The pH of a solution is a measure of its acidity or basicity. If the pH in beaker a is 5.20, the pH in beaker B is 4.20.
pH Difference between Beaker A and Beaker BThe pH of a solution is a measure of its acidity or basicity, which is calculated based on the concentration of hydrogen ions (H+) present in the solution. A pH value of 7 represents neutral, whereas values below 7 indicate an acidic solution, and values above 7 indicate a basic or alkaline solution. In the two molecular scenes provided, the concentration of H3O (purple) ions is shown in solutions of the same volume. In beaker A, the concentration of H3O ions is higher, resulting in a lower concentration of hydrogen ions (H+) in the solution and thus a higher pH of 5.20. In contrast, the concentration of H3O ions in beaker B is lower, resulting in a higher concentration of hydrogen ions (H+) and a lower pH of 4.20.
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Sulphuric acid reacts with most bases to give the corresponding _________ .
For most bases, sulfuric acid reacts as an acid to form the equivalent sulfate.
What is the function of sulfuric acid?Hydrochloric acid is a crucial commodity ingredient utilized largely in the synthesis of phosphate in contemporary industry. Metal makers use it in huge amounts because it is efficient at removing corrosion from iron and steel. The substance sulfuric acid is highly dangerous.
Sulfuric acid: Is it a potent acid?Strong acid that is water soluble is strong acid (H2SO4, oil of vitriol). Among the most widely manufactured compounds, it is employed in the creation of fertilizers, the treatment of ores, and the refinement of crude oil.
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Which molecule will engage in the strongest dispersion forces?
Iodine atoms are larger than those of the other halogens listed, making them the biggest molecule. It will have the best ability to engage in dispersion forces because it is the largest molecule.
Which alkane has the greatest forces of dispersion?Long chain length molecules have stronger London Dispersion Forces. Larger molecules have more places to attract other molecules, which is why this is the case. The C9H20 has a larger dispersion force than all the other alkanes on the list because of this.
How can the highest dispersion force be determined?The quantity of electrons in an atom or molecule tends to increase the strength of dispersion forces. The composition C8H18 will have the strongest dispersion forces since it contains a lot more electrons than any of the other compounds.
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be sure to answer all parts. what is the poh of 0.0157 m koh? is the solution acidic, neutral, or basic? acidic neutral basic
Answer:
Explanation:
Potassium hydroxide fully ionizes when dissolved in water according to the following equation:
K
O
H
→
K
+
+
O
H
−
Now, let's find the relationship between
K
O
H
and
O
H
−
1
:
1
ratio
⇒
[
K
O
H
]
=
[
O
H
−
]
=
6.7
×
10
−
3
M
In any aqueous solution,
[
H
3
O
+
]
and
[
O
H
−
]
must satisfy the following condition:
[
H
3
O
+
]
[
O
H
−
]
=
K
w
[
H
3
O
+
]
=
K
w
[
O
H
−
]
[
H
3
O
+
]
=
1.0
×
10
−
14
6.7
×
10
−
3
[
H
3
O
+
]
=
1.5
×
10
−
12
M
p
H
=
−
log
[
H
3
O
+
]
p
H
=
−
log
[
1.5
×
10
−
12
]
p
H
=
11.83
Is there any material made of two or more substances that can be physically separated?
When two or more chemical substances (elements or compounds) are mixed together, a heterogeneous mixture is one in which the various components are easily distinguishable visually and physically.
What may be physically separated from a material that contains two or more substances?A mixture is a substance that can be physically separated from two or more other substances. There are numerous varieties of mixes.
What can't simply be separated from a combination of two or more substances be called?Homogeneous mixtures are those in which the composition is constant throughout. The mixture's components are difficult to separate. Solutions are another name for these kinds of mixes. A nice illustration of a homogenous combination is a cup of coffee.
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How many liters are in 223.5G of C2H6 gas? A.7.4L B.116.4LC. 9.9LD. 15.4L
in 223.5G of [tex]C_2H_6[/tex] gas there are Option D. 15.4L. The conversion of 223.5 grams of [tex]C_2H_6[/tex] (Ethane) gas to liters involves the calculation of the molar volume of the gas at a specific temperature and pressure.
The molar volume of a gas is the volume occupied by one mole of the gas. The molar volume of a gas is proportional to its temperature and pressure, and at standard temperature and pressure (STP), it is 24.45 L/mol. To convert the mass of the gas to moles, we need to use the molar mass of [tex]C_2H_6[/tex], which is 30.07 g/mol. Finally, the number of moles can be multiplied by the molar volume to obtain the volume of the gas in liters. The final answer is 15.4 L.
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Calculate the mass of copper(II) oxide produced. Show work!
Cu(OH)2 → CuO + H₂O
FW CuO 79.545 g
g CuO =
Please I need it quickly
Explanation:
Cu(OH)2 → CuO + H₂O
FW CuO 79.545 g
g CuO = 0.75 mol x 79.545 g/mol = 59.659 g
PLEASE HELPPPPP NOWWWW
What is the molecular formula for a compound that is composed of 44.45 g of carbon,3.73 g of hydrogen, and 51.82 g of nitrogen and a molecular weight of 81.09 g/mol.
a. What is the empirical formula of this compound?
b. What is the molecular formula of this compound? Show work for everything please
A.The empirical formula is CHN, with a ratio of 1:1:1.
B.This means that the molecular formula is 3 times the empirical formula, or C3H3N3.
How to find the molecular formula of a compound?A. To find the empirical formula, we need to determine the ratio of the elements in the compound. We can do this by converting the masses of each element to moles and dividing by the smallest number of moles:
Carbon: 44.45 g / (12.01 g/mol) = 3.70 mol
Hydrogen: 3.73 g / (1.01 g/mol) = 3.69 mol
Nitrogen: 51.82 g / (14.01 g/mol) = 3.71 mol
Smallest number of moles: 3.69
Ratios:
Carbon: 3.70 mol / 3.69 mol = 1.00
Hydrogen: 3.69 mol / 3.69 mol = 1.00
Nitrogen: 3.71 mol / 3.69 mol = 1.01
The empirical formula is CHN, with a ratio of 1:1:1.
B. To find the molecular formula, we need to find the smallest whole number ratio that gives us the molar mass of 81.09 g/mol. We can do this by dividing the molar mass by the molar mass of the empirical formula:
81.09 g/mol / (12.01 g/mol + 1.01 g/mol + 14.01 g/mol) = 81.09 g/mol / 27.03 g/mol = 3.00
This means that the molecular formula is 3 times the empirical formula, or C3H3N3.
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Single, double & triple bond covalent bonds contained a)only one hybrid orbital. b)no hybrid orbitals c)only hybrid orbitals d)none of these
Covalent bonds only hybrid orbitals. The correct option is C
What is covalent bond?
Covalent bond is formed by the sharing of electrons between two atoms. Single, double, and triple covalent bonds refer to the number of electrons that are shared between the atoms.
In single covalent bonds, one electron from each of the participating atoms is shared, while in double covalent bonds, two electrons from each of the atoms are shared, and in triple covalent bonds three electrons are shared.
To form these bonds the atomic orbitals of the participating atoms must overlap to form hybrid orbitals. Hybrid orbitals are created by combining two or more atomic orbitals to create new orbitals with different shapes and energies. These hybrid orbitals are used to form the covalent bonds.
Therefore, covalent bonds contained only hybrid orbitals.
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Why does the size of an atom decrease as you move from left to right across a period on the periodic table?
Since every element's electrons in an interval have roughly equal amounts of energy, the nucleus has more "pulling strength" as the number of protons increases.
What do you call an electron?Subatomic particles known as electrons have an elementary force of magnitude -1. The magnitude of an electron's charge is equivalent to that of a proton. The number of both protons and electrons in electrically neutral atoms and molecules must thus be equal.
What materials make up electrons?In contrast to electrons, neutrons and protons are comprised of quarks. We believe that quarks and electron are basic particles that are not composed of lesser subatomic particles.
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Compared to clouds, fogs are?
Fog is a low-lying cloud of microscopic water droplets that is thick enough to impair horizontal visibility to under 1,000 meters.
What is fog?Fog is a low-lying cloud of microscopic water droplets that is thick enough to impair horizontal visibility to under 1,000 meters. The terms "ice fog" and "smoke fog" can also be used interchangeably to describe clouds containing both elements.
Depending on whether the obscurity is brought on by water droplets or solid particles, the phenomena is referred to as a mist or haze under comparable circumstances but with visibility more than 1,000 meters. Water vapor condenses on water vapor condenses that are constantly present in outdoor air to create fog.
Therefore, fog is a low-lying cloud of microscopic water droplets that is thick enough to impair horizontal visibility to under 1,000 meters.
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a new penny has a mass of 2.49 g and a volume of . is the penny made of pure copper? explain your answer.
It is not possible to determine if a penny is made of pure copper based solely on its mass and volume.
The composition of pennies has changed over time, and currently, U.S. pennies are made of a composition of 97.5% zinc and 2.5% copper. The mass and volume of a penny are not sufficient to determine the exact composition of the metal.
In order to determine the composition of a penny, more extensive analysis, such as chemical analysis or X-ray diffraction, would be needed. These methods can identify the elements present in the penny and their relative amounts, which would allow for a more accurate determination of the composition.
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a vincristine vial was found to have been broken and spilled. what should be used to clean up the spill?
If a vincristine vial is found to be broken and spilled then to properly clean the mess, a fully equipped chemo spill kit is used.
The chemo spill kit includes: Two pairs of nitrile gloves, a disposable safety gown, disposable shoe covers, a face shield covering the full face, 21 grams of solidifier, a scoop and scrapper, two wiper pads, a twist tie, and an ID tag.
Vincristine is a solution (liquid) that is administered into the vein. It is usually administered once a week. The drugs used during the process, the response of the body towards the drug and the type of cancer will determine the length of the treatment.
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How many atoms are present in 4 molecules of
NaOH ?
a.
8
b.
3
c.
9
d.
12
One NaOH molecule is made of one sodium atom , one hydrogen atom and one oxygen atoms. Hence, there are 3 atoms in one molecule of NaOH. Hence, there are 12 atoms in 4 molecules of NaOH.
What is NaOH ?NaOH, or sodium hydroxide is an ionic compound, formed by the sodium metal reaction with water or with the other hydroxides. Here, the sodium metal donates one electron to the OH- group.
A compound is made of a number of molecules. One mole of a compound contains Avogadro number of molecules. The mass of one mole of a compound is called its molar mass.
One NaOH molecule is made of one sodium atom , one hydrogen atom and one oxygen atoms. Hence, there are 3 atoms in one molecule of NaOH. Hence, there are 12 atoms in 4 molecules of NaOH.
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Rank from strongest to weakest solute-solvent interaction strengthA KCl in waterB CH2Cl2 in benzene (C6H6)C methanol (CH3OH) in water
A. CH2Cl2 in Benzene (C6H6) > B. Methanol (CH3OH) in water > C. KCl in water are the solute-solvent interactions with the strongest to weakest strengths, respectively.
Solute-Solvent Interaction: What is it?Intermolecular forces play a significant role in a solute's ability to dissolve in a solvent. The solubility increases with the strength of the attraction between the molecules of the solute and the solvent. Polar solvents, for instance, have a tendency to dissolve polar liquids.
What results from the interaction of the solute and solvent?Greater solubility is associated with strong solute-solvent interactions, whereas lesser solubility is associated with weak solute-solvent attractions. Conversely, non-polar solutes typically dissolve better in non-polar solvents, whereas polar solutes typically dissolve better in polar solvents.
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how does atomic excitation and de-excitation and the quantization of energy affect the emission spectra
Atomic excitation and de-excitation and the quantization of energy affect the emission spectra by determining the energy levels of an atom.
When an atom is excited, it absorbs a photon of a certain energy and moves to a higher energy level. When it de-excites, it emits a photon of a certain energy, which is related to the energy difference between the two energy levels.
As the energy levels of the atom are quantized, the energy of the photons emitted is also quantized. This results in an emission spectrum in which the photons emitted at different energies are seen as distinct lines or bands in the spectrum.
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what is the term for an electrochemical signal that enables a neuron to communicate with other cells?
"Action Potential" is the name for the electrochemical signal that allows neurons to communicate with neighboring cells.
An electrochemical signal is what?Electrochemical signals are those that are sent by neurons. An electric potential which goes along length of the cell is produced by a neuron after it has been triggered by a stimulus of some kind. The "electro" component of electrochemical is this.
What is the neuron's electrochemical signal that is traveling along it?A neuron's membrane conducts an electrical charge known as an action potential, commonly known as a nerve impulse. It can be produced when chemical inputs from a neighbouring cell alter a neuron's membrane potential.
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322 l of hydrogen occupies a volume of 197 l at stp. if the initial temperature of the hydrogen was 27° c, what was its initial pressure?
The initial pressure of hydrogen gas when it occupies 197L at STP is 1405.34 mmHg.
Modified Ideal Gas Law:
P = nRT / V
0.000089 g/ml is the density of hydrogen gas.
Volume times Density equals 322000 x 0.000089, which equals 28.658 g of hydrogen gas.
Mass / Molecular Mass = 28.658 / 2 = 14.32 moles of hydrogen gas are considered one mole.
Add value to the equation as follows:
P equals [(14.32) (0.08206 L atm mol 1 K)] (310 K. / 197 L
P = 1.84 atm
P = 1.84 atm x 760.0 mmHg atm 1 = 1405.34 mmHg
Theoretically, a gas called an ideal gas is made up of several randomly moving point particles that are not in contact with one another. Since the ideal gas law, a condensed equation of state, and statistical mechanics can be used to analyse it, the ideal gas notion is advantageous.
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Why does solution viscosity affect needle selection?
Answer:
Viscosity of a solution affects needle selection because it determines the resistance of the fluid to flow. Higher viscosity solutions are thicker and have a higher resistance to flow, while lower viscosity solutions flow more easily.
Explanation:
5 of 255 of 25 Items
06:09
Question
Predict which compound would have the highest melting point and explain why.
Responses
A SiO2 - It consists of a covalent network.SiO 2 - It consists of a covalent network.
B CO - It is polar and has dipole-dipole forces.CO - It is polar and has dipole-dipole forces.
C P2O5 - It has strong dipole-dipole forces.P 2 O 5 - It has strong dipole-dipole forces.
D CO2 - It has really strong dispersion forces.
The melting point of silicon dioxide SiO₂ is higher than the other given compounds because, It consists of a strong covalent network and the bond between Si-O is strong.
What is melting point ?Melting point of a substance is the temperature at which it converts from its solid state to liquid state where the solid phase and liquid phase are in equilibrium.
Melting point of the substance depends on bond type, molar mass, temperature, pressure and presence of impurities. It increases with increase in the strength of intermolecular bonds.
The more the bond strength more energy needed to apply to weaken the bonds and melt the compound. Among the given compounds, silicon dioxide is having stronger covalent bonds. Hence, option A is correct.
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How many grams of oxygen is present in 36g of water?
Answer:
32 gm O
Explanation:
there are 16 gm of O in each 18 gm of water ....the other two grams are H
so there would be 32 gm of oxygen in 36 gm water
ethylene glycol, c2h6o2, is infinitely miscible (soluble) in water. it is a nonelectrolyte that is used as antifreeze. what is the lowest possible melting point for engine coolant that is 29.7% ethylene glycol? the kf for water is 1.86 oc/m. enter your answer in units of degrees celsius.
The lowest possible melting point for engine coolant that is 29.7% ethylene glycol is -12.85° Celsius.
Depression in freezing or melting point can be given by using the formula:
[tex]T_{f} = i[/tex] × [tex]K_{f}[/tex] × [tex]m^{}[/tex], where:
'i' is the vant hoff factor, '[tex]K_{f}[/tex]' is the freezing point constant for water, and 'm' is the molality. as we know that, molality, m, can be given by the formula:
Molaltity = [tex]\frac{Mass-of -ethylene -glycol}{Molar-mass-of-ethylene-glycol * Mass-of-water-in-kg}[/tex]
Mass of ethylene glycol = 30 % of 100 g solution:
[tex]\frac{29.7}{100}[/tex] × [tex]100^{}[/tex] = 29.7g, rounding it off to 30 g
Mass of water = 100 - 30 = 70 g= 0.070 kg (1000g = 1kg)
Given, [tex]K_{f}[/tex], freezing point constant for water = 1.86° C/m
Thus, putting all these values in the above equation, we get:
[tex]T_{f}[/tex] = 1 × 1.86 × 30/ 62g/mol × 0.070
= 12.85° C (freezing point of 29.7% of ethylene glycol)
Now, calculating the lowest possible melting point:
Δ[tex]T_{f}[/tex] = [tex]T_{} - T_{f}[/tex] = 0 - 12.85 = -12.85° C
[ freezing point for water is 0° C]
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calculate the molality of a 5.36 m aqueous solution of ethylene glycol ((ch2oh)2, 62.068 g/mol) given that the density of this solution is 1.0405 g/ml.
The molality of a 5.36 m aqueous solution of ethylene glycol ((CH₂OH)₂, will be 0.065 mol/kg.
molality = (moles of solute) / (mass of solvent in grams)
Since the density of the solution is given, we can calculate the mass of the solution and then the mass of the solvent.
mass of solution = volume × density = 1 L × 1.0405 g/mL = 1.0405 g
mass of solute = mass of solution - mass of solvent = 1.0405 g - 1 L × (density of solvent)
Since water has a density of approximately 1 g/mL, the mass of solvent is 1 L × 1 g/mL = 1 g.
mass of solute = 1.0405 g - 1 g = 0.0405 g
moles of solute = mass of solute / molar mass of solute = 0.0405 g / 62.068 g/mol = 0.00065 moles
molality = (moles of solute) / (mass of solvent in grams) = 0.00065 mol / 1 g = 0.065 mol/kg.
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nonmembranous structure composed of two rodlike centrioles
It is a nonmembranous structure made up of two centrioles that resemble rods. During cell division, it aids in the distribution of chromosomes to new cells. the centrosome's composition and purpose.
What function does a centriole have during cell division?The division of cells is an issue for the centriole. As the cell cycle progresses, they aid in the creation of the spindle fibers that divide the chromosomes.
Does cell division occur without centroles?Organelles, active tiny structures that perform certain tasks for the cell, are abundant in cells. All multicellular species share several organelles, however the centriole is one cell component that is nearly uniquely present in animal cells.
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in a system of gas, if we double the temperature what happens to the energy of the particles?
The energy of particles increases whenever the temperature of the system increases.
What do you mean when you say "gas"?Any substance that is in the gaseous, or vaporous, phase of matter is referred to as a gas. When referring to matter that possesses the characteristics of a gaseous material, the term "gas" is also used to refer to the condition itself. The four fundamental states of matter are liquid, solid, plasma, and gas. Gases having no fixed volume or shape.
The characteristics of gas.In addition to being simple to compress and extend to occupy their containers, gases also take up a lot more space than that of the solids or liquids out of which they originate.
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14. 75 ml of 0.15 m nabr is mixed with 25 ml of 0.30 m cabr2. what is the concentration of bromide ions in the final solution?
The concentration of bromide ions in the final solution is 0.75/100 = 0.225 M.
The concentration of bromide ions in the final solution is 0.225 M. To calculate this, you need to add up the moles of bromide ions present in each solution.
In the 0.15 M NaBr solution, there are 0.15 moles of bromide ions. Similarly, in the 0.30 M CaBr2 solution, there are 0.60 moles of bromide ions. Therefore, the total number of moles of bromide ions in the combined solution is 0.75 moles. Since the total volume of the solution is 100 mL, the concentration of bromide ions in the final solution is 0.75/100 = 0.225 M.
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cinnamaldehyde is less polar than limonene because it has more carbon atoms. (True Or False)
False; cinnamaldehyde's higher carbon content does not make it less polar than limonene.
What is the purpose of cinnamaldehyde?An essential culinary flavour as well as a perfume odorant, cinnamonaldehyde. Additionally, it has been employed to get rid of mosquito larvae and deter adult mosquitoes. It is appropriate for organic agriculture since it occurs naturally.
Is cinnamon the same as cinnamonaldehyde?The flavor and aroma of the spice cinnamon are provided by a found naturally flavonoid called cinnamon aldehyde. It naturally exists in the bark of spice trees and other Cinnamomic species, including camphor and cassia. A clinical patch test can be used to determine someone's sensitivity to cinnamaldehyde.
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are body fluid compartments in a state of chemical equilibrium or disequilibrium? explain your answer and give an example.
The body fluid compartments in a state of chemical disequilibrium, for example, potassium ions in the cytoplasm of red blood cells, which are larger than the extracellular fluid.
The fluids in the body, namely water and electrolytes, are contained in two main compartments, namely intracellular fluid and extracellular fluid. Extracellular fluid is derived from body weight and interstitial fluid which consists of fluid in the serous cavities.
The body will perform homeostasis to maintain the stability and balance of osmotic fluids in the body. Fluids that come from food and drink enter the body and are distributed normally to all parts of the body through passive transport. However, some solutes are concentrated in several compartments, such as the cytoplasm of red blood cells, which have a potassium ion concentration that is 30 times greater than that of blood plasma. This causes a chemical imbalance, because it needs active transport which requires energy to fight the concentration gradient to achieve osmotic balance.
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name five primary air pollutants and give important sources for each
Monoxide, nitrogen oxides, particle pollution, hydrogen sulfide, and volatile organic substances are the top five air pollutants.
What air quality is the most dangerous?Carbon Monoxide
The burning of fuels in both industries and fuel engines generates NO2, the most hazardous of these compounds. High amounts can impede atmospheric vision and harm the animal heart and lungs.
What are the four primary types of pollutants?The pollutants that pose the greatest threat to public health include sulfur dioxide, ozone, nitrogen dioxide, monoxide, and particulate matter (PM, CO, O3, and NO2) (SO2). Both brief and deepening to these different pollutants can result in health concerns.
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the vapor pressure of pure water at 85c is 434 torr. what is the vapor pressure at 85 c of a solution prepared from 263 ml of water (density
The vapor pressure of pure water at 85°C is 434 torr, the vapor pressure of the solution will also be 434 torr.
The vapor pressure of a solution depends on the mole fraction of solute in the solution. If the solution contains a solute that does not participate in the vapor pressure, then the vapor pressure of the solution will be equal to the vapor pressure of pure water at the same temperature.
If the solution contains 263 mL of water, the number of moles of water can be calculated as follows:
mass of water = 263 mL * density of water = 263 mL * 1 g/mL = 263 g
number of moles of water = mass of water / molar mass of water = 263 g / 18.015 g/mol = 14.54 mol
Since the vapor pressure of pure water at 85°C is 434 torr, the vapor pressure of the solution will also be 434 torr.
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Match the reaction type with the correct chemical equation. (All the equations are unbalanced)
[tex]H_2 + Cl_2 -- > HCl[/tex] - synthesis reaction
[tex]Na + CuO_2 -- > Na_2O + Cu[/tex] - single replacement reaction
[tex]H_2O_2 -- > H_2 + O_2[/tex] - decomposition reaction
[tex]C_9H_{12} + O_2 -- > CO_2 + H_2O[/tex] - combustion reaction
Types of reactionsThere are different types of reactions based on the reactants and the products formed from reactions. Some of them are:
Synthesis reactions: where two or more reactants come together to form a single product. A + B --> CSingle replacement reaction: where atoms of elements displace or replace atoms of other elements from a compound. A + BC --> AB + CDecomposition reactions: where a compound breaks into two or more different products. AB ---> A + BCombustion reactions: where a compound burns in oxygen to produce one or more products.More on types of reactions can be found here: https://brainly.com/question/14203092
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