how many significant figures are in 120 miles?
Answers
1 and 2 are the significant zeros.
pls mark brainliest
Related Questions
Is the atomic mass of copper is 64?
Answers
No, the atomic mass of copper is not 64. The atomic mass of copper is approximately 63.546 atomic mass units (amu).
Copper has an atomic mass of around 63.546 atomic mass units (amu). The mass of all naturally occurring copper isotopes, weighted to account for their respective abundances, is represented by this value.
Copper-63, which accounts for around 69% of naturally occurring copper, is the most prevalent isotope of the metal. Copper-65 makes up the remaining 31%. Copper-63 has an atomic mass of around 62.93 amu, while copper-65 has an atomic mass of roughly 64.93 amu. The resultant atomic mass is roughly 63.546 amu when these two isotopes are averaged together, taking into consideration their relative abundances. Chemically speaking, copper is an element with the symbol Cu and the atomic number 29. It has a very high thermal conductivity and electrical conductivity and is a soft, malleable, and ductile metal.
For such more questions on copper :
brainly.com/question/2289251
#SPJ4
what is photosynthesis ?
Answers
Answer:
the process by which green plants and some other organisms use sunlight to synthesize foods from carbon dioxide and water. Photosynthesis in plants generally involves the green pigment chlorophyll and generates oxygen as a byproduct.
Explanation:
basically when plants make food for themselves
Answer:
photosynthesis, the process by which green plants and certain other organisms transform light energy into chemical energy. During photosynthesis in green plants, light energy is captured and used to convert water, carbon dioxide, and minerals into oxygen and energy-rich organic compounds.Explanation:
hii are you also from India ¯\_(ツ)_/¯1,3-Dihydroxy-2-propanone, more commonly known as dihydroxyacetone, is the active ingredient in artificial tanning agents such as Man-Tan and Magic Tan.
(a) Write a structural formula for this compound.
(b) Would you expect it to be soluble or insoluble in water?
(c) Write a structural formula for the product formed by its reduction with NaBH4.
Answers
a) The structural formula for dihydroxyacetone (1,3-Dihydroxy-2-propanone) is:
H O
| |
H - C - C - O - H
| |
H H
(b) Dihydroxyacetone is soluble in water. It has two hydroxyl groups (OH) which can form hydrogen bonds with water molecules, allowing it to dissolve and mix with water.
(c) When dihydroxyacetone is reduced with NaBH4 (sodium borohydride), it undergoes a reduction reaction and forms 1,3-propanediol. The structural formula for 1,3-propanediol is:
H O
| |
H - C - C - C - O - H
| |
H H
The hydrogen bonds allow dihydroxyacetone to mix and dissolve in water.
The reduction reaction with NaBH4 involves the conversion of the carbonyl group (C=O) in dihydroxyacetone to a hydroxyl group (OH), resulting in the formation of 1,3-propanediol.
Sodium borohydride acts as a reducing agent by providing hydride ions (H-) to reduce the carbonyl group.
The structural formula for the product demonstrates the replacement of the carbonyl group with a hydroxyl group, leading to the formation of 1,3-propanediol.
Learn more about structural formula at: https://brainly.com/question/30114649
#SPJ11
When a 8 gram slice of bread is burned under a beaker of 4500 grams of water, it heats up the water by 1.3 degrees Celsius. The specific heat of water is 1 cal/g degree C. How many calories does this slice of bread contain
Answers
Answer:
\(5850\ \text{cal}\)
Explanation:
m = Mass of water = 4500 g
c = Specific heat of water = \(1\ \text{cal/g}^{\circ}\text{C}\)
\(\Delta T\) = Change in temperature of water = \(1.3^{\circ}\text{C}\)
Heat is given by
\(q=mc\Delta T\\\Rightarrow q=4500\times 1\times 1.3\\\Rightarrow q=5850\ \text{cal}\)
A slice of the bread contains \(5850\ \text{cal}\).
I NEED HELP QUICK Activity:
Part 1: Write all bold vocabulary and define the words (See attached PDF File below). Make sure to number each.
Part 2: Look at the "Second Read of Investigating Landforms On Venus" worksheet (Slide 14) and highlight text to the questions on the worksheet.
Part 3: Answer the questions on the "Second Read of Investigating Landforms On Venus" worksheet: 1) How were the novae on Venus similar to the landforms in Geyra's computer model? AND 2) How did the results of Gerya's model provide evidence for what formed the novae on Venus? (Slide 16)
Part 4: Write the notes: (Slide 19)
3) Scientists can use models to test their ideas and get evidence about processes in the natural world that are difficult to observe.
Exit Slip: How do models help scientists answer questions?
Answers
2) A half-cell containing Br and Br- is connected to a half-cell containing Mg+2 and Mg to form a voltaic cell. Determine the proper direction for each half cell reaction to assure a spontaneous, complete cell reaction. Find the value of the complete cell electrode potential (E°).
Answers
A half cell is one of the two electrodes in a galvanic cell or simple battery.
Find the value of the complete cell electrode potential (E°)?
Look up the standard reduction potentials for Br and Mg. I find the following:
Mg2+ + 2e- ==> Mg(s) Eº = -2.38 V
Br2(l) + 2e- ==> 2Br-(aq) Eº = 1.07 V
Accordingly, Br2 will be reduced and Mg(s) will be oxidized in order to have a positive potential.
Br2 + 2e- ==> 2Br-
Mg ==> Mg2+ + 2e-
------------------------------------
Br2 + Mg ==> Mg2+ + 2Br- Eº = 1.07 + 2.38 = 3.45 V
To learn more about half cell refers to:
https://brainly.com/question/24002834
#SPJ1
Group the labels according to the type of rock they describe.
Answers
Igneous: Basalt ,Granite ,Obsidian ,Pumice, Andesite
Sedimentary: Limestone ,Sandstone, hale ,Conglomerate ,Gypsum
Metamorphic: Marble ,Slate, Schist, Gneiss ,Quartzite
Describe rock.Rock is a naturally occurring mineral aggregate that is cohesive and composed of one or more minerals.
These aggregates often take the shape of recognisable and mappable volumes and are the fundamental building block of the solid Earth.
According to the processes that led to the development of a rock, it is typical to classify rocks into three major categories.
There are three main types of rocks: igneous rocks, which are made of molten rock known as magma; sedimentary rocks,
which are made up of rock fragments or materials that have precipitated from solutions; and metamorphic rocks,
which are formed from either igneous or sedimentary rocks and have undergone conditions that have changed their mineralogical composition, texture, and internal structure.
Igneous: Basalt ,Granite ,Obsidian ,Pumice, Andesite
Sedimentary: Limestone ,Sandstone,hale ,Conglomerate ,Gypsum
Metamorphic: Marble ,Slate,Schist, Gneiss ,Quartzite
To know more about rock visit:
https://brainly.com/question/19930528
#SPJ9
assuming question - Group the labels according to the type of rock they describe. Igneous, sedimentary, and metamorphic.
iodine-125 has a half-life of about 60 days. how many milligrams of a 500 mg sample will remain after 300 days? responses 0.6 mg 0.6 mg 7.8125 mg 7.8125 mg 15.625 mg 15.625 mg 31.25 mg 31.25 mg
Answers
The initial amount of iodine-125 in a 500mg sample is not provided. Therefore, the only way to find the mass remaining after 300 days is to make use of the half-life and the concept of exponential decay.
The general formula for the amount remaining after time t is given by:
A(t) = A₀(1/2)^(t/h)
where A₀ is the initial amount, t is the time elapsed, h is the half-life, and A(t) is the amount remaining after time t.
In this case, we have h = 60 days and t = 300 days.
Substituting these values into the formula above, we get:
A(300) = A₀(1/2)^(300/60)A(300) = A₀(1/2)^5A(300) = A₀(1/32)
Therefore, the mass remaining after 300 days is 1/32 times the initial mass.
If we let x be the initial mass, then the mass remaining is (1/32) x
The problem states that the answer should be given in milligrams, so we must convert the mass remaining to milligrams. If the initial mass is x milligrams, then the mass remaining is:(1/32) x milligrams.
The answer is 15.625 mg.
To know more about iodine-125 visit:
brainly.com/question/18596804
#SPJ11
Which spatial orientation will involve more than one bond angle value?Select the correct answer below:lineartrigonal planartrigonal bipyramidaloctahedral
Answers
The spatial orientation that involves more than one bond angle value is trigonal bipyramidal. This is because the trigonal bipyramidal geometry has five bonding positions, consisting of three equatorial positions and two axial positions.
The bond angles in the equatorial positions are 120°, while the bond angles in the axial positions are 90°. Therefore, in the trigonal bipyramidal geometry, there are two different bond angle values: 120° and 90°.
This orientation is commonly seen in molecules such as PF5, which has a trigonal bipyramidal geometry with the five fluorine atoms bonded to the central phosphorus atom.
Understanding the bond angles in different geometries is essential in predicting the reactivity and properties of molecules in chemistry.
To know more about spatial orientation refer here:
https://brainly.com/question/30417652#
#SPJ11
at a certain temperature and pressure, chlorine molecules have an averages speed of .0380 m/s what is the average speed of so2 molecules under the same conditions?
Answers
The average speed of SO2 molecules at a certain temperature and pressure will be the same as the average speed of chlorine molecules, which is: 0.0380 m/s
At a certain temperature and pressure, chlorine molecules have an average speed of .0380 m/s. Under the same conditions, the average speed of SO2 molecules will be the same. This is because temperature and pressure are constant parameters and do not change the speed of molecules. Therefore, the average speed of SO2 molecules at the same temperature and pressure is .0380 m/s.
To further explain, the temperature is related to the kinetic energy of molecules and the average speed of a molecule is proportional to the square root of its absolute temperature. Therefore, when the temperature is constant, the average speed of the molecules is constant too.
Similarly, pressure is related to the number of collisions between molecules, but it does not have an effect on the average speed of the molecules. Therefore, when the temperature and pressure are constant, the average speed of the molecules is also constant.
In conclusion, the average speed of SO2 molecules at a certain temperature and pressure will be the same as the average speed of chlorine molecules, which is .0380 m/s.
To know more about temperature refer here:
https://brainly.com/question/11464844#
#SPJ11
The _______ biome is the largest on Earth.
Answers
Explanation:
taiga the largest land well forest
How many grams are in 23 moles of Fe
Answers
There are 23 atoms of Fe in a 55.845 gram. As a result, after dividing our mass of 239 grams by the iron formula mass of 55.84 grams per bole, formol equals after calculation.
How do I translate grams to moles?Use the millimeters to mole formula to calculate the molecular weight n, of a substance with a given mass, m, (in grams) accurately. n = m / M, where M is the substance's molar mass also known as gram-molecular weight. a substance's molecular weight expressed as a mass in grams. Example: NaCl salt weighs 58.44 grams per gram-mole. American Meteorological Society, copyright 2022.
What is moles and how is it made?Number of Avogadro = 6.023 × 10²³. The products of every chemical reaction are measured using the Avogadro number. 1 mole of atoms, molecules, or particles is equal to 6.023 x 1023. Calculating the number of molecules is as follows: mole number = quantity of material / mass of one mole.
To know more about mass visit :
https://brainly.com/question/26789700
#SPJ4
There are 23 atoms of Fe in a 55.845 gram. As a result, after dividing our mass of 239 grams by the iron formula mass of 55.84 grams per bole, formol equals after calculation.
How do I translate grams to moles?Use the millimeters to mole formula to calculate the molecular weight n, of a substance with a given mass, m, (in grams) accurately. n = m / M, where M is the substance's molar mass also known as gram-molecular weight. a substance's molecular weight expressed as a mass in grams. Example: NaCl salt weighs 58.44 grams per gram-mole. American Meteorological Society, copyright 2022.
What is moles and how is it made?Number of Avogadro = 6.023 × 10²³. The products of every chemical reaction are measured using the Avogadro number. 1 mole of atoms, molecules, or particles is equal to 6.023 x 1023. Calculating the number of molecules is as follows: mole number = quantity of material / mass of one mole.
To know more about mass visit :
brainly.com/question/26789700
#SPJ1
At high temperatures, xenon gas will combine directly with fluorine gas to produce solid xenon tetrafluoride. what is the unbalanced chemical equation for this process.
Answers
At high temperatures, xenon gas will combine directly with fluorine gas to produce solid xenon tetrafluoride (XeF4). The chemical reaction can be represented using an unbalanced chemical equation as follows: Xe(g) + F2(g) → XeF4(s).
In the given equation, Xe(g) is the chemical symbol for xenon gas, F2(g) is the chemical symbol for fluorine gas, and XeF4(s) is the chemical formula for solid xenon tetrafluoride. The reaction is a synthesis reaction, as two reactants combine to form a single product.The unbalanced chemical equation above needs to be balanced to satisfy the law of conservation of mass. The law of conservation of mass states that the mass of the reactants must be equal to the mass of the products in a chemical reaction.To balance the chemical equation, we need to ensure that the number of atoms of each element is the same on both sides of the equation. We can balance the equation as follows:Xe(g) + 2F2(g) → XeF4(s)In the balanced equation, there are 1 xenon atom, 4 fluorine atoms, and 1 solid xenon tetrafluoride molecule on both sides of the equation. Thus, the equation is balanced.The balanced equation shows that 1 mole of xenon reacts with 2 moles of fluorine gas to produce 1 mole of solid xenon tetrafluoride. The reaction is highly exothermic and produces a lot of heat.
For more questions on temperatures
https://brainly.com/question/4735135
#SPJ8
Consider a process in which a solid decomposes at room temperature to form a solid and a gas. A beaker containing this solid will feel warm to the touch as the reaction occurs.
For this process at room temperature, ΔG is _________, ΔS is _______, and ΔH is _______.
Answers
A process in which a solid decomposes at room temperature to form a solid and a gas. A beaker containing this solid will feel warm to the touch as the reaction occurs.
For this process at room temperature, ΔG is negative, ΔS is positive, and ΔH is negative.
Gibbs equation helps us to predict the spontaneity of reaction on the basis of enthalpy and entropy values directly. When the reaction is exothermic, enthalpy of the system is negative making Gibbs free energy negative. Hence, we can say that all exothermic reactions are spontaneous.
Since, in this process the beaker gets heated which means the reaction is exothermic and ΔH is negative and therefore, ΔG is negative, ΔS is positive, thus the reaction will be spontaneous.
Learn more about Gibbs Equation, here:
https://brainly.com/question/29432538
#SPJ1
does changes in state of matter indicate a chemical change.
Answers
Answer:
No, changes in matter are physical changes.
Explanation:
Select the reason why the adsorbent in a chromatography column should never be allowed to dry.a)Mobile phase molecules will permanently adhere to the surface of the adsorbent.b)The adsorbent will oxidize more readily when in direct contact with air.c)Cracks form due to air pockets in the adsorbent and this will negatively impact the separation.d)The adsorbent particles will fuse together and not allow mobile phase to pass through.
Answers
The reason why the adsorbent in a chromatography column should never be allowed to dry is that cracks may form due to air pockets in the adsorbent, negatively impacting the separation process.
When the adsorbent dries out, the particles may also fuse together, making it impossible for the mobile phase to pass through, resulting in a loss of separation efficiency. Additionally, if the adsorbent oxidizes more readily when in direct contact with air, this could affect the separation quality. Finally, mobile phase molecules may permanently adhere to the surface of the adsorbent if it dries out, further affecting the separation. Therefore, it is essential to keep the adsorbent in a chromatography column wet to avoid any potential issues.
The reason why the adsorbent in a chromatography column should never be allowed to dry is that cracks form due to air pockets in the adsorbent, and this will negatively impact the separation. When the adsorbent dries out, air pockets can form within the column, leading to an uneven surface for the mobile phase to interact with the adsorbent. This uneven surface can cause poor separation of the sample components and reduce the overall efficiency of the chromatography process. Therefore, it is crucial to maintain the proper moisture level in the adsorbent to ensure optimal separation and accurate results.
To know more about chromatography, visit:
https://brainly.com/question/30907934
#SPJ11
what is relative abundance isotopes
Answers
The relative abundance of isotopes is the number of atoms of a particular isotope divide by the total number of atoms of all isotopes of that element, multiplied 100 percent.
What is relative abundance isotopes?The relative abundance of an isotope is the percentage of atoms with a specific atomic mass found in a naturally occurring sample of an element.
Also relative abundances refers to the relative proportions of the stable isotopes of each element. They are most often quoted as atom percentages
To calculate the percent abundance of each isotope in a sample of an element, the number of atoms of a particular isotope is usually divide by the total number of atoms of all isotopes of that element and then multiply the result by 100 since it is expressed in percentage.
Mathematically, the formula for relative abundance is given as;
R.A = ( number of atoms of isotope / total number of atoms ) x 100%
Learn more about relative abundance here: https://brainly.com/question/6844925
#SPJ1
5. Calculate the mass in grams of 1.88 x 1024 particles of CO2?
Answers
Answer:
137.44g CO2
Explanation:
(1.88 × 10²⁴ / 6.02 × 10²³) × (16 + 16 + 12.01) = 137.44g
Select ALL of the following statements that are incorrect.
Solids, liquids, and gases are all able to act as solutes in a solution.
Solids, liquids, and gases are all able to act as solvents in a solution.
Solids are not able to act as a solvent if a gas is the solute.
Gases are not able to act as a solvent if a solid is the solute.
Answers
Answer:the 4th one is incorrect,and the 1st one is incorrect hope this helps.
Adsorption is defined as a process in which gas molecules tend to adsorb on the surface of a solid solvent.
Therefore, the statement solids are not able to act as a solvent if a gas is the solute, is false.
On the other hand, gases can also act as a solvent if a solid is the solute.
Explanation:
Adsorption is defined as a process in which gas molecules tend to adsorb on the surface of a solid solvent.
Therefore, the statement solids are not able to act as a solvent if a gas is the solute, is false.
On the other hand, gases can also act as a solvent if a solid is the solute.For example, air present in the surrounding acts as a solvent and solid substances present in the surrounding acts as a solute.
Hence, the statement gases are not able to act as a solvent if a solid is the solute, is false.
Thus, we can conclude that following are the statements which are incorrect.
Solids are not able to act as a solvent if a gas is the solute.
Gases are not able to act as a solvent if a solid is the solute.
what is chemical formula of water ? how it is composed
Answers
Answer:
H2O
Explanation:
it is composed of 2 atoms of Hidro and 1 atom Oxy
Answer:
The chemical formula for water is H2O..it is composed by the bonding of 2 molecules of hydrogen and one molecule of oxygen,a covalent bond to be specific.
I hope this helps
How does genetic variation make a community more stable? Include explanations of how genetic variation is related to the struggle to survive, differential reproductive success, heredity, natural selection, and evolution
Answers
Answer:
If you have genetic variation then a community is more likely to survive because the population is more likely to have individuals who are fine if there are environmental changes. Then natural selection will happen and the species will evolve to he adapted to the new environment. If everyone in a population has the same genetics, than one thing could take them all out.
How many moles of Mercury ll oxide are needed to produce 125g of o2
Answers
what atomic or hybrid orbitals make up the sigma bond between and in acetylene, ? ( is the second carbon in the structure as written.) orbital on orbital on what is the approximate bond angle? angle
Answers
The sigma bond in acetylene \((C_2H_2)\) is formed by the overlap of the 1s orbitals of the two carbon atoms and the 2s orbital of the two hydrogen atoms.
To form the sigma bond, the 1s orbital of each carbon atom must overlap with the 2s orbital of the adjacent hydrogen atom. The sigma bond is the strongest type of covalent bond and has the lowest bond dissociation energy.
The approximate bond angle in acetylene is 109.5 degrees. This bond angle is determined by the geometry of the molecule and the arrangement of the atoms in space. The bond angle in acetylene is slightly distorted from a perfect tetrahedral shape due to the electron density distribution in the molecule.
Learn more about sigma bond visit: brainly.com/question/31377841
#SPJ4
Sound Wave, Ripple in water, Guitar String, TV Signal, Which one does not belong? Why?
Answers
Answer:
The TV signal.
Explanation: Hope this is right! :)
Name the following aromatic hydrocarbon:
CH3CH₂
A. 2,6-diethylbenzene
C. 1,4-dihexylbenzene
CH₂CH3
B. 1,4-diethylbenzene
D. 1,4-dimethylbenzene
Answers
3-Methylpentane is the IUPAC name for the substance.
whether in a continuous chain or a ring, the longest chain of carbons joined by a single bond serves as the basis for IUPAC nomenclature. According to a precise set of priorities, all deviations—whether they involve numerous bonds or atoms other than carbon and hydrogen—are denoted by prefixes or suffixes.
+3-Methylpentane is the IUPAC name for the substance in question. It has a lengthy chain of 5 carbon atoms, which gives it the prefix pent-, and a single bond is what gives it the postfix -ane (alkane). Given that the methyl group is present at the third carbon, it is 3-methylpentane.
Learn more about IUPAC Nomenclature here-
https://brainly.com/question/14379357
#SPJ9
what is hybridization? answer unselected the mathematical combination of standard atomic orbitals to form hybrid atomic orbitals where the number of standard atomic orbitals equals the number of hybrid atomic orbitals unselected the mathematical combination of hybrid atomic orbitals to form standard atomic orbitals where there is a single atomic orbital that forms several hybrid atomic orbitals unselected the mathematical combination of standard atomic orbitals to form hybrid atomic orbitals where all of the standard atomic orbitals form a single hybrid atomic orbital unselected the mathematical combination of standard atomic orbitals to form hybrid atomic orbitals where one standard atomic orbital forms multiple hybrid atomic orbitals
Answers
Hybridization is the process of combining standard atomic orbitals to form hybrid atomic orbitals. This process occurs when an atom in a molecule is bonded to other atoms and needs to form new hybrid orbitals to accommodate the bonding. Hybridization helps to explain the geometry of molecules and the types of chemical bonds that are present.
During hybridization, the standard atomic orbitals are mathematically combined to form hybrid atomic orbitals. The number of standard atomic orbitals equals the number of hybrid atomic orbitals. The resulting hybrid orbitals have different shapes and orientations compared to the original atomic orbitals. Hybridization can occur in different ways depending on the number and types of orbitals involved. For example, in sp hybridization, one s orbital and one p orbital combine to form two hybrid sp orbitals. These hybrid orbitals have a linear shape and are oriented at an angle of 180 degrees from each other. This type of hybridization occurs in molecules such as acetylene (C2H2) where the carbon atoms are bonded to each other with a triple bond.
In sp2 hybridization, one s orbital and two p orbitals combine to form three hybrid sp2 orbitals. These hybrid orbitals have a trigonal planar shape and are oriented at an angle of 120 degrees from each other. This type of hybridization occurs in molecules such as ethene (C2H4) where the carbon atoms are bonded to each other with a double bond. In sp3 hybridization, one s orbital and three p orbitals combine to form four hybrid sp3 orbitals. These hybrid orbitals have a tetrahedral shape and are oriented at an angle of 109.5 degrees from each other. This type of hybridization occurs in molecules such as methane (CH4) where the carbon atom is bonded to four hydrogen atoms.
To know more about Atomic Orbitals visit:
https://brainly.com/question/29561958
#SPJ11
The molecular weight of table salt, NaCl, is 58. 5 g/mol. A tablespoon of salt weighs 6. 37 grams.
Calculate the number of moles of salt in one tablespoon.
First, complete the unit conversion using dimensional analysis:
Answers
=6.37g/58.5g/mol=0.109moles
:number of moles of salt in one tablespoon is 0.109moles
Answer:
Answer in picture
Explanation:
Explanation I need to show work pls help me
Answers
Answer
D. Acid rain reacting with limestone bedrock.
Explanation:
- Brief Description:
A chemical reaction occurs when acidic rainfall falls on limestone or chalk. During the process, new, soluble compounds are produced. These disintegrate in the sea and are washed away, weathering the rock. Some forms of rock are resistant to chemical weathering. When rain falls from the sky onto a limestone (CaCO3) statue, a reaction between sulphuric acid and calcium carbonate happens. Calcium sulfate is formed as a result of this process (CaSO4). Because calcium sulfate is soluble in water, the statue will ultimately disintegrate. Limestone is chemically worn through the carbonation process. Rainwater collects carbon dioxide as it travels through the atmosphere, forming a weak carbonic acid. Water and carbon dioxide react to generate a mild carbonic acid. The fractures in the limestone are acted upon by this mild carbonic acid. Many weak acids, such as carbonic acid, are found in water. When carbon dioxide gas from the atmosphere combines with rainfall, a weak but copious acid is created. Other forms of acid rain are produced by sulfur dioxide and nitrogen gases, which function as chemical weathering agents.- Chemical WeatheringChemical weathering is generally the most active and effective weathering process. Water within soil or stone dissolves minerals of soil, softens minerals that absorpb the water, and dissolves carbondioxide.Chemical weathering is the breakdown of rock by chemical processes. Water, air, and chemicals released by organisms cause chemical weathering of rocks when they dissolve the minerals in a rock.- Carbon Dioxide-Bicarbonate-Carbonate Equilibrium
The carbon dioxide/bicarbonate/carbonate buffer is an essential buffer in surface waters. When water is in equilibrium with both CO2 from the atmosphere and carbonate-containing rock, its pH is buffered to 8.3, which is close to the pKa of the weak acid bicarbonate HCO3- (pKa = 8.4).- Acid Rain The production of nitric and sulfuric acids in our atmosphere causes acid rain. These chemicals are strong acids that are very soluble in water and dissolve in cloud water droplets.The majority of nitrogen and sulfur oxides are caused by human activity. Electric utilities (60 percent), industrial combustion (17 percent), and industrial processes are the principal sources of sulfur dioxide emissions (8 percent ). Transportation, with internal combustion engines, accounted for more than half of all NOx emissions, with additional emissions from electric utilities (26 percent) and industrial combustion accounting for the remainder (14 percent ). Agricultural operations, particularly manure management, are the biggest source of ammonia emissions, but industry and transportation also emit some ammonia. Acid rain leads to the acidity of lakes and streams, as well as the degradation of trees at high elevations and vulnerable forest soils.- Effect of LimestoneCalcium carbonate, often known as [Ca][CO3], is a common mineral. One well-known form of calcium carbonate is limestone. Acids in acid rain increase calcium carbonate breakdown by interacting with the carbonate anion.This results in a bicarbonate solution. Because surface waters are in balance with atmospheric carbon dioxide, the concentration of carbonic acid, H2CO3, in the water remains constant.Because the minerals react with the excess acid, the presence of limestone and other calcium carbonate rock in lakes and streams helps to maintain a steady pH. However, acid rain can finally overwhelm the surface water's buffering ability.
10m/s for 30 seconds
Answers
Answer:
300 meters for 30 seconds
Explanation:
10*30= 300 therefore giving you your answer.
Vote brainliest!
what is the importance of polar covalent and hydrogen bonds in the structure of water?
Answers
Answer:
Water is a remarkable substance, and its unique properties are largely due to the presence of polar covalent bonds and hydrogen bonds in its structure. These characteristics play a crucial role in the physical and chemical properties of water, making it essential for life as we know it.
Explanation:
The polar covalent bonds in water arise from the unequal sharing of electrons between oxygen and hydrogen atoms. This results in the oxygen atom having a partial negative charge (δ-) and the hydrogen atoms having partial positive charges (δ+). These charges create polarity within the water molecule, leading to the formation of hydrogen bonds.
Hydrogen bonds occur when the partially positive hydrogen atom of one water molecule is attracted to the partially negative oxygen atom of another water molecule. These hydrogen bonds are relatively weak individually, but when present in large numbers, they contribute to the cohesion, surface tension, and high boiling point of water.
The importance of these bonds is manifold. The cohesion between water molecules due to hydrogen bonding enables water to form droplets, have a high surface tension, and flow freely, facilitating transport within organisms and in the environment. Additionally, hydrogen bonding leads to the high specific heat capacity and heat of vaporization of water, making it an effective regulator of temperature in living organisms and ensuring stable environmental conditions.
Furthermore, hydrogen bonds play a crucial role in the unique properties of water as a solvent. The polar nature of water allows it to dissolve a wide range of substances, including ionic compounds and polar molecules, facilitating various biological processes such as nutrient transport and chemical reactions in cells.