Answer: D. A hurricane is a natural process, not the result of human activity.
Explanation: A hurricane is classified as a natural hazard because it is a natural phenomenon that occurs due to specific meteorological conditions, such as high ocean temperatures and specific wind patterns. It is not caused by human activity, unlike air pollution, acid rain, and ozone depletion, which are largely the result of human activities such as industrialization and deforestation. While hurricanes can vary in severity and destructiveness, and can cause significant damage across a wide area, it is ultimately the natural origin of the event that classifies it as a natural hazard.
The enthalpy changes of formation of gaseous ethene and gaseous ethane are 52 kJ mol-¹ and -85 kJ mol-¹ respectively
at 298 K What is the enthalpy change of reaction at 298 K for the
following process?
C₂H₂(g) + H₂(g) → C₂H6(g)
A-137 kJ mol-1
B -33 kJ mol-1
C +33 kJ mol-¹
D +137 kJ mol-¹
Gaseous ethane and ethene have formation enthalpies of 52 kJ mol-1 and -85 kJ mol-1 at 298 K, respectively. The process's endothermic reaction of reactions at 298 K is -137 kJ mol-1.
Why is ethene employed?Ethene is largely utilized as a monomer in the manufacture of plastics, to create other compounds, and as an industrial fuel gas worldwide. Ethene is used in Canada to mature bananas and some other tropical fruits after harvesting, as well as to level citrus.
How is ethene produced?Historically, hydrocarbons was used to produce ethylene, but natural gas is now being used more and more instead. Steam cracking, a procedure that decomposes petroleum through refining, is the main way to produce ethylene.
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the smallest representative unit of an ionic compound is called a ?
The lowest representational unit for an ionic compound is a formula unit.
What does a chemical representative unit mean?The smallest unit in which a substance naturally exists is called a representative particle. The atom is the representative particle for most elements. The atom is the representative particle for most elements. Iron, carbon, and helium are made up of individual iron, carbon, and helium atoms.
What are atoms smaller than?Subatomic is defined as "less than an atom." Protons, neutrons, and electrons make up atoms. Even smaller particles known as quarks are the building blocks of protons and neutrons. Physicists believe quarks are elementary particles based on the evidence that is currently available.
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Molecular solids are those solids whose composite units are molecules. Molecular solids are held together by the following kinds of intermolecular forces: , and bonding. Ionic solids are those solids whose composite units are ions. Ionic solids are held together by . Atomic solids are those solids whose composite units are . Atomic solids can themselves be divided into three following categories, where each is held together by a different kind of force. The first category, which includes only the noble gases in their solid form and is held together by relatively weak , is atomic solids. The second category, which is held together by bonds and includes such examples as copper or silver, is atomic solids. The last category, which is held together by and includes such examples as diamond, graphite, and silicon dioxide, is atomic solids.
Molecular solids are solids composed of molecules. Intermolecular forces like hydrogen bonds, dipole-dipole forces, and dispersion forces hold molecular solids together. Ionic solids are solids that contain ions as constituents. Ionic solids are held together by ion-dipole forces. Atomic solids are those whose entire structure is made up of atoms. Atomic solids are classified into three types, each of which is held together by a unique set of forces. Forces of dispersion The first category is atomic solids, which only consists of noble gases in their solid states and is held together by relatively weak coulombic forces. Metallic atomic solids fall into the second category, which is held together by nonbonding bonds and includes elements such as copper and silver. The final group of materials held together by covalent bonds is network covalent atomic solids, which include silicon dioxide, graphite, and diamond.
What are the five intermolecular forces?There are three types of intermolecular forces: hydrogen bonds, dipole-dipole interactions, and London dispersion forces (LDF). Regardless of whether molecules have any combination of these three types of intermolecular forces, all substances have LDF.
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Complete question in the image:
After intensive logging, most of the trees along a stream have been removed. Which of the following water quality changes would most likely occur downstream after logging?
answer choices
O Increased water temperature
O Increased dissolved oxygen
O Decreased total dissolved solids
O Decreased amount of fecal coliform
Increased water temperature is most likely occur downstream after logging.
When the tree roots are no longer holding the soil in place, soil erosion will increase. The stream's turbidity will rise as a result, and the temperature will rise as well.
Due to soil compaction and decreased transpiration, clear-cutting frequently lowers soil water-holding capacity and root strength. In addition, the loss of the forest cover leaves the soil surface vulnerable to intense precipitation and wide temperature changes.
When trees are destroyed through burning, cutting, or other means, they release carbon rather than absorbing it. 15% of all greenhouse gas emissions are attributable to deforestation and forest degradation.
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mercury and bromine are both liquid elements. they react with each other to form mercury (ii) bromide and no other products. what mass of mercury (ii) bromide will be produced from the reaction of 5.00 ml of mercury with 5.00 ml of bromine assuming an 82.2% yield? the density of mercury is 13.5 g/ml and the density of bromine is 3.2 g/ml.
120.96g mercury bromide will produce from the reaction of 5.00ml of mercury with 5.00ml of bromine.
Mass of mercury used in reaction.
Density = [tex]\frac{mass}{volume\\}[/tex]
13.5g/ml = [tex]\frac{x}{5.00ml}[/tex]
x = 67.5g
Mass of bromine used in reaction.
3.2 = [tex]\frac{x}{5.00ml}[/tex]
x = 16g
Balanced equation is Hg(l) + Br₂(l) ⇒ Hg Br₂(s)
moles of Hg used = [tex]\frac{67.6}{200.6}[/tex] = 0.336moles
moles of Br₂ used = [tex]\frac{16}{159.8}[/tex] = 0.100moles
Limiting reactant is Hg
moles of HBr₂ formed = 0.00.336 * 1 = 0.336moles
mass of HBr₂ = 0.336mol * 360g/mol = 120.96g.
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find the relative molecular mass of lead trioxonitrate(v)
(pb=108,N=14,O=16)
Answer:
The molecular mass of lead trioxonitrate(V) is 232
Explanation:
The molecular mass of Lead Trioxonitrate(V),which is Pb(NO3)2 is:
= 108 + (14 + 3*16)*2
= 108 + 62*2
= 108 + 124
= 232
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How do you find the mass and fractional abundance of an isotope?
Bromine has two naturally occurring isotopes (Br-79 and Br-81) and an atomic mass of 79.904 amu.
a. If the natural abundance of Br-79 is 50.69%, what is the natural abundance of Br-81?
b. If the mass of Br-81 is 80.9163 amu, what is the mass of Br-79?
For an isotope, fractional abundance is abundance that is expressed as a fraction.
Natural abundance is shown as a percentage, whereas fractional abundance is represented by a number between 0 and 1. The mass number of an isotope is the total number of protons and neutrons in its nucleus. Because each proton and neutron has a mass equal to one atomic mass unit, this is the case. By dividing the sum of the protons and neutrons by one amu, you may get the atom's mass.
a.If Br-79 has a natural abundance of 50.69%, then Br-81 will have the following abundance: (100 - 50.69)% = 49.31% is what fractional abundance of 0.4931 is equivalent to.
b. The mass of the isotope Br-79 is 78.91 u
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A solution at pH 6 contains _________ H+ than the same amount
of a solution at pH 8.
a. 20 times more
b. 100 times more
c. 2 times less
d. 100 times less
A solution at pH 6 contains 100 times more H⁺ than the same amount of a solution at pH 8.
What is pH?The amount of hydrogen ions in a solution depends on the pH of the substance.
Comparing the concentration of H⁺ ions in acidic solutions to water, they are typically higher. More than 1×10⁻⁷ M is their concentration. In comparison to water, basic solutions contain fewer H⁺ ions. Less than 1×10⁻⁷ M is the concentration of them. Acidity will be present in solutions with a pH between 1 and 6. The pH range between 8 and 10 defines a basic solution.
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A chemist breaks down a compound into 3.4 moles of carbon and 6.8 moles of oxygen. What is the percent composition by mass of each element in the compound?
The percent composition by mass of each element in the compound are 27% carbon, 73% oxygen.
What is the solution to percentage composition?Composition as a percentFind the compound's molar mass in grammes per mole for each element.Calculate the compound's overall molecular weight.Subtract the total molecular mass from the component's molar mass.The number you have now will be between 0 and 1. To obtain the composition in percent, multiply it by 100%.
The mass of an element in 1 mole of the compound is divided by the compound's molar mass, and the result is multiplied by 100 to determine the mass percent of the element in the compound.
3.4 moles of carbon / molar mass * 100 = 27% carbon
6.8 moles of oxygen / molar mass * 100 = 73%
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Please help me with this question
The first reaction is a single displacement reaction. The second one represents polymerization of ethene and the third one is a decomposition reaction.
What is displacement reaction ?In displacement reaction, one element or group is displaced by another element. The first reaction in the list is a single displacement reaction where, Cl is displaces one H from the reactant.
The second reaction is the polymerization of ethylene forming polythene. The third reaction is the decomposition of a higher hydrocarbon into its lower homologue.
Fourth reaction is the hydrogenation reaction converting an alkene to alkane. The last reaction is the elimination of water from ethanol called dehydration.
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using values from appendix c, calculate the value of δh∘ for each of the following reactions. 2CuO(s) + NO(g) --> Cu_20(s) + NO_2(g) Express your answer using three significant figures.
4NH_3 (g) + 0_2(g) --> 2N_2H4(g) + 2H_2O(l) Express your answer using five significant figures.
The value of δh∘ for each of the following reactions is given below.
2CuO(s) + NO(g) --> Cu_20(s) + NO_2(g):-383.5 kJ/mol
4NH_3 (g) + O_2(g) --> 2N_2H_4(g) + 2H_2O(l):-283.8 kJ/mol
δh∘ is the symbol for the total differential of the function h, which is a measure of the change in h when the inputs to the function are changed. It is used in calculus to study the behavior of functions.
For 2CuO(s) + NO(g) --> Cu_20(s) + NO_2(g):
ΔH° = ΣH°f (products) - ΣH°f (reactants)
ΔH° = [H°f (Cu20) + H°f (NO2)] - [H°f (CuO) + H°f (NO)]
ΔH° = (-247.1 kJ/mol) + (33.2 kJ/mol) - (-170.4 kJ/mol) - (90.2 kJ/mol)
ΔH° = -13.7 kJ/mol (3 sig figs)
For 4NH_3 (g) + O_2(g) --> 2N_2H_4(g) + 2H_2O(l):
ΔH° = ΣH°f (products) - ΣH°f (reactants)
ΔH° = [2H°f (N2H4) + 2H°f (H2O)] - [4H°f (NH3) + H°f (O2)]
ΔH° = (-87.9 kJ/mol) + (-241.8 kJ/mol) - (-45.9 kJ/mol) - (0 kJ/mol)
ΔH° =-283.8 kJ/mol (5 sig figs)
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Please help
Scuba tanks are often pressurized to about 3000 psi, or 44,100 atm at the start of the dive. What is this pressure in kPa?
Answer:
20678.57 KPa
Explanation:
1 atm = 14.7 psi = 101.325 KPa
Using ratio;
psi : KPa
14.7 : 101.325
3000 : X
X = (3000 x 101.325)/14.7
= 20678.57 KPa
Scuba tanks are often pressurized to about 3000 psi, or 44,100 atm at the start of the dive. Therefore, 20678.57 KPa is the pressure in kPa.
What is pressure?The physical force applied to an item is referred to as pressure. Per unit area, a perpendicular force is delivered towards the surface of the objects. F/A is the fundamental formula for pressure (Force per unit area). Pascals are a unit of pressure (Pa). Absolute, ambient, differential, and gauge pressures are different types of pressure.
"Pressure" is defined as the thrust (force) applied to a surface per area. The force to area ratio is another way to describe it (over which the force is acting).
1 atm = 14.7 psi = 101.325 KPa
psi : KPa
14.7 : 101.325
3000 : X
X = (3000 x 101.325)/14.7
= 20678.57 KPa
Therefore, 20678.57 KPa is the pressure in kPa.
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What is the quantity of heat (in kJ) associated with cooling 185. 5 g of water from 25. 60°C to ice at -10. 70°C?
Heat Capacity of Solid = 2. 092 J/g°C
Heat Capacity of Liquid = 4. 184 J/g°C
T Fusion = 0. 00 ° C
ΔH Fusion = 6. 01 kJ/mol
Taking into account the definition of calorimetry, sensible heat and latent heat, the quantity of heat associated with cooling 185. 5 g of water from 25. 60°C to ice at -10. 70°C is 37.88 kJ.
You should be aware that water freezes at 0 degrees Celsius. In other words, water freezes and turns into ice at 0°C.
To provide heat without changing state, you must drop the temperature from 25.60°C (in the liquid state) to 0°C (sensible heat).
A body's capacity to absorb or emit heat is determined by:
Q = c× m× ΔT
where T is the temperature variation and Q is the heat exchanged by a mass m body made up of a certain heat material c.
Q = c× m× ΔT
Q1= 4.184 × 185.5 g× (- 25.6 °C)
Q1= -19,868.98 J
The amount of heat required to cause a mass m of a certain substance to change phase is equal to
Q = m×L
where L, or the substance's latent heat, varies depending on the sort of phase shift.
Q = m×L
Q2= 10.30 moles×6.01 kJ/mol
Q2=61.903 kJ= 61,903 J
0 °C to -10.70 °C
Similar to sensible heat previously calculated, you know:
Q = c× m× ΔT
c = Heat Capacity of Solid = 2.092
m= 185.5 g
ΔT= Tfinal - Tinitial= -10.70 °C - 0 °C= -10.70 °C
Replacing:
Q = c× m× ΔT
Q3= 2.092 × 185.5 g× (-10.70) °C
Q3= -4,152.3062 J
The following formula is used to get the total amount of heat needed:
Total amount of heat needed = Q1 + Q2 + Q3
Total energy needed is equal to -19,868.98 J + 61,903 J – 4,152.3062 J.
Total heat required= 37,881.7138 J= 37.8817138 kJ= 37.88 kJ
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add electron dots and charges as necessary to show the reaction of potassium and bromine
Potassium releases one electron, which the element bromine accepts. Potassium becomes a cation with a positive charge during this process, while bromine will become an anion with a negative charge.
Potassium: What is it?The mineral potassium is a required element for all bodily tissues. It is commonly referred to as electrolyte since this carries just little charged particles that causes a range of neuron of neuron functions. Available both as a nutraceuticals and naturally occurring in several foods, potassium is accessible.
How is potassium used by the body?Potassium can be found in many foods naturally and as dietary supplements. Its major goal is to aid the normal maintenance of lymphatic drainage in our cells. Sodium, on the other hand, maintains proper fluid levels within cells.
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Classify each of the following diatomic species as ionic, polar covalent or nonpolar covalent. Bra CsBr NaCl Cao HCI 02 KE HBr Ng BIF lonic Polar Covalent Nonpolar Covalent Categorize each of the following molecules according to what type of exception to the octet rule it is. SO, XeF. BeCl3 NO, NO OCI PFS NH, AICI BF, PO CF Electron Deficient Odd Electron Species Expanded Octet Obeys the octet rule
The Nernst equation connects the standard cell potential to the effective concentrations (activities) of the reaction's constituent parts. Br2 is a nonpolar covalent substance. Ionic substances include CsBr, NaCl, CaO, HCl, O2, KF, and HBr. Polar substances include HBr.
What do you mean by molecule?With this designation, the phrase's original definition—"the smallest unit of a material that yet preserves the attributes of that substance"—would be fully encapsulated. An atom is a body that cannot be divided into two, and a molecule is the tiniest unit of a certain material, according to James Maxwell's definition from 1873. A molecule is a collection of two or more atoms that constitutes the smallest discernible unit into which a pure substance can be divided while retaining its chemical makeup and other physical characteristics. molecular structure illustrations.
How many is a molecule?A group of two or more atoms bound together by the attractive forces known as chemical bonds is referred to as a molecule; depending on the context, the term may or may not include ions that meet this requirement. When two or more atoms of the same or different element are joined together, they form a molecule. A molecule can be homonuclear, meaning it is made up of atoms of the same chemical element, such as oxygen (O2), or it can be heteronuclear, meaning it is made up of more than one element, such as water (H2O).
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scientist wants to make a solution of tribasic sodium phosphate, na3po4 , for a laboratory experiment. how many grams of na3po4 will be needed to produce 275 ml of a solution that has a concentration of na ions of 0.500 m ?
How much Na3PO4Na3PO4 is required to make 575 mLmL of the a solution with a 1.50 MM Na+Na+ ion concentration.
How are moles calculated?The symbol for the unit is mol.
The number of molecules ratio is written as follows.
Given.
The formula for moles is.
Mass of material / Mass from one mole equals the number of moles.
95 / 86.94 equals the number of moles.
How can you fix the limited reactant issue?By dividing the amount of each solutions by its molarity, you can figure out the molecular weight of each reactant. By dividing the amount of units of every reaction by its equimolar coefficient in the chemical equation, you may determine which chemical is the limiting one.
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A solution contains 2.2 x 10^-4 M Ag+ and 1.3 x 10^-3 M Pb^2+.
If NaI is added, will AgI (Ksp = 8.3 x 10^-17) or PbI2 (Ksp = 7.9 x 10^-9) precipitate first?
Specify the concentration of I- needed to begin precipitation.
AgI will be the first to precipitate. [I-] = 4.2 x 10-13 M for AgI
[I-] = 2.3 x 10-3 M for PbI2.
What exactly do you mean by precipitate?: to fall or become suddenly ill. : to move or act in a violent or unwise manner. 3. to extricate from a suspension or solution.
Is precipitate synonymous with soluble?In chemistry, a precipitate is an insoluble solid that develops from a liquid solution. Precipitation is the process by which an insoluble solid emerges from solution. The precipitate is frequently released as a suspension. Precipitates are created when two soluble salts combine in a solution to produce one or more insoluble products.
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ASAP PLEASE!!
Suppose that you want to remove the barium ions from 186.71 mL of 0.327 mol/L
aqueous barium nitrate solution. What is the minimum mass of sodium carbonate
that you should add?
The mass of the sodium carbonate that is required is 6.36 g.
What is the amount of the sodium carbonate that we need?No we know that the reaction that we want to carry out here is the kind of reaction that we call the precipitation reaction and we are trying to remove the barium ions by the use of sodium carbonate and in the process the barium would be removed as barium carbonate.
We have to look at the stoichiometry of the reaction which would be key as we try to obtain the mass of the sodium carbonate that we need in the reaction.
Number of moles of the barium ions = 0.327 M * 186.71/1000 L
= 0.06 moles
Given that the reaction between the carbonate ions and the barium ions is 1:1. mass of the sodium carbonate required = 0.06 moles * 106 g/mol
= 6.36 g
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morphine is administered as the hydrochloride salt. adapt the structure below in the blue box to show the hcl salt. explain why the hydrochloride salt is used in the green box.
It is possible to obtain morphine as a hydrochloride salt. Morphine is present in it. opium's main alkaloid and the original narcotic and analgesic opiate, morphine. Both central nervous system & smooth muscle are just two areas where morphine has wide-ranging effects.
Hydrochloride morphine: what is it?a medication for the management of moderate to extreme pain. Certain kinds of coughs may also be treated with it. With the help of opiate receptors within the central nervous system, morphine is converted into hydromorphone hydrochloride. It is both a kind of analgesic and an opioid.
What is morphine called?The class of drugs known as narcotic analgesics includes morphine (pain medicines). It alleviates pain by acting just on central nervous system (CNS).
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what is a solute?group of answer choicesa homogeneously dispersed mixturea substance that dissolves into another substancea substance, usually a liquid, which dissolves other substancesa mixture of two or more substancesa heterogeneously dispersed mixture
A mixture in which one substance dissolves in the other is called a solution. The solute seems to be the material that absorbs.
What is solution and example?A homogenous mixture of two or more substances with particles smaller than 1 nm is referred to as a solution. Solutions are available in various forms, such fizzy water, sugar and salt solutions, and others. Every element in a solution appears to be a single phase.
Which is a characteristic of a solution?Solutions are homogenous mixes made up of at least two solutes and one solvent. The material that dissolve is regarded as the solute. The dissolved medium is the solvent.
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what is the process by which nitrate ions and nitrite ions are converted into nitrous oxide gas and nitrogen gas (n2)?
When nitrate is transformed into gaseous forms of nitrogen, including nitric oxide, nitrous oxide, as well as dinitrogen gas, denitrification takes place.
What food items are nitric oxide-rich?Our bodies naturally produce nitric oxide from the nitrates and prevalent in diet. Dark green leafy foods including kale, arugula, Swiss chard, even spinach are excellent suppliers. Beets, cabbage, cauliflower, radishes, and broccoli are additional good sources.
What affects the heart does nitric oxide have?A potent receptor that promotes circulation and encourages blood arteries relax is nitric oxide. According to some data, arginine may enhance blood flow via the heart's arteries. That might lessen the indications of chest pain, clogged arteries, etc.
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choose the combination of factors that would lead to the greatest oxygen unloading from hemoglobin.
Low pH, high temperature, high Peoz, high 2,3-BPG
O Low pH, high temperature, low Pooz. high 2,3-BPG
O High pH, low temperature, low Pc02, low 2,3-BPG
High pH, high temperature, high Pcoz. low 2,3-BPG
The combination of factors that would lead to the greatest oxygen unloading from hemoglobin is Low pH, high temperature, high Pco2, high 2,3-BPG. Hence the correct option is (a).
This is because all of these factors shift the oxygen-hemoglobin dissociation curve to the left, making it easier for oxygen to dissociate from hemoglobin and be released into the tissues. The oxygen-hemoglobin dissociation curve is a graph that shows the relationship between the partial pressure of oxygen (P02) and the amount of oxygen bound to hemoglobin (HbO2) in blood. The curve shows that as the partial pressure of oxygen increases, more oxygen binds to hemoglobin, and as the partial pressure of oxygen decreases, less oxygen binds to hemoglobin. The curve is sigmoid in shape, with a steep portion at low oxygen pressures (representing the unloading of oxygen in the tissues) and a flatter portion at high oxygen pressures (representing the loading of oxygen in the lungs). Factors such as pH, temperature, carbon dioxide pressure (Pco2) and 2,3-bisphosphoglycerate (2,3-BPG) can shift the curve to the left or right. A leftward shift of the curve makes it easier for oxygen to dissociate from hemoglobin, and a rightward shift makes it harder for oxygen to dissociate from hemoglobin.
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Describe the key features of the Sun.
The Sun is composed of about 75% hydrogen, 25% helium, and trace amounts of heavier elements.
What are the key features of the Sun?Our Sun is a star and it is the near star to planet Earth. The Sun is also the largest thing in our solar system and it contains most of the mass in the whole solar system. Because the Sun has the greatest mass it also has a substantial force of gravity in the solar system.
Without the Sun's heat and light, the Earth would be a lifeless ball of ice-cover rock. The Sun warms our seas, stirs our atmosphere, causes our weather patterns,
So we can conclude that At its core, the Sun's temperature extends over 15 million K (27 million°F) and its pressure is over 200 billion times the pressure at Earth's surface.
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how many kilojoules of heat are absorbed when 40.5 g of mgo(s) is decomposed into mg(s) and o2(g) at constant pressure?
Decomposed into mg(s) and o2(g) at constant pressure is = −185.8⋅kJ if
40.5 g kilojoules of heat are absorbed at constant pressure .
How is kJ calculated?Essentially, the difference between calories and kilojoules is terminology - they're two different ways of measuring the energy contained in food and the energy we expend. You can convert calories to kilojoules by multiplying the calories by 4.2.
How many kilojoules burn 1kg?If you want to lose a kilogram of lean mass, such as muscle, the total energy deficit you need is about 7600 kilojoules. But to lose a kilogram of body fat, the energy deficit has to be about five-times greater, around 39,500 kilojoules.
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2. How many grams of glucose will be
produced by plants using 760.0 grams of
carbon dioxide and a sufficient amount of water?
Answer:The process of photosynthesis in plants converts carbon dioxide and water into glucose and oxygen. The balanced equation for this reaction is:
6 CO2 + 6 H2O --> C6H12O6 + 6 O2
This equation tells us that for every 6 molecules of carbon dioxide (CO2) that are consumed, 1 molecule of glucose (C6H12O6) is produced, along with 6 molecules of oxygen (O2).
Given that we have 760.0 grams of carbon dioxide and a sufficient amount of water, we can use the balanced equation and the molar mass of glucose to calculate the amount of glucose that will be produced.
First, we need to convert the given amount of carbon dioxide to moles. We can do this by using the molar mass of carbon dioxide, which is 44.01 g/mol.
760.0 g CO2 / 44.01 g/mol = 17.3 moles CO2
Next, we can use the balanced equation to determine the number of moles of glucose that will be produced. Since the ratio of CO2 to glucose is 6:1, for every 6 moles of CO2, 1 mole of glucose will be produced.
17.3 moles CO2 / 6 = 2.88 moles glucose
Finally, we can convert the number of moles of glucose to grams using the molar mass of glucose, which is 180.16 g/mol
2.88 moles glucose * 180.16 g/mol = 517.3 grams glucose
Therefore, plants will produce 517.3 grams of glucose using 760.0 grams of carbon dioxide and a sufficient amount of water.
Explanation:
Compute the atomic packing factor for the rock salt crystal structure in which rC/rA=0.414.
The APF for the rock salt crystal structure with rC/rA = 0.414 is 0.68.
What is atomic packing factor?The atomic packing factor (APF) of a crystal structure is a measure of how closely packed the atoms are in the crystal lattice. It is calculated by dividing the total volume of all the atoms in the cell by the volume of the cell itself.
In the rock salt (NaCl) structure, rC (the radius of the chloride ion) is 0.414 times the radius of the sodium ion, rA. The APF for this structure is calculated as follows:
APF = (4 * (rA + rC)^3) / (a^3)
Where a is the lattice parameter of the crystal (the length of the side of the unit cell).
Plugging in the values, we get:
APF = (4 * (1.88 + 0.75)^3) / (5.64^3)
APF = 0.68
Therefore, the APF for the rock salt crystal structure with rC/rA = 0.414 is 0.68.
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how much heat in kj is produced when 2.5 mol of fe3o4 reacts with excess al? 3 fe3o4(s) 8 al(s)
-6278 kJ of heat is produced when 2.5 mol of fe3o4 reacts with excess Al. For the equation 3 Fe3O4(s) + 8 Al(s) → 9 Fe(s) + 4 Al2O3(s).
The heat produced when 2.5 mol of Fe3O4 reacts with excess Al can be determined by using the balanced equation for the reaction and the appropriate enthalpy values.
The balanced equation for the reaction is:
3 Fe3O4(s) + 8 Al(s) → 9 Fe(s) + 4 Al2O3(s)
The enthalpy change for the reaction is the sum of the enthalpies of formation of the products minus the sum of the enthalpies of formation of the reactants. ΔH = [9(ΔHf of Fe(s)) + 4(ΔHf of Al2O3(s))] - [3(ΔHf of Fe3O4(s)) + 8(ΔHf of Al(s))]
Using the standard enthalpies of formation, ΔHf of Fe3O4=-824.2 kJ/mol, ΔHf of Fe=-44.1 kJ/mol, ΔHf of Al2O3=-1675.9 kJ/mol, ΔHf of Al=-1675.9 kJ/mol
ΔH = [9(-44.1 kJ/mol) + 4(-1675.9 kJ/mol)] - [3(-824.2 kJ/mol) + 8(-1675.9 kJ/mol)]
ΔH = -2511.2 kJ/mol
Therefore, the heat produced when 2.5 mol of Fe3O4 reacts with excess Al is -2511.2 kJ/mol * 2.5 mol = -6278 kJ
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Consider this reaction occurring at 298 K: BaCO3(s) ⇌ BaO(s) + CO2(g)Substance ∆rH o / kJ mol–1 ∆rS o / J mol–1 K –1 BaCO3(s) –1213.0 112.1 BaO(s) –548.0 72.1 CO2(g) –393.5 213.8a. Using the information in the table above, show that the reaction is not spontaneous under standard conditions by calculating ∆rG o . {5 marks}b. If BaCO3 is placed in an evacuated flask, what partial pressure of CO2 will be present when the reaction reaches equilibrium? {3 marks}c. Can the reaction be made more spontaneous by an increase or decrease in temperature? If so, what temperature is required to make the reaction spontaneous under standard conditions? {3 marks}d. What temperature is required to produce a carbon dioxide partial pressure of 1.5 bar? {3 marks}
-1398.7 kJ/mol is ∆rG o is negative, the reaction is not spontaneous under standard conditions for given reaction.
What is equilibrium?Equilibrium is a state of balance in which all forces and influences are equal. It is a state of rest or balance due to the equal action of opposing forces. In economics, equilibrium is a state in which the market price of a good or service is stable and no tendency to change. This occurs when there is no excess demand or supply, and all participants in the market have perfect information.
a. ∆rG o = ∆rH o - T∆rS o
∆rG o = -1213.0 kJ/mol - (298 K)(112.1 J/mol K) = -1398.7 kJ/mol
b. When the reaction reaches equilibrium, the partial pressure of CO2 will be equal to zero, as the reaction is not spontaneous under standard conditions, and therefore no CO2 will be produced.
c. The reaction can be made more spontaneous by decreasing the temperature. The temperature required to make the reaction spontaneous under standard conditions can be calculated by setting ∆rG o to zero and solving for T.
d. To produce a carbon dioxide partial pressure of 1.5 bar, the reaction must be forced to proceed in the reverse direction, i.e the reaction must be made non spontaneous.The increase in temperature is necessary to do this. We can use the equation ∆rG o = ∆rH o - T∆rS o and plug in the values of ∆H o, ∆S o and P to solve for T.
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A eukaryotic cell can use glucose (C6H12O6) and hexanoic acid (C6H14O2) as fuels for cellular respiration. On the basis of their structural formulas, which substance releases more energy per molecule on complete combustion to CO2 and H2O. A. Glucose B. Hexanoic acid C. Both molecules release the same amount of energy
Glucose releases more energy per molecule on complete combustion to CO2 and H2O than hexanoic acid.
What is hexanoic acid?Hexanoic acid is a saturated fatty acid with a six-carbon chain and one carboxylic acid group. It is used as a food preservative, a flavoring agent, and a fragrance in cosmetics. It can also be found in animal sweat, and is a major component of cow milk. Hexanoic acid has antimicrobial properties, making it an effective preservative for food and cosmetics. It has a sour taste and a pungent odor, and can be combined with other compounds to create a pleasant smell. Hexanoic acid is used in the production of many foods, including cheese, pickles, and other fermented foods.
This is because glucose has more oxygen atoms per molecule than hexanoic acid, and oxygen is an important component in the combustion of a molecule. When a molecule of glucose is completely combusted, it yields 6CO2 and 6H2O, while a molecule of hexanoic acid yields 5CO2 and 6H2O. Since glucose yields a greater number of CO2 and H2O molecules in the process of combustion, it is able to generate more energy per molecule than hexanoic acid.
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using a ph meter, the ph of a clear solution was found to be 2.14. this solution can be classified as:
The PH at 2.14 upon using a ph meter of a clear solution, will be classified as an acidic solution.
What is a PH meter?An equipment called a pH metre is used to determine the acidity or alkalinity of a solution, commonly known as pH. The unit of measurement used to express how acidic or alkaline something is is called pH. It is rated from 0 to 14 on a scale. The pH value's quantitative data expresses the level of an acid or base's activity in terms of hydrogen ion activity. The ratio of the quantities of hydrogen ions (H+) and hydroxyl ions (OH-) determines a substance's pH value.
The pH of a clear solution found to be 2.14 using a pH meter, this solution can be classified as acidic. The pH scale ranges from 0 to 14. A pH of 7 is considered neutral, with anything below 7 being acidic, so a pH of 2.14 is highly acidic.
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