The solubility product, sp of the salt at the 25 °C, given that only 0.0190 mole of ab₃ is soluble in 1 L of water is 3.52×10⁻⁶
How do i determine the solubility product, sp?First, we shall obtain the molarity of the ab₃ solution. Details below:
Mole of ab₃ = 0.0190 moleVolume = 1 LMolarity of ab₃ = ?Molarity of solution = mole / volume
Molarity of ab₃ = 0.019 / 1
Molarity of ab₃ = 0.019 M
Next, we shall obtain the molarity of a³⁺ and b⁻ in the solution. Details below:
ab₃(s) <=> a³⁺(aq) + 3b⁻(aq)
From the above,
1 moles of ab₃ contains 1 mole of a³⁺ and 3 moles of b⁻
Therefore,
Molarity of a³⁺ = 0.019 × 1 = 0.019 M
Molarity of b⁻ = 0.019 × 3 = 0.057 M
Finally, we can determine the solubility product, sp. This is illustarted below:
Molarity of a³⁺ = 0.019 MMolarity of b⁻ = 0.057 MSolubility product (sp) =?ab₃(s) <=> a³⁺(aq) + 3b⁻(aq)
sp = [a³⁺] × [b⁻]³
= 0.019 × (0.057)³
= 3.52×10⁻⁶
Thus, the solubility product, sp is 3.52×10⁻⁶
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Devise a synthetic sequence for the synthesis of 2,2‑dibromobutane using the list of reagents available. Select the best reagent for each step
The best reagent for each step is NaNH2, NH2 and CH3I, and HBr.
First of all in the presence of strong base ammonia, we het the clcylated product chain elongation gives but-2-ene followed by bromination gives 2-dibromobutane.
Alkyne using NH3 gets converted into Elongated chain alkyne followed by Hbr.
The reaction of bromine with (E)-stilbene is a classic reaction performed as an example of an electrophilic addition reaction of alkenes. The reaction is stereospecific through an anti addition to the double bond. The traditional reaction uses a bromine solution in methylene chloride, which has very high toxcity.
This bromination reaction demonstrates the stereochemistry of the electrophilic addition of bromine to an alkene. The bromine in this greener approach is generated in situ and eliminates the use of methylene chloride.
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what is a lone pair
Answer:
A lone pair is a pair of electrons occupying an orbital in an atom or molecule and not directly involved in bonding.
Explanation:
Answer:
A pair of electrons that is not used in bonding
Explanation:
I took the test
Which member of the alkali metals has the highest electronegativity?
A) Rb
B) Na
C) Fr
D) Cs
E) Li
F) K
Lithium alkali metals has the highest electronegativity. An atom's ability to attract the electrons of a bond grows with electronegativity, a feature of an atom.
The electrons in a covalent bond are shared evenly by two bound atoms if their electronegativity levels are the same. Typically, the more electronegative atom attracts the electrons in a chemical bond more so than the other one. Consequently, a polar covalent bond is created. The electrons aren't shared at all if the electronegativity values are significantly dissimilar. Ionic bonds are created when one atom essentially steals the other atom's bond electrons.
Over a period, electronegativity often increases as it moves from left to right. The noble gases frequently defy this rule.
Moving down on the periodic table often results in a decrease in electronegativity.
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Using the balanced equation given below, calculate the number of moles of CaBr2 produced in the reaction of 5.0 moles of AlBr3. ____ moles CaBr2
*your answer should be written as X.X
2AlBr3 + 3CaO —> Al2O3 + 3CaBr2
Answer:
7.5 moles of CaBr2 are produced
Explanation:
Based on the equation:
2AlBr3 + 3CaO → Al2O3 + 3CaBr2
2 moles of AlBr3 produce 3 moles of CaBr2 if CaO is in excess.
Using this ratio: 2 moles AlBr3 / 3 moles CaBr2. 5 moles of AlBr3 produce:
5 moles AlBr3 * (3 moles CaBr2 / 2 moles AlBr3) =
7.5 moles of CaBr2 are produced
13. An organic compound is found to contain 77.42% of C, 7.53% of H and
nitrogen. The mass of 1.12L of its vapour at NTP is 4.65g. Determine
the
empirical and molecular formula of the compound.
Answer
7.53% 97% if you divide it you can get the answer
Explanation:
if you increase the concentration of an base, what changes in both types of bases?
Answer: Increasing the concentration of a base will cause the pH level of the solution to increase. Increasing the concentration of an acid will cause the pH level of the solution to decrease.
Explanation:
In question 19, we said intermolecular forces would cause pressure to be than predicted. is this observed in model 3? - 30326012.
Yes, the observation that intermolecular forces cause pressure to be lower than predicted is observed in Model 3.
The graph in Model 3 shows that the actual pressure is lower than the predicted pressure, indicating that intermolecular forces are at play. This phenomenon can be explained by the fact that the gas molecules are attracted to each other, which reduces their average kinetic energy and therefore reduces the pressure.
The more tightly the molecules are held together, the greater the reduction in pressure will be, as can be seen in the graph of Model 3. In summary, intermolecular forces do cause pressure to be lower than predicted, and this is observed in Model 3.
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The volume of a gas is 550 mL at 960 mm Hg and 200.0 C. What volume
would the pressure of the gas be 830 mm Hg if the temperature is reduced
to 150.0C? Make sure your answer is rounded to nearest whole number
and your final answer has the units of mL. *
Answer:
The volume will be 568.89 mL.
Explanation:
Boyle's law says that "The volume occupied by a given gaseous mass at constant temperature is inversely proportional to pressure"
Boyle's law is expressed mathematically as:
Pressure * Volume = constant
or P * V = k
Gay-Lussac's law indicates that when there is a constant volume, as the temperature increases, the pressure of the gas increases. And when the temperature is decreased, the pressure of the gas decreases. That is, the pressure of the gas is directly proportional to its temperature. Gay-Lussac's law can be expressed mathematically as follows:
\(\frac{P}{T}=k\)
Where P = pressure, T = temperature, K = Constant
Finally, Charles's law indicates that as the temperature increases, the volume of the gas increases and as the temperature decreases, the volume of the gas decreases. In summary, Charles's law is a law that says that when the amount of gas and pressure are kept constant, the quotient that exists between the volume and the temperature will always have the same value:
\(\frac{V}{T}=k\)
Combined law equation is the combination of three gas laws called Boyle's, Charlie's and Gay-Lusac's law:
\(\frac{P*V}{T} =k\)
Studying an initial state 1 and a final state 2, it is fulfilled:
\(\frac{P1*V1}{T1} =\frac{P2*V2}{T2}\)
In this case:
P1= 960 mmHgV1= 550 mLT1= 200 C= 473 K (being 0 C=273 K)P2= 830 mmHgV2= ?T2= 150 C= 423 KReplacing:
\(\frac{960 mmHg*550 mL}{473K} =\frac{830 mmHg*V2}{423 K}\)
Solving:
\(V2=\frac{423 K}{830 mmHg} *\frac{960 mmHg*550 mL}{473K}\)
V2= 568.9 mL
The volume will be 568.89 mL.
How many moles are in 8.11 x 10e20 molecules of CH4
Answer:
0.0013 molesExplanation:
To find the number of moles in a substance given it's number of entities we use the formula
\(n = \frac{N}{L} \\\)
where n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
From the question we have
\(n = \frac{8.11 \times {10}^{20} }{6.02 \times {10}^{23} } \\ = 0.0013471\)
We have the final answer as
0.0013 molesHope this helps you
While in europe, if you drive 113 km per day, how much money would you spend on gas in one week if gas costs 1.10 euros per liter and your car's gas mileage is 28.0 mi/gal ? assume that 1euro=1.26dollars .
To calculate the amount of money you would spend on gas in one week while driving 113 km per day in Europe, gas costs we need to convert the given values and perform some calculations.
1 km = 0.621371 miles
So, 113 km is approximately equal to 70.21 miles (113 km * 0.621371).
Miles per gallon (mpg) = 28.0 mi/gal
Miles driven per week = 70.21 mi/day * 7 days = 491.47 miles/week
Gallons consumed per week = Miles driven per week / Miles per gallon = 491.47 mi/week / 28.0 mi/gal ≈ 17.55 gallons/week
1 euro = 1.26 dollars
Cost per gallon = 1.10 euros/gallon * 1.26 dollars/euro = 1.386 dollars/gallon
Total cost per week = Cost per gallon * Gallons consumed per week = 1.386 dollars/gallon * 17.55 gallons/week ≈ 24.33 dollars/week
Therefore, if gas costs 1.10 euros per liter, and your car's gas mileage is 28.0 mi/gal, you would spend approximately 24.33 dollars on gas in one week while driving 113 km per day in Europe.
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a certain ore is 27.9'.9% nickel by mass. how many kilograms of this ore would you need to dig up to have 85.0 g85.0 g of nickel?
To get 85g of nickel, 0.304 kilogram of the ore must be mined.
27.9% of what = 85g
0.279 * x = 85
x = 304.6g = 0.304kg
What is ore?
Ore is a naturally occurring rock or silt that has one or more precious minerals in it that may be extracted, processed, and sold for a profit. Metals are the most common valuable minerals found in ore. To remove the valuable metals or minerals from ore, it is mined from the earth and then processed or refined, frequently by smelting.
An ore is a naturally occurring collection of minerals from which metals can be profitably extracted. Originally, the term "ore" solely referred to metallic minerals, but today it also refers to nonmetallic materials that have been deposited in rock after it has formed.
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how many primary carbon are in 2,3 dimethylpentane
Answer:
There are 7 carbons in 2,3 dimethylpentane
Explanation:
Because 2,3-dimethlypentane is an organic compound of carbon and hydrogen with formula C7H16
When light waves pass through solids, the speed of the wave ___________.
remains the same
decreases
increases
It woukd decrease.
I am sure its correct you can trust me becuase I took the test.
Answer:
The speed of the wave decreases.
Explanation:
When light waves do pass through a medium, any solid, liquid, or gas, the speed of the waves actually decreases. Solids are more dense than liquids, so they decrease the speed of light even more.
(I did the quiz btw!!)
for kilograms of carbon monoxide (co) is contained in a rigid tank with a volume of 1 m3. the tank is fitted with a paddle wheel that transfers energy to the co at a constant rate of 14w for monoxide increases by 10 kj/kg. if no overall changes in kinetic and potential energy occur, determine
Based on the data provided, the (a) Specific volume at the final state = 0.25 m³/kg ; (b) Work done by CO = 50.4 KJ ; (c) Heat transfer to CO = 100.4 KJ ; (d) The direction of heat transfer = from paddle wheel to CO.
Given data :
Mass of carbon monoxide (CO) = 4 kg
Volume of the tank = 1 m³
Energy transferred to CO by paddle wheel (W) = 14 W
Time = 1 hr
Increase in the specific internal energy of carbon monoxide (CO) = 10 kJ/kg
(a) Specific volume at the final state, in m³/kg can be calculated as follows :
Using the first law of thermodynamics : Q = ∆U + W …………………(1)
where,
Q = Heat transferred to CO
∆U = Change in internal energy of CO
W = Work done by CO
∆U = m × u₂ - m × u₁
where, m = Mass of CO, and u₂ = Final specific internal energy of CO
u₁ = Initial specific internal energy of CO
∴ u₂ = u₁ + (∆U / m)= u₁ + (10 × 10³ / 4) ………………(2)
Using ideal gas equation:P V = m R T
where,
P = Pressure of CO
V = Volume of CO
T = Temperature of CO = Constant
R = Gas constant
∴ Specific volume (v) of CO can be given by : v = V / m …………………(3)
(b) Work done by CO, W = Energy transferred to CO by the paddle wheel = 14 × 1 × 3600 ………………(4) = 50400 J
Heat transfer to CO, Q = ∆U + W - ∆K.E - ∆P.E
There is no change in kinetic energy and potential energy of the system.
Hence,∆K.E = ∆P.E = 0
∴ Q = ∆U + W ………………….(5)
Solving equations (2), (3), (4) and (5) we get : v = V/m = 1/4 = 0.25 m³/kg
Work done, W = 50400 J = 50.4 KJ
(c) Heat transferred, Q = ∆U + W= (4 × 10 × 10³) / 4 + 50400 = 100400 J = 100.4 KJ
(d) Heat is transferred from paddle wheel to the CO.
Therefore, the direction of heat transfer is from paddle wheel to CO.
Thus, the required answers are : (a) 0.25 m³/kg ; (b) 50.4 KJ ; (c) 100.4 KJ ; (d) from paddle wheel to CO
The complete question is : Four kilogram of carbon monoxide (CO) is contained in a rigid tank with a volume of 1 m3. The tank is fitted with a paddle wheel that transfers energy to the CO at a constant rate of 14 W for 1 h. During the process, the specific internal energy of the carbon monoxide increases by 10 kJ/kg. If no overall changes in kinetic and potential energy occur, determine
(a) the specific volume at the final state, in m3/kg.
(b) the energy transfer by work, in kJ.
(c) the energy transfer by heat transfer, in kJ.
(d) the direction of the heat transfer.
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The reaction between hydrogen gas and chlorine gas produces hydrogen chloride according to the following equation: H2(g) + Cl2(g) → 2HCl(g). Using the following bond enthalpies(D) calculate the enthalpy of reaction. D(H-H) =436 kJ/mol; D(Cl-Cl) = 243 kJ/mol D(H-Cl) = 432 kJ/mol
Answer:
The enthalpy of reaction is -185 kJ
Explanation:
To get the reaction:
H₂(g) + Cl₂(g) → 2 HCl(g)
you must follow the following steps:
1) Reactive molecules must break their bonds to obtain their atoms.
H₂(g) → 2 H(g)
Cl₂(g) → 2 Cl(g)
Bond energy (or enthalpy) is the energy required to break one mole of bonds of a gaseous substance. In the case of diatomic molecules with a single bond, it corresponds to the energy necessary to dissociate 1 mole of said substance in the atoms that form it.
Whenever you want to break links you must supply energy, so the link enthalpy will have positive values; while when a mole of bonds is formed energy is released and the bond enthalpy of this process will be negative.
In this case you will then have:
H₂(g) → 2 H(g) ΔH=436 kJ/mol
Cl₂(g) → 2 Cl(g) ΔH=243 kJ/mol
So the total energy needed to break all the bonds is:
ΔH=1 mol*436 kJ/mol +1 mol* 243 kJ/mol= 679 kJ
2) The atoms that were obtained in the break of the bonds must be combined to obtain the product.
2 H (g) + 2 Cl (g) → 2 HCl (g)
Being the single bond energy for one mole of 431 kJ H-Cl bonds and considering that two moles of H-Cl bonds are formed, the ΔH is:
ΔH = -2 moles* (432 kJ/mol) = -864 kJ
As mentioned, when a mole of bonds is formed energy is released, the bond enthalpy of this process will be negative. So the formation of HCl is negative.
Hess's law states that the energy change in an overall chemical reaction is equal to the sum of the energy changes in the individual reactions comprising it. So:
ΔHtotal= -864 kJ + 679 kJ
ΔHtotal= -185 kJ
The enthalpy of reaction is -185 kJ
How would you define speed and the formula to find speed?
Answer:
Speed is how fast you cover a certain distance
\(Speed=\frac{Distance}{time}\)
A change in pH will significantly affect the solubility of which, if any, of the following compounds?BaF2BaCl2BaBr2BaI2None of the solubilities will be significantly affected
The solubility of BaF₂ will be significantly affected by a change in pH. A change in pH will significantly affect the solubility of BaF₂ due to the formation of HF, which is a weak acid. The solubilities of BaCl₂, BaBr₂, and BaI₂ are not significantly affected by changes in pH.
BaF₂ is an ionic compound that dissolves in water to form Ba²⁺ and F⁻ ions. At neutral pH, the solubility of BaF₂ is low because the F⁻ ions react with H+ ions in the water to form HF, which is a weak acid and not very soluble in water. However, at high pH (above 8), the concentration of H⁺ ions in the water is low, so the F⁻ ions are not consumed in this reaction and remain in solution, resulting in increased solubility of BaF₂.
In contrast, the solubilities of BaCl₂, BaBr₂, and BaI₂ are not significantly affected by a change in pH. These compounds are also ionic and dissolve in water to form Ba²⁺ and Cl⁻, Br⁻, and I⁻ ions, respectively. The anions do not react with water to form weak acids or bases, so the solubility of these compounds is largely determined by the strength of ionic bonds between the Ba²⁺ cation and the anions. pH changes in water do not affect these bonds.
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What is the formula of a compound containing al³⁺ and s²⁻ ions?
The formula of the compound containing Al³⁺ and S²⁻ ions is Al₂S₃.
Ionic compounds are formed when ions with opposing negative and positive charges form ionic bonds and form compounds, which are compounds made of ions.
Ionic compounds are named by stating the cation first, followed by the anion. When a neutral atom loses one or more electrons, it acquires a positive charge and is called a cation and when an atom gains one or more electrons, it becomes an anion and acquires a negative charge.
Valency of Al is 3 and that of S is 2. Exchange of valencies takes place during the formation of ionic compound and thus the formula is Al₂S₃.
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how does the length of the fatty acid tails of the phospholipids within a membrane affect the fluidity of a membrane?
Phospholipids with longer fatty acid tails are less fluid than membranes containing phospholipids with shorter fatty acid tails.
More specifically, whether the fatty acids are saturated or unsaturated has an effect on membrane fluidity. Saturated fatty acids have no double bonds in the hydrocarbon chain, and the maximum amount of hydrogen. The absence of double bonds decreases fluidity, making the membrane very strong and stacked tightly.
Generally speaking, membranes containing lipids with longer fatty acid tails are less fluid than membranes containing lipids with shorter fatty acid tails. This is because lipids with longer fatty acid tails have more surface area with which they can interact with one another.
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Explain the process of rainwater harvesting with its advantages .
Answer:
the environmental benefits of rain water harvesting
Explanation:
rainwater harvesting can reduce stormwater runoff a property by reducing stormwater runoff rainwater harvesting can reduce is term peak flow volume and velocity in local cricket stream and rivers thereby reducing the potential for stream Bank erosion
what phase or phases are present under these conditions. a) t = -70 oc and p = 1.0 atm b) t = -40 oc and p = 15.5 atm c) t = -80 oc and p = 4.7 atm
Phases present under these conditions are: a) At t = -70 OC and p = 1.0 atm, the phase is solid phase (Ice). b) At t = -40 OC and p = 15.5 atm, the phase is gas phase (steam). c) At t = -80 OC and p = 4.7 atm, the phase present is solid phase (Ice).
Under standard conditions, water exists in its liquid phase at a temperature of 25 °C and a pressure of 1 atm. When the temperature and pressure conditions are modified, the phase of water may change.
The freezing point of water is 0 degrees Celsius, whereas the boiling point is 100 degrees Celsius. Water may exist as a solid (ice), liquid (water), or gas (steam) depending on temperature and pressure.
The state of water, such as gas, liquid, or solid, is determined by temperature and pressure. Water can exist in three states at a given temperature and pressure: liquid, solid, and gas.
The conditions of temperature and pressure at which water shifts from one state to another are known as phase transitions or changes.
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Describe the best method for separating a mixture
of sand, salt, and steel shavings by placing the
steps below in the correct order.
Heat the mixture to evaporate the water.
Pour the mixture through a filter to separate
the sand
Pass a magnet over the mixture to remove
the steel.
Add water to the sand/salt mixture and stir to
dissolve the salt.
Answer:
Filtration is a method for separating an insoluble solid from a liquid. When a mixture of sand and water is filtered: the sand stays behind in the filter paper (it becomes the residue ) the water passes through the filter paper (it becomes the filtrate )
Explanation:
Answer:
Describe the best method for separating a mixture of sand, salt, and steel shavings by placing the steps below in the correct order.
⇒ 4 Heat the mixture to evaporate the water.
⇒ 3 Pour the mixture through a filter to separate the sand.
⇒ 1 Pass a magnet over the mixture to remove the steel.
⇒ 2 Add water to the sand/salt mixture and stir to dissolve the salt.
21(3d − 4) + 100 = 58 State the solution. (If all real numbers
are solutions, enter REALS. If there is no solution, enter NO
SOLUTION.)
The solution to the equation and value of variable 21(3d - 4) + 100 = 58 is d = 2/3.
Solve the equation 21(3d - 4) + 100 = 58, we can begin by simplifying and isolating the variable:
21(3d - 4) + 100 = 58
Distribute 21 to the terms inside the parentheses:
63d - 84 + 100 = 58
Combine like terms:
63d + 16 = 58
Subtract 16 from both sides:
63d = 42
Divide both sides by 63:
d = 42/63
Simplifying the fraction gives:
d = 2/3
The solution to the equation is d = 2/3.
The solution to the equation 21(3d - 4) + 100 = 58 is d = 2/3. By simplifying the equation, we find that dividing both sides by 63 results in the solution of d = 2/3, which satisfies the original equation.
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Nitrogen has one more valence electron than carbon has. What can you infer about nitrogen's location on the periodic table. 5 points Nitrogen is in the first group. Nitrogen and carbon are in different groups. Nitrogen is directly above carbon but within the same group. Nitrogen is directly below carbon but within the same group.
Answer:
nitrogen and carbon are in different groups
Explanation:
the group number determines the number of valence electrons the element has. since nitrogen and carbon have different numbers, they cannot be in the same group.
The nervous system sends messages to control activities in the body. false true
Answer:
true
Explanation:
took test
Frankie earns $5 each time he babysits his little sister. He has saved $30. Frankie wants to save $52 to buy a new skateboard. How many more times will Frankie need to babysit to have enough money to buy the skateboard?
Answer:
52- the 30 he has already = $22
22/5= 4.4
he will have to babysit 5 times
what happens when you add vinegar to baking soda
Answer:
When baking soda is mixed with vinegar, something new is formed. The mixture quickly foams up with carbon dioxide gas. If enough vinegar is used, all of the baking soda can be made to react and disappear into the vinegar solution.
Explanation:
which ph value corresponds to the highest concentration of hydronium? select the correct answer below: 1.2 3.7 6.4 8.9
The correct option is A, the pH value of 1.2 would correspond to the highest concentration of hydronium ions.
pH is a measure of the acidity or basicity (alkalinity) of a solution. It is defined as the negative logarithm of the hydrogen ion concentration in a solution. The pH scale ranges from 0 to 14, with 7 being neutral. Solutions with a pH below 7 are considered acidic, while solutions with a pH above 7 are considered basic or alkaline.
The pH value of a solution affects the chemical and biological processes that occur within it. For example, enzymes, which are proteins that catalyze chemical reactions in living organisms, have an optimal pH range in which they function best. Changes in pH can also affect the solubility and stability of drugs and other chemicals. Measuring pH is important in many fields, including chemistry, biology, medicine, and environmental science. Common methods for measuring pH include pH meters and litmus paper
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A centimeter and milimeter differ from each other by a factor of _____?
Answer:
10
Explanation:
a centimeter and a milimeter differ from each other by a factor of 10
Answer: 10
Explanation:
calculate the mass of bromine in 50.0 g of potassium bromide
Answer:
6 Percent Composition. 1. Molar Mass of KBr K = 1(39.10) = 39.10 Br =1(79.90) =79.90 MM = 119.0 79.90 g 119.0 g = 0.6714 3. 0.6714 x 50.0g = 33.6 g Br 2.
The mass of bromine that is present in 50.0 g of potassium bromide is 80 grams.
What is the relation between moles and mass?Relationship between moles and mass will be represented by the below equation:
n = W/M, where
W = given mass
M = molar mass
First we convert the mass of KBr into moles to calculate the moles of bromine through the stoichiometry as:
Moles of KBr = 50g / 119g/mol = 0.42 mol
Dissociation reaction will be represented as:
KBr → K⁺ + Br⁻
From the stoichiometry of the reaction it is clear that 1 mole of KBr produces 1 mole of Bromide, means 1 mole of bromine is present in 1 mole of KBr.
Now mass of Br will be calculated by using the above equation as:
Mass of Br = (1mol)(80g/mol) = 80g
Hence required mass of bromine is 80 grams.
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