The arid and semi-arid regions located poleward of the equator on an idealized supercontinent represent the trade wind feature.
The constant east-to-west predominant winds that blow in the equatorial region of the Earth are known as the trade winds or easterlies. The trade winds are strongest during the winter and when the Arctic oscillation is in its warm phase, and they primarily originate from the northeast in the Northern Hemisphere and the southeast in the Southern Hemisphere.
For generations, sailing ship captains have exploited the trade winds to navigate the world's waters. As it descends, the temperature rises while the moisture content stays constant, lowering the relative humidity of the air mass, making subsident (sinking) air comparatively dry. This hot, dry air is referred to as trade wind.
Usually found above a marine tropical (warm and wet) air mass, this warm, dry air is often referred to as a superior air mass. A temperature inversion is a rise in temperature with height. A trade wind inversion is what it is called when it happens during a trade wind regime.
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If you put a scale in an elevator and weigh yourself as you go up and then go back down, does the scale give you the same number for both up and down? Explain your answer.
Yes, despite of how high or low you are, gravity exerts a force on you that can be measured.
Briefing:The weight appears to grow as the individual moves upward because the weight scale's usual force on them increases. When the elevator descends, the opposite is true.
What is a weighing scale?Weight is determined by the force applied to the load cell of weighing scales and balances. They then translate the outcome into mass and present it in several mass units.
What use does a weighing scale function?An instrument used to calculate an object's weight or mass is a weighing balance. It is a necessary equipment in laboratories, commercial kitchens, and pharmacies and is offered in a variety of sizes with various weighing capacities.
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A shiny piece of metal has a volume of 315 cm and a mass of 851 g. what is the density of the metal?
0 the following electron configurations represent excited states. identify the element and write its ground-state condensed electron configuration.
The ground state is the lowest energy state of the atom.
What is the ground state configuration?We know that the electron configuration has to do with the manner in which electrons are arranged in an atom. The ground state is the lowest energy state of the atom. The atom could move to higher energy states by absorbing energy sometimes in the form of heat or light.
The ground state has to do with the lowest energy state of the atom and according to the Bohr theory, the atom could acquire energy and move from this lowest energy state to higher energy states. The higher energy states are short lived and the electron returns to the ground state.
We want to show the ground state of each of the atoms as shown in the question;
N - [tex]1s^{2} 2s^{2} 2p^{3}[/tex]
S - [tex]1s^{2} 2s^{2} 2p^{6} 3s^{2} 3p^{6} 4s^{2} 3d^{10} 4p^{4}[/tex]
Rh - [tex]1s^{2} 2s^{2} 2p^{6}3s^{2} 3p^{6} 4s^{2} 3d^{10} 4p^{6} 5s^{1} 4d^{8}[/tex]
Thus, these are the ground state electron configurations of the nitrogen, sulfur, and rhenium atoms shown above respectively.
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Do the number of protons in an atom of an element always equals its atomic weight
Answer:
It is approximately equal to the number of protons and neutrons, with a little extra added by the electrons.
Explanation:
Which transformation could take place at the cathode of a voltaic cell?
a. haso2
b. cr2 to cr2o72-
c. h2o to o2
d. f- to f2
e. none of the other answers could take place at the cathode.
The transformation could take place at the cathode of a voltaic cell is (d) F- to F2.
What is a voltaic cell?
Electrons can move from one reaction to the other thanks to a wire that connects the two processes. We have therefore produced a voltaic/galvanic cell. A voltaic cell, often called a galvanic cell, is an electrochemical device that produces electricity through uninhibited redox processes. It is divided into two distinct half-cells.
A polarised electrical device's cathode is the electrode from which a regular current exits. The abbreviation CCD, which stands for Cathode Current Departs, might be used to remember this definition. Positive charges move in the direction described by a conventional current.
The transformation could take place at the cathode of a voltaic cell is (d) F- to F2.
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air at 40c and 2 atm is passed through a shallow bed of napthalene spheres 12 mm in diameter at a rate of 2 m/s based on the empty cross section onto the bed
Airat 100ºF and 2 atm is passed through a shallow bed ofnaphthalene spheres ½ in. in diameter at rate of 5 ft/s, based onthe empty cross sectionof the bed.
What is of naphthalene?The simplest polycyclic aromatic hydrocarbon, naphthalene is an organic chemical with the formula It is a white crystalline solid with a distinctive odor that may be detected at concentrations as low as 0.08 ppm by mass. The structure of naphthalene is a fused pair of benzene rings, making it an aromatic hydrocarbon. The primary component of conventional mothballs is what makes it most well-known.
Two distinct accounts from the early 1820s mentioned a white solid produced by the distillation of coal tar that had a strong odor. In 1821, John Kidd cited these two disclosures and went on to discuss many of the qualities and methods of manufacturing of this drug. He suggested calling it naphthaline.
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Which element has similar properties to neon (Ne)? HELP ME PLS!
Explanation:
Krypton because it's inert gas
what will be the effect on the amount of gas produced if the experiment is repeated using 0.35 g of k(s) instead of 0.35 g of li(s) ?
The effect on the amount of gas produced is that if the experiment is repeated using 0.35 grams of potassium is that less amount of hydrogen gas is liberated.
What is relation between amount of gas and metal used ?When potassium reacts with water it liberates hydrogen gas and potassium hydroxide is formed.
[tex]2K+3H_2O\rightarrow2H_2+2KOH[/tex]
When lithium reacts with water it liberates hydrogen gas and lithium hydroxide is formed.
[tex]2Li+3H_2O\rightarrow2H_2+2LiOH[/tex]
Moles in case of each reaction can be calculated by the formula ,
n=W/M
where W =mass and M=molar mass
therefore, moles of potassium are ,0.35 g/39=0.0089
and moles of lithium are,0.35 g/6.9=0.0507
Since the amount of moles produced when lithium metal is used is more as compared to potassium ,lithium will produce more gas.Thus,on replacing lithium with potassium less gas will be produced.
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Which pair of atoms have similar properties?
a. mg and br
b. li and be
c. cl and br
d. f and he
e. li and f
Cl and Br have similar properties as they belong to halogen family.
What is halogen family?Halogen, any of the six nonmetallic elements that constitute Group 17 (Group VII A) of the periodic table. The halogen elements are fluorine (F), chlorine (Cl), bromine (Br), iodine (I), astatine (At), and (Ts). They were given the name halogen, from the Greek roots Hal- (“salt”) and -gen (“to produce”), because they all produce sodium salts of similar properties, of which sodium chloride—table salt, or halite—is best known.
Because of their great reactivity, the free halogen elements are not found in nature. In combined form, fluorine is the most abundant of the halogens in Earth’s crust. The percentages of the halogens in the igneous rocks of Earth’s crust are 0.06 fluorine, 0.031 chlorine, 0.00016 bromine, and 0.00003 iodine. At and Ts do not occur in nature, because they consist of only short-lived radioactive isotopes.
Chlorine is the best known of the halogen elements. The free element is widely used as a water-purification agent, and it is employed in a number of chemical processes. In the past ethylene dibromide was extensively used as an additive in.
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the relationships among which variable quantities are expressed by the ideal gas law equation?(1 point)
The relationships among the variable quantities pressure 'P', volume 'V', number of moles 'n', and absolute temperature 'T' expressed by the ideal gas law equation.
The ideal gas law -
Ideal gas - It is a speculative or hypothetical gas with independent behavior of attractive forces and repulsive forces. It can be described by the ideal gas law completely. This is not possible in real life. But it might be possible under high pressure and high temperature.
The ideal gas law is an equation which expresses the relationship among variable quantities namely pressure, volume, number of moles and absolute temperature. It can also be called a general gas equation.
The ideal gas equation is :
PV = nRT
where,
P = pressure,
V = volume,
n = number of moles / amount of substance
R = Ideal gas constant (It is a constant with definite value and not a
variable)
T = absolute temperature
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calculate the quantity of heat released in kj when 15.7 g of benzene in the liquid phase at 50.0 °c is converted to solid benzene at 2.0 °c. molar mass of benzene
The quantity of heat released in kJ when 15.7 g of benzene in the liquid phase at 50.0 °C is converted to solid benzene at 2.0 °C is 3.32 kJ.
What is the quantity of heat released?The quantity of heat released is calculated using the formula below:
The quantity of heat released = (heat evolved from 50 °C to 5.4 °C) + (latent heat of fusion) + (heat evolved on cooling from 5.4 °C to 2.0 °C)The following values apply to benzene:
Melting point = 5.4 °CBoiling point = 90.1 °CHeat of fusion = 9.9 kJ/molHeat of vaporization = 30.7 kJ/molSpecific heat (solid) = 1.51 J/g-"CSpecific heat (liquid) = 1.80 J/g "CSpecific heat (gas) = 1.92 J/g-°CMolar mass = 78.11 g/molMoles of benzene = 15.7/78/11 = 0.20 moles
Heat evolved from 50 °C to 5.4 °C = 15.7 * 1.8 * (50 - 5.4) = 1260.4 J = 1.26 kJ
Latent heat of fusion = 0.2 * 9.9 = 1.98 kJ
Heat evolved on cooling from 5.4 °C to 2.0 °C = 15.7 * 1.51 * (5.4 - 2.0) = 80.6 J = 0.08 kJ
quantity of heat released = 1.26 + 1.98 + 0.08 = 3.32 kJ
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what is the purpose of the aqueous sodium bisulfite solution that is added during the workup of the bromination reaction? group of answer choices to destroy the unreacted acetic acid to dry the organic phase during the workup procedure to generate a better electrophile to destroy the unreacted bromine
To destroy the unreacted Bromine :
Bromination of aniline is taken out in by reacting aniline with bromine and acetic acid. This reaction gives us in a tri-substituted product known as 2,4,6 tribromoaniline which is basically a white precipitate.
During Bromination reaction, Sodium Bisulfite may be added if there is any unreacted bromine left in the reaction combination. This is compulsory because lively Bromine can barge into the reaction because of bromine's oxidizing characterstics.
Sodium Bisulfite Solution is a reducing agent and it can change into unreacted bromine and bromate by force it into the bromide.
Moreover, Sodium bisulfite can also help in show the final color of the solution because of the bromine presence.
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Milk shake
Air in bottle
Concrete
Helium gas are the following what?
The following as an element, a compound, a homogeneous mixture, or a heterogeneous mixture:
(a) a milkshake: heterogeneous mixture
(b) air in a bottle: homogeneous mixture
(c) concrete: heterogeneous mixture
(d) helium gas: element
What is a homogenous mixture?Whether a mixture is solid, liquid, or gaseous, homogeneous mixtures have the same ratios of their component constituents throughout a particular sample. Its composition stays the same throughout. There is just one observable phase of substance in a homogeneous mixture.
Is milk a homogeneous mixture?Due to the dispersion of fat particles throughout the milk and the fact that sugars are dissolved in the water portion, milk is used as an example of both a homogeneous mixture and a heterogeneous mixture.
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The complete question is -
Classify each of the following as an element, a compound, a
homogeneous mixture, or a heterogeneous mixture:
(a) helium gas:
(b) a milkshake:
(c) air in a bottle:
(d) concrete:
how much water must be evaporated from 500 grams of a 10% salt solution to obtain a 15% salt solution?
The amount of water that must be evaporate from 500 grams of a 10% salt solution to obtain a 15% salt solution is: 166.67 g
To solve this problem, the formula and the procedure that we have to use is:
c1 * m1 = c2 * m2
Where:
c1= concentration of the concentrated solutionm1 = mass of the concentrated solutionc2 = concentration of the diluted solutionm2 = mass of the diluted solutionInformation about the problem:
c1 = 10%m1=500 gc2 = 15%m2= m1 - xAmount of water evaporate = xApplying the dissolution of concentrations formula, we get:
c1 * m1 = c2 * m2
10% * 500g = 15% * (500 g - x)
0.10 * 500g = 0.15*(500g - x)
50 g = 75g - 0.15x
Isolating the (x) variable, we have:
0.15x = 75g - 50 g
0.15x = 25g
x = 25g / 0.15
x = 166.67 g
What is a solution?In chemistry a solution is known as a homogeneous mixture of two or more components called:
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What is a non-proton
Answer:
any particle that isn't a proton
Explanation:
If 6.3 g of butanoic acid, c4h8o2, is dissolved in enough water to make 1.0 l of solution, what is the resulting ph? look up the
You need the Ka value of butanoic to do this (Ka = 1.51 x 10^-5).
5.9/88 = mol butanoic acid = 0.067…mol
so [C4H8O2] = 0.067… mol/L ([ ] conc in mol/L)
Ka = [H+][C4H7O2-] /[[C4H8O2] ] assume
[H+] at eqm = [C4H7O2-] at eqm and [C4H8O2] at eqm is same as acid originally (fair assumption as it hardly dissociates)
then [H+] = sqroot of Ka[C4H8O2] and the pH is the -log of this.
gives an ans of 3.00 to 3sf
What is acid?
Atomicity, consistency, isolation, and durability (ACID) is an acronym and mnemonic for the four key characteristics that a transaction manager ensures for every transaction (which is also called a transaction monitor). These qualities include atomicity.
Therefore,
You need the Ka value of butanoic to do this (Ka = 1.51 x 10^-5).
5.9/88 = mol butanoic acid = 0.067…mol
so [C4H8O2] = 0.067… mol/L ([ ] conc in mol/L)
Ka = [H+][C4H7O2-] /[[C4H8O2] ] assume
[H+] at eqm = [C4H7O2-] at eqm and [C4H8O2] at eqm is same as acid originally (fair assumption as it hardly dissociates)
then [H+] = sqroot of Ka[C4H8O2] and the pH is the -log of this.
gives an ans of 3.00 to 3sf
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Answer:
You need the Ka value of butanoic to do this (Ka = 1.51 x 10^-5).
5.9/88 = mol butanoic acid = 0.067...mol
so [C4H8O2] = 0.067... mol/L ([] conc in mol/L)
Ka = [H+][C4H702-]/[[C4H8O2]] assume
[H+] at eqm = [C4H702-] at eqm and [C4H8O2] at
eqm is same as acid originally (fair assumption as it hardly dissociates)
then [H+] = sqroot of Ka[C4H8O2] and the pH is the -log of this.
gives an ans of 3.00 to 3sf
What is acid?
Atomicity, consistency, isolation, and durability (ACID) is an acronym and mnemonic for the four key characteristics that a transaction manager ensures for every transaction (which is also called a transaction monitor). These qualities include atomicity.
Therefore,
You need the Ka value of butanoic to do this (Ka =
1.51 x 10^-5).
5.9/88 = mol butanoic acid = 0.067...mol
so [C4H802]=0.067... mol/L ([] conc in mol/L)
Ka = [H+][C4H702-]/[[C4H8O2]] assume
[H+] at eqm = [C4H702-] at eqm and [C4H8O2] at eqm is same as acid originally (fair assumption as it
hardly dissociates)
then [H+] = sqroot of Ka[C4H8O2] and the pH is the
-log of this.
gives an ans of 3.00 to 3sf
From a bag containing 5 nickels, 8 dimes, and 7 quarters, 5 coins are drawn at random and all at once. what is the probability of getting 2 nickels, 2 dimes, and 1 quarter? how many total electrons
The probability of getting 2 nickels, 2 dimes, and 1 quarter is; 0.1264
What is probability ?The area of mathematics known as probability deals with numerical descriptions of how likely it is for an event to happen or for a claim to be true. The probability of an occurrence is a number between 0 and 1, with 1 representing certainty and 0 representing impossibility of the event.
The higher the probability of an event, the more probable it is to occur. Tossing a fair (unbiased) coin is a straightforward illustration. Since there are no other possible outcomes and the coin is fair, the probability of both "heads" and "tails" is half. Since there are no other conceivable outcomes, the probability of either "heads" or "tails" is equal to one.
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an individual takes in 2,000 ml of water during the day. ideally they should lose ml of water during the day.
An individual takes in 2,000 ml of water during the day. Ideally, they should lose 2,000 ml of water during the day.
What is Water?Water, with the chemical formula H₂O, is an inorganic, transparent, flavorless, odorless, and almost colorless liquid that makes up the majority of the Earth's hydrosphere as well as the fluids found in every known living thing.Despite not providing food, energy, or organic micronutrients, it is essential for all known forms of life. Its molecules are made up of two hydrogen atoms joined by covalent bonds and have the chemical formula H₂O.The liquid state of H₂O at standard pressure and temperature is referred to as "water" because the hydrogen atoms are joined to the oxygen atom at an angle of 104.45°.Water exists in a variety of natural conditions. It produces fog-like aerosols and precipitation in the form of rain.
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When ethanol is exposed to pbr3, followed by magnesium, then formaldehyde, and then aqueous acid, what is the resulting product?
When ethanol and pbr3 combine, bromoethane and phosphoric acid are created.
PBr3+3C2H5OH------>3C2H5Br+H3PO3
The chemical name for phosphorous tribromide is PBr3. It can be created by the interaction of red phosphorous with bromine and is a Lewis acid or electron deficient chemical that lacks a complete octet. This process is quite exothermic.
It is a colorless liquid mostly utilized for changing various alcohols into their corresponding alkyl bromides. The reaction is an inverted configuration bimolecular nucleophilic substitution reaction. Alkyl bromide is the main byproduct of this process.
Alcohol attacking phosphorous tribromide triggers this reaction's mechanism, which results in the substitution of an alcohol group for a bromine atom.
H H
| |
H -c-c-Br +Mg------> C2H5MgBr
| |
H H
CH3MgBr = (Grignard reagent compound )
We can add a single carbon atom to make a primary alcohol by reacting a Grignard reagent with formaldehyde.
_
CH3CH2MgBr+ H2C=O -------> CH3CH2CH2O ----->CH3CH2OH
AQUEOUS ACID: (taking HCL as not mentioned)
CH 3 CH 2 (OH) + HCl ------> CH 3 CH 2(Cl) + H 2 O
Reaction type: double replacement
resulting product: CH 3 CH 2 Cl
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calculate the equilibrium majority and minority carrier concentrations if the semiconductor is at room temperature.
Majority carrier concentration in a semiconductor is expressed as n0 = (ni)2/M, or Majority Carrier Electron Concentration = (Intrinsic Carrier Concentration)2/Minority Carrier Concentration.
What is equilibrium carrier concentration?
The equilibrium carrier concentration is the total number of carriers in the conduction and valence band. A constant is the result of minority and majority charge carriers. The equilibrium carrier concentration is defined as the total number of carriers in the conduction and valence bands without any external influence.
Majority carrier concentration in a semiconductor is expressed as n0 = (ni)2/M, or Majority Carrier Electron Concentration = (Intrinsic Carrier Concentration)2/Minority Carrier Concentration. It is defined as the equilibrium carrier concentration, which is equal to the intrinsic carrier concentration plus the number of free carriers added by doping the semiconductor.
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the manipulated variable in this experiment is the
a) type of antacid
b) amount of antacid used
c) time it takes for the reaction to occur
d) temperature at which the reaction occurs
The independent variable, also known as manipulated, is the one that changes and causes an effect on the depenedent variable. The manipulated variable is temperature. Option D.
What is the independent (manipulated) variable?Independent variables are those modified or changed by the researcher to study how this change affects another variable (the dependent one) and hence the results.
It also receives the name of the manipulated variable because the researcher alters its value or state to analyze its effect. These variables are voluntarily manipulated by the researcher.
In the exposed example,
Goal: To determine the effect of temperature on reaction rates.
Independent (manipulated) variable: Temperature
Dependent variable: time it takes the tablet to dissolve.
Temperature is what affects the time in which the tablet dissolves. The researcher changes temperature levels to analyze how much the time changes.
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Complete question,
A group of students conducts an experiment to determine the effect of temperature on reaction rates. They perform three separate trials in this experiment.
In the first trial, they drop an antacid tablet into a beaker of water at a temperature of 40 °C and record how long it takes the tablet to completely dissolve.
In the second and third trials, they use the same type and amount of antacid, but they change the temperature of the water to 25 °C for the second trial and 5 °C for the third trial.
The manipulated variable in this experiment is the
A. type of antacid used
B. amount of antacid used
C. time it takes for the reaction to occur
D. temperature at which the reaction occurs
Which of the following is a heterogeneous mixture?
a
sugar
b
sugar in water
c
samples of nitrogen and oxygen gases in the same container
d
samples of gaseous argon and solid iron in the same container
Answer: samples of gaseous argon and solid iron in the same container
According to catastrophists what was the rate of geological change?
According to catastrophists the rate of geological change is slow incremental changes
The catastrophic idea holds that severe, abrupt events with potentially global reach have formed the Earth in substantial part. Contrast this with uniformitarianism, sometimes known as gradualism, which postulates that all of the Earth's geological features were produced through slow, incremental processes like erosion. Uniformitarians believed that all geological processes, including erosion, were identical throughout history and that the present held the key to understanding the past. Since the initial disagreements, a broader and more comprehensive understanding of geologic events has emerged. The scientific community now acknowledges that there have been some catastrophic events in the past, but that these can be explained as extreme instances of natural processes that can take place.
What is geological change?
dynamic activities or events that take place on the surface of the Earth as a result of the impact of natural factors like wind, moving water, ice, and snow, temperature changes, freezing and thawing, chemical reactions, seismic shaking, and the application of gravity. When a force is greater than the earth's material can withstand, it deforms, moves, or undergoes chemical reactions.
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Which formulas both represent compounds?
O H₂ and O₂
O CO₂ and H₂O
O H ₂ and CO₂
O O2 and H₂O₂
Answer:
CO2 and H2O
Explanation:
CO2 and H2O are both compounds
lauren makes an art piece using the densities of various liquids to create layers of colors. she first determines the density of each liquid. then she pours them into a glass container and watches them separate into layers. liquid density dish soap 1.03 g/ml honey 1.36 g/ml corn syrup 1.33 g/ml corn oil 0.91 g/ml water 1.00 g/ml what information did she need to find the density of each liquid? how did she calculate density? which liquid sinks to the very bottom, and which floats at the very top?
Lauren needs the information like mass of each substance respect to its volume in order to estimate the density of each liquid that creates the layers of colors.
DescriptionLauren can calculate density by the formula
Density = Mass/ Volume
According to the densities, the liquid that has a density less than that of water, it will float in water.
Whereas the objects or liquids that have a density more than that of water, it will sink to the very bottom.
Density of liquidsA liquid’s density is a gauge of how heavy it is relative to the amount being measured. The liquid that weighs heavier is denser if you weigh two liquids with similar volumes or amounts.
A substance that is less dense than water will float if it is gently introduced to the water’s surface. Like a solid, a liquid’s density is determined by dividing its mass by its volume, or D = m/v. Water has an average density of one gram per cubic centimeter.
How dense is liquid, high or low?Liquids have particles that are closely spaced. Liquids have high densities because, although being randomly arranged, they are tightly packed.
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use melting point in a sentence in ur own words
the point in time when a solid transitions from a solid to a liquid at a fixed pressure, usually standard pressure. The temperature at which a substance transitions from a solid to a liquid state is known as its melting point (or, less frequently, liquefaction point). Pressure affects a substance's melting point, which is typically reported at a standard pressure such as 1 atmosphere or 100 kPa.
the temperature, at any given fixed pressure, at which a solid and its liquid are in equilibrium.
The temperature at which a substance melts when heated is known as its melting point.
the degree to which a solid becomes liquid. When compared to the freezing point,
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What is the name of N2CI4? Explain how you determined the bond type and the steps you used to determine the naming convention for the compound.
The name of N2CI4 is Dinitrogen tetrachloride.
I determined the bond type because there was no metal in the formula, and I determined the name by taking the prefixes of the subscripts and adding them to the elements. Since both nitrogen and chlorine want to gain electrons. we can obey the octet rule with a compromise of neither losing nor gaining electrons.
Two atoms share electrons to achieve the octet rule and form a covalent bond. Accordingly, the indicated compounds are covalent compounds. Explain what is most likely to happen when an atom of this element approaches an atom with seven valence electrons. Move to the outermost shell. Because both fluorine and hydrogen can only form ionic bonds.
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asap!!! due today!!! is it right??
Answer: yes it is right.
Explanation:
Answer: Correct
Explanation:
On its website, the epa claims that sulfur dioxide levels have fallen by 85etween 1990 and 2016. calculate the percent decrease between these two years to determine whether this claim accurate.
On its website, the epa claims that sulfur dioxide levels have fallen by 85 between 1990 and 2016.
What is SO2?
The national ambient air quality criteria for SO2 set by the EPA are intended to guard against exposure to all sulphur oxides (SOx). The most concerning component, SO2, serves as a marker for the larger group of gaseous sulphur oxides (SOx). At far lower quantities than SO2, the atmosphere contains other gaseous SOx (such SO3).
The largest source of SO2 in the atmosphere is the combustion of fossil fuels by power plants and other industrial facilities.
State and local governments will be able to comply with the EPA's national and regional rules to reduce emissions of SO2 and pollutants that create sulphur oxides (SOx) and assist them achieve the Agency's national air quality goals.
Now, So2 concentration in 1990 = 124 ppb
So2 concentration in 2016 = 16 ppb
Thus decrease in concentration of so2 is 108 ppb
Hence, decrease percentage = 87.09 % (ans)
Thus the claims are accurate.
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The standard metric unit of time is the Choose... Choose...
1.second
2.day
3.minute
4.hour
The standard metric unit of time is seconds.
What is the metric system of units?
The most common method for determining height, distance, and other daily objects is the metric system of measurement. Let's use a container of milk as an example. To determine the amount of milk, we use liters, and to determine the height of the jar, we use meters (or centimeters). This is due to the fact that these metric units, often known as SI units, are widely used around the world (International System of Units). Let's get started by finding out more about the metric system.
The basic metric unit of time is seconds.
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