According to the forces of attraction, the hydrogen bonds which are a type of inter molecular forces have the highest boiling point.
What are forces of attraction?
Forces of attraction is a force by which atoms in a molecule combine. it is basically an attractive force in nature. It can act between an ion and an atom as well.It varies for different states of matter that is solids, liquids and gases.
The forces of attraction are maximum in solids as the molecules present in solid are tightly held while it is minimum in gases as the molecules are far apart . The forces of attraction in liquids is intermediate of solids and gases.
The physical properties such as melting point, boiling point, density are all dependent on forces of attraction which exists in the substances.
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Match the term with its definition. A. Bed load A strip of land next to a river that is often very fertile B. Headwater The beginning of a river C. Suspended load Large boulders carried along by a river D. Flood plain Small rocks carried along by a river
Bed load - Large boulders carried along by a river
Headwater - The beginning of a river
Suspended load - Small rocks carried along by a river
Flood plain - A strip of land next to a river that is often very fertile
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What does the half-life of a radioisotope correspond to?
The half-life of a radioisotope corresponds to the length of time required for half of a sample of radioactive material to decay
What is the final concentration of a solution prepared by diluting 35.0 ml of 12.0 m hcl to a final volume of 1.20 l? what is the final concentration of a solution prepared by diluting 35.0 ml of 12.0 m hcl to a final volume of 1.20 l?
The final concentration of the solution prepared by diluting 35.0 ml of 12.0 M HCl to a final volume of 1.20 L is 0.35 M.
Explanation:The final concentration of a solution prepared by diluting 35.0 ml of 12.0 M HCl to a final volume of 1.20 L can be calculated using the formula for dilution: M1V1 = M2V2. In this formula, M1 is the initial concentration, V1 is the initial volume, M2 is the final concentration, and V2 is the final volume.
Firstly, we convert the initial volume from ml to litres because the final volume is given in litres. So, 35.0 ml = 0.035 L. Therefore, the equation becomes: 12.0 M * 0.035 L = M2 * 1.20 L.
On rearranging the equation to solve for M2, the result is 0.35 M.
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2) Pick the statement about the Bohr model of the hydrogen atom that is NOT true. A) The energy of each Bohr orbit is quantized. B) An electron in a stationary state does not emit radiation. C) When an electron jumps to a higher state, energy is absorbed. D) When an electron jumps from one state to another, the electron must gain or lose just the right amount of energy to actually travel the distance between the orbits.
Answer: When an electron jumps from one state to another, the electron must gain or lose just the right amount of energy to actually travel the distance between the orbits.
Explanation:
Bohr in his structure of atom explained that protons which are positively charged particles and neutrons which are neutral particles, are contained in the center of an atom called as nucleus.
The electrons which are negatively charged particles revolve around the nucleus in fixed orbit or shell or energy levels which are termed as quantized. These energy levels are stable and are stationary along with different energy value. The electron remains in the state until energy is absorbed or released.
The electrons absorb energy when it moves from lower energy state to higher energy state. The electrons lose energy when it moves from higher energy state to lower energy state and thus emit radiations corresponding to the energy gap.
Thus the statement when an electron jumps from one state to another, the electron must gain or lose just the right amount of energy to actually travel the distance between the orbits is incorrect because energy is absorbed when electron jumps from one state to another.
The energy is lost when electron falls from one state to another.
Answer: An electron in a stationary state does not emit radiation
Explanation:
I put that on usa test prep and it says correct. the other person who answered this is wrong
During glycolysis, for every 6 moles of glucose that enter the pathway, how many moles of atp are used? how many moles atp are generated? how many moles of nadh are used? how many moles of pyruvate are made?
what happens when sulphur trioxide reacts with concentrated sulphur acid ?
How many moles of Pb(NO3)2 are required if 8 moles of PbCI2 are produced?
Which formulas and their respective names match? I) Li3N lithium nitride II) H2S hydrogen sulfite III) SO2 sulfur dioxide IV) AlF3 aluminum trifluoride
a.I and II
b.I and III
c.II and IV
d.I, II, and III?
Answer: The correct answer is Option b.
Explanation:
Ionic compound is defined as the compound which is formed by the complete transfer of electrons from one atom to another atom. These compounds are usually formed between metals and non-metals.
Covalent compounds are defined as the compounds which are formed by the sharing of electrons between two atoms. These compounds are formed between two non-metals.
The nomenclature of covalent compound is given by:
The less electronegative element is written first.The more electronegative element is written then, and a suffix is added with it. The suffix added is '-ide'.If atoms of an element is greater than 1, then prefixes are added which are 'mono' for 1 atom, 'di' for 2 atoms, 'tri' for 3 atoms and so on..The nomenclature of ionic compounds is given by:
Positive ion is written first.The negative ion is written next and a suffix is added at the end of the negative ion. The suffix added is '-ide'.For the given compounds:
(I) [tex]Li_3N[/tex]: This is an ionic compound and hence, its name is lithium nitride.
(II) [tex]H_2S[/tex]: This is a covalent compound and hence, its name is hydrogen sulfide.
(III) [tex]SO_2[/tex]: This is a covalent compound and hence, its name is sulfur dioxide.
(IV) [tex]AlF_3[/tex]: This is an ionic compound and hence, its name is aluminium fluoride.
Hence, the correct answer is Option b.
What is the volume, in liters, of 576 grams of so2 gas at stp?
The volume of 576 grams of SO₂ gas at STP is approximately [tex]\( 200 \, \text{L}} \).[/tex]
To find the volume of 576 grams of SO₂ gas at STP (Standard Temperature and Pressure), we can use the ideal gas law equation:
[tex]\[ PV = nRT \][/tex]
Where:
- P is the pressure (at STP, [tex]\( P = 1 \)[/tex] atm)
- V is the volume of the gas
- n is the number of moles of gas
- R is the ideal gas constant [tex](\( R = 0.0821 \, \text{Latm/(molK)} \))[/tex]
- T is the temperature in Kelvin (at STP, [tex]\( T = 273.15 \)[/tex] K)
First, calculate the number of moles [tex]\( n \)[/tex] of SO₂ gas:
1. Calculate the molar mass of SO₂:
- Atomic mass of S = 32.07 g/mol
- Atomic mass of O = 16.00 g/mol (there are 2 oxygen atoms)
- Molar mass of SO₂ = [tex]\( 32.07 + 2 \times 16.00 = 64.07 \)[/tex] g/mol
2. Convert grams of SO₂ to moles:
[tex]\[ n = \frac{\text{mass}}{\text{molar mass}} = \frac{576 \, \text{g}}{64.07 \, \text{g/mol}} \approx 9.00 \, \text{mol} \][/tex]
Now, use the ideal gas law to find the volume V:
[tex]\[ V = \frac{nRT}{P} \][/tex]
[tex]\[ V = \frac{9.00 \, \text{mol} \times 0.0821 \, \text{Latm/(molK)} \times 273.15 \, \text{K}}{1 \, \text{atm}} \][/tex]
[tex]\[ V \approx 200 \, \text{L} \][/tex]
What mass of CaCO3 is required to react completely with 0.56 L of HCl?
Which coefficients correctly balance the formula equation nh4no2(s)® n2(g) + h2o(l)?
2 is the coefficient that correctly balance the formula equation: NH4NO2 → N2 + H2O.
BALANCING CHEMICAL EQUATION:A balanced equation is one in which the atoms of each element on both sides of the equation are the same. According to this question, the following unbalanced decomposition reaction is given: NH4NO2 → N2 + H2OTo balance the equation, we make use of coefficients, which are numbers placed in front of the corresponding element or compound involved. The balanced equation is as follows: NH4NO2 → N2 + 2H2O. This equation shows that 2 is the coefficient placed in front of H2O to correctly balance the equation.Learn more about balancing chemical equations at: https://brainly.com/question/8062886
A sample of a compound contains 60.0 g C and 5.05 g H. Its molar mass is 78.12 g/mol. What is the compound’s molecular formula? CH C2H2 C6H6 C6H
A sample of a compound contains 60.0 g C and 5.05 g H.
divide by molar mass of C(12) and H(1) to get molar ratio
C: 60/12=5 and H: 5/1=5
so C:H=5:5=1:1
total molar mass=78
divide by 1C+1H to find the formula: 78/(12+1)=78/13=6
compound is C6H6
What effect does the specific heat capacity of water have on weather?
A. It keeps the temperatures on the coast milder.
B. It lowers the temperature at which ocean water freezes.
C. It stops convection currents from turning into storms.
D. It increases the effect of radiation heating of land.
how are homologous structures such as forelimbs evidence for evolution ?
The study of the gradual change of an organism over a period of time is called evolution.
What is a homologous organ?Those structures of different species which have the same structure but the different function is called homologous organ.According to the question, the forelimbs are great evidence of evolution because the forelimbs give the ancestral connection between two species.
For example - the forelimbs of the bat and the human have the same structure but different functions.
Hence, the correct answer is mentioned above.
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A solution is made by dissolving 24 g of NaCl to make 475 ml of solution. Calculate the concentration in units of molarity by following these steps: a) Convert the grams of NaCl to moles of NaCl. b) Calculate the liters of solution by dividing the given milliliters by 1000. c) Divide moles by the liters of solution.
Final answer:
The molarity of a solution created by dissolving 24 g of NaCl in 475 mL of water can be calculated by converting the mass to moles, finding the solution's volume in liters, and dividing the moles by the volume. The result is approximately 0.864 M.
Explanation:
To calculate the molarity of a solution in which 24 g of NaCl is dissolved to make 475 mL of solution, follow these steps:
Convert the mass of NaCl to moles using the molar mass of NaCl (58.44 g/mol). To do this, divide the given mass by the molar mass: 24 g ÷ 58.44 g/mol = 0.4106 mol NaCl.Calculate the liters of solution by dividing the volume in milliliters by 1000: 475 mL ÷ 1000 = 0.475 L.To find the molarity, divide the number of moles of NaCl by the volume in liters: 0.4106 mol ÷ 0.475 L = approximately 0.864 molarity.For an equal mass of each substance, which one will require the least amount of heat to raise its temperature from 20°c to 30°c?
If the thorium-232 isotope emits an alpha particle, what would be the atomic number of the resulting atom?
Answer is: atomic number
of resulting atom is 88.
Alpha particle is nucleus of a helium-4 atom, which is made of
two protons and two neutrons.
Nuclear reaction: ²³²Th → ²²⁸Ra + α (alpha
particle).
Alpha decay is radioactive decay in which an atomic nucleus emits an alpha particle (helium nucleus) and transforms into an atom with an atomic number that is reduced by two and mass number that is reduced by four.
When a chemical reaction occurs, the physical and chemical properties of the reactants are the same as the properties of the products. truefalse?
Answer:
False
Explanation:
You definitely won't see this nor need this but the Law of Conservation of Mass states that matter can neither be created nor destroyed in a chemical reaction.
I believe the answer is false
Two clear solutions are placed in separate beakers. The first solution has a pH of 4, and the pH of the second solution is unknown. If the two solutions are mixed and the resulting pH is 5, the second solution must have
The pH of the second solution, given that the mixture of the two solution has a pH of 5, is 4.05
How to calculate the pH of the second solution?
First, we shall obtain the hydogen ion, [tex]H^+[/tex] of the first solution and the mixture solution. Details below:
For first solution:
pH of first solution = 4Hydrogen ion [tex]H^+[/tex] of first solution =?[tex]H^+ = Antilog (-4)\\\\H^+ = 0.0001\ M\\\\[/tex]
For mixture solution:
pH of mixture solution = 5Hydrogen ion [tex]H^+[/tex] of mixture solution =?[tex]H^+ = Antilog (-5)\\\\H^+ = 0.00001\ M\\\\[/tex]
Now, we shall obtain the [tex]H^+[/tex] of the second solution. Details below:
Hydrogen ion [tex]H^+[/tex] of first solution = 0.0001 MHydrogen ion [tex]H^+[/tex] of mixture solution = 0.00001 MHydrogen ion [tex]H^+[/tex] of second solution =?[tex]H^+[/tex] of second solution = [tex]H^+[/tex] of first solution - [tex]H^+[/tex] of mixture solution
= 0.0001 - 0.00001
= 0.00009 M
Finally, we shall calculate the pH of the second solution. Details below:
Hydrogen ion [tex]H^+[/tex] of second solution = 0.00009 MpH of second solution = ?pH = -Log Hydrogen ion [tex]H^+[/tex]
pH = -Log 0.00009
pH = 4.05
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What is the product when Bismuth (symbol Bi, atomic number 83, and radioisotope with a mass number of 214) emits an alpha particle? Give name or symbol of new element, its atomic number, and its mass number for full credit. Show work.
Answer : The correct answer is Name = Thallium (Th) , atomic mass = 210 and atomic number = 81 .
Alpha decay :
When atomic nucleus emits an alpha particle that process is known as alpha particle decay . The symbol of alpha particle is [tex] _2^4He [/tex] , where 4 is atomic mass ( 2 protons + 2 neutrons ) and 2 atomic number .
When alpha particle is released the resultant nuclei (daughter nuclei) have 4 less atomic mass and 2 less atomic number .
Example for nuclear equation of alpha decay can be expressed as:
[tex] ^{230}_{90}Th \rightarrow _2^4He + ^{226}_{88}Ra [/tex]
Given :
Radioisotope = Bi Atomic mass = 214 Atomic number = 83
When it will release alpha particle , atomic mass will be decreased by 4 and atomic number by 2 .
Atomic mass = 214 - 4 = 210 Atomic number = 83-2 = 81
The atom with atomic number 81 is Thallium (Tl) . Hence the daughter nuclei so produced is [tex] ^{210}_{81}Tl [/tex]
The nuclear reaction can be written as :
[tex] ^{214}_{83}Tl \rightarrow ^4_2He + ^{210}_{81}Tl [/tex]
The various components of crude oil are separated in a refinery based on differences in
Crude oil components are separated based on their boiling points using fractional distillation in a refinery.
Explanation:The various components of crude oil are separated in a refinery based on differences in their boiling points. This process, known as fractional distillation, takes advantage of the fact that different compounds in crude oil have different boiling points.
In a refinery, crude oil is heated in a furnace and the vaporized oil is then passed through a tall column called a fractionating column. As the vapor rises through the column, it cools down, and the compounds with higher boiling points condense and are collected at different levels in the column.
For example, at the bottom of the column, heavy compounds like bitumen and fuel oil are collected, while lighter compounds like gasoline and kerosene are collected at higher levels. This allows the refinery to separate and collect various components of crude oil for further processing.
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Scientists have been able to insert genes from bacteria into the DNA of corn plants. This gives some species of corn additional resistance to pests. Why would this breakthrough be beneficial to humans?
A. Farmers will increase their use of chemicals that kill pests.
B.Less chemical residue will be found in the air and water.
C.Bacteria will flourish inside the corn plants.
D.The corn will cause illness in humans or animals.
E.The amount of corn produced per acre of farmland will decrease.
Scientists have been able to insert genes from bacteria into the DNA of corn plants. This gives some species of corn additional resistance to pests.
This would breakthrough be beneficial to humans as " less chemical residue will be found in the air and water"
What is DNA?Deoxyribonucleic acid (DNA) is just a polymer made up of two polynucleotide chains whose coil around with each other to create a double helix which carries genetic instructions including all living things and viruses' formation, function, growth, but also reproduction.
What is chemical residue?The remnants of a chemical or even its decomposition products may remain in or on prepared produce and are referred to as chemical residues. Chemical residues could form as a result of directly processing produce with either a chemical product or as a result of chemical exposure.
Therefore, the correct answer will be option (B).
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Natural gas is primarily composed of ________. natural gas is primarily composed of ________. methane sulfur dioxide nitrogen oxygen nitrite
Natural gas is primarily composed of methane, which is a colorless, odorless, and highly flammable hydrocarbon produced through the natural decomposition of organic materials.
Explanation:Natural gas is primarily composed of methane. Methane, abbreviated as CH4 or carbon tetrahydrate, is a hydrocarbon that is a main component of natural gas. The natural process of decomposition of organic materials in the lack of oxygen forms methane. This gas is colorless, odorless, and highly flammable. Ensuring safety for use in homes, a rotten egg-like smell is often added to it.
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What happens to the density of the core of a high-mass star as it collapses?
which is the next logical step in balancing the given equation? CS2(1)+Cl2(g) CCl4(1) S2Cl2(1)
Scientists have: (Select all that apply.)
a. observed amino acids forming spontaneously
b. demonstrated how amino acids can form from the environment
c. confirmed that the ultimate source of amino acids and proteins is from plants
d. not yet determined the source of amino acids
Suppose you wish to make 0.879 l of 0.250 m silver nitrate by diluting a stock solution of 0.675 m silver nitrate. how many milliliters of the stock solution would you need to use?
Answer is: 325.5 mL of the stock solution.
c₁(AgNO₃) = 0.675 M.
V₂(AgNO₃) = 0.879 L.
c₂(AgNO₃) = 0.250 M.
V₁(AgNO₃) = ?
c₁ -
original concentration of the solution, before it gets diluted.
c₂
- final concentration of the solution, after dilution.
V₁
- volume to
be diluted.
V₂ - final volume after
dilution.
c₁ · V₁ = c₂
· V₂.
V₁(AgNO₃) = c₂ · V₂ ÷ c₁.
V₁(AgNO₃) = 0.250 M · 0.879 L ÷ 0.675 M.
V₁(AgNO₃) = 0.325 L · 1000 mL = 325 mL.
To make 0.879 l of 0.250 m silver nitrate from a 0.675 m stock solution, use the relationship between initial and final concentrations and volumes (M1V1 = M2V2). By substituting the given values and solving for V1, we can find the needed volume of the stock solution in liters and then convert that volume to milliliters by multiplying by 1000.
Explanation:To answer this question, we need to use the formula related to molarity (M = moles/liters), which is M1V1 = M2V2. It is a relationship between the initial concentration (M1) and volume (V1) of stock solution and the final concentration (M2) and volume (V2) of dilute solution.
In this case, the student wishes to make 0.879 l (V2) of 0.250 m (M2) silver nitrate by diluting a stock solution of 0.675 m (M1) silver nitrate. Substituting these values into the formula M1V1 = M2V2, we can find the volume of the stock solution needed (V1).
So, the calculation would be: (0.675 M) V1 = (0.250 M)(0.879 L).
To solve for V1, divide both sides by 0.675 M and the result is: V1 = (0.250 M)(0.879 L) / 0.675 M. This gives the volume of the stock solution you need to use in liters. To convert this to milliliters (since the question asked for the volume in milliliters), multiply by 1000.
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How can the spontaneous redox reaction of a voltaic cell be reversed?
A 20.9 ml sample of 0.267 m koh solution required 29.1 ml of aqueous acetic acid solution in a titration experiment. calculate the molarity of the acetic acid solution. answer in units of m.
What type of intermolecular forces exist between br2 and ccl4?
The intermolecular forces between Br2 and CCl4 are London dispersion forces, as both substances are nonpolar molecules.
Explanation:The intermolecular forces that exist between Br2 and CCl4 are London dispersion forces. These are the weakest type of intermolecular force and exist between all molecules, irrespective of whether they are polar or nonpolar. Br2 and CCl4 both are nonpolar molecules, so they don't exhibit dipole-dipole attractions, which are typically stronger than dispersion forces.
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