(i) The colliding molecules should have energy equal to or greater than activation energy.
(ii) The colliding molecules should have proper orientation.
If the colliding reactant molecules have energy less than activation energy, then the collision will NOT be an effective collision
What is energy?
Scientists find energy as the ability to do work. Modern civilization is possible because humans have learned to change energy from one form to another and then use it to do work.To know more about energy, click the link given below:
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(a) The two factors that determine whether an effective collision between molecules of A and B results in a reaction are the energy of the collision and the orientation of the molecules in the collision.
What is collision?
Collision is an event in which two or more objects or particles come into contact with each other. Collisions occur in everyday life and are a fundamental part of physics. Collisions can be elastic or inelastic, depending on the energy of the objects involved.
(b) A decrease in temperature would decrease the rate of the reaction shown above because it would decrease the average kinetic energy of the molecules.
(c) The rate law expression that would result if the reaction proceeded by the mechanism shown below A+B → [AB] (fast) [AB] + 8C+D (slow) is: Rate = k[A][B].
(d) A catalyst increases the rate of a reaction by lowering the activation energy barrier, making it easier for the molecules to react. However, the catalyst does not change the value of the equilibrium constant for that reaction because it does not affect the thermodynamic properties of the reaction.
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Enthalpy of solution for MgSO4(s) and MgSO47H2O (s) are -20.3kcal and 4.8kcal. Calculate hydration enthalpy of MgSO4
[tex]$$\mathrm{MgSO}_{4(\mathrm{~s})} \stackrel{\Delta \mathrm{H}_{\mathrm{s}_1}}{\longrightarrow} \mathrm{MgSO}_4 \cdot 7 \mathrm{MH}_2^{+2} \mathrm{O}+\mathrm{SO}_{4(\mathrm{aq})}^{2-}$$$\\\therefore \quad \Delta \mathrm{H}_{\mathrm{s}_1}=\Delta\\\mathrm{H}_{\mathrm{Hyd}}+\Delta\mathrm{H}_{\mathrm{s}_2}$$\\\therefore \quad-20.3=\Delta \mathrm{H}_{\mathrm{Hyd}}+4.8$$\\\therefore \quad \Delta \mathrm{H}_{\mathrm{Hyd}}=-25.1 \mathrm{kcal} / \mathrm{mole}$[/tex]
The change in enthalpy that occurs when one mole of a gaseous ion dissolves in enough water to generate an infinitely diluted solution under a typical environment of 1 bar pressure is known as the hydration enthalpy (HHyd) (infinite dilution means a further addition of solute will not cause any heat change).
Enthalpy of hydration can be defined as the quantity of energy released upon dilution of one mole of gaseous ions in simple terms. With water acting as the solvent, it can be compared to the enthalpy of solvation. Also known as hydration energy, enthalpy of hydration has a constant negative value.
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which are true about lubricants for cutting? they are composed almost entirely of hydrocarbons with some additives. they should be used at lower cutting speeds than other types of cutting fluids. they make cutting surfaces smoother. they dissolve easily in water they make it easier for cutting chips to not to stick to the cutting tool. they reduce the temperature of the cutting tool, but not as much as other cutting fluids.
A lubricant must keep its properties in the presence of additives and other items. Lubricating oil colours are more of a test for a grade or brand of oil's consistency than they are for its attributes. Thus, option B is correct.
What are the characteristics of lubricants?There are four different kinds of liquid lubricants. Mineral oil a. It is a material made from petroleum. These oils are stable at high temperatures because they have a high paraffine and naphthanic content.
Examples include steam cylinder oil, wire rope oil, refrigeration grade oil, gear oil, machine or engine oil, and circulating oil.
Therefore, they should be used at lower cutting speeds than other types of cutting fluids. They make cutting surfaces smoother.
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What is the Index Value for an exposure of low?
The concept is to provide diagnostic images using the optimal amount of radiation. If the index is too low, it may indicate poor image quality. If the dose index is too high, it may mean using more radiation than is needed for imaging.
Various Kinds of Index NumbersThere are three kinds of index numbers, namely:
a. Price index figures, namely comparative figures to measure price changes from one period to another.
b. Number index (quantity), which is a comparison number to measure changes in the amount from one period to another.
c. Value index number, which is a comparison number to measure changes in value from one period to another. Value is calculated by multiplying the price by the amount (quantity).
Your question is incomplete but most probably your full question was:
Explain. What is the Index Value for an exposure of low?
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in the structure shown below, how many lone pairs of electrons does the nitrogen atom bear? (enter an.swer as a number.)
The nitrogen atom in the diagram has three lone pairs of electrons. The nitrogen atom in the structure has three lone pairs, or non-bonding electrons. Lone pairs are electron pairs.
in a molecule that do not form bonds with other atoms. Nitrogen, for example, contains five valence electrons and may create up to three covalent bonds. The nitrogen atom in the diagram has three lone pairs of electrons. The nitrogen atom in the structure has three lone pairs, or non-bonding electrons. Lone pairs are electron pairs. When nitrogen makes three bonds, the leftover electrons become non-bonding pairs, resulting in three lone pairs. The amount of lone pairs on an atom is critical for influencing its molecular geometry and reactivity.
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A buffer solution at pH 10 has a ratio of [HA]/[A−] of 10. What is the pKa of the acid?a. 8b. 9c. 10d. 11e. 12
A buffer solution at pH 10 has the ratio of [HA] / [A⁻] of 10.The pKa of the acid is 11.
The pH is as follows :
pH = pka + log [A⁻] / [ HA]
Where
The pH = 10
[A⁻] / [ HA] = 1 / 10
By solving the values , we get :
pH = pka + log [A⁻] / [ HA]
10 = pka + log(1/ 10)
10 = pka + log (0.1 )
10 = pka + (-1 )
10 = pka - 1
pka = 11
The pka value is 11 for the pH of value 10.
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Classify these substances as molecular or ionic. glucose C6H12O6, water H2O, calcium oxide CaO , chlorine Cl2 , silver nitrate AgNO3, potassium chloride, KCI methane CH4, barium sulfate, Baso4, ammonia, NH3 sodium hydroxide, NaOH copper sulfide, Cus
Molecular substances are substances composed of molecules, which are formed by the combination of atoms through covalent bonds.
The classification of the substances as molecular or ionic is as follows:
Molecular: Glucose, Water, Chlorine, Methane, Ammonia, Copper sulfide
Ionic: Calcium oxide, Silver nitrate, Potassium chloride, Barium sulfate, Sodium hydroxide.
In a molecular substance, atoms share electrons to form stable molecular structures. Unlike ionic compounds, where ions are held together by electrostatic forces, molecular substances have atoms held together within a molecule by covalent bonding.
These substances tend to have lower melting and boiling points compared to ionic compounds. This is because the intermolecular forces between molecules, such as van der Waals forces or hydrogen bonding, are weaker than the strong electrostatic forces between ions. Consequently, molecular substances often exist as gases, liquids, or solids with relatively low melting points.
Molecular substances consist of covalently bonded atoms, whereas ionic substances contain ions held together by electrostatic forces.
Therefore, the classification of the substances as molecular or ionic is as follows:
Molecular: Glucose, Water, Chlorine, Methane, Ammonia, Copper sulfide
Ionic: Calcium oxide, Silver nitrate, Potassium chloride, Barium sulfate, Sodium hydroxide.
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when benzene is reacted with hot sulfuric acid or a mixture of so3 in h2so4, which group replaces a ring h?
When benzene is reacted with hot sulfuric acid or a mixture of so3 in h2so4, which group replaces a ring h?
The resulting product is the substitution of one of the hydrogen atoms in the benzene ring with a sulfonic acid group (-SO3H).
This reaction is known as sulfonation, and it results in the formation of a sulfonic acid derivative of benzene.
What is Sulfonation?
Sulfonation is a chemical process in which a sulfonic acid group (-SO3H) is introduced into a molecule. It is typically performed as a reaction between a sulfonic acid anhydride and a substrate molecule. The result of sulfonation is a sulfonated product, which has increased water solubility and improved acidity compared to the original substrate. Sulfonation is commonly used in the synthesis of surfactants, detergents, and other industrial and commercial products.
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why does nh3 displace h20
Cu(NH3)4synthesis 2+ Compared to H2O, NH3 has more lone electron pairs. H2O is a weaker Lewis base than NH3. More quickly than H2O, NH3 may give a single pair of electrons.
Describe three electron-related facts.The outside of the nucleus is surrounded by electrons, which are negatively charged particles. Scientists may have trouble observing them since they rotate so quickly.
What does an electron example actually mean?The electron is the tiniest atom-forming particle or a carrier of the a negative charge. Protons and electrons are both present in equal numbers in a neutral atom. For example, the hydrogen atom only has one proton and one electron. The uranium atom was unique due to its 92 protons & 92 electrons.
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why does temperature affect voltage in a galvanic cell
It was predicted based on the Nernst equation experiment that the temperature would rise while the voltage generated by the electrolytic cell would drop.
What can you infer from the Nernst equation?The relationship between the ion concentrations on each side of a membrane that is completely selective for just that ion and the dc voltage (voltage) that will be recorded across that membranes under adaptation options is defined by this equation.
Simply put, what does the Nernst equation mean?The reduction potential of an atom or ion, as measured at any circumstances, may be equated with the reduction potential as measured under realistic conditions of 298K but one molar or one air pressure using the Nernst equation.
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Name the following covalent compound: CCl3
monocarbon trichloride
carbon chloride
carbon trichloride
tricarbon monochloride
Answer:
The name for CCl3 is carbon tetrachloride.
What process converts glucose to lactic acid?
Fermentation is the process by which glucose converts to lactic acid. It occurs under anaerobic condition. Lactate dehydrogenase is the enzyme responsible for it.
Cellular respiration known as anaerobic respiration takes place when oxygen is not present. Lactic acid fermentation and alcoholic fermentation are the two kinds of anaerobic respiration. Some bacteria convert pyruvic acid into lactic acid. Animal muscle cells exhibit this metabolic mechanism as well. During physical activity, muscle cells' oxygen supply for respiration may not be sufficient. Pyruvic acid is converted to lactic acid under anaerobic circumstances. When lactate dehydrogenase is present, this takes place. Additionally, an antioxidant like NADH+H+ is reoxidized to NAD+.
A significant portion of the energy is not released throughout the fermentation process. Less than 7% of the glucose's energy is released in this situation. Additionally, not all of it is included in ATP's high energy bonds.
Fermentation process:
In the breakdown of the glucose or 6-carbon molecule, glyceraldehyde 3-phosphate and 3-phosphoglyceric acid are produced.
NAD+ undergoes this transformation into NADH+H+.
When combined with 3-phosphoglyceric acid, phosphoenol pyruvic acid eventually yields pyruvic acid.
In this procedure, net 2 ATP molecules are produced (glycolysis).
NADH+H+, a reducing agent that reduces pyruvic acid to lactic acid and then reoxidizes to NAD+, aids in this process.
Two pyruvate/pyruvic acid molecules are converted into two lactate/lactic acid molecules through this procedure. The enzyme lactate dehydrogenase is present throughout this process.
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__________ is formed when hydrogen is oxidised during combustion. What one word completes the sentence?
When hydrogen atoms are present in a fuel, they are oxidised to water.
The combustion reactions are commonly exothermic redox reactions between an oxidant and a fuel. When hydrogen is oxidized during combustion it forms water.
What is combustion?A chemical reaction in which a fuel undergoes oxidation by reacting with an oxidizing agent which results in the release of energy generally in the form of heat is called the combustion. The product formed as a result of the combustion is usually an oxidized fuel.
It is not unfamiliar that the combustion reactions are accompanied by the flames. It is very important to note that not all combustion reactions result in fires. The complete combustion reactions can sometimes referred to as clean combustion reactions.
The combustion reaction of hydrogen is given as:
2H₂ + O₂ → 2H₂O
When hydrogen is oxidized, it results in the formation of water. When hydrogen atoms are present in a fuel, they are oxidized to water.
Thus water is formed when hydrogen is oxidized.
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When 1-chlorobutane is treated with sodium hydroxide, two products are formed_ Identify the two products: (Select all that apply:) A. 1-butyne B. 1-butanal C. 1-butene D. 2-butanol E. 2-butene F. 1-butanol
When the 1-chlorobutane is treated with sodium hydroxide, two products are formed are the correct option is C. 1 - butene F. 1 - butanol.
When 1-chlorobutane is treated with sodium hydroxide, The reaction is as follows :
1) The substitution reaction take place :
Cl - CH₂ - CH₂ - CH₂ - CH₃ + NaOH ----> OH - CH₂ - CH₂ - CH₂ - CH₃
1-chlorobutane sodium hydroxide 1 - butanol
2) The elimination reaction take place :
Cl - CH₂ - CH₂ - CH₂ - CH₃ + NaOH ----> CH = CH - CH₂ - CH₃
1-chlorobutane sodium hydroxide 1-butene
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The following cation has a total of how many resonance structures?A.4. B.2 C.5 D.3
The following cation chlorobenzene having a 5 resonating structures.
Resonance structure: These are the group of the two or more Lewis structures which collectively represent a single polyatomic species ' electronic bonding including fractional bonds as well as fractional charges.
Chlorobenzene is an aromatic organic compound having chemical formula C6H5Cl. This colorless, flammable liquid is a common solvent and it is widely used as an intermediate in the manufacture of other chemicals.
In chlorobenzene, the lone pair present in the chlorine atom shows the resonance with the benzene ring which gives result in an increase in the electron density on the benzene ring which is followed by an increase in its reactivity towards the electrophiles.
--The given question is incomplete, the complete question is
"How many resonance structures are possible in chlorobenzene?A.4. B.2 C.5 D.3"--
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why is a crystal of pure calcium carbonate made in a lab not a sample of the mineral's calcite?
Explanation:
It didn't form naturally and the carbonate calcium was found in caves.The boxes below represent areas filled with the same gas at two different temperatures. T= 18°C T = 45°C a. Draw a model of particles of the gas in each box. Then draw arrows to indicate the velocities of the particles. (1 point) b. Write two or three sentences relating the temperature, the average kinetic energy, and the motion of the particles. (2 points)
The average velocity of the gas on 18° C is [tex]\sqrt{\frac{8 \ R \ 18}{\pi \ M} }[/tex].
The average velocity of the gas on 45° C is [tex]\sqrt{\frac{8 \ R \ 45}{\pi \ M} }[/tex]
The average velocity of gas = [tex]\sqrt{\frac{8 \ RT}{\pi \ M} }[/tex]
R= gas constant
M= molecular mass of gas
T= temperature
Average Kinetic energy increases with the temperature. The velocity of the molecules also increases. Different molecules are moving with different speeds so we take the average of the motion of particles.
Average Kinetic energy = [tex]\frac{3}{2} K \ T[/tex]
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Whats the answer for this question
In other words, the total number of a particular atom is the product of its subscript (s) and the coefficient of the chemical formula of the compound.
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a student uses a graduated cylinder and a balance to determine the density of ethanol in three trials. the data from this process are shown below. the actual density of ethanol is 0.789 g/ml.
The average of the three trials is 0.791 g/ml, which is close to the actual density of ethanol (0.789 g/ml).
What is the ethanol ?Ethanol is an organic chemical compound, also known as ethyl alcohol, that is found in alcoholic beverages and has many uses in industry. It is produced by the fermentation of sugar and starches, such as corn and wheat, and is often used as an additive in gasoline. Ethanol has a variety of practical applications, including being used as a solvent, a fuel, an antiseptic and a preservative. It is also used in the manufacture of perfumes, paints, solvents, plastics and pharmaceuticals.
Trial 1: Mass = 42.3 g, Volume = 53.5 ml
Density: 42.3 g / 53.5 ml = 0.791 g/ml
Trial 2: Mass = 42.1 g, Volume = 53.4 ml
Density: 42.1 g / 53.4 ml = 0.790 g/ml
Trial 3: Mass = 42.2 g, Volume = 53.3 ml
Density: 42.2 g / 53.3 ml = 0.792 g/ml
The average of the three trials is 0.791 g/ml, which is close to the actual density of ethanol (0.789 g/ml).
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why does ammonia have a larger henry's law constant
Ammonia has a larger henry's law constant because ammonia has a very strong hydrogen bon-ding with water rather than simple in-ter-molecular forces. It can be measured as 1.62 x 10-5 atm/mole.
Henry's law constant: Higher the value of henry's law constant, the lower will be the solubility of the gas. It can be explained by using the equation of the Henry's Law standard state of the binary mixture is where the activity of the solute is related with the mole fraction.
Ammonia is a colorless gas having a sharp suffocating o-dor. It dissolves easily in water to form a ammonium hydroxide solution which can cause irr-itation and burns. Ammonia gas will be easily compressed and it forms a clear, colorless liquid under pressure.
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what is the total volume of the CO2(g) and H2O(g) at 600 degree Celsius and 0.888 atm produced by the combustion of 1.00L of C2H6(g) measured at STP.
The total volume of CO2(g) and H2O(g) produced by the combustion of 1.00L of C2H6(g) at 600 degree Celsius and 0.888 atm is approximately 2.86 L measured at STP.
The combustion of C2H6(g) is a chemical reaction in which the hydrocarbon (C2H6) reacts with oxygen to produce CO2(g) and H2O(g) as the main products. The balanced equation for this reaction is:
C2H6(g) + 7/2 O2(g) -> 2 CO2(g) + 3 H2O(g)
According to the ideal gas law (PV = nRT), the volume of a gas is proportional to its temperature and pressure. Therefore, to find the total volume of CO2(g) and H2O(g) produced at 600 degree Celsius and 0.888 atm, we need to convert these conditions to the standard temperature and pressure (STP), which is defined as 0 degree Celsius and 1 atm.
First, we calculate the number of moles of C2H6(g) consumed in the reaction by using the Ideal Gas Law:
PV = nRT
Where:
P = 0.888 atm
V = 1.00 L
R = 8.31 J/mol*K
T = (600 + 273) K
n = (PV)/(RT) = (0.888 * 1.00)/(8.31 * (600 + 273)) = 0.0257 moles
Next, we use the mole ratios from the balanced chemical equation to find the number of moles of CO2(g) and H2O(g) produced:
n(CO2) = 2 * 0.0257 = 0.0514 moles
n(H2O) = 3 * 0.0257 = 0.0771 moles
Finally, we use the Ideal Gas Law to find the volume of CO2(g) and H2O(g) at STP:
V = nRT/P
Where:
P = 1 atm
T = 273 K
V(CO2) = n(CO2) * R * T/P = 0.0514 * 8.31 * 273/1 = 12.06 L
V(H2O) = n(H2O) * R * T/P = 0.0771 * 8.31 * 273/1 = 17.80 L
The total volume of CO2(g) and H2O(g) is the sum of their individual volumes, which is approximately 2.86 L.
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How, many stereoisomers of the 2, .3-dimethylbutane are possible?
4
None 2 3
The 2,3-dimethylbutane structure is as follows: There are no chiral centers in the specified structure. Additionally, the supplied molecule has a plane of symmetry that often eliminates stereoisomerism. As a result, there are no stereoisomers.
In contrast to atomic connection, stereoisomers differ in the spatial arrangement of their atoms. The mirror-image stereoisomers, a non-superimposable pair of two molecules that are mirror images of one another, are one of their most intriguing types of isomers.
What are stereoisomers exactly?
Stereoisomers are isomers with the same composition (i.e., similar parts), but different orientations in space, according to a general description.
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An isentropic process is also: (select all that apply) A.an adiabatic process B.a reversible process C.a process where the change in entropy is zero D.a process where there is no heat added to the system E.a process than can be undone
Additionally, an isentropic process is one that isn't necessarily adiabatic or reversible.
By adiabatic, what do you mean?A process that doesn't contain any temperature distribution is known as an asynchronous machine. This does not imply that the temperature is constant; rather, it indicates that no heat is being introduced into or removed from the system.
What are adiabatic and isothermal processes?When a body is changing its thermodynamic state, an adiabatic process is taking place without any heat being supplied to it. Therefore, the body is adiabatically isolated. An inertial process is a mechanical change in which the body's temperature remains constant.
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On a cold day the atmosphere temperature is reported as 12. 9F what is the temperature in kelvin ? ( please note that the constant 273. 15 is an exact number
On a cold day the atmosphere temperature is reported as 12. 9F. The temperature in kelvin is 262.54 °K.
The thermal energy of a substance or system is measured by its temperature. Temperature measurements are most frequently expressed in Celsius (°C), Fahrenheit (°F), and Kelvin (°K) (K).
A straightforward formula is used to convert between degrees Fahrenheit and Kelvin: K = (y °F - 32) x 5/9 + 273.15. The two most widely used and recognized temperature scales are in degrees Fahrenheit and degrees Kelvin.
°K= (Temperature- 32) x 5/9 + 273.15
°K= (12.9°F − 32) × 5/9 + 273.15 = 262.54 °K.
Therefore, the reported temperature of the atmosphere on a cold day is 12. 9F.The temperature in kelvin is 262.54 °K.
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what percent ( ) of the total calories in your food product is from fat
20-35% of the total calories that are obtained from out food products are from the fats.
The food that we eat is rich in a number of essential nutrients which are required by our body and these include protein, carbohydrates, fats, vitamins, minerals etc. Our body breaks down the complex food in simpler substances in order to produce energy which is necessary to perform the day to day activities in our life.
The major sources of calories in the food are the carbohydrates followed by the fats and proteins. About 45 to 65 percent of the total calories comes from the carbohydrates, 20 to 35 percent comes from the fat, and about 10 to 35 percent of the calories come from protein.
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how much larger is a uranium nucleus compared to an iron nucleus
The larger is a uranium nucleus as compared to an iron nucleus is the radius of the uranium is 7.4 × 10⁻¹⁵ m and the iron is 4.59 × 10⁻¹⁵ m .
The average radius of the nucleus with A nucleons is R = R0 A1^/3,
where ,
R0 = 1.2 × 10⁻¹⁵ m.
A = number of protons + number of nucleons
The Radius = R = R0 A1^/3
The radius of Iron = 56
The Radius = R = 1.2 × 10⁻¹⁵ m (56)¹/³
The Radius = 4.59 × 10⁻¹⁵ m
The Radius of the Uranium = 235
The Radius = R = 1.2 × 10⁻¹⁵ m (235)¹/³
The radius = 7.4 × 10⁻¹⁵ m
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A student studying the decomposition of hydrogen peroxide noticed that the rate at which oxygen gas collected was noticably slower after the reaction had been running for several minutes than it was when the reaction was first started. Select the best answer from the list of statements.
The best answer from the list of statements is: The student noticed that the rate at which oxygen gas collected was noticeably slower after the reaction had been running for several minutes than it was when the reaction was first started.
A chemical reaction is a process in which atoms or molecules interact to form new substances with different chemical properties. During a chemical reaction, bonds between atoms are broken and new bonds are formed to create different molecules. Chemical reactions involve the rearrangement of atoms to form new compounds and release energy in the form of heat, light, or sound. Chemical reactions usually involve the exchange of electrons between atoms, resulting in the formation of new compounds. Chemical reactions are also affected by external factors such as temperature, pressure, and the presence of a catalyst.
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Carbon monoxide (CO) emissions for a certain kind of car vary with mean 2,9g/mi and standard deviation 0.4g/m. A company has 80 of these cars in its fleet. Let -y (the - is supposed to be over y) represent the mean CO level for the company's fleet.a) What's the approximate model for the distribution of -y (the - is supposed to be over the y)? Explain.b) Estimate the probability that -y (he - is supposed to be over the y) is between 3.0 and 3.1g/mi.c) There is only a 5% chance that the fleet's mean CO level is greater what value?
By the help of , standard deviation in first part option c is correct, in second part , [tex]P(1.3125 < \bar{y} < 2.5625)=0.0895[/tex], in third part [tex]\bar{y}=3.9266[/tex]
The standard deviation, a statistic that describes how evenly distributed a dataset is in regard to its mean, is determined by taking the square root of the variance. The standard deviation can be calculated as the square root of variance by computing the deviation of each data point from the mean. The bigger the deviation within the data collection, the further the data points deviate from the mean; hence, the higher the standard deviation, the more dispersed the data.
we have [tex]\mu=3.795[/tex]and [tex]\sigma=0.6.[/tex]
1.) Approximate of y-bar will be normal distribution with mean [tex]\mu_{\bar{y}}=\mu=3.795[/tex].) and standard deviation equal to[tex]\sigma_{\bar{y}}=\sigma/\sqrt{n}=\frac{0.6}{\sqrt{60}}=0.0775[/tex]So option c is correct with fill in blanks equal to 3.795 g/mi and 0.08 g/mi respectively.
2.) Let us find z-score for 3.9 so
[tex]z=\frac{\bar{y}-\mu_{\bar{y}}}{\sigma_{\bar{y}}}=\frac{3.9-3.795}{0.08}=1.3125[/tex]
and z-score for 4 will be
[tex]z=\frac{\bar{y}-\mu_{\bar{y}}}{\sigma_{\bar{y}}}=\frac{4-3.795}{0.08}=2.5625[/tex]
So [tex]P(1.3125 < \bar{y} < 2.5625)=0.0895[/tex]
3.) From z-table, area right to z-score 1.645 is 0.05.So
[tex]1.645=\frac{\bar{y}-3.795}{0.08} \\\\:\bar{y}=3.9266[/tex]
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what is the molarity and osmolarity of a 0.9 nacl solution
Explanation:
a 1M solution of a nonionizing substance such as glucose is a 1 Osmolar solution; a 1M solution of NaCl = 2 Osm; and a 1M solution of Na2SO4 =3 Osm. So in our example, the osmolarity of the 0.9% NaCl solution is 0.15M * 2 = 0.3 Osm.0.9% NaCl solution has a molarity of 154 mmol/L whether the solution volume is 1 dL, 1 L, 1 μL, or an Olympic-size swimming pool! Osmolarity is the ratio of osmole content to total solution volume.
The molarity and osmolarity of a 0.9 NaCL solution is 154 μM and 308 μM respectively.
What is osmolarity?The quantity of solute molecules per litre of solution is known as osmotic concentration, also referred to as osmolarity, and it serves as a measure of solute concentration. In the same way that a solution's molarity is represented by the letter "M," a solution's osmolarity is typically expressed as Osm/L.
Molarity of 0.9% NaCL solution =
0.9% = 9 grams of NaCL in 100 ml of H₂O
Molarity = weight in grams/GMW × v in ml/1000
= [tex]$\frac{9}{58.44} \times \frac{100}{1000}[/tex]
= 0.00154 M
= 0.00154 × 10⁶
= 154 μM
osmolarity of 0.9% NaCL solution =
Multiply molarity by no. of osmoles
In NaCL the osmoles are Na⁺ and CL⁻ = 2
osmolarity = 154 × 2
= 308 μM
Thus, The molarity and osmolarity of a 0.9 NaCL solution is 154 μM and 308 μM respectively.
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Complete question:
1. what is the molarity and osmolarity of a 0.9% NaCl solution that we will be using to dilute the blood. (NaCL molecular weight= 58.44 g/mol)
find the weight of BACL2 in 250cm³solution if given that after addition of 40.0cm³ of 0.102M AGNO3 solution to 30cm³ of the BACL2 solution, back titration of the excess AGNO3 required 20cm³ of 0.098M NH4CNS solution
Answer:
sample containing only BaCl2
and NaCl
is dissolved in 50 mL
of distilled water. Titrating with 0.07916 M
AgNO3
requires 19.46 mL
to reach the end point. What is the weight percent of BaCl2
in the sample? (Molar mass of BaCl2=208.232 gmol−1
and Molar mass of NaCl=58.4425 gmol−1
)
The way I did it was ;
0.1036g of sample contained 266.6745 Molar mass of BaCl2
and NaCl
i.e. 0.1036g of sample= 266.6745 of substance
x g = 208.232 of BaCl2
only
x g=(0.1036*208.232)/266.6745
=0.08089 g
Where 0.08089 g is the mass of BaCl2
present in the sample.
Weight % = (0.08089/0.1036)*100%
= 78%
I don't know if I'm correct.
what is the correct solution to the assignment please?
What is Barium Hydroxide?
Barium hydroxide is a chemical compound with the chemical formula Ba(OH)2
What are compounds ?
A compound is a substance consisting of two or more elements chemically combined in a fixed ratio. They differ from mixtures consisting of two or more substances physically mixed without chemical bonding. Compounds have their own physical and chemical properties that differ from those of individual elements. For example, the compound water (H2O) has different properties (boiling point, density, solubility, etc.) than its components hydrogen (H2) and oxygen (O2).
Compounds are formed by chemical reactions in which atoms of different elements combine to form new substances. The formation of a compound can be represented by a chemical formula that indicates the type and number of atoms in the compound.
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