Elements on the Periodic Table are identified by name and also by a chemical symbol. Which of the following chemical symbols is NOT written correctly?
A) Be
B) CA
C) O
D) CI
Answers
Answer: D
Explanation:
This is wrong according to the Periodic Table here's a image! Hope this helped! :D
Related Questions
How do heat waves form
Answers
Answer:
Heat waves can form when a high-pressure system moves into a region and stalls. The system can force warm air downward, acting like a cap as it keeps the cool air near the surface from rising, according to AccuWeather. What qualifies as a heat wave can vary greatly from region to region.
1. Although ethanol is used recreationally in moderation, it is a poison that
becomes lethal when you consume 5 to 8 g of the compound per kg of body
mass, a fact that is not emphasized enough on college campuses, where students
have tragically died from accidental alcohol overdoses. If a 120. 0 lb student
drank an entire 1. 00 L bottle of whiskey (80 proof; 40% ethanol by volume),
how would their consumption compare to the median lethal dose (7. 0 g/kg)?
(1 lb = 453. 59 g; ethanol density = 0. 789 g/cm³) You must use dimensional
analysis
Answers
After ingesting 1 L of 80-proof whiskey, the student's consumption of ethanol would, after the application of dimensional analysis, be 5.798 g of ethanol per kilogram of the body.
First, we calculate the mass of ethanol ingested by the student by using dimensional analysis. To do that, we must calculate its volume, which we can do using the total volume (1 L = 1000 mL) and alcohol volume percentage (40% = 0.40). When we have the volume in hand, we can calculate the mass of ethanol using its density (0.789 g/cm³ = 0.789 g/mL).
m(EtOH) = V(EtOH) * d(EtOH) = 0.40 * V(total) * d(EtOH) = 0.40 * 1000 mL * 0.789 g/mL = 315.6 g
So the student would ingest 315.6 g of ethanol. We can now divide that mass by the student's mass to calculate their consumption.
1 lb = 453.59 g = 0.45359 kg
315.6 g / (120.0 * 0.45359 kg) = 5.798 g/kg
This is dangerously close to the median lethal dose and definitely above the lower threshold of 5 g/kg, so the student would definitely be in danger of overdosing.
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An object travels at 65 mph west for 2 hours then changes direction and travels 50 mph east for three hours. Did this object accelerate?
Answers
No because it's travelling at a constant velocity in both scenarios and there's no particular direction in which the rate of change of velocity is changing.
What is the importance of subscripts when writing a chemical equation? (3 points)
Answers
The subscripts in a chemical equation shows the number of atoms of each element in a compound.
What is a chemical equation?A chemical equation is a symbolic representation of a chemical reaction where reactants are represented on the left, and products on the right.
Chemical equations involves molecular formulas of compounds that make up the reactant and products. The molecular formula is a notation indicating the number of atoms of each element present in a compound.
Subscript is a type of lettering form written lower than the things around it. The subscript shows the number of atoms of an element in a compound.
Examples of elements with evident subscripts are as follows:
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A material with density 2.7 grams/mL occupies 35.6 mL. How many grams the material are there?
Answers
A material with density 2.7 g/ml and volume 35.6 ml would have a mass of 96.12 g
Given that,
Density (D) = 2.7 g/ml
Volume (V) = 35.6 ml
We need to find the mass (m) of the material
We know that,
D = m / V
D = Density
m = Mass
V = Volume
Substituting,
2.7 = m / 35.6
m = 2.7 * 35.6
m = 96.12 g
Thus, mass of the material is 96.12 g
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What happens in the process of beta decay?
Answers
Answer:
a neutron decays into a proton, an electron, and an antineutrino: n Æ p + e - +.
Explanation:
In beta plus decay, a proton decays into a neutron, a positron, and a neutrino: p Æ n + e+ +n. Both reactions occur because in different regions of the Chart of the Nuclides, one or the other will move the product closer to the region of stability. These particular reactions take place because conservation laws are obeyed. Electric charge conservation requires that if an electrically neutral neutron becomes a positively charged proton, an electrically negative particle (in this case, an electron) must also be produced. Similarly, conservation of lepton number requires that if a neutron (lepton number = 0) decays into a proton (lepton number = 0) and an electron (lepton number = 1), a particle with a lepton number of -1 (in this case an antineutrino) must also be produced. The leptons emitted in beta decay did not exist in the nucleus before the decay–they are created at the instant of the decay.
Why are sodium (Na) and potassium (K) in the same group on the periodic table?
A They are both hard and brittle.
B They have similar reactivity.
C They are both colorless.
D They have similar atomic weights.
Answers
Sodium (Na) and potassium (K) in the same group on the periodic table because of option B They have similar reactivity.
The periodic table, also called the periodic table of the factors, is a tabular show of the chemical elements. it is broadly used in chemistry, physics, and other sciences, and is typically visible as an icon of chemistry.
Lithium, sodium, and potassium have the same wide variety of valence electrons i.e. 1, for this reason, they belong to the same organization. The institution is referred to as the alkali metals group because these kinds of elements shape oxides that dissolve in water to form alkali.
Potassium is observed clearly in lots of meals and as a complement. Its major position within the body is to assist maintain ordinary levels of fluid inside our cells. Sodium, its counterpart, keeps regular fluid ranges outdoors of cells. Potassium also helps muscles to settle and supports normal blood pressure.
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What evidence might you need in order to explain the bands of different colors
Answers
Evidence might you need in order to explain the bands of different colors are because of electromagnetic radiations
The color of the light that correspond to the narrow wavelength band are the pure spectral colors
Here each different wavelength and frequency of visible light correspond to the different color so that spectrum appear as a band of color ranging from violet at the shorter wavelength and full spectrum of visible light travel through prism and wavelength separates into the colors of the rainbows because each colors has its own frequency and different wavelength and spectrophotometer is the important tool to study the colors of band
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3. Explain why it was significant that large numbers of other frogs and toads became extinct at the same time the golden toads disappeared.
Answers
This opens an opportunity for scientists to observe the region where the frogs/toads lived or the time period when they lived, to determine what phenomena is causing them to go extinct.
Perhaps an invasive species drove the creatures to extinction, or the competition for resources became too great, causing them to suffer.
Weather changes could have hindered them, like a drought or forest fire.
They also could have contracted a virus, but these are things that would have to be influenced by other factors and would have to be studied by scientists.
These are just possible explanations for why the frogs and toads might have gone extinct when the golden toads disappeared
Andrea's teacher wrote a note on her lab report stating that though her data was precise, it was not accurate. What could Andrea have done wrong?
Group of answer choices
Written the data down in her notebook incorrectly
Not properly calibrated her instruments
She didn't do anything wrong; experiments do not always turn out the way we expect.
She could have made several random errors.
Answers
If Andrea's teacher wrote a note on her lab report stating that though her data was precise, it was not accurate, then Andrea she didn't properly calibrate her instruments (Option b).
What are precision and accuracy?The term precision indicated that the measurement was correctly recorded in the experimental procedure, while accuracy refers to this measurement is factually correct. For example, when measuring temperature, it may be deviated from the correct temperature value due to failure of calibration in instrumentation.
Therefore, we can conclude that precision and accuracy are not identical and we can take precise measurements that are not accurate.
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show the linkages between a trisaccharide with the sequence glca–glca–glca. the trisaccharide has an α1→4 glycosidic linkage between the first and second \glca monosaccharides. the trisaccharide has a β1→4 glycosidic linkage between the second and third glca monosaccharides. show stereochemistry using wedge (upward) or dash (downward) bonds.
Answers
Trisaccharides, an oligosaccharide, are created when three monosaccharides are linked together by two glycosidic connections.
What are trisaccharide?Trisaccharides, an oligosaccharide, are created when three monosaccharides are linked together by two glycosidic connections. The constituent monosaccharides can form each glycosidic bond between any hydroxyl group, just like the disaccharides can.
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a solution is prepared by mixing 0.14 moles of acetic acid (ch3cooh) with 0.25 moles of sodium acetate (nach3coo) in 1.00 liters of solution. ka for acetic acid is 1.8 x 10-5. what will be the ph of the solution once equilibrium is established?
Answers
The pH established of the equilibrum is 7.
What is equilibrium?
equilibruim is a state in which opposing forces of influence are balanced.
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1. s orbital(s) and p orbital(s) form sp3 orbital(s).target 1 of 9target 2 of 9target 3 of 9 2. s orbital(s) and p orbital(s) form sp2 orbital(s).target 4 of 9target 5 of 9target 6 of 9 3. s orbital(s) and p orbital(s) form sp orbital(s).
Answers
A sphere surrounds the atomic nucleus called the s orbital. There are shells within the sphere where an electron is more likely to be discovered right now. 1s is the smallest sphere. Greater than the 1s orbital are the 2s and 3s orbitals.
Each p orbital has two lobes, that are located on either side of the plane of the nucleus. The three p orbitals are equal in terms of size, shape, and energy, but they differ in how the lobes are orientated. These three orbitals are referred to as 2px, 2py, and 2pz because the lobes are located along one of the x, y, or z-axis. Similar to s orbitals, p orbitals grow in size and energy as the primary quantum number rises (4p > 3p > 2p).
sp3 orbital: One of a group of hybrid orbitals that result from mathematically combining one s orbital and three p orbitals to create four new equivalent orbitals that are directed toward the corners of a regular tetrahedron.
One of the hybrid orbitals created when one s orbital and one p orbital are mathematically merged to create two new equivalent, perpendicular orbitals is the sp orbital. With the exception of being closer to the nucleus, sp orbitals resemble p orbitals in appearance.
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How to assure our bottled water is free of Calcium,
Magnesium and Lead ions.
Answers
Answer:
t can be removed by using a water softener
Explanation:
A car was purchased in 2010 for $20,000. The car is depreciating by 15% each year. How much would the car be worth in 2020? What value do you use for T
Answers
The value of a car that was purchased in 2010 for $20,000 which is depreciating in value by 15% each year is $3937.49.
What will be the value of the car after 10 years if it depreciates by 15% every year?The value of the car will be found using the exponential decay model.
The formula of the exponential decay model is given as follows:
y = a (1 - r)ˣ
where;
y = the amount remaining
a = initial amount
r = decay rate
x = time period of decay
In the question above, a car was bought for $20000 in 2010.
The value of the car decays exponentially at a rate of 15% each year.
The time period between 2010 and 2020 is 10 years.
Considering the data given about the car:
a = $20000
r = 15% or 0.15
x = 10
Substituting the values in the decay formula:
y = 20000 (1 - 0.15)¹⁰
y = 20000 (0.85)¹⁰
y = $3937.49
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in your experiment, you found a height difference () of 155.2 mm of hg at 22 oc. at that temperature, the vapor pressure of water is 19.8 mm hg. if the barometric pressure in the lab was 789 mm hg, what is the pressure of h2 in the buret (in mm hg)? note: do not include the units in your answer.
Answers
However, if it is heated to impregnated vapor, volume and work (1W2) will determine the final temperature. result (a) Indicate that the lift pressure should be 400 kPa, using v = V/ m = 0.1 m3/kg
Standard sets of circumstances for experimental measures to be produced at standard temperatures and pressures (STP) enable comparisons to be made between various sets of data. The most commonly used standards are those of the National Institute of Standards and Technology (NIST) and the International Union of Pure and Applied Chemistry (IUPAC), albeit these standards are not generally acknowledged. Different essential delineations for other associations' standard reference circumstances have been established.
In chemistry, IUPAC changed its description of standard temperature and pressure in 1982
Temperature and Pressure
Until 1982, STP was defined as a temperature of273.15 K( 0 °C, 32 °F) and an absolute pressure of exactly 1 atm(101.325 kPa).
Since 1982, STP has been defined as a temperature of273.15 K( 0 °C, 32 °F) and an absolute pressure of exactly 105 Pa( 100 kPa, 1 bar).
STP shouldn't be confused with the standard state generally used in thermodynamic evaluations of the Gibbs energy of a response.
NIST uses a temperature of 20 °C(293.15 K, 68 °F) and an absolute pressure of 1 atm(14.696 psi,101.325 kPa). This standard is also called normal temperature and pressure( shortened as NTP). still, a common temperature and pressure in use by NIST for thermodynamic trials is298.15 K( 25 °C, 77 °F) and 1 bar(14.5038 psi, 100 kPa). NIST also uses" 15 °C( 60 °F)" for the temperature compensation of refined petroleum products, despite noting that these two values aren't exactly harmonious with each other.
The International Standard Metric Conditions for natural gas and analogous fluids are288.15 K(15.00 °C;59.0.
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Name the following three structures.
Answers
The Iupac Name of given three compounds are 3,4,5-trimethylheptane, 2,2,3,3-tetramethylpentane and 2,2- dimethyl-3-ethylpentane.
For (1),
The longest straight chain have 7 carbon compound and having single bond, suffix of this compound is Heptane. Now there are three functional group of methyl there for prefix is trimethyl. Overall the name of compound is 3,4,5-trimethylheptane.
The longest straight chain have 5 carbon compound and having single bond, suffix of this compound is pentane. Now there are four functional group of methyl there for prefix is tetramethyl. Overall the name of compound is 2,2,3,3-tetramethylpentane.
The longest straight chain have 5 carbon compound and having single bond, suffix of this compound is pentane. Now there are three functional group of methyl and ethyl so they write according to alphabetic order. Overall the name of compound is 2,2- dimethyl-3-ethylpentane.
Thus, we concluded that the The Iupac Name of given three compounds are 3,4,5-trimethylheptane, 2,2,3,3-tetramethylpentane and 2,2- dimethyl-3-ethylpentane.
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According to the Law of Conservation of Matter, what happens to atoms during a chemical reaction?
1. More atoms are produced to form new substances.
2. Nothing; they stay the same.
3. The atoms are rearranged to form new substances.
4. Atoms are converted into energy during the chemical reaction.
Answers
Answer: 3. The atoms are rearranged to form new substances.
According to law of conservation of matter, atoms are rearranged to form new substances in a chemical reaction.
What is law of conservation of matter?According to law of conservation of matter, it is evident that matter can be neither created nor destroyed rather it is restored at the end of a chemical reaction .
Law of conservation of matter and energy are related as matter possesses mass and mass and energy are directly proportional which is indicated by the equation E=mc².Concept of conservation of matter is widely used in field of chemistry and fluid dynamics.
Law needs to be modified in accordance with laws of quantum mechanics under the principle of matter and energy equivalence.This law was proposed by Antoine Lavoisier in the year 1789.
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What must a force be greater than in order to move an object?
Responses
inertia
inertia
momentum
momentum
acceleration
acceleration
gravity
Answers
Answer:
Acceleration
Explanation:
What mass in grams of ammonia can be made from 340 g of H₂?
Answers
The balanced equation for ammonia formation is:
N2 + 3H2 ---> 2NH3
First we need to figure out how many moles of hydrogen, 340 grams nets us. We can do this by dividing 340 by the molar mass of diatomic hydrogen (2.016 grams/mole). This will get us 168.651 moles.
From the chemical formula, we see that it takes 3 moles of hydrogen to produce 2 moles of ammonia. So, if we multiply the moles of hydrogen by (2/3), we can find the moles of ammonia produced.
168.651 x (2/3) = 112.43 moles of ammonia
To convert this into grams, we multiply this number with the molar mass of ammonia (which is 17.031 grams/mole)
112.43 x 17.031 = 1914.8 grams of ammonia. Or if you want to account for significant figures, 1900 grams of ammonia.
if cleaning does not throughly remove the surface water from your plastic sample, where in the energy ranges of the ir spectrum might you see a broad peak, indicating the presence of water?
Answers
The presence of water on the surface of the plastic sample will be indicated with a broad peak in the 2400 – 3200 [tex]cm^{-1}[/tex] range of Infra-red (IR) spectroscopy.
The term "infra-red (IR) spectroscopy" refers to a method for locating the functional groups that are present in a molecule. The electromagnetic spectrum's infrared area is located between the microwave and the visible spectrum. The typical Infra-red (IR) absorption range is 600-4000 [tex]cm^{-1}[/tex]. The IR spectra of substances that absorb in the IR range exhibits peaks. A molecule that is IR active is water. In the Infra-red region, it absorbs. Water is thus not used as a solvent in IR spectroscopy. Therefore, it is necessary that water existing on the surface of the samples be removed during cleaning before their IR is recorded. However, if cleaning does not get rid of the water that is on the surface, an expansive peak in the IR spectra will show up between 2500 and 3200 [tex]cm^{-1}[/tex].
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You need to use your separatory funnel for an extraction, but you notice that there is some residual water in it from when it was washed during the previous lab period. What should you do?.
Answers
Depending on the extraction you are performing and the way it was washed, the separatory funnel can either be dried, washed again, or just used as is.
In an ideal case, the separatory funnel was thoroughly washed and rinsed with deionized water. Because most liquid-liquid extractions include an aqueous layer, the small amount of water already present in the funnel will not have any negative impact on the results of your experiment, and the funnel can be used as it is.
If you are not sure whether the funnel was properly washed, you can quickly wash it yourself using detergent and water, rinse it thoroughly with deionized water, and then use it.
Finally, you can rinse the funnel with some ethanol (or, if possible, acetone), which will pick up water and wash away any organic impurities that might be present, and then dry it with a hair dryer. Be careful to wait for the funnel to cool after drying because many organic solvents have low boiling points and might cause a problem if poured into a hot funnel.
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a mixture of argon and xenon gases is maintained in a 7.66 l flask at a pressure of 2.44 atm and a temperature of 86 °c. if the gas mixture contains 17.0 grams of argon, the number of grams of xenon in the mixture is
Answers
By using the general gas equation, the mass of Xenon in the mixture is found to be 27.44g.
The ideal gas law, also known as the general gas equation, says that the product of the pressure and volume of one gram of an ideal gas is equal to the result of the universal gas constant and the absolute temperature of the gas.
PV = nRT denotes the general gas equation. In this equation, the letters P, V, n, R, T stand for the pressure of the ideal gas, the volume of the ideal gas, the total amount of the ideal gas given in moles, the universal gas constant and the temperature, respectively.
The general gas equation states that one mole of an ideal gas may occupy a volume of 22.414 liters under standard circumstances, which are a pressure of 101,325 Pa / 1atm and a temperature of 273.15 K or 0°C.
Given:
Pressure, P = 2.44atm
Temperature, T = 86+273 = 359K
Volume, V = 7.66L
To find:
Mass of Xe = ?
Formula:
PV = nRT
Calculations:
Let total no. of moles of Ar and Xe = y
n = PV/RT
n = 2.44 x 7.66 / (0.0821 x 359) = 0.634mol
No. of moles of Argon (yAr) = 17/40 = 0.425mol
y = yAr + yXe
0.634 = 0.425 + yXe
yXe = 0.634 - 0.425
yXe = 0.209mol
Mass of Xe = no. of moles x gram atomic mass
Mass of Xe = 0.209 x 131.293 = 27.44g
Result:
27.44g Xenon is present in the given Argon and Xenon mixture.
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N a p h, f a d h, and h 2 o enter the electron transport chain. o 2 and 32 a t p exit the electron transport chain. which change will correct this model of the electron transport chain? switch naph and 32 atp. switch fadh and 32 atp. switch h2o and o2. switch naph and o2.
Answers
The change will correctly effect the model of the electron transport system above simply is to switch H₂O and O₂ ( Water and oxygen ).
The correct answer choice is option c.
Switching water and oxygen molecules to effect a change where NAPH, FADH, and H₂O enter the electron transport chain.It happens that oxygen react with 2 different electrons from the transport chain and 2 hydrogen in order to produce water molecules in the process.
Electron transport chain simply refers to a protein complex redox reactions which result in the production of ATP molecules. In this whole process of forming ATP, the electrons in the chain carried by the NADH, FADH2 and H+· are transferred to oxygen atom.
In conclusion, for an effective change to occur in the above electron transport system, there needs to be a switch of water and oxygen molecules
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Answer :Switch H2O and O2.
Explanation: edgenuie 2022-23
what is a solid with the following characteristic property:
a density of 0.56g/cm³
Answers
Solid with the following characteristics property: Density is 0.56 g/cm³ is Lithium .
Lithium , chemical symbol Li is the alkali group metal. lithium is the lightest solid element. lithium has melting point of 180.54 °C and having boiling point of 1342 °C. lithium belongs to group I(a) having valency 1. under normal condition , lithium is the least dense solid element having density 0.56 g/cm³ . lithium has several industrial uses like heat resistant glass lithium ion batteries , lithium is so light ,it can float on water.
Thus, Solid with the following characteristics property: Density is 0.56 g/cm³ is Lithium .
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Full Tablet................................
Answers
The reaction rate with mass of the tablet being 1000 mg and volume of water 0.200 L is
(i) If Reaction time is 34.5 sec – 145 mg / L / sec is the reaction rate
(ii) If Reaction time is 28.9 sec – 173 mg / L / sec is the reaction rate
(iii) If Reaction time is 23.1 sec – 216 mg / L / sec is the reaction rate
Given that, Mass of tablet = 1000 mg
Volume of water = 0.200 L
We need to find the reaction rate
We know that, Reaction rate = [tex]\frac{mass of tablet / volume of water}{reaction time}[/tex]
(i) Reaction rate if reaction time is 34.5 sec = [tex]\frac{1000 / 0.200}{34.5}[/tex] = 145 mg / L / sec
(ii) Reaction rate if reaction time is 28.9 sec = [tex]\frac{1000/0.200}{28.9}[/tex] = 173 mg / L / sec
(iii) Reaction rate if reaction time is 23.1 sec = [tex]\frac{1000/0.200}{23.1}[/tex] = 216 mg / L / sec
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Which of the following statements are correct?
Magnesium chloride and magnesium sulfate are ionic compounds.
Methane and carbon dioxide are ionic compounds
An ion that gains an electron has a positive charge.
Ionic compounds have higher melting and boiling points than covalent compounds.
Answers
(1) Magnesium chloride and Magnesium Sulfate are Ionic compounds.
(4)Ionic compounds have higher melting and boiling points than covalent compounds
Explanation for each point :
(1) MgCl and MgSO4 are iconic compounds because they exist as solids due to strong electrostatic forces of attraction and are soluble in polar solvents.
The bond formed here is electrovalent(or ionic bond).
(2) Methane and Carbon dioxide are NOT ionic compounds .
•They are Covalent compounds
•In methane , CH4 , carbon is attached to four hydrogen atoms as Central atom C has 8 valence electrons.
•In carbon dioxide , CO2 it is a polar covalent bond and central atom C gas 8 valence electrons.
(3)An ion that gains an electron has a NEGATIVE charge not positive charge.
When an electron loses an electron it will have a positive charge , this process is known as Ionization.
(4) Ionic compounds have higher melting and boiling points than covalent compounds because the bonds in ionic compounds have high forces of electrostatic and hence also requires high energy to break .
———————
What are Ionic Compounds(Ionic bond)?
•If the two oppositely charged ions have strong electrostatic forces of attraction then a Ionic bond is formed.
•This formation is a redox process.
•These are good electrical conductors in molten state.
What are Covalent bonds/compounds?
•If the bond is formed between two atoms by mutual sharing of the outer most electrons then it’s known as covalent bond.
•Polar covalent bond are formed when two dissimilar electro negative atoms have mutual sharing of electron pairs.
•These have low melting and low boiling points
•These are not electrical conductors as they don’t have free electrons in them.
for the gas phase decomposition of ethyl chloroformate, the rate constant has been determined at several temperatures. when in is plotted against the reciprocal of the kelvin temperature, the resulting linear plot has a slope of k and a -intercept of 24.6. the activation energy for the gas phase decomposition of ethyl chloroformate is kj/mol. submit answer
Answers
The reaction rate constant and activation energy are connected through the Arrhenius equation. By using the logarithmic form of that equation, we can calculate the activation energy of 0.2045 kJ/mol.
According to Arrhenius equation, activation energy and rate constant are connected in the following way:
[tex]k = Ae^{\frac{-E_{a} }{RT} }[/tex]
Ea is the activation energy, k is the rate constant, R is the universal gas constant (8.314 J/Kmol) and T is absolute temperature (in Kelvins). This expression can be transformed so that it is easier to determine Ea:
[tex]lnk = \frac{-Ea}{R}*\frac{1}{T}[/tex]
When lnk is plotted as a function of 1/T, the slope coefficient is equal to -Ea/R. This means that:
-24.6 K = -Ea/R ⇒ Ea = 24.6 K * R = 24.6 K * 8.314 J/Kmol = 204.5 J/mol = 0.2045 kJ/mol
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There are more white blood cells than red blood cells in the blood.
True or false
Answers
Answer:
it's false the correct answer will be There are more red blood cells than white blood cells in the blood
What is the measurement of the letter I when using appropriate prefix units?
Answers
A metric prefix is a unit prefix used to denote a multiple or submultiple of a basic unit of measure. Today's metric prefixes are all decadic. Each prefix has its own distinctive sign, which is added before any unit symbol.
Since humans have been measuring things for thousands of years, the units we use to represent those measurements have changed. Numerous units are now available to describe physical amounts.
Longitude, for instance, can be expressed in terms of the foot, metre, fathom, chain, parsec, league, and so on.
In the SI, multiples and subdivisions of any unit can be designated by combining the prefixes deka, hecto, and kilo, which represent 10, 100, and 1000 respectively, and deci, centi, and milli, which represent correspondingly, with the name of the unit.
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