The compounds with high Intermolecular forces , will result in the highest melting point.
What is Melting Point ?The temperature at which the solid and liquid form of a solvent are in equilibrium and applying any more heat will lead to melting of the solid into liquid is called Melting Point.
The Intermolecular force that would result in highest melting point is the Ion-Ion interaction , the more the bonding the higher will be the melting point.
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using are organic compounds made by living things
Answer:
The chemical compounds of living things are known as organic compound because of their association with organisms and because they are carbon-containing compounds, which are the compounds associated with life processes, are the subject matter of organic chemistry
What is the mass number of an isotope with an atomic number of 57 and that has 69 neutrons?
Answer:
mass number=126
Explanation:
57+69=126
Emmett is lifting a box vertically. Which forces are necessary for calculating the total force?
Fp, Ff, and Fg
Fp and FN
Fp, FN, and Ff
Fp and Fg
Emmett is lifting a box vertically. The forces that are necessary for calculating the total force is Fp and Fg. The correct option is D.
What is force?Force is an influence or strength that is used to initiate an action or movement. There are total eight types of forces are present.
Fp is the applied force and Fg is the force of gravitation, if Emmett is lifting a box vertically, these force will be applied
Thus, the correct option is D, Fp and Fg.
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Answer:
D
Explanation:
Edge 2022
The vapour pressure of water 12.3kPa at 300K. Calculate the vapour pressure of 1 molal solution of a non-volatile solute in it.
Answer:
ywhehehehehdgdudcdudcd uy dshdcvv
Explanation:
bdbdkzkzjzdkdkzdvdisisksjskakskskzbx vxydcdudschahahbshshs
Which of the following lists electromagnetic radiations from lowest to highest energy?
Your answer:
radio waves, microwaves, ultraviolet radiation, visible light
microwaves, radio waves, visible light, X-rays
radio waves, infrared radiation, visible light, ultraviolet radiation
gamma radiation, infrared radiation, visible light, X-rays
Answer:
Highest wavelength : radio waves
So lowest energy: radio waves
Hence order is:
radio waves < microwaves < IR waves < visible light < ultraviolet radiation < X-rays < gamma rays
Which is a characteristic of nuclear fission?
A sample of radioactive waste has a half-live of 40 years and an activity level of 4 curies. After how many years will the activity level of this sample be 0. 5 curies?
After 160 years, the activity level of the sample will be 0.5 curies.
What is half-life?Half life of any radioactive waste is the half decay of that product.
The formula is [tex]\dfrac{\lambda }{\lambda_1} = 2^\dfrac{a}{b}[/tex]
Where, λ is 4 cruies
λ1 is 0.5 cruies
b = 40 years
Putting the values in the equation
[tex]\dfrac{4}{0.5} = 2^\dfrac{a}{40}\\\\\\\dfrac{a}{40} = 4\\ = 160 years[/tex]
Thus, the correct option is 160 years.
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What is the percentage by volume of 30.0 mL ethanol (C2H6O) dissolved in 150.0 mL water (H2O)?
16.7 %
20 %
83.3 %
15 %
Answer: 16.7 %
Explanation:
[tex]\frac{30.0}{150.0+30.0}=\boxed{16.7\%}[/tex]
31. calculate the amount of energy released as heat by the freezing of 13.3 g of a liquid substance, given that the substance has a molar mass of 82.9 g/mol and a molar enthalpy of fusion of 4.60 kj/mol.
From the calculations, the heat of fusion of the substance is 0.73 kJ
What is is the heat of freezing?The heat of freezing is the energy released when the substance is converted from liquid to solid.
Now we know that the molar mass of the substance is 82.9 g/mol hence the number of moles of the substance is; 13.3 g /82.9 g/mol = 0.16 moles
Now the heat of fusion shall be;
H = 4.60 kj/mol * 0.16 moles
H = 0.73 kJ
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right 9 in a equation
Answer:
x+y = 12
Explanation:
shfb gfgjj ghjj dvgg ggggg ghggs ufac t g dgyyh
Suppose that 5-ml containers of helium (He), neon (Ne), and argon (Ar) are at pressures of 1 atm,
2 atm, and 3 atm, respectively. The He and Ne are then added to the container of Ar.
a. What is the partial pressure of He in the container after the three gases are mixed?
b. What is the total pressure in the container after the three gases are mixed?
The total pressure in the container after the three gases are mixed is 6 atm and the partial pressure of He is 1 atm.
What is Dalton's Law of Partial Pressure ?According to Dalton's Law of Partial Pressure , the pressure exerted by a mixture of gas is equal to the sum of the partial pressure of the gases in the mixture.
P(total) = p₁ +p₂+p₃+.....
As the volume of the containers are same and the
n = 1*5/RT for Helium
n = 2*5 /RT for Neon
n= 3*5/RT for Argon
Mole fraction = moles of the element/Total moles
Moles fraction of Helium is
[tex]\rm \dfrac{1*5}{1*5+2*5+3*5}[/tex]
= 1/6
Total Pressure in the container = 1 + 2 +3 = 6 atm
The partial pressure of Helium will be
=Mole fraction * Total pressure
=(1/6)*6 atm
= 1 atm , as the volume is same the temperature is same , the pressure will also be same.
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Generally, what is the effect of increased temperature on the rate of dissolution of a solid solute?
Answer:
Increases
Explanation:
The general effect we see as temperature increases is that rate of dissolution of a solid solute increases,
Therefore, we can say that :
Temperature ∝ Rate of dissolution
What happens when an electron absorbs photons? OA. It changes into a neutron and falls into the nucleus. B. It moves to a higher energy level. OC. It changes into an alpha particle and is ejected from the atom. OD. It falls to a lower energy level.
When an electron absorbs photons it moves to a higher energy level.
What happens when an electron absorbs photons?
Absorption of photons occurs when electrons in a given state absorb photons which causes them to gain energy and jump to higher energy levels.
The electrons will move to higher energy level because they have acquired more energy.
Thus, when an electron absorbs photons it moves to a higher energy level.
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Calculate the temperature change of copper metal that has a mass of 43.2 g and is allowed to absorb 1,345 J of heat. The specific heat capacity of copper is 0.385 J/°c g.
Answer: 80.9 K
Explanation:
[tex]Q=mc \Delta T\\\\1345=(43.2)(0.385) \Delta T\\\\\Delta T=\frac{1345}{(43.2)(0.385)} \approx \boxed{80.9 \text{ K}}[/tex]
Including soluble fiber into your diet can __________.
A. digest amino acids
B. digest cellulose
C. raise cholesterol levels
D. lower cholesterol levels
Answer:
The answer is D.
Explanation:
Including soluble fiber into your diet can lower cholesterol levels.
Could someone help me with this please
Answer:Your can use the internet There is a web site that is called periodic table.com it is very use full
Explanation:Have fun
A gas at STP is heated to 35 degrees
C. What is the new pressure of the gas?
A gas at STP is heated to 35 degree C. The new pressure will be 2.41 atm.
What is Gay-Lussac law?The pressure of the mass of the gas is directly proportional; to the temperature of the gas.
[tex]\dfrac{P_1 }{T_1} =\dfrac{P_2}{T_2}[/tex]
Converting the temperature into kelvin
The initial temperature = 35 °C = 35 + 273 K= 308 K
The final temperature = 50 °C =50 + 273 K = 323 K
Initial pressure = 2.3 atm
Final pressure ?
Putting the values in the equation
[tex]\dfrac{P_1 }{T_1} =\dfrac{P_2}{T_2}\\\\\\{P_2 = \dfrac{P_1 \times T_2}{T_1} \\\\\\\\\\{P_2 = \dfrac{2.3 \times 323 }{308} = 2.41 atm.[/tex]
Thus, the new pressure will be 2.41 atm.
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At what temperature would 0.46 moles of a gas occupy 13.3 L if the pressure is 734 mm Hg?
Answer: 341.6k
Explanation:
R= 0.0821
n= 0.46moles
v= 13.3L
p= 734mmhg = 734/760 = 0.97
[tex]T = \frac{p*v}{n*R}[/tex]
[tex]T = \frac{0.97*13.3}{0.46*0.0821}[/tex]
T= 341.6k
Answer:
10100101
Explanation:
this is for the other person alt.
2)a dish contains a blackish-yellow powder.when a magnet is moved over it black particles iron get stuck to the magnet and only yellow powder which is sulphur is left behind. was your original powder an element compound or mixture
Match the following terms:
Answer:
See below ~
Explanation:
A to B
⇒ Solid Phase
==========================================================
B to C
⇒ Melting
==========================================================
C to D
⇒ Liquid Phase
==========================================================
D to E
⇒ Vaporizing
============================================================
E to F and beyond
⇒ Gas Phase
How many moles of Unknown weak acid (HA) in a 100L solution are required to produce a solution with PH =2 ? Ka of the Unknown weak acid (HA)=5x10⁻³
a. 3x10⁻³
b. 0.3x10⁻³
c. 3
d. 0.3
The moles of unknown weak acid (HA) in a 100L solution are required to produce a solution with pH 2 is 0.002 moles.
What is the equation of the acid dissociation constant, Ka?The acid dissociation constant of an acid is given by the formula below:
[tex]K_a= \frac{[A^{-}][H_3O^{-}]}{[HA]}[/tex]
Where
Ka = 5x10⁻³ pH = 2[H3O+] = 10^-2Volume of solution = 100 mL or 0.1 LSince, the Ka is given at equilibrium concentrations, [H3O+] = [A-]
[A-] = 10^-2
Making [HA] subject of the formula:
[tex][HA]= \frac{[10^{-2}][10^{-2}]}{5 \times 10^{ - 3} } = 0.02[/tex]
Moles of acid = 0.1 × 0.02 = 0.002 moles
Therefore, the moles of unknown weak acid (HA) in a 100L solution are required to produce a solution with pH 2 is 0.002 moles.
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HELP ASAP PLEASE
The primary cause of water pollution is:
Answer:
the aNSWRER TOP UR QUESTION IS THAT I NMEED TO ANSWER THIS SO I DONT HAVE TO WQATCH ADS LOL
Explanation:
DSADSDASDASDASDSDSDSDSDS and i knowq chem is bio chwem is
Can anyone please help me find molar masses of compounds. For example Copper (ll) sulfate (CuSO4)
Answer:
Explanation:
You would have to add up the atomic masses of all the compounds in the compound, making sure you include how many molecules of each are in the compound
For example, in CuSOA we have 1 molecule of Cu and S, as 4 molecules of O
The atomic masses are as follows:
Cu = 63.55 u
S = 32.065 u
O = 15.99 units
This is how we would add it up:
(Atomic mass of Cu) + (Atomic mass of S) + 4(Atomic Mass of O)
(63.55) + (32.065) + 4(15.99)
(63.55) + (32.065) + 63.96
= 159.575 u
According to the postulates of kinetic molecular theory, which statement describes the movement of the particles of a liquid?
According to the postulates of kinetic molecular theory, the particles of a liquid are close together and are in constant random motion.
What is the Kinetic theory of matter?The Kinetic theory of matter states that all forms of matter are made up of tiny particles which possess kinetic energy and are in constant state of motion.
The strength of the forces keeping the particles together determines the state in which that substance exists in.
For liquids, the intermolecular forces of attraction between between the molecules are not very strong, and as such, the particles of a liquid are in constant state of random motion.
Therefore, according to the postulates of kinetic molecular theory, the particles of a liquid are close together and are in constant random motion.
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Need help ASAP!
How many moles of gas does it take to occupy 520 mL at a pressure of 400 torr and a temperature of 340 K? Use the conversion factors 760 torr = 101.3 kPa and 1 mL = 0.001 L. Show all of your work.
Answer: B - 0.0098 moles
Explanation:
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Is industry pool or flux
Answer:
What is the difference between pools and fluxes?
Image result for Is industry pool or flux
Fluxes describe the movement of energy and matter between different pools. When you pour a glass of juice for yourself, the juice bottle and the glass are both “pools” for the apple juice. The act of pouring it from the bottle to the glass is the flux
Explanation:
There are 75.0 g of glucose (molar mass = 180 g/mol) dissolved in 250 mL of solution. What is the molarity of this solution?
A. 0.416 M
B. 1.70 M
C. 2.13 M
D. 3.31 M
Answer:
5.6 m which is molarith this solution
A sample of helium gas has a volume of 6.50l at a pressure of 845 mmhg and a temperature of 25oc. what is the pressure of the gas in atm when the volume and temperature of the gas sample are changed to 1850 ml and 325 k
Answer:
4.25atm
Explanation:
[tex]\frac{P1V1}{T1}\\[/tex]=[tex]\frac{P2V2}{T2}[/tex]
where ,
p1 =845/760=1.11atm
v1=6.50l
t1=25c +273k=298k
p2=?
v2=1850/1000=1.85l
t2=325k
so answer is 4.25 atm
A wave is created by causing vibrations in particles of matter. Which
statement about the wave is true?
The wave which is created by causing vibrations in particles of matter is a mechanical wave.
What is a wave?A wave is a disturbance in a medium which transmits transmits energy from one point to another without a permanent displacement of the particles of the medium.
Types of waves include:
electromagnetic wavesmechanical wavesMechanical waves are waves which are produced as a result of the vibrations of the particles of the medium.
Therefore, the wave which is created by causing vibrations in particles of matter is a mechanical wave.
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Find an example of an ester used as a fragrance or flavoring and give the name, condensed structural formula, and flavor of your chosen ester.
The example of an ester used as a fragrance is isopentyl acetate and it is present in banana. Details about esters can be found below.
What are esters?Esters are compounds most often formed by the condensation of an alcohol and an acid and has the functional group carbon-oxygen double bond joined via carbon to another oxygen atom.
Esters are naturally found in certain fruits and can be used as major constituent of perfumes. An example of ester used as fragrance is isopentyl acetate.
Isopentyl acetate has the molecular formula of C7H14O2 and has a banana flavor.
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