The HCN that is the hydrogen cyanide is the polar compound. The molecule of the hydrogen cyanide is not the symmetric.
The Hydrogen cyanide consists of the linear structure. It has the carbon atom that lies in between the hydrogen and the nitrogen atoms. There are the two polar bonds present in the hydrogen cyanide. The Hydrogen cyanide is the polar compound. The molecule is not the symmetric. The nitrogen atom and the hydrogen atom have the different electronegativities, that will create the uneven pull on the electrons. Therefore there is a net dipole moment.
Thus, The HCN is the polar compound.
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The reaction Fe (s) + Cl2 (g)→ FeCl2 (s) has a ΔH=−342kJ .
How much heat will be required to produce 1 mole of Fe by the reverse reaction?
A. -342 kj
B. -172 kj
C. 342 kj
D. 684 kj
Answer:
-342kj
Explanation:
Just did the test.
1 mole of Fe by the reverse reaction The correct answer is D. 684 k.
What is mole?Mole is a unit of measurement used in chemistry to measure the amount of a substance. The mole is equal to the atomic mass of a substance expressed in grams. It is used to measure the amount of a substance, usually in moles per liter. The mole is also used to calculate the number of atoms, molecules, and other particles in a given volume or mass. The mole is an important concept in chemistry, and is used in many calculations related to chemical reactions, such as the calculation of molecular weights, reaction rates, and stoichiometry.
The reverse reaction of Fe (s) + Cl2 (g) → FeCl2 (s) is FeCl2 (s) → Fe (s) + Cl2 (g). The change in enthalpy (ΔH) is the amount of energy released or absorbed in a chemical reaction. In this case, the reaction has a ΔH of -342 kJ, meaning that 342 kJ of energy is released. To produce 1 mole of Fe by the reverse reaction, 684 kJ of energy must be absorbed, which is equal to twice the ΔH of -342 kJ. Therefore, the correct answer is D. 684 kJ.
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the instructor reveals that the weak acid is hypochlorous acid, hocl. the known ka for hocl is 4.0×10-8. what is the percent error in the experiment?
The percent error in the experiment is 12.5%
What is a Percentage Error?When comparing the estimated value to the actual value, the percent error is the difference, and it is given as a percentage.
How to find the percent error,
Let us find the % error in the experiment:
Given [tex]K_a = 4.0 * 10^-^8[/tex]
Original; Ka= 3.5 x 10^-8
Percent error = accepted value - experimental value/accepted value x 100
= 4.0 x 10^-8 - 3.5 x 10^-8/4.0 x10^10^-8 x 100
= 12.5%
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which tells us more about an element's properties, its row or its column? Why is this?
Column tells us more about properties of an element in periodic table. Columns are also known as groups.
In a modern periodic table, atoms with comparable properties are grouped in the same vertical column and the elements are arranged in increasing order of their atomic number. With its atomic number, symbol, average atomic mass, and (occasionally) name, each box symbolizes an element. The components are arranged in 18 vertical columns called groups and seven horizontal rows known as periods or series. Each column's header lists the names of its groups. Roman numerals and capital letters have typically been used on labels in the United States. The IUPAC advises using the numbers 1 through 18, and these markings are more widely used. Parts of two of the rows, totaling 14 columns, are typically written below the primary table in order for it to fit on a single sheet.
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draw the structure of 3‑methylbenzoic acid in the space.
The prefix "3-" in the name serves as a reminder that the 3-methyl group (CH3) is joined to the benzene ring at the third carbon position (counting from the carboxylic acid group).
The benzene ring has a carboxylic acid functional group (-COOH) joined to it at the first carbon position. Acid 3-methylbenzoic An organic substance with the chemical formula C8H8O2 is 3-methylbenzoic acid. It is a member of the family of aromatic carboxylic acids known as benzoic acids. The melting point of 3-methylbenzoic acid, a white crystalline solid, is 167–169 °C. It is only weakly soluble in water, although it is soluble in ethanol and ether, among other organic solvents. It frequently serves as a fundamental component in the creation of other organic compounds.
[tex]CH3 | / \ / \ / \H3C O // / \ / \ / \ / \ C OH \ / \ / \ / \ / C | C | C | H[/tex]
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You have 1 Liter of water and 1 Liter of orange juice. Explain how you would make a 50% solution of orange juice. EXPLAIN YOUR ANSWER.
Unpulped orange juice is a homogeneous combination. It's frequently referred to as a fix. No matter what portion of the combination we are looking at, the components are evenly dispersed.
How might one weaken a solution?Dilution is indeed the process of lowering a solute's concentration in a solution. It usually just involves mixing the solution with more solvent, such more water. A solution is diluted when more solvent is added without increasing solute.
What occurs when juice is diluted with water?As long as your serving size stays the same, diluting a sweet beverage with water reduces its calorie count. So if you decrease your sweet beverage yet still If you finish the entire drink, you won't actually consume fewer calories.
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True or False: Polyjuice potion allows the drinker to change to species?
The Polyjuice potion does not allow the drinker to change species. Hence, the given statement is False.
What is Polyjuice potion?Polyjuice Potion is described as a concoction that gave its user the ability to take on the appearance of another person which was actually a difficult, time-consuming, and difficult concoction. Even experienced witches and wizards found it difficult to properly prepare Polyjuice Potion because of its complexity.
This potion allows the taker to assume the physical appearance of another person which takes a month to make that must contain the part of the person we wish to appear. Polyjuice potion does not allow the drinker to change species. We can change age, sex and race by consuming the Polyjuice Potion, but not species.
Therefore, the given statement is false.
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how to find the number of neutrons
The number of neutrons in an atom can be found by subtracting the atomic number (number of protons) from the mass number (number of protons plus neutrons).
The mass number is typically found in the atomic symbol, which is written as follows: A X
Where A is the mass number (number of protons plus neutrons) and X is the chemical symbol of the element. The atomic number is usually written as a subscript to the left of the chemical symbol, as follows: A X Z
Where Z is the atomic number.
To find number of neutrons, simply subtract atomic number from the mass number:
Number of neutrons=Mass number-Atomic number
For example, the element carbon has an atomic number 6 and its mass number will be 12. To find the number of neutrons in a carbon atom, we subtract the atomic number from the mass number:
Number of neutrons= 12-6 = 6
Therefore, a carbon atom has 6 neutrons.
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where Kf is the freezing point depression constant and m is the molality of the solution. Which of the statements explains why molality is used instead of molarity in this equation? A. Molality does not appear in many equations, so it is used here to distinguish this equation from other similar ones. B. As the temperature of a solution changes, its volume will also change, which will affect its molarity but not its molality. C. In solutions, moles are not directly related to grams and the freezing point of a solution is dependent solely on the number of grams of solute. D. The equation was originally published with m as a typo, rather than M, but the values are close enough that the equation is still valid.
The statement that explains why molality is used rather of molarity in the freezing point depression equation is B. As the temperature of a result changes, its volume will also change, which will affect its molarity but not its molality.
Molality is defined as the number of intelligencers of solute per kilogram of detergent, whereas molarity is defined as the number of intelligencers of solute per liter of result. Since the volume of a result can change with temperature, the attention of a result measured in molarity can be affected by changes in volume. This can lead to inaccuracies in computations involving changes in temperature, similar as in the freezing point depression equation. In discrepancy, molality is a measure of attention that isn't affected by changes in volume because it's grounded on the mass of the detergent, which is assumed to remain constant indeed as the temperature changes. thus, molality is the more applicable attention unit to use in the freezing point depression equation, which is dependent on the attention of the solute and not on the volume of the result.
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Which is NOT an example of a pure substance? A) Water. B) Air. C) A block of dry ice. D) Aluminum foil. E) Sugar
Option (b) is correct. Air is not an example of pure substances. Because it s made up of many substances and it does not have fixed formula.
A substance is said to be a pure substance which is a material that is free of impurities or contaminants. It has a constant chemical composition. No matter where you sample a pure substance, it is the same. Elements are the examples of pure substances. They consist of individual atoms, ions, or molecules. A pure chemical substance is a form of matter having constant chemical composition and characteristic properties. These chemical substance cannot be separated into its constituent elements by physical separation methods that is without breaking chemical bonds. AIr is not an example of pure substances.
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Which of the following cannot form hydrogen bonds with water?
a. CH₃OCH₃
B. NA⁺
C. F⁻
D. HCOOH
The one from the following which cannot form the hydrogen bonds with the water is the Na⁺. The correct option is B.
The hydrogen bond is the interaction that involves the hydrogen atom that is present in between the pair of the other atoms having the high affinity for the electrons and such the bond is the weaker than the ionic bond or the covalent bond but this bond is stronger than van der Waals forces. The hydrogen bond is the type of an intermolecular force (IMF) that will forms the special type of the dipole - dipole attraction .
Thus, as there is no electronegative atom in the Na⁺, therefore, it cannot form the hydrogen bond with the water.
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how many grams of sulfur make up 1.55 mol of sulfur?
49.70075 grams of sulfur make up 1.55 mol of sulfur. Sulfur atoms have masses of 32.07 amu and 32.07 g per mole, respectively.
G/mol units are the starting point for calculating molar mass. We can find out how many grams make up one mole of a chemical molecule by computing its molecular weight. The weight of a particular formula is just the sum of the atomic masses of all the constituent parts.
The National Institute of Standards and Technology, or NIST, provided the atomic weights used on this website. We employ the most typical atoms. This is how isotropically weighted averages are used to determine the molar mass (average molecular weight). This differs from molecular mass, which is the weight of a singular molecule made up of distinct isotopes. For computations involving bulk stoichiometry, Typically, we are calculating molar mass, also known as normal atomic weight or average atomic masses.
1 gram of sulfur equals how many moles? 0.031186652112896 is the correct response.
It is assumed that you are changing between grams and moles of sulfur.
sulfur's chemical weight in grams
Sulfur's chemical formula is S.
The mole is the SI base measure for substance amount.
Sulfur has a molecular weight of 1 mole, or 32.065 grams.
Rounding errors could happen, so make sure to always double-check your findings.
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please answer thanks
Answer:
my answer us that filter is used to seperate solution or solid and liquid combination
What is an electron transport chain and what is its role during the light reactions?
Answer :
An electron transport chain (ETC) is a series of proteins and other molecules embedded in a membrane, which transfer electrons from one molecule to the next. The ETC plays a key role in cellular respiration, photosynthesis, and other metabolic processes that involve the transfer of energy in living cells.
During the light reactions of photosynthesis, the ETC is located in the thylakoid membrane of the chloroplast. Its role is to transport electrons and protons from water to NADP+ (nicotinamide adenine dinucleotide phosphate) to form NADPH, which is a key energy carrier in photosynthesis.
In summary, the electron transport chain is a crucial component of the light reactions of photosynthesis, where it helps to generate energy-rich molecules (NADPH and ATP) that are used in the next stage of photosynthesis, the Calvin cycle.
Which method could you use to
encourage more product, H2, to form
from the reaction below?
CH 4 (g)+2H 2 S(g)
We need to add more of the CH4 or H2S
How do you drive the reaction to the right hand side?We know that the reaction as we can see has to do with the combination of the methane molecule and the hydrogen sulfide. In the case of the reaction that we have, we are looking at the way that we can use to push the reaction to the right so that we can have more H2 in the system.
If we add more of the CH4 to the system or we happen to add more of the H2S to the system then we are going to have more of the H2 formed as we know.
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Answer: Remove Cs2
Explanation: Acellus confirmed
what is sodium atomic number?
The atomic number of sodium is 11.
This means that an atom of sodium having 11 protons in its nucleus. The number of protons in an atom's nucleus will determines its atomic number and its place on the periodic table of elements. Sodium is a soft, silvery-white metal that is highly reactive and it is commonly found in nature as a compound, often with chloride (NaCl) to form a table salt.
It has a relatively low melting point and it is a good conductor of electricity. Sodium is an essential element for human health, as it plays a critical role in many biological processes.
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what is the name for the compound NO2
The compound NO₂ is named nitrogen dioxide.
It is a covalent molecule composed of one nitrogen atom and two oxygen atoms that are double bonded to the nitrogen atom. Nitrogen dioxide is a reddish-brown gas with a sharp, pungent odor. It is an important air pollutant, often produced by combustion processes, and can have harmful effects on human health and the environment.
In addition to its role as a pollutant, nitrogen dioxide is also used in various industrial processes, such as the production of nitric acid and as a rocket propellant. The name "nitrogen dioxide" reflects the composition of the molecule and follows the rules of IUPAC nomenclature for covalent compounds.
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a single electron in an orbital has quantum numbers n = 3, ℓ = 0, mℓ = 0, ms =-½. what are the quantum numbers for the next electron added to this orbital?
The quantum numbers for the next electron added to this orbital are n = 3, ℓ = 0, mℓ = 0, and ms = +½.
The quantum numbers for an electron in an orbital describe its energy level, angular momentum, magnetic moment, and spin. Based on the given quantum numbers for the first electron, we can determine the possible quantum numbers for the next electron added to this orbital.
The Pauli exclusion principle states that no two electrons in an atom can have the same set of four quantum numbers, so the quantum numbers for the second electron must be different from the first electron.
We know that the first electron has the following quantum numbers:
Principal quantum number (n) = 3
Azimuthal quantum number (ℓ) = 0
Magnetic quantum number (mℓ) = 0
Spin quantum number (ms) = -½
Since the azimuthal quantum number (ℓ) is 0, the first electron is in an s orbital. An s orbital can hold a maximum of 2 electrons, and when two electrons are in the same orbital, they must have opposite spins.
Therefore, the quantum numbers for the second electron added to this orbital must be:
Principal quantum number (n) = 3
Azimuthal quantum number (ℓ) = 0
Magnetic quantum number (mℓ) = 0 (since the s orbital has only one orientation)
Spin quantum number (ms) = +½ (since it must have the opposite spin to the first electron, which has ms = -½).
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A compound has the molecular formula C5H10O, and strong absorptions at 1100 and 3350 cm−1. Which is the most likely structure for the compound?A). Cyclopentanol. B). C-H. C). Hydrogen bonding. D. 2500-3300 cm-1.
Answer:
Explanation:
The strong absorption at 3350 cm−1 indicates the presence of an O-H group, while the absorption at 1100 cm−1 indicates the presence of a C-O bond. Based on this information and the molecular formula C5H10O, the most likely structure for the compound is cyclopentanol, which has the molecular formula C5H10O and contains both a C-O bond and an O-H group.
Therefore, the correct answer is (A) Cyclopentanol.
The answer choices (B) C-H and (C) Hydrogen bonding are not directly related to the given information about the absorption spectra and the molecular formula of the compound. The answer choice (D) 2500-3300 cm-1 is a range of absorption frequencies for N-H and O-H stretching vibrations, but the given information only refers to the absorption at 3350 cm−1, which is within this range and indicates the presence of an O-H group in the compound.
The compound with molecular formula C5H10O and strong absorption at 1100 and 3350 cm−1 is most likely Cyclopentanol, indicated by the presence of a hydroxyl group and C-O stretching.
Explanation:The molecular formula C5H10O represents a compound with 5 Carbon atoms, 10 Hydrogen atoms, and 1 Oxygen atom. Given the absorption bands at 1100 and 3350 cm−1 within the infrared spectrum, the compound is most likely to be Cyclopentanol. The strong absorption at around 3350 cm-1 suggests the presence of an hydroxyl (—OH) group, characteristic for alcohols. The 1100 cm−1 peak can be attributed to C-O stretching. The structure of Cyclopentanol includes a five-member ring of carbons with the OH group attached to one of the carbons.
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Arrange the different types of electromagnetic radiation by wavelength. Only include the items that are forms of electromagnetic radiation. longest wavelength shortest wavelength Answer Bank low frequency X-rays a high pitch sound wave high frequency X-rays red light gamma ray radiation infrared radiation Lowest frequency Highest frequency Answer Bank long-wavelength ultraviolet radiation a red photon an X-ray photon a blue photon short-wavelength ultraviolet radiation a water wave
The sunlight is a form of electromagnetic energy. The visible light is only a small portion of the electromagnetic spectrum. The electromagnetic spectrum consists of different range of frequencies.
What is electromagnetic spectrum?The electromagnetic spectrum consists of a large number of electromagnetic radiations which further consists of many subranges commonly referred to as portions. These can be again classified into infra-red radiation, visible light or ultraviolet radiation.
Each type of radiation has its own specific wavelength and frequency. The increasing order of wavelengths of electromagnetic radiation is given as:
Gamma rays < X rays < UV rays < Infrared rays < Microwaves < Radiowaves.
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what is perchloric acid formula?
The formula for perchloric acid is HClO₄.
Perchloric acid is a strong mineral acid that contains a central chlorine atom bonded to four oxygen atoms and a hydrogen atom. It is a colorless and odorless liquid that is highly corrosive and reactive, making it a potent oxidizer.
Perchloric acid is commonly used in laboratory and industrial settings for its strong oxidizing properties and ability to dissolve a variety of metals and organic compounds. It must be handled with care due to its potential to form explosive salts with organic materials and other reducing agents.
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:))))))))))))))))))))))))))
Answer:
Thermal Energy was transferred out of both Aquariums at the same rate
Answer:
Thermal energy was transformed at the same rate
Explanation:
:))))))))
Wich of the following statements best describes eutectic oomposition?
A. The composition of a mixture of two components that can never dissolve in one another.
B. The composition of a mixture of two components in an exact 1 :1 ratio.
C. The composition of a mixture of two components that generates the lowest possible melting point
D. The oomposition or a mixture of two components that generates the highest possible melting point.
C. The composition of a mixture of two components that generates the lowest possible melting point.
What is the formal charge of an oxygen atom that forms three bonds and has one lone pair?
A. -2
B. -1
C. 0
D. +1
E. +2
Answer: +1
Explanation: i took the test
as the temperature of an air mass increases, its volume ______ and density decreases.
As the temperature of an air mass increases, its volume increases, and its density decreases.
This is because warm air expands and takes up more space since its molecules move more quickly and widely. Although the volume has increased, the density has decreased since the same amount of air is now dispersed across a greater area. On the other hand, when air is chilled, its molecules slow down and close in on one another, which causes the air to constrict and increase in density.
Variations in air temperature and density can have a significant impact on weather and climate because they can alter how air masses behave, how clouds develop, and how air currents flow. So, understanding the relationship between temperature and density is crucial for forecasting and comprehending weather patterns as well as for making decisions regarding topics like air pollution and climate change.
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What is the bond angle of a tetrahedral?
The bond angle of a tetrahedral molecule is approximately 109.5 degrees. This is because a tetrahedron is a three-dimensional shape with four equivalent sp3 hybridized orbitals forming the corners of the tetrahedron.
Understanding Tetrahedral Bond AnglesThe bond angle of a tetrahedral molecule is one of the most fundamental and important concepts in chemistry. A tetrahedron is a three-dimensional shape with four equivalent sp3 hybridized orbitals forming the corners of the tetrahedron. These hybridized orbitals result from the combination of the s and p orbitals of the central atom, creating four orbitals that are directed towards the four corners of the tetrahedron.
Each orbital can form a bond with an adjacent atom or molecule, resulting in four identical bonds in a tetrahedral molecule. The ideal bond angle between adjacent bonds in a tetrahedral molecule is 109.5 degrees, which is due to the geometric arrangement of the orbitals around the central atom. The four orbitals are arranged such that they are as far apart from each other as possible, resulting in an angle of 109.5 degrees between adjacent bonds.
Examples of tetrahedral molecules include methane (CH4), which has four identical C-H bonds arranged around the central carbon atom, and carbon tetrachloride (CCl4), which has four identical C-Cl bonds arranged around the central carbon atom. The understanding of tetrahedral bond angles is important in various fields of chemistry, including organic chemistry, biochemistry, and materials science, and it provides a basis for understanding the properties and behavior of many molecules.
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The image shows how sodium is displayed in the periodic table with three characteristics labeled X, Y, and Z.
Which of the following examples is an exception to water as a universal solvent?
Because of its polar structure, which allows it to dissolve a wide variety of compounds, water is frequently referred to as a universal solvent.
What forms does sodium take in the natural world?Sodium makes up 2.6% of the Earth's crust and is the sixth most prevalent element on the planet. Over the course of the planet's existence, this highly soluble salt has been leached into the oceans, although many salt beds or 'lakes' are located where ancient seas have evaporated.
What makes sodium a metal?Because it is malleable, ductile, and an excellent conductor of electricity, sodium is a metal. Unlike carbon, which is neither glossy nor bendable and is a poor conductor of electricity, it may easily shed electrons from the valence shell.
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Which direction will heat energy transfer in this system, assuming the barrier is left in place
From the 300 K side
Back and forth
from the 75 k side
Heat energy will transfer from the 300 K side to the 75 K side due to the difference in temperature. The barrier will prevent the heat energy from transferring back to the 300 K side, so the heat energy will remain on the 75 K side.
What is Heat energy?Heat energy is a form of energy that is produced when molecules move faster and have more kinetic energy. It is the transfer of energy from a hotter object to a cooler object and is a form of thermal energy. Heat energy is used in many everyday activities such as cooking, heating buildings, and running industrial processes. Heat energy can also be used to generate electricity by using steam turbines and other methods. Heat energy can also be used to produce mechanical energy to drive machinery. Heat energy is essential for life on earth as it helps to keep organisms warm and sustain certain chemical reactions that are vital for survival.
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how can you represent the composition of an ionic compound?
The composition of an ionic compound can be represented by its chemical formula, which shows the types and numbers of atoms in a unit of the compound.
Representing the composition of ionic compoundsIonic compounds are composed of positively charged ions, called cations, and negatively charged ions, called anions.
The composition of an ionic compound can be represented by its chemical formula, which shows the types and numbers of ions in a unit of the compound.
The sum of the charges on the cations and anions must be equal and opposite in order for the compound to be electrically neutral.
For example, the chemical formula for magnesium chloride, an ionic compound, is MgCl2, which shows that it is made up of one magnesium ion (Mg2+) and two chloride ions (Cl-).
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Looking at the picture, how is it possible to determine the direction of blood flow from blood spatter?
It is possible to determine the direction of blood flow from blood spatter B. By looking at the shape of the drip and tail to see the possible direction.
How to determine the direction of blood flow?The shape of blood spatter can provide information about the direction and speed of blood flow, as well as the angle of impact, the type of weapon or force that caused the bloodshed, and other details about the crime scene.
One way to determine the direction of blood flow from a blood spatter pattern is to examine the shape of the spatter. Blood drops that are elongated or have a tail shape may indicate the direction of travel of the blood, since they tend to be stretched in the direction of motion.
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why do some ionic compounds contain a roman numeral?