the glass is more flat use the term either hydrophobic or hydrophilic
The water droplet on wax paper is round and flat on a glass surface, this is because of the hydrophobic and hydrophilic properties of water.
The water drop on wax paper is very round in comparison to the one on a glass which is flatter, this indicates the property of cohesion of water molecules, this is due to gravity.
On the other hand, when the water droplet is on wax paper it is way rounder in shape and attracted to the wax paper called as adhesion.
Hydrophobic literally means "fear of water."
In chemistry, it could be said it's the physical property of molecules that are repelled from a mass of water. This is the case with wax paper where its can't get absorbed or fail to mix and rather tend to repel.
Hydrophile is basically opposite of hydrophobic which is the molecules attracted to water. A hydrophile is a molecule or other molecular entity that is attracted to water molecules and tends to be dissolved by water.
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3AgNO3 + Na3PO4 -> Ag3PO4 + 3NaNO3
Silver nitrate and sodium phosphate are reacted in equal amounts of 200 g each.
How many grams of the excess reagent is left over?
The balanced chemical equation for the reaction is as follows: 3AgNO3 + Na3PO4 -> Ag3PO4 + 3NaNO3
What is balanced chemical?A balanced chemical equation is a chemical equation in which the number of atoms for each element in the reaction's reactants and products are equal. This means that the same number of atoms of each element is conserved and that the equation is balanced. In other words, a balanced chemical equation follows the law of conservation of mass, which states that matter can neither be created nor destroyed.
Since the amounts of both reactants are equal (200 g each), the same amount of each will be consumed in the reaction. This means that 200 g of each reagent will be used and there will be no excess reagent. Therefore, the answer is 0 g of excess reagent.
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what type of bond results from the end‑on overlap of orbitals?
Sigma bonds are formed by the end-on overlap of orbitals. A sigma bond ([tex]\sigma[/tex] bond) is a type of bond formed by the overlapping of orbitals in an end-to-end fashion.
There are two types of bonding. They are:
Sigma bond.Pi bond.A pi bond ([tex]\pi[/tex] bond) is a type of bond formed by the overlapping of the orbitals in a side-by-side fashion. One pi bond and one sigma bond are present in an alkene. Two pi bonds and one sigma bond can be found in alkynes.
Both the structure and the reactivity are greatly impacted by this. The head-on intersection of two sp orbitals results in the formation of the sigma bond. The side-on overlapping of 2p orbitals results in the formation of pi bonds.
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By titration, 15 mL of aqueous H₂SO4 neu-
tralized 25.6 mL of 0.0193 M LiOH solution.
What was the molarity of the aqueous acid
solution?
Answer in units of M.
The concentration of the acid is 0.016 M
What is neutralization reaction?A neutralization reaction is a chemical reaction in which an acid and a base react to form a salt and water. The reaction occurs when the hydrogen ions (H+) from the acid react with the hydroxide ions (OH-) from the base to form water (H2O). The salt that forms depends on the specific acid and base that are reacted.
Using;
CAVA/CBVB = NA/NB
CA = concentration of acid
CB = concentration of base
VA = volume of acid
VB = Volume of base
Then;
CAVANB = CBVBNA
CA = CBVBNA/VANB
CA = 0.0193 M * 25.6 mL * 1/15 mL * 2
CA = 0.016 M
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Threat and risk assessment of a suspect is referred to as
O suspect-based profiling
O geographical profiling
O crime scene profiling
O psychological profiling
Assessment of a suspect's threat and risk is referred to as "suspect-based profiling".
Explain about the suspect-based profiling?Understanding the numerous risks to your IT systems, assessing the amount of risk to which these systems are exposed, and suggesting the proper level of protection all require the use of a Threat and Risk Assessment (TRA).
In order to support informed risk-based decision-making, a STRA is the whole activity of assessing as well as reporting privacy issues for just an information system. Risk assessments and proposed interventions are also recorded in a STRA. Threat assessments look into problems as they arise or are tried, whereas risk assessments examine a wider range of possibilities to identify any prospective difficulties and the potential scope of damage. Providing suggestions that maximise the protection information confidentiality, integrity, and availability while maintaining functioning is the goal or conclusion of a threat and risk assessment.Thus, assessment of a suspect's threat and risk is referred to as "suspect-based profiling".
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What are atoms of the same element that have different mass numbers?
Answer:
isotope
Explanation:
which of the following factors is not involved in the downwelling responsible for the thermohaline circulation? a. evaporation b. low precipitation c. warm surface currents d. freezing of sea water
Option (d) is correct. Freezing of sea water is not responsible for the thermohaline circulation.
Thermohaline circulation is defined as the movement of ocean water caused by density difference brought about by variations in temperature and salinity. As ocean water freezes at the poles it concentrates salt and the colder and denser water sinks. It is a part of the large scale ocean circulation that is driven by global density gradients created by surface heat and freshwater. The term thermohaline derives from word "thermo", referring to temperature and "haline", referring to salt content. Both together determine the density of sea water. Thermohaline circulations occur in certain marginal seas associated with warm waters rendered dense by their high salinity resulting from evaporation.
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) 4 (N₂C1) + H₂0 C •List the amount of Molecules Of each element
One mole of every elements contains 6.02 × 10²³ atoms. Then, 4 moles of N₂ contains 2.4 × 10²⁴ molecules . one mole of water contains 6.02 × 10³¹ molecules.
What is Avogadro number ?One mole of a substance is its amount containing 6.02 × 10²³ atoms or molecules. This number is called Avogadro number. One mole of every elements contains Avogadro number of atoms.
Similarly one mole of every compound contains 6.02 × 10²³ molecules. The mass of one mole of compound is called its molar mass.
Given that there are 4 moles of the compound. One mole of every N₂ 6.02 × 10²³ molecules. Then, 4 moles of N₂ contains 2.4 × 10²⁴ molecules
One mole of water contains Avogadro number of water molecules. One formula unit of water contains 2 hydrogens and one oxygen. Then, there are 2.4 × 10²⁴ hydrogen atoms and 6.02 × 10²³ oxygens.
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Your complete question is as follows:
Given the reaction below: List the amount of Molecules Of each element in the reactant side.
4 N₂ (g)+ H₂O (l)
