The false statement from the above is that: Temporary charge imbalances in the molecules lead to London dispersion forces.
What are the factors that affect London dispersion forces?Generally, the factors which affects the London dispersion forces a dispersion force are as follows:
Shape of the moleculesDistance between moleculesPolarizability of the moleculesHowever, London dispersion forces simply refers to a sort of temporary attractive force formed when electrons in two adjacent atoms occupy positions that make the atoms form dipoles.
So therefore, temporary charge imbalances in the molecules lead to London dispersion forces is a false statement
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Calculate the pH of solution
that has
[H+]of 8.1 x10^-4
Answer:
Explanation:
Calculate the pH of solution
that has
[H+]of 8.1 x10^-4
which of the following has the smallest radius? A, Mg B, Na+ C, Na D, Mg+
Answer:
Na+
Explanation:
it is least pull by the nuclear charge
Answer:
Na+
Explanation:
It is posetively charged and in the first column
Which is the conjugate acid base pair in the following equation.
H 2 SO4+ H20 —> HSO 4 -1 + H3O+1
H2SO4 and HSO4-1
H2SO4-1 and H3O+1
H3O+1 and H2SO4
Answer:
the correct answer is H2SO4 and HSO4-41
12. A voltaic cell consists of a chromium electrode dipped in a 1.20 M chromium (III) nitrate
solution and a tin electrode dipped in a 0.400 M tin (II) nitrate solution. What is the cell
potential at 298 K?
For a voltaic cell consisting of chromium, an electrode dipped in a 1.20 M chromium (III) nitrate solution and a tin electrode dipped in a 0.400 M tin (II) nitrate solution, the cell potential at 298 K is mathematically given as
Ecell = 0.577 V
What is the cell potential at 298 K?Generally, the equation for the Oxidation and Reduction is mathematically given as
Cr(s) ------------------ Cr+3(aq) + 3e- ] x 2 ...O
Sn+2(aq) + 2e- ------------ Sn(s) ] x 3 ...R
Reaction
2 Cr(s) + 3 Sn+2(aq) --------------- 2 Cr+3(aq) + 3 Sn(s)
Therefore
Eicell = - 0.14 - ( - 0.74)
Eicell = 0.60
In conclusion
[tex]Ecell= E0cell - \frac{0.0591}{n} * \frac{log[Cr+3]^2}{ [ Sn+2]^3}[/tex]
[tex]Ecell = 0.60 - \frac{0.0591 }{6} \frac{log( 1.20)^2}{ ( 0.200)^3}[/tex]
Ecell = 0.577 V
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What do the dots within a lewis of a bonded molecule represent?
Take a example of water
A lone pair is present over 0Attached structure
Convert the answer from #7 to kg. Use the correct significant figures.
Answer:
Socratic app
Explanation:
it will help you
How many moles of gas are present in the sample of gas occupies that 4.32 L at 1.45 atm pressure and -18oC? (Include your formula used and the set-up.)
The amount of gas present in the sample which occupied the given volume at the given pressure and temperature is 0.3mol.
Ideal Gas LawThe Ideal gas law states "that pressure multiplied by volume is equal to moles multiply by the universal gas constant multiply by temperature of gas. It is expressed;
[tex]PV = nRT[/tex]
Where P is pressure, V is volume, n is the amount of substance, T is temperature and R is the ideal gas constant( [tex]R = 0.08206 Latm/molK[/tex]
Given the data in the question;
Volume; [tex]V = 4.32L[/tex]
Pressure; [tex]P = 1.45atm[/tex]
Temperature; [tex]T = -18^oC = 255.15K[/tex]
Amount of gas; [tex]n =\ ?[/tex]
To determine the moles of gas, we substitute our given values into the expression above.
[tex]PV = nRT\\\\1.45atm * 4.32L = n * 0.08206Latm/molK * 255.15K\\\\6.264Latm = n * 20.937609Latm/mol\\\\n = \frac{6.264Latm}{20.937609Latm/mol} \\\\n = 0.3mol[/tex]
Therefore, the amount of gas present in the sample which occupied the given volume at the given pressure and temperature is 0.3mol.
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what is the empirical formula of a cpd containing 60.0%of sulfur 40.0% oxygen by mass
Answer:
n S = 60 32 = 1.875 , n_S=\tfrac{60}{32}=1.875, nS=3260=1.875, n O = 40 16 = 2.5.
Explanation:
Are ionisation energy and electron affinity opposite phenomenal? Explain.Explain the observed discontinuities in ionisation energy periodicities.
Both ionization energy and electron affinity are opposite processes to each other because of their functions.
What is the diifference between ionization energy and electron affinity?The main difference between electron affinity and ionization energy is that electron affinity refers to the amount of energy released when an atom gains an electron while on the other hand, ionization energy is the amount of energy required to remove an outermost electron from an atom.
So we can conclude that both ionization energy and electron affinity are opposite processes to each other because of their functions.
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Which part of the water cycle helps to cool the temperature the most?
runoff
infiltration
rainfall
evaporation ( Science )
A science teacher asked her students to calculate the density of a toy cube. The mass of the cube was 120 grams and the height of the cube was 4 centimeters.
What was the density of the cube in cubic centimeters? (**At least 2 decimal places)
Explanation:
density=> ro=m/V
m=0,12kg
V=0,04m³=6,4.10^-5
=>0,12/6,4.10^-5=1875 kg/m³
2. Which substance has definite volume and weight, but not a definite
shape?
B
A. ice
wood
C. gasoline
D. steam
Answer:
A solid has definite volume and shape, a liquid has a definite volume but no definite shape, and a gas has neither a definite volume nor shape. The change from solid to liquid usually does not significantly change the volume of a substance
Explanation:
no explanation
2C6H6 + 1502 →12CO2 + 6H20
Calculate the number of moles of C6H6 needed to produce 50.0g of water.
Show steps
Answer:
.926 moles
Explanation:
Rounding :
H2 0 = 18 gm/mole
50 gm would then be 50 / 18 = 2.7777 moles of water
every two moles of 2 C6H6 produces 6 moles of water
2.7777/6 * 2 = .926 moles
How many grams are in 4.25 moles of NiS?
Answer:
386.75 grams
Explanation:
You can use dimensional analysis to help you solve for this question
1. set up a proportion
x grams
4.25 mol x x mole
2. to find the amount of grams/mol that are in NiS we find the gram formula mass (mass of all the atomic masses of each element)
Ni- 59 grams
S- 32 grams
add these together and you get 91 g/mol
3. now plug in the values and multiply across
91 grams
4.25 mol x 1 mole
when you multiply across this is equal to 386.75 grams
A rubber ball is held 4.0 m above a concave spherical mirror with a radius of curvature of 1.5 m. At time equals zero, the ball is dropped from rest and falls along the principal axis of the mirror. How much time elapses before the ball and its image are at the same location?
The time elapsed when the ball placed above the concave mirror and the image formed would be at the same location is 0.55 s.
Image distanceThe position of the image formed is determined using the followimg mirror formula;
[tex]\frac{1}{f} = \frac{1}{v} + \frac{1}{u}[/tex]
where;
f is the focal length of the mirrorv is the image distanceu is the object distancef = R/2
f = 1.5/2
f = 0.75 m
When the ball and its image is in the same position, u = v
The position of the ball is calculated as;
[tex]\frac{1}{f} = \frac{1}{u} + \frac{1}{u} \\\\\frac{1}{f} = \frac{2}{u} \\\\u = 2f\\\\u = 2(0.75)\\\\u = 1.5 \ m[/tex]
Time of motion of the ballThe time taken for the ball to travel the caluclated distance is determined as;
h = ut + ¹/₂gt²
1.5 = 0 + ¹/₂(9.8)t²
1.5 = 4.9t²
t² = 1.5/4.9
t² = 0.306
t = 0.55 s
Thus, the time elapsed when the ball and its image are at the same location is 0.55 s.
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The wet adiabatic lapse rate (or saturated adiabatic lapse rate) varies with temperature, is 0.5°C/100 m (5°C/km or 3.3°F/1,000 ft), and happens when the air is completely __________ with water vapor at its dew point.
This happens when the air is completely Saturated with water vapor at its dew point
What is wet adiabatic lapse rate ?Wet adiabatic lapse rate is the rate at which a saturated wet air cools down with increase in altitude through an adiabatic process. This is process is also known as saturated adiabatic lapse rate.
Hence we can conclude that This happens when the air is completely Saturated with water vapor at its dew point.
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Answer: saturated
Explanation:
The atomic weight of nitrogen is what ?
Explanation:
[tex]\longmapsto\: \green{ hello \: mate \: }[/tex]
Atomic weight of nitrogen is 23
Explain your reasoning for your formula prediction for Ba+2 and S-2. A neutral molecule requires equal numbers of cations and anions. Atoms will not combine unless their ions have an equal but opposite charge. The total charge of cations plus anions must equal zero. all of the above
Answer:
BaS would be a stable neutral molecule!
Reason:- All of the above.
Explanation:
In order to form a neutral molecule it's necessary to balance their charge first, The given components i.e. Ba2+(cation) and S2-(anion) have equal and opposite charges, when they combine they form predominantly ionic compound i.e. Sulphur partly shares it's 2 electrons with Barium and forms Barium sulphide.
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What are two relatively unique physical properties of water? What impact do these properties have on life on Earth?
Answer:
Polar molecule. A neutral, or uncharged molecule that has an asymmetric internal distribution of charge, leading to partially positive and partially negative regions
Cohesion The attraction of molecules for other molecules of the same kind
Adhesion The attraction of molecules for other molecules of a different kind
Density The mass per unit volume of a substance
Specific heat capacity The amount of heat needed to raise the temperature of one gram of a substance by one degree Celsius
Heat of vaporization The amount of energy needed to change one gram of a liquid substance to a gas at constant temperature
Polar substance. a molecule that is neutral or uncharged but has an asymmetric internal charge distribution that produces both positive and negative regions.
What are Physical properties ?Cohesion molecules' attraction to other molecules of the same sort. Adhesion the pull of certain molecules toward others of a different type
Density a substance's mass per unit volume particular heat capacity The amount of heat required to increase a substance's temperature by one degree Celsius in one gram
Vaporization-related heat energy required to convert one gram of a liquid material into a gas at a fixed temperature.
Therefore, Polar substance. a molecule that is neutral or uncharged but has an asymmetric internal charge distribution that produces both positive and negative regions.
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HELP ME OUT PLS!!!!!!!!!!!!!
I. Car metal rusting slowly for a year.
II. Condensation of water vapor on a mirror during a 5-minute shower.
III. The formation of a precipitate in a test tube during a 10-second reaction.
IV. The oxidation of copper on the Statue of Liberty for more than 100 years.
23) Which of the processes above are examples of a chemical reaction?
A) I and II
B) III and IV
C) I, II, and III
D) I, III, and IV
Answer:
d) I, III, and IV
Explanation:
rust, copper oxidation, and percipitate from a chemical reaction are all, well, chemical reactions.
I need help it’s calculating ph
The measurement 0.41006 gram, rounded to four significant figures, is expressed as... 1) 0.4100 g
2) 0.410 g
3) 0.41 g
4) 0.4101 g
Answer:
option B = 0.410 g
Explanation:
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When .080 moles of propane burn at STP, what volume of carbon dioxide is produced?
The answer is 5.4 L (I NEED THE STEPS)
Taking into account the reaction stoichiometry and the definition of STP, 5.4 L of carbon dioxide is produced.
Reaction stoichiometryIn first place, the balanced reaction is:
C₃H₈ + 5 O₂ → 3 CO₂ + 4 H₂O
By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:
C₃H₈: 1 mole O₂: 5 moles CO₂: 3 moles H₂O: 4 molesMoles of CO₂ formedThe following rule of three can be applied: if by reaction stoichiometry 1 mole of C₃H₈ form 3 moles of CO₂, 0.080 moles of C₃H₈ form how many moles of CO₂?
[tex]amount of moles of CO_{2} =\frac{0.080 moles of C_{3} H_{8}x3 moles of CO_{2} }{1 mole of C_{3} H_{8} }[/tex]
amount of moles of CO₂= 0.24 moles
Definition of STP conditionThe STP conditions refer to the standard temperature and pressure. Pressure values at 1 atmosphere and temperature at 0 ° C are used and are reference values for gases. And in these conditions 1 mole of any gas occupies an approximate volume of 22.4 liters.
Volume of CO₂ producedYou can apply the following rule of three: If by definition of STP 1 mole of CO₂ occupies 22.4 L, 0.24 moles of CO₂ how much volume does it occupy?
[tex]volume of CO_{2} =\frac{0.24 molesx22.4 L}{1 mole}[/tex]
volume of CO₂= 5.376 L ≅ 5.4 L
Finally, 5.4 L of carbon dioxide is produced.
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STP conditions:
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pls help me with this
Answer:
silver
5/20
=0.25.................
Answer:
C
Explanation:
Aluminum density = 0.5
Iron density = 2
Gold density = 1
Silver density = 0.25
The smallest value is 0.25 hence silver has less density.
Thermal energy always moves from a greater energy level to a lesser energy level
Theory or law?
Give an explanation please
Answer:
[tex]\fbox{Law -Based \: on \: laws \: of \: thermodynamic}[/tex]
Explanation:
At constant pressure Thermal energy always moves from a greater energy level to a lesser energy level, laws of thermodynamics prove that.
Nature always likes to attain equilibrium either it's movement of heat energy or flow of water from higher region to lower region. The first and second law of thermodynamics are profe of that, the first law says that the total energy of universe is Constant. Energy can not be destroyed it always changes from one form to another, by work and heat. The second law explains why thermal energy moves from a greater energy level to a lesser energy level, it deals with the change in entropy of a system and surrounding and states heat flows from hot environment to cold environment.
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Which statement best summarizes the way the sun produces energy?
A. Combustion reactions in the sun release large amounts of chemical energy.
B. Fusion reactions in the sun release large amounts of chemical energy.
C. Combustion reactions in the sun convert small amounts of matter into large amounts of energy.
D. Fusion reactions in the sun convert small amounts of matter into large amounts of energy.
Answer: D. Fusion reactions in the sun convert small amounts of mayter into large amounts of energy.
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Wetlands filter and clean water flowing through them. In the system shown in the diagram, the wetland cleans water entering the ocean by which means?
A: Run-off
B: Precipitation
C: Evaporation
D: Condensation
Answer:
im guessing its A run off
Explanation:
Answer: Run off
Explanation:
Wetlands have plants that clean water through. As water flows into a wetland it encounters the the plants growing there. This slows the water down making it less likely to cause erosion. The nutrient pollutants nitrogen and phosphorus are absorbed by the roots of the plants.
What is a calcite?
1. mineral
2. erosion
3. marble
4. aragonite
I had no idea what subject I have to put it on. 0_0
HELP ASAP
Answer: 1. Mineral
Explanation:
Calcite is a "white or colorless mineral consisting of calcium carbonate" (Oxford Languages).
By this definition, the answer to your question is option 1.
The image attached is from geology.com and is a picture of calcite.
what mass of water must be added to 0.50 mol of glucose to make a solution of 25 percent by mass? the molar mass of glucose is 180 g/mol. SHOW WORK PLSS.
Answer:
270 g of water
Explanation:
Becquerel placed photographic paper in a drawer with some radioactive rocks and discovered that the amount of exposure on the paper was proportional to the amount of uranium that was present in the rocks. True False
Becquerel did not discover that the amount of exposure on the paper was proportional to the amount of uranium that was present in the rocks
What is radioactivity?The phenomenon of radioactivity was discovered by the French scientist Henri Becquerel in 1896 when he placed photographic paper in a drawer with some radioactive rocks.
We have to note that Becquerel did not discover that the amount of exposure on the paper was proportional to the amount of uranium that was present in the rocks hence the stetement is false.
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