According to the claim, the substance in question is barium chloride, also known as BaCl₂.
Why is solid so crucial?For the purpose of overcoming these unfavorable design patterns, the SOLID tenets were created. Reducing dependencies allows engineers to alter one component of software without affecting others, which is the main objective of the SOLID principles. They are also meant to make designs simpler to comprehend, update, and expand.
A solid thing is what?A solid is distinguished by its rigidity and tolerance to external forces. A solid substance, unlike a liquid, doesn't quite flow to conform to the form of its containers or, like a gas, expand to cover the entire space.
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The complete question is-
You are presented with a white solid and told that due to carless labeling it is not clear if the substance is barium chloride, lead chloride or zinc chloride. When you transfer the solid to a beaker and add water the solid dissolves to give a clear solution. Next a Na2SO4 (aq) solution is added and a white precipitate forms. What is the identity of the unknown white solid?
a). BaCl₂
b). CaCO₃
c). MgCl₂
on the resonance hybrid for no−2, in between the nitrogen atom and each oxygen atom there is:
N-O bond as well as a double bond. The N atom possesses a positive charge and an unpaired electron. These are the two principal resonance sources of NO2.
Because each nitrogen atom requires three electrons to fill its outermost shell, nitrogen atoms will establish three covalent bonds (also known as triple covalent) between two nitrogen atoms. Methane (CH4) is another molecule that contains a nonpolar covalent link. There are two sigma bonds and one pair of unpaired electron in nitrogen dioxide. There are an octet of electrons in each of the two oxygen atoms. With the oxygen atom, the nitrogen atom's p orbital forms a pi connectio
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if a grating with more lines per unit length were used, how would the observed angles or spread of the spectra be affected?
Grating with more lines per unit length is given by, (a + b) sin (theta n)=n ( lambda), where, a + b is grating element, the distance between two consecutive slits, n is order of principal maxima and Lambda is wavelength of light.
Consider the first order maximum on either side of central maximum. For first order n=1. Therefore ,
sin(theta 1)=(lambda)/(a + b).
If we increase the number of lines of grating, correspondingly the grating element (a + b) decreases , hence diffraction angle becomes large for given wavelength . But, then there is limit on number of lines, because sin(theta) should not become greater than 1. However, within reasonable limit on number we can get better resolution that is more angular separation of spectral lines by increasing lines of the plane diffraction grating.
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a certain liquid x has a normal freezing point of -9.30 and a freezing point depression constant . calculate the freezing point of a solution made of of iron(iii) chloride
The supplied statement states that the supplied solution's freezing point is -12.1 °C.
What in chemistry is a solution?In chemistry, a solution is a homogeneous combination of two or more compounds in their relative proportions, which may be constantly changed up to what is known as the limit to solubility. Although solutions of vapors and particles are possible, the term "solution" is most frequently used to refer to the liquid condition of matter.
Briefing:FeCl₃ is dissolved, and X (the solvent) is a liquid.
Freezing point of X [tex]\left(T_f^0\right)[/tex] = -4.50°C
Depression constant ([tex]K_{f}[/tex]) = 1.82°C kg/mol
Weight of FeCl₃ = 0.11 kg = 0.11 * 10³g
Weight of X = 650 g = 650 * 10⁻³ kg
Freezing point of solution ([tex]T_{f}[/tex]) = ? ( In °C )
Therefore, we first determine the molality, and then we determine the freezing point of the solution using the depression in freezing idea.
As FeCl₃ dissociates in liquid.
Fe³⁺ + 3Cl⁻ → i.e. total 4 ions
So, vary Hoff factor for FeCl₃ = 4
We know,
Molar mass of FeCl₃ = 162.2g/mol
Calculation:
Molarity of solution (m) = moles of solute/amount of solvent
= Mass of FeCl₃/Molar mass of FeCl₃ * 1/ Mass of X
= 0.11 * 10³/162.2 * 1/ 650 * 10⁻³
= 1.0433 moles/kg
Now from depression for freezing point concept,
We have,
Δ[tex]T_{f}[/tex] = i * [tex]K_{f}[/tex] * m
[tex]T_f^0[/tex] - [tex]T_{f}[/tex] = i * [tex]K_{f}[/tex] * m
[tex]T_{f}[/tex] = [tex]T_f^0[/tex] - i * [tex]K_{f}[/tex] * m
= -4.50 - 4 * 1.82°C * 1.0433
[tex]T_{f}[/tex] = -12.1°C ( Freezing point of solution ).
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A newly discovered gas, gas Q, travels 3.40 times faster than carbon dioxide. What is the molar mass of gas Q?
Answer:6.241
Explanation :Step 1: List the known quantities and plan the problem.
Step 2: Solve. n=PVRT=0.987atm×0.677L0.08206L⋅atm/K⋅mol×296K=0.0275mol. Now divide g by mol to get the molar mass. ...
Step 3: Think about your result. The R value that corresponds to a pressure in atm was chosen for this problem.
How moles are present in 0.05g of sodium hydroxide the relative formula mass of sodium hydroxide is 40
The number of moles of sodium hydroxide in 0.05 grams can be calculated using the formula:
Number of moles = mass / molecular weight
The molecular weight of sodium hydroxide is 40 grams per mole, so the number of moles in 0.05 grams of sodium hydroxide is:
Number of moles = 0.05 grams / 40 grams/mol = 0.00125 moles
Thus, there are 0.00125 moles of sodium hydroxide in 0.05 grams of the substance. This is a very small amount, as one mole of any substance contains 6.022 x 10^23 atoms or molecules.
Which would you expect to be a conductor of electricity in the solid state? O iodine (12) O silver spoon (Ag) O lime (CaO)
Silver spoon (Ag) is a conductor of electricity in the solid state.
What is electrical conductors?Since a conductor presents little to no resistance to the passage of electrons, which results in an electrical current, a conductor carries electricity. Generally speaking, excellent electrical conductors include metals, metal alloys, electrolytes, and even some nonmetals, such as graphite and liquids, including water.An item or category of material that permits the movement of charge in one or more directions is referred to as a conductor in physics and electrical engineering. Metals are frequently used as electrical conductors in materials.Common electrical conductors include copper, silver, aluminium, gold, steel, and brass. Silver, copper, and gold are the metals with the highest conductivity.Learn more about electrical conductors refer to :
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when a h atom absorbs an ultraviolet photon with the correct energy, what transition can the electron in the atom undergo?
When an H atom absorbs an ultraviolet photon with the correct energy, the electron in the atom can undergo a transition from the fifth energy level (n=5) to the first energy level (n=1).
This type of transition is called a "quantum jump" and is associated with the emission of a photon. When an H atom absorbs an ultraviolet photon with the correct energy, it will move from its ground state to an excited state.
This excitation of the electron can then lead to further processes such as the emission of a photon or the formation of an ion-pair. Therefore the correct answer is D)n=5 to n=1 when the H atom absorbs an ultraviolet photon with the correct energy
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complete question:
when a H atom absorbs an ultraviolet photon with the correct energy, what transition can the electron in the atom undergo?
A)n=1 to n=5
B)n=2 to n=6
C)n=6 to n=2
D)n=5 to n=1
chemicals such as ozone or sulfate/nitrate, which are transformed in the presence of sunlight, water, oxygen or other compounds are known as:
Chemical such as Ozone or sulfate/nitrate which are transformed in the presence of Sunlight water oxygen or other compound are known as secondary pollutants.
Pollutants are the particle that contaminates the environment in a negative manner.
The chemicals which are not produce directly as a pollutant but are transformed in the presence of Sunlight water oxygen and other compound are known as secondary pollutants.
chemicals like Ozone, sulfate/nitrate are called secondary because they are not present directly as a pollutant but there converted into pollutant because of the certain conditions.
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how does the density of air in a deep mine compare with the density of air at earth's surface?
The density of air in a deep mine is greater compared with the density of air at the earth's surface.
The pressure exerted on a surface that is perpendicular to all directions and is caused by the weight of the air is referred to as atmospheric pressure. Additionally, as altitude increases, the pressure caused by air reduces because there is less air above an elevated position. This is because there is less air above an elevated place. In addition, the air is thinner at higher elevations because less dense gases can be found there since they float over denser gases. This causes the air to be thinner at higher elevations.
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. absorbance readings of four prepared tubes with various solutions over a 6060-minute period. question which of the following best justifies the use of tube 22 as a control treatment? responses it was a negative control for the accuracy of the spectrophotometer, ensuring that an accurate reading for treatment cuvette 22 would be made. it was a negative control for the accuracy of the spectrophotometer, ensuring that an accurate reading for treatment cuvette 2 would be made. it was a negative control for the chemical stability of the chlorophyll suspension, ensuring that changes in absorbance could only be attributed to changes in chlorophyll content. it was a negative control for the chemical stability of the chlorophyll suspension, ensuring that changes in absorbance could only be attributed to changes in chlorophyll content. it was a positive control for the change in dcpipdcpip color associated with changes in light intensity. it was a positive control for the change in d c p i p color associated with changes in light intensity. it was a positive control for measuring the effect of dcmudcmu on the reaction.
The use of tube 22 as a control treatment best justifies that it was a positive control for measuring the effect of DCMU on the reaction.
DCMU acts as an inhibitor to the movement of electrons within the light reaction of photosynthesis. The major role of control tube is to reduce the variability due to unwanted/unknown factors of the experiment. Controls are used to make sure that test results are not positive or negative due to some unknown factor. A control group is used to establish causality by isolating the effect of an independent variable. Here, researchers change the independent variable in the treatment group and keep it constant in the control group. Then they compare the results of these groups.
Thus, the best use is that it was a positive control for measuring the effect of DCMU on the reaction.
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the crystal field splitting energy depends on the structure of the complex. group of answer choices true false
The crystal field splitting energy depends on the structure of the complex is a correct statement.
The energy difference between ligand d orbitals is what causes crystal field splitting. The capital Greek letter is used to represent the crystal field splitting number. The difference in color between two related metal-ligand complexes is explained by crystal field splitting, increases down a group on the periodic table and tends to rise with oxidation number. The propensity of transition metals to form complexes is one of their key characteristics. A complex can be thought of as having several ligands encircling a central metal atom or ion. Crystal field theory governs how these ligands interact with the main metal atom or ion. The interaction between a metal ion and ligand is regarded by the 1929-founded crystal field theory as purely an electrostatic phenomenon.
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what would happen if you used equal masses of all the compounds? for example, 2.00 g as opposed to equal moles of each compound?
a. equal masses would produce different amounts of CO2
b. equal masses would produce the same amount of CO2
c. equal masses would show extreme variation and be difficult to measure in the lab
option c - equal masses would show extreme variation and be difficult to measure in the lab if you used equal masses of all the compounds.
Equal masses would imply a different number of moles. And reactions are molecular in nature. A reaction between 1 mole of A and 1 mole of B, for example, produces 1 mole of C. However, because their molar masses are likely to differ, we cannot apply the same mass formula and expect the same result. Consider the reaction HCl + NaOH, which produces NaCl + H2O. This reaction demonstrates that 1 mole of hydrochloric acid and 1 mole of NaOH produces 1 mole of NaCl and 1 mole of water. However, the reaction is very different in terms of mass because each of the reactants has a different molar mass.
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a balloon is filled and sealed with air at sea level. if the balloon is taken to a city at 12,000 ft above sea level, what could be the result
As long as the temperature and amount of gas inside the balloon remain constant, the balloon will expand in volume as it flies above sea level.
When a balloon is at sea level, what happens to it?The lower pressure in the upper atmosphere, caused by the lower pressure in the upper atmosphere's upper atmosphere, permits the balloon to expand since there is less material pushing back on it.
Does the balloon's volume change, stay the same, or become larger or smaller?As the internal and external pressures become equal, the inside gas of the balloon expands because the atmospheric gas places less pressure on the balloon's surface.
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1
2
18 6
In an experiment, a student found the percent by mass of water in a sample of BaCl₂ + 2H₂O to be 17.4%. If the accepted value is 14.8%, the percent error in
the student's result is equal to
3.
26
17.4
x100
26
14.8
-x100
14.8
17.4
x100
17.4
14.8
x100
K
[8]
Submit Answer
B
1
Calculator
Ruler
9592
Protractor
Listen
The percent error in the student's result is equal to 17.57 %.
How to calculate the percent error?Percent error can be described as the difference between the estimated value and the actual value in comparison to the actual value and is represented as a percentage. In other words, the percentage error can be defined as the relative error multiplied by 100.
The mathematical formula for percent error can be defined as:
P.E. = (|Estimated value - Actual value|/ Actual value) × 100
[tex]\displaystyle \delta = \left| \frac{v_A - v_E}{v_A} \right| \cdot 100\%[/tex]
Given, the estimated value = 17.4
The actual value = 14.8
[tex]\displaystyle \delta \% = \left| \frac{14.8 - 17.6}{14.8} \right| \cdot 100\%[/tex]
Percent error = 17.57 %
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What is the wavelength of electromagnetic radiation that has a Frequency of 5.65x 10¹11/s or hertz?
m
The wavelength of an electromagnetic radiation that has a frequency of 5.65 x 10¹¹ hertz is 5.31 × 10-⁴m.
How to calculate wavelength?Wavelength is the length of a single cycle of a wave, as measured by the distance between one peak or trough of a wave and the next.
Wavelength is often designated in physics as λ, and corresponds to the velocity of the wave divided by its frequency as follows:
λ = v/f
According to this question, a wave has a frequency of 5.65 × 10¹¹ Hertz, the wavelength can be calculated as follows:
λ = 3 × 10⁸m/s ÷ 5.65 × 10¹¹ Hertz
λ = 5.31 × 10-⁴m
Therefore, 5.31 × 10-⁴m is the wavelength of the wave.
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a solution contains 0.1m f-(aq), cl-(aq), and br-(aq). lead (ii) ion is added to the solution. what is the maximum concentration of lead (ii) ion that will allow only one precipitate to form? [the ksp of pbf2 is 4.1 x 10-8; of pbcl2 is 2.4 x 10-4; and of pbbr2 is 2.1 x 10-6.]
The maximum concentration of lead (II) ion that will allow only one precipitate to form in a solution containing 0.1m of F-, Cl-, and Br- is 4.1 x 10-8M. At this concentration, only the lead-fluoride compound (PbF2) will form a precipitate.
Lead (II) ion is a metal cation that can form multiple compounds with anions such as fluoride (F-), chloride (Cl-), and bromide (Br-). If lead (II) ion is added to a solution containing 0.1m of each of F-, Cl-, and Br-, the maximum concentration of lead (II) ion that will allow only one precipitate to form will depend on the solubility product (Ksp) of the various lead compounds that may form.
The Ksp of the lead-fluoride compound (PbF2) is 4.1 x 10-8, the Ksp of the lead-chloride compound (PbCl2) is 2.4 x 10-4, and the Ksp of the lead-bromide compound (PbBr2) is 2.1 x 10-6. To determine the maximum concentration of lead (II) ion that will allow only one precipitate to form, we need to compare the Ksp values of the three lead compounds.
Since the Ksp of PbF2 is significantly lower than the Ksp of PbCl2 and PbBr2, the maximum concentration of lead (II) ion that will allow only one precipitate to form will be the Ksp of PbF2, or 4.1 x 10-8M. At this concentration of lead (II) ion, the PbF2 compound will be the first to form a precipitate, whilst the PbCl2 and PbBr2 compounds will remain in solution.
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The ionic compound containing ammonium ion and carbonate ion gives off the odor of ammonia, a property put to use in smelling salts for reviving someone who has fainted.
a. True
b. False
True, The ionic combination of ammonium ion as well as carbonate ion emits an ammonia-like scent, which is used in smelling salts to revive fainting people.
The ionic compound with the formula (NH4)2CO3 emits the scent of ammonia and is used in smelling salts to revive fainting people since it contains the ammonium ion & carbonate ion.
To avoid or treat fainting, use aromatic ammonia spirit. An uncomfortable or stressful incident, a medication, or a significant medical condition like heart disease can all contribute to fainting.
Syncope, often known as fainting, is a loss of awareness brought on by a vagal reflex-induced slowing of the heart rate.
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Which choice is not true of a liquid in a glass capillary with a convex meniscus?The liquid has strong cohesive forces.The liquid level will be lower inside the capillary when a capillary is inserted into a bowl of the liquid.The liquid will have a convex meniscus as it moves in the capillary.The behavior of the liquid is driven by strong interactions with the capillary glass.
The decision is not valid for a fluid in what seems like a glass capillary with the a convex meniscus since the liquid's behavior is strongly influenced by its interactions with the glass.
A glass capillary is what?Glass capillaries have external sizes that range greatly, from 0.1 mm to 2.0 mm. For the purpose of gathering x-ray data, they are designed to mount, maintain, and retain biological polymeric crystals as well as small molecules. Capillaries can be used for both research on crystal development and measures of crystal thickness.
What uses do glass capillary tubes have?Glass capillary tubes are used to collect blood in a variety of healthcare settings, including clinics, personal hospices, physicians' offices, blood donation centers, and blood testing facilities.
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calculate the mass defect in fe-56 if the mass of an fe-56 nucleus is 55.921 amu. the mass of a proton is 1.00728 amu and the mass of a neutron is 1.008665 amu, and the mass of an electron in 0.00055 amu
The mass defect in Fe-56 is equal to 0.52823 amu.
What is Mass Defect?The mass defect can be defined as the difference between the actual atomic mass and the theoretical mass calculated by addition of the mass of protons and neutrons in the nucleus.
The actual atomic mass is always less than the predicted mass determined by adding the masses of nucleons. This additional mass is due to the binding energy that is released when a nucleus is formed.
[tex]\triangle M = (Zm_p + Nm_n) - M_A[/tex]
Given the mass of the proton = 1.00728 amu
The given mass of a neutron = 1.008665 amu
The given mass of an electron = [tex]0.00055 amu[/tex]
The mass of an Fe-56 nucleus = 55.921 amu
The mass defect for Fe-56 can be calculated as:
[tex]\triangle M = (26\times 1.00728 + 30 \times 1.008665) - 55.921[/tex]
ΔM = 0.52823 amu
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how many ml of 0.150 m ca(oh)2(aq) will be required to completely react with 150. ml of 0. 100 m h3po4(aq) solution.
4.86 ml are required to fully react with 11.73 ml of 1.006 m ca(oh)2 in order to complete the reaction.
provided information to be calculated:
Using Ca3(PO4)2 (s) + 6H2O, one can calculate: 2H3PO4 + 3Ca(OH)2 (aq)
cal mols
7.33 moles of H3PO4 in a volume of 1 ml are needed to replace the 2 existing H3PO4; 7.33/1.508 = 4.86.
How do moles respond to a volume increase?
An increase in volume advantages the direction that produces more moles of gas, and because there are more moles of products in this situation, the reaction will move to the right and produce more moles of products.
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the initial concentration of reactant in a first-order reaction is 0.27 m and has a rate constant of 0.75 s-1. what is the concentration (mol/l) of reactant after 0.75 s?
After 0.75 s, the reactant's final concentration was 0.0672 mol/L.
Log [Initial concentration] = - rate constant time + log [Initial concentration] has been supplied as the rate reaction for the first-order reaction. [Last-ditch effort]
The reaction described has:
0.27 M for the first concentration
0.75 s/rate constant
Time = 0.75 s
One can provide the ultimate concentration by:
log [0.27] = - 0.75 *0.75 + log [Final concentration]
log [0.27]=-0.5625+log [Final concentration]
log [0.27] + 0.5625 = log [Final concentration]
log [Final Concentration]=1.31+0.5625
log [Final concentration] = 1.8725
Final concentration: 0.0672 mol/L
After 0.75s, the reactant's final concentration was 0.0672 mol/L.
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the reaction c6h12o6(s) + 6 o2(g) → 6 co2(g) + 6 h2o(l) is best classified as a(n)
The reaction [tex]C_{6} H_{12} O_{6} (aq) + 6O_{2} (g)[/tex] → [tex]6CO_{2} (g) + 6H_{2} O(l)[/tex] is best classified as an exothermic reaction.
Chemical reaction is a process in which the reactants react chemically and change into products through chemical transformation. For example, respiration - we breathe in oxygen, which reacts with glucose to produce carbon dioxide, water and energy.
A decomposition reaction breaks a molecule or compound into two or more simple new chemical substances. For example, the electrolysis of water. In a conjugation reaction, two or more molecules combine chemically to form a new substance (compound). Binding and decomposition reactions are opposites. For example, the combustion of a strip of magnesium (or magnesium) produces a gray-black ash consisting of magnesium oxide.
Combustion reactions are generally exothermic reactions that release energy in the form of heat. It's a reaction between a fuel and an oxidant (usually atmospheric oxygen) that usually produces smoke, water, and heat. In a neutralization reaction, acids and bases react to form salts and water. A chemical reaction in which oxidation and reduction occur simultaneously is called a redox reaction. Oxidation is the addition of oxygen and reduction is the addition of hydrogen (or removal of oxygen).
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In a particular solution, the concentration of several ions is measured. The solution is found to have a high concentration of
Hydronium ions (H3O*), and a low concentration of Hydroxyl (OH) ions. The pH of the solution is most likely which of the
following?
02
07
08
O12
Answer:
02
Explanation:
Hydronium is acidic, so the PH would have to be acidic
given the balanced equation: 2 n2h4(l) n2o4(l) 3 n2(g) 4 h2o(g) a) how many grams of dinitrogen tetrahydride are required to produce 57 moles of nitrogen?
Dinitrogen tetrahydride must be converted into 38 moles [tex]N_2H_4[/tex] in order to yield 57 moles of nitrogen.
[tex]x molN_2H_4= 57mol N_2(\frac{2 molN_2O_4}{3 molN_2} )\\x molN_2H_4= 19*2 molN_2H_4\\x mol N_2H_4= 38 mol N_2H_4[/tex]
Dinitrogen tetroxide is the chemical molecule N2O4, also known as nitrogen tetroxide (NTO) and occasionally amyl (typically among ex-USSR/Russian rocket engineers). It is a helpful reagent in the synthesis of chemicals. It and nitrogen dioxide combine to form an equilibrium combination. It has a 92.011 g/mol molar mass.
Dinitrogen tetroxide is a potent oxidizer that spontaneously reacts when it comes into touch with different types of hydrazine, making the two a popular bipropellant for rockets.
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which diol is produced by treatment of trans-2-butene with osmium tetroxide followed by workup with aqueous sodium bisulfite?
The (2R,3R)-(-)-2,3-Butanediol is the diol is produced by treatment of trans-2-butene with osmium tetroxide followed by workup with aqueous sodium bisulfite.
It is used as a chiral auxiliary, chiral ligand and constructing block. Cyclocondenses with ketones for (13)C NMR willpower of optical purity. It is used withinside the decision of carbonyl compounds in fueloline chromatography. Fully miscible in water (2R,3R)-2,3-butanediol.
Alkene oxidation with OsO4 accompanied through sodium bisulfite paintings up consequences withinside the syn addition of hydroxyl corporations. For trans-2-butene, the 2 hydroxyl corporations may want to similarly upload at the pinnacle face or backside face.
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What is the wet bulb temperature if the dry bulb is 26 °C and the relative humidity is 77%?
The wet bulb temperature if the dry bulb is 26 °C and the relative humidity is 77% is 16°C.
What is relative humidity ?Relative Humidity (RH) is a ratio of the quantity of atmospheric moisture that is actually present to the amount that would be present if the air were saturated, expressed in percent.
In relation to the maximum amount of water vapor that the air can hold at a specific temperature. A value of 50% relative humidity, for instance, indicates that there is only 50% as much water vapor present as there would be if the air were saturated at that temperature.
Td = T - ( 100 - RH ) ÷ 5.)
where, Td is dew point temperature, T is observed temperature, and RH is relative humidity.
by using the above formula
Td=26 - ( 100 - 50 ) ÷ 5
=26 - 50 ÷ 5
=26-10
Td = 16°C
Thus, The wet bulb temperature if the dry bulb is 26 °C and the relative humidity is 77% is 16°C.
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2. a) use the ph scale to describe an acidic solution and a basic solution. 2. b) at what ph would a solution be considered neutral? why?
a. The pH scale on a solution that describes acidity is less than 7, and alkaline is more than 7.
b. The solution is considered neutral when the pH is 7
pH a is the degree of acidity or alkalinity of a solution from the value of the concentration of hydrogen and hydroxyl ions in it.
A solution is said to have an acidic pH if it has a pH of less than 7. The lower the pH of a solution, the more acidic the solution is. While a solution is said to be alkaline if it has a pH of more than 7. The higher the pH value of the solution, the more alkaline the solution is.
A solution is said to have a neutral pH if the value is 7. A pH value of 7 is said to be neutral because in pure water dissolved H+ ions and dissolved OH- ions are in the same amount.
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the heat of vaporization of water at 100°c is 40.66 kj/mol. calculate the quantity of heat that is absorbed/released when 7.00 g of steam condenses to liquid water at 100°c.
the heat of vaporization of water at 100°c is 40.66 kj/mol, Heat of vaporisation (HV) = q/m = 40.66 kJ/mol, quantity of heat is = 20.33 kjoules
q is heat absorbed or released , m is mass = 9 g, no. of moles of water = mass/mol wt = 9/18 = 0.5 moles, HV x m = q, uantity of heat is = 40.66 x 0.5 = 20.33 kjoule. The enthalpy of vaporisation, also known as the heat of vaporisation or heat of evaporation, is the amount of energy required to convert a liquid substance into a gas. The enthalpy of vaporisation depends on the pressure at which the transformation occurs. The heat of vaporisation is defined as the amount of heat required to convert 1g of a liquid into a vapour without causing the liquid's temperature to rise. Boiling refers to vaporisation at the boiling point. A boiling liquid's temperature remains constant until all of the liquid has been converted to a gas.
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what volume (ml) of 0.1750 m naoh (aq) is needed to react completely with 25.00 ml of 0.1150 m h2so4 (aq).
The volume (ml) of 0.1750 m naoh (aq) is needed to react completely with 25.00 ml of 0.1150 m h2so4 (aq). is 31.08ml.
Calculation:-
M₁ v₁ n+₁ = M₂ V₂ n+₂
0.1850 x v₁ X₁ = 0.1150 x 25X²
V₁ = 0.1150 × 25 x 2/ 0.1850
= 31.081 ml
Volume is defined as the space occupied within the bounds of an object in three-dimensional space. Also called the capacity of the object. Volume is a measure of her occupied three-dimensional space. Often quantified numerically using SI units or by various imperial or US customary units. The definition of length is related to volume. quantified numerically using SI units or by various imperial spaces.
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a sodium cation is than a sodium atom. a phosphorus anion is than a phosphorus atom. a magnesium ion is than a sodium ion. a chlorine ion is than a phosphorus ion. a potassium ion is than a sodium ion.
The following conclusions can be drawn from using the periodic table to compare the sizes of ionic radii to the equivalent atomic radii or other ionic radii.
Compared to sodium atoms, sodium cations are smaller.An anion of phosphorus is bigger than an atom of phosphorus.Compared to sodium ions, magnesium ions are smaller.In comparison to phosphorus, chlorine is a smaller ion.Compared to sodium ions, potassium ions are bigger.The nuclear pull is greater for the magnesium atom since it has a higher atomic number than sodium but the same number of shells. Its size is therefore smaller than sodium's. When an electron is added to an atom to form an anion, the new electron repels other electrons, increasing the size of the ion. This is why phosphorus ions are larger than phosphorus atoms.
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