Answers
\(\huge\boxed{\text{London / Van de Waals}}\)
_____________________________________\(\huge\textbf{Van de Waals}\)London Dispersion force or Van de waals force is a temporary attractive force which are the weakest and occur between nonpolar noble gases and same charges. This force is weaker because they have more electrons that are farther from the nucleus and are able to move around easier.
_____________________________________\(\huge\textbf{Dipole-Dipole}\)Dipole force is present between the polar molecules. Polar molecules are those molecules which have slightly negative and slightly positive charge. Dipole-dipole forces are attractive forces between the positive end of one polar molecule and the negative end of another polar molecule.
_____________________________________\(\huge\textbf{Hydrogen Bonds}\)It is a special type of dipole force present between polar molecules, it is formed between Hydrogen atom which forms positive ion, and the other negative ion. It results from the attractive force between a hydrogen atom covalently bonded to a very electronegative atom such as a N, O, or F atom. The hydrogen bond is one of the strongest intermolecular attractions, but weaker than a covalent or an ionic bond.
_____________________________________Best Regards,'Borz'Related Questions
8.0 liters I2 forms at STP. How many moles of KI were required for the reaction?
Answers
Answer:
0.71 moles KI
Explanation:
At STP, there should be 1.0 moles at 22.4 L. However, there are only 8.0 L of I₂. Therefore, we must set up a proportion to find the correct moles of I₂.
\(\frac{1 mole}{22.4 L} =\frac{? moles}{8.0 L}\) <----- Proportion
\(8.0 = 22.4(? moles)\) <----- Cross multiply
\(0.36 = ? moles\) <----- Divide both sides by 22.4
To find the moles of KI, you can use the mole-to-mole ratio from the balanced equation coefficients. The final answer should have 2 sig figs.
2 KI(aq) + Cl₂(g) ---> 2KCl(aq) + 1 I₂(g)
^ ^
0.36 moles I₂ 2 moles KI
---------------------- x -------------------- = 0.71 moles KI
1 mole I₂
Answer: 0.71 moles KI
Explanation:
(a) (0) A drinking water treatment plant has a tank containing 100 m3 of untreated water. At time zero, a disinfectant-water solution containing 0.4 kg of Chlorine per m3 enters the tank at a rate of 20 m3 per minute. Simultaneously, a drain is opened at the bottom of the tank allowing the water to leave the tank at 10 m3 per minute. Assume that the solution in the tank is kept perfectly mixed at all times. Determine the Chlorine content as a function of time. [6 marks] (ii) What will be the Chlorine content in the tank after 20 minutes? [2 marks] (iii) How long will it take the Chlorine content in the tank to reach 180 kg?
Answers
It is not possible to determine the concentration of chlorine in the tank after 20 minutes. It takes approximately 2.96 minutes for the concentration of chlorine in the tank to reach 180 kg/m³.
The concentration of chlorine in a water treatment plant is to be determined as a function of time, as well as its concentration after 20 minutes and the time it takes to reach a concentration of 180 kg.
(a) (i) Using a mass balance equation, let C be the chlorine concentration in the tank and t be time. The mass of chlorine in the tank at any time, M(t), is M(t) = VC where V is the volume of water in the tank, which is initially 100 m3. The rate of change of chlorine concentration in the tank, dC/dt, is given by dC/dt = (1/V) dM/dt. Using the given values of the inlet and outlet rates, the rate at which chlorine enters the tank is dM/dt = 0.4 kg/m3 × 20 m3/min = 8 kg/min. The rate at which chlorine leaves the tank is given by the product of the concentration and the outlet rate. When the tank is initially filled with untreated water, the concentration of chlorine is zero.
Therefore, the rate at which chlorine leaves the tank initially is dM/dt = C × 10 m3/min = 0.This means that the concentration of chlorine in the tank remains zero until chlorine begins to enter the tank. Therefore, for t > 0, the differential equation is dC/dt = 8/(100 − 10t)Solving this differential equation gives C = ln(100 − 10t) + K where K is the constant of integration. The value of K can be found using the initial condition that the concentration of chlorine is zero when t = 0:C = ln(100 − 10t) − 2.3026
(ii) The concentration of chlorine in the tank after 20 minutes is C = ln(100 − 10(20)) − 2.3026= ln(−100) − 2.3026The value of the natural logarithm is undefined for negative numbers. Therefore, it is not possible to determine the concentration of chlorine in the tank after 20 minutes.
(iii) To find the time at which the concentration of chlorine in the tank reaches 180 kg/m3, set C equal to 180 kg/m³ and solve for t:180 = ln(100 − 10t) − 2.3026182.3026 = ln(100 − 10t)10t = 29.6493t = 2.9649 min. Therefore, it takes approximately 2.96 minutes for the concentration of chlorine in the tank to reach 180 kg/m³.
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Consider all of the different types of c-h bonds in cyclopentene and rank them in order of increasing bond strength? 10. 25 (
Answers
In cyclopentene, there are three types of C-H bonds:
Allylic C-H bond (bond adjacent to the double bond)
Bridgehead C-H bond (bond at the bridgehead carbon)
Methylenic C-H bond (bond in the ring)
The order of increasing bond strength is generally:
Allylic C-H bond
Methylenic C-H bond
Bridgehead C-H bond
Cyclopentene is a cyclic hydrocarbon with the molecular formula C5H8. It is an unsaturated compound with a double bond between two carbon atoms in the ring, making it an alkene. Cyclopentene is a clear, colorless liquid that is insoluble in water but soluble in many organic solvents. It is commonly used as a starting material in the synthesis of various organic compounds, including pharmaceuticals and agrochemicals.Cyclopentene undergoes various chemical reactions due to its unsaturated nature, such as addition reactions with electrophiles and hydrogenation reactions. It can also undergo polymerization to form poly(cyclopentene) with a high glass transition temperature and good mechanical properties.
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Which statement is the best description of a chemical bond
Answers
an object placed in a graduated cylinder raises the volume from 12.2mL to 14.5mL. Find the volume of the object
Answers
Volume of object = 14.5 mL - 12.2 mL = 2.3 mL
So the volume of the object is 2.3 mL.
Which of the following is a compound?
sodium
iron
carbon dioxide
chicken noodle soup
Answers
When the elements combine, some individual property of the elements is lost and the newly formed compound has new properties. Here among the given options, the compound is carbon dioxide. The correct option is C.
What is a compound?The chemical substances which are made up of two or more elements that are chemically bound together in a definite ratio are defined as the compounds. The compounds are represented by the chemical formula.
A chemical formula is the symbolic representation of atoms which constitute a particular chemical compound. The chemical formula of water is H₂O, which contains 'H' and 'O' atoms.
Here the chemical formula of the compound carbon dioxide is CO₂ and it is made up of two different elements, they are 'C' and 'O' atoms. The type of bonds in a compound may be ionic or covalent.
Thus the correct option is C.
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.Consider the following reaction and select the false statement below.
NaI + 3HOCl → NaIO3 + 3HCl
A. NaI is the reducing agent
B. If ?G
Answers
The false statement below is B. If ?G < 0, the reaction is spontaneous.
The statement is incomplete and not entirely correct. The Gibbs free energy change (?G) of a reaction determines the spontaneity of a reaction at constant temperature and pressure. A negative? G indicates that the reaction is thermodynamically favorable and spontaneous under standard conditions. However, the value of? G can be affected by changes in temperature, pressure, and concentration of reactants and products.
Regarding statement A, NaI is indeed the reducing agent in this reaction. In this reaction, NaI is oxidized to NaIO3, while HOCl is reduced to HCl.
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In the rock cycle, where is the energy being released?
Group of answer choices
magma
magma to igneous
igneous to sedimentary
sedimentary to metamorphic
There's a picture of the rock cycle just so you know :)
Answers
Answer:
the two major sources of energy for the rock cycle are also shown; the sun provides energy for surface processes such as weathering, erosion, and transport, and the Earth's internal heat provides energy for processes like subduction, melting, and metamorphism.
what does WHMIS mean?
Answers
Answer:
Workplace Hazardous Materials Information System
WHMIS is a short form for Workplace Hazardous Materials Information System. It is a comprehensive plan for providing information on the safe use of hazardous materials used in Canadian workplaces. Information is provided by means of product labels, material safety data sheets (MSDS) and worker education programs.
Answer:
Workplace Hazardous Materials Information System
Explanation:
How much voltage is required to run 1.6 A of current through a 240
resistor? Use AV = IR.
O A. 380 V
O B. 6.7 x 10-3 v
O C. 150 V
O D. 2.6 x 10-3 v
Answers
Answer:
answer is not there
Explanation:
V=1.6×240
V=384volt
The heart has four chambers and, within them, blood normally circulates in only one direction: from the right atrium to the right ventricle and from the left atrium to the left ventricle. A certain disease sometimes allows the flow to occur in the opposite direction, that is, it passes from the left ventricle to the left atrium. This disease affects 2% to 3% of the population and rarely produces serious heart problems. Some patients have symptoms such as chest pain, fatigue, palpitation and dizziness. Which heart structure is affected by this disease. How did you reach that conlucsion?
Answers
Answer:
Likely an issue with the mitral valve.
Explanation:
If I read this correctly, you are likely referring to mitral regurgitation, which is a process where your mitral value does not close tightly enough to stop the blood to flow into left atrium.
Normally, when the left ventricle is full, the mitral valve shuts to prevent blood blood from flowing backward into the atrium while the ventricle contracts, and this allows for blood to go to aorta and to body. According to question since the process is reversed, I am gonna go out on a limb and say mitral valve is likely the structure affected by this since and how I came to conclusion is all the explaintion I did earlier.
Which process produces the energy that is used by solar panels?
A. Combustion
B. Chemical Decay
C. Nuclear Decay
D. Nuclear Fusion
Answers
D. nuclear fusion
I just took the test
which size of micropipette would you select to deliver 215 microliters?
Answers
The size of micropipette that you would select to deliver 215 microliters would be a micropipette with a volume range of 200-1000 microliters.
What is a micropipette?
A micropipette is a laboratory instrument used to measure and dispense small volumes of liquid, typically in the range of microliters (µL) or nanoliters (nL). They are commonly used in chemistry, biology, and biochemistry experiments, as well as in clinical and industrial settings.
Micropipettes consist of a handle, a digital or manual volume adjustment mechanism, and a tip that is placed into the liquid to be dispensed. They work by creating a vacuum or positive pressure inside the tip, which draws or pushes the liquid out of the tip.
Micropipettes come in different volume ranges and it is important to select the right one to ensure accurate delivery of the desired volume. For example, a micropipette with a volume range of 2-10 microliters would not be suitable for delivering 215 microliters, while a micropipette with a volume range of 200-1000 microliters would be more appropriate.
It's also important to note that, even if the micropipette is able to deliver 215 microliters, you should always check the calibration of the micropipette before use, to make sure that it's delivering the correct volume.
Hence, a micropipette with a volume range of 200-1000 microliters is suitable to deliver 215 microliters.
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Thermal energy in the inner and outer core is heat that is from the original formation of Earth. Thermal energy is
transferred from the outer core towards the crust through the mantle. Which BEST describes how energy moves
through the mantle?
A
Thermal energy radiates from the outer core, through the mantle, to the crust.
B
Thermal energy moves by conduction from the outer core, through the mantle, and to the
crust by direct contact.
Thermal energy rises with heated magma from near the core and sinks back down as it cools
through convection.
D
Thermalbyergy heats up the magma by radiation and passes through the mantle as
conduction
Answers
Answer:it’s b they transfer thermal energy away from earths core towards its crust
Explanation:
Good luck!
Thermal energy moves from the outer core, through the mantle, and to the crust by conduction.
Heat transferred from the core through the mantle and to the crust in the process of conduction. The lower mantle is heated directly by conduction from the core. In conduction, heat is transferred from one particles to another.
In the process of conduction, heat flows from warmer objects to cooler objects so the outer core has high amount of heat energy which is transferred to the surrounding mantle layer due to its lower temperature so we can conclude that thermal energy moves from the outer core, through the mantle and to the crust by conduction.
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of the following, the only unpaired dural sinus is the
Answers
The only unpaired dural sinus is the Superior Sagittal Sinus.
The dural sinuses are venous channels located between the layers of the dura mater, the outermost membrane covering the brain. They collect deoxygenated blood and cerebrospinal fluid from the brain and drain it back into the circulatory system.
Typically, the dural sinuses are paired, meaning there are two sinuses on each side of the brain. However, there is one unpaired dural sinus called the Superior Sagittal Sinus. It is located in the midline of the brain, running along the superior margin of the falx cerebri, which is a fold of the dura mater that separates the two cerebral hemispheres.
The Superior Sagittal Sinus receives blood from the cerebral veins and drains into the confluence of sinuses at the back of the skull.
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The only unpaired dural sinus is the superior sagittal sinus. The dura mater, the brain's outermost covering, contains layers that are home to the venous channels known as dural sinuses. Hence option B is correct.
They are essential in the process of returning deoxygenated blood from the brain to the systemic circulation.
Superior sagittal sinus: Located at the superior edge of the falx cerebri, a fold of dura mater that divides the two cerebral hemispheres, the superior sagittal sinus is an unpaired dural sinus. It draws blood from different cerebral veins and empties into a group of sinuses.
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Your question is incomplete, most probably the complete question is :
Of the following, the only unpaired dural sinus is the
A) cavernous sinus.
B) superior sagittal sinus.
C) transverse sinus.
D) carotid sinus.
at a cost of $1600/oz, how much would you have to pay for a solid cubic foot of gold?
useful information: (1 oz = 28.4 g; 1 in = 2.54 cm)
Answers
We'll begin by calculating the mass in ounce (oz) of a cube foot (ft³) of gold. This can be obtained as follow:
Density of gold = 19298 oz/ft³
Volume of gold = 1 ft³
Mass of gold =?Density = mass /volume
19298 = mass / 1
Mass of gold = 19298 ozFinally, we shall determine the cost of 19298 oz of gold. This can be obtained as follow:
1 oz = $ 1600
Therefore,
19298 oz = 19298 × 1600
19298 oz = $ 30876800
Therefore, a solid cube foot of gold (i.e 19298 oz) will cost $ 30876800
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Give the long configuration for Uranium _
WRITE ANSWER WITH THE FOLLOWING FORMAT
1s2 2s2.........etc
Give the long configuration for Uranium
WRITE ANSWER WITH THE FOLLOWING FORMAT
1s2 2s2.........etc
Answers
The electron configuration for Uranium (U) is based upon the placement of uranium in the fourth column of the actinide series or f block. Therefore the electron configuration for uranium must end as 5f4,
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4e14 5d10 6p6 7s2 5f4
This notation can be written in core notation or noble gas notation by replacing the : 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4e14 5d10 6p6 with the noble gas [Rn].
[Rn] 7s2 5f4
I hope this was helpful.
describe how to identify the smell of gas in the laboratory
Answers
Answer:
When you are in the laboratory and take a direct sniff the chemicals you are using, you run the risk of damaging your mucous membranes or your lungs. When its necessary to smell chemicals in the lab, the proper technique is to cup your hand above the container and waft the air towards your face.
Gas is a naturally odourless substance, but the completely harmless artificial smell is added to make it more detectable. The substance is called mercaptan and gives off a strong sulphur like smell.
how can you use these materials to test whether land or water heats faster?
Materials:
sand
water
heat lamps
thermometers
cups
Answers
Answer:
Put sand in one cup and water in the other. Put two heat lamps at equal height and under each one put the water and sand, this must be done at the same exact time. Set a timer for 5, then 10, then 15, and so forth minutes. Each time measure the temperature of each with the thermometers and write the down. Have a certain temperature you want them to get to and see which gets to it quicker. Then set a new temp 3 times to see if the answer is consistent.
Explanation:
Doing this would test whether land or water heats quicker.
Answer:
heat lamps
Explanation:
What is the molarity of a solution in which 250 grams of NaCl are dissolved in 2.9 L of water?
Answers
Answer:
About 1.48 M.
Explanation:
The formula for molarity is mol/L.
So firstly, you must find the amount of moles in 250 grams of NaCl.
I do this by using stoichiometry. First, I find how nany grams are in a single mole of NaCl. This is around 58.44 grams/mole. Now that I know this, I can now use a stoich table. (250 g NaCl * 1 mol NaCl / 58.44 g NaCl). I plug this into my calculator.
I get that 250 grams of NaCl is equal to about 4.28 moles.
Now I just plug into the formula!
4.28 moles/2.9 L = about 1.48
I've attached a picture of my personal notes below which shows work I have done in similar equations.
_H3PO4 + _HCl --->_PCl5 + _H2O
A) 1, 5, 4, 1
B) 1, 2, 3, 2
C) 4, 1, 2, 5
D) 1, 5, 1, 4
Answers
Dennis g studio and I don't have any money
Isomers are molecules with the same molecular formula, but different structural formulae.
How many isomers are there in C7H16?
A.6
B.7
C.8
D.9
Answers
Answer:
D 9 is the answer
Explanation:
Hope it helps you
Please mark as brainliest answerThe mass of a solid substance is 21.1164 g. If the volume of
the solid substance is 19.9 cm3, calculate the density of the
substance with the correct number of significant digits.
Answers
Answer:
The density of the substance is 1.0611 \(\frac{g}{cm^{3} }\)
Explanation:
The density of a substance is a characteristic property that matter, whether solids, liquids or gases, has to be compressed in a given space, that is, it allows us to measure the amount of mass in a certain volume of a substance.
Density is expressed as follows:
\(density=\frac{mass}{volume}\)
In this case:
density: ?mass: 21.1164 gramsvolume: 19.9 cm³Replacing:
\(density=\frac{21.1164 grams}{19.9 cm^{3} }\)
density= 1.0611 \(\frac{g}{cm^{3} }\)
The density of the substance is 1.0611 \(\frac{g}{cm^{3} }\)
Given subsets A and B of Ω, identify all sets in σ(A,B).
Answers
The sets in σ(A,B) are the smallest σ-algebra that contains both A and B.
In probability theory and measure theory, a σ-algebra is a collection of subsets of a given set Ω that satisfies certain properties. The notation σ(A,B) represents the smallest σ-algebra that contains both subsets A and B. This means that σ(A,B) consists of all possible subsets that can be formed by taking the union, intersection, and complement of sets in A and B.
To understand this concept better, let's consider an example. Suppose we have a set Ω = {1, 2, 3, 4} and two subsets A = {1, 2} and B = {2, 3}. The σ-algebra σ(A,B) would include the empty set, the set Ω itself, as well as other subsets such as {1}, {2}, {3}, {1, 2}, {2, 3}, and {1, 2, 3}. It would also include their complements, for example, the complement of {1} would be {2, 3, 4}.
The σ-algebra σ(A,B) is important in probability theory as it allows us to define probability measures and study various properties of events and random variables. By identifying all the sets in σ(A,B), we can determine the range of events that can be analyzed within this framework.
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please help asap !! i don’t know if that’s the right answer
Answers
Answer:
b, c and d (last three options)
Explanation:
It can't be the first one because:
On the left hand side there is one of everything and then on the right, ther is one zinc, two chloride and 2 hydrogen atoms. It is unbalanced
Second one:
there are 8 carbons on both sides, 20 hydrogens on both sides and 26 oxygen on both sides. It is balanced
Third
1 copper on both sides, 2 hydrogens on both sides and 1 oxygen on both sides. It is balanced
Fourth
4 silver on both sides and 2 oxygens on both sides
Ammonia (NH3 (g), Delta.Hf = –45.9 kJ/mol ) reacts with oxygen to produce nitrogen and water (H2 O(g), Delta.Hf = –241.8 kJ/mol) according to the equation below. 4 upper N upper H subscript 3 (g) plus 3 upper O subscript 2 (g) right arrow 2 upper N subscript 2 (g) plus 6 upper H subscript 2 upper O (g). What is the enthalpy of the reaction? Use Delta H r x n equals the sum of delta H f of all the products minus the sum of delta H f of all the reactants.. –3,572.1 kJ –1,267.2 kJ 1,267.2 kJ 3,572.1 kJ
Answers
Answer: –1,267.2 kJ
Explanation: B on edge, thank me later ;-)
–1,267.2 kJ is the enthalpy of the given reaction. Therefore, the correct option is option A among all the given options.
What is enthalpy?Enthalpy is a thermodynamic system's internal energy total as well as the volume times pressure ratio. Enthalpy is a property or state function that resembles energy; it has the same dimensions as energy and is therefore measured in joules or ergs. The value of enthalpy is solely dependent on the temperature, pressure, as well as composition of the system, not on its history.
The shift in the internal energy equals equivalent to the heat transmitted to, much less than the jobs completed by, the system, in accordance with the principle of energy conservation. The enthalpy change is precisely equal to the heat transmitted to the system if the sole work performed is a change in volume at constant pressure.
ΔH = ΔH for product - ΔH for reactant
= 3,572.1 kJ –1,267.2 kJ
= –1,267.2 kJ
Therefore, the correct option is option A.
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According to the Periodic Table, which element has more than one positive oxidation state (number)?
a. cadmium
b. iron
c. silver
d. zinc
Answers
The answer is b. iron.
Oxidation state or number refers to the number of electrons that an atom has lost, gained, or shared in forming a chemical compound. It is an indication of the degree of oxidation of an atom in a molecule. Elements can have one or more oxidation states.
Iron (Fe) is a transition metal and is located in the middle of the periodic table. Transition metals are known to have multiple oxidation states due to their partially filled d orbitals. Iron has two common oxidation states: +2 and +3. It can also exhibit other oxidation states, such as +4 and +6, but these are less common.
Cadmium (Cd), silver (Ag), and zinc (Zn) are not transition metals and are located in the s-block or p-block of the periodic table. These elements have only one common oxidation state: +2 for Cd and Zn, and +1 for Ag.
Therefore, the correct answer is b. iron, which has more than one positive oxidation state.
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Where can you find a common homogenous mixture?
A salt
B coffee
C orange juice
D trail mix
Answers
Answer:
B. Coffee
Explanation:
Coffee is a common homogenous mixture.
What is the molar mass for Cr(NO3)2
Answers
To find the molar mass of the given compound, we have use the molar masses of each element present in the molecule and multiply them by the number of atoms of each element in the molecule. Once we have these values, add them.
It means that we have to multiply the molar mass of Cr times 1, the molar mas of N times 2 and the molar mass of O times 6:
\(52g/mol\cdot1+14g/mol\cdot2+16g/mol\cdot6=176g/mol\)It means that the molar mass of Cr(NO3)2 is 176g/mol.
How many mL in 5.867 L?
Answers
Answer:
5867ml is the answer to 5.867L to ml