calculate the force of attraction in n between a cation with a valence of 2 and an anion with a valence of 3 the centers of which are separated by a distance of 6.9 nm
The force of attraction in between a cation with a valence of 2 and an anion with a valence of 3 would be 1.5 x [tex]10^{-10}[/tex] N.
Force of attractionAccording to Coulomb's law constant,
k = 9 x 10^9 Nm^2/C^2
The magnitude of the charge of an electron is
e= 1.6 x 10^9 C
The magnitude of the electric force (F) between the cation and the anion is given by
F = k Q^2/d^2
= k 2e^2/d^2
= (9 x 10^9 Nm^2/C^2) x 10^9 x {2x (1.6 x 10^-19)^2}/ (2.5)^2
= 1.5 x 10^-10 N
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Which item can only be observed using some kind of instrument?
1.heat from the Sun
2.the planet Venus
3.a radio signal
4.an earthquake
Why is an acid able to produce ions in aqueous solution? assume that the general formula of an acid is given by ha, where a is usually a halogen or oxygen atom.
Acids separate into ions in water or other aqueous solutions. These are in charge of how electricity conducts through them. In the absence of water, acids do not dissociate hydrogen ions. We can therefore state that acids exclusively create ions in watery solutions.
The polar H-A bond breaks due to the attraction between H and the O of water
An aqueous solution is one in which water serves as the solvent. Chemical equations typically illustrate it by adding (aq) to the appropriate chemical formula. For instance, Na +(aq) + Cl might be used to indicate a solution of table salt, or sodium chloride (NaCl), in water (aq).
Aqueous solutions are those in which water serves as the solvent. Even though water is a great solvent, not everything readily dissolves in it.
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calculate amount of tin and mass percentage
Amount of tin in the sample is 2.2837 gm and its mass percentage in the rock is 22.837%
I₃⁻ (aq) + Sn⁺² (aq) → Sn⁺⁴ (aq) + 3I⁻
1 mol 1 mol
mol of NaI₃ = 34.60 mL × 1 L / 1000 mL × 0.5560 mol / L
= 19.2376 × 10⁻³ mol
∵ 1 mol of Sn²⁺ = 1 mol of I₃⁻
∴ mol of Sn²⁺ = 19.2376 × 10⁻³
∴ mass of Sn in sample = mol of Sn²⁺ × molar mass
= ( 19.2376 × 10⁻³ mol ) × 118.71 gm/mol
= 2.28369 gm
= 2.2837 gm
∴ % of tin in sample = (mass of tin) / (mass of sample ) × 100
The mass percent of a solution is defined as the ratio of the mass of solute that is present in a solution, relative to the mass of the solution
= 2.2837/10 × 100
= 22.837 %
Thus we can conclude that amount of tin in the sample is 2.2837 gm and its mass percentage in the rock is 22.837%
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I in Ca(IO3)2 is ?
Answer
And workout
Ca(IO3)2 is Calcium iodate
I in Ca(IO3)2 is Iodate.
The oxidation number of O in Ca(IO3)2 is -2. The oxidation number of I in Ca(IO3)2 is +5. The oxidation number of Ca in Ca(IO3)2 is +2. The oxidation state is the atom's charge after ionic approximation of its bonds. The oxidation number of H is +1 when combined with more electronegative elements (e.g. non-metals) it is -1 in when combined with less electronegative elements (e.g. metals).
Calcium iodates are inorganic compound composed of calcium and iodate anion. Two forms are known, anhydrous Ca(IO3)2 and the monohydrate Ca(IO3)2(H2O).
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Consider the reaction, h2 i2 => 2 hi , which is found to be half order in i2 and first order in h2. which step of the proposed mechanism must be slow in order to agree with this rate law?
3rd step of the proposed mechanism must be slow in order to agree with this rate law in the reaction, h2 i2 => 2 hi , which is found to be half order in i2 and first order in h2.
What is hydrogen?Having the atomic number 1 and the letter H, hydrogen is the first chemical element. The lightest substance is hydrogen. Hydrogen has the formula H2 and exists as a gas under normal conditions. It burns easily and is non-toxic, tasteless, colorless, odorless, and odorless.
With approximately 75% of all normal matter made up of hydrogen, it is the most prevalent chemical in the universe. The majority of hydrogen in plasma stars like the Sun is hydrogen. Water and organic compounds are two examples of molecules that contain the majority of the hydrogen that exists on Earth.
One proton, one electron, and no neutrons are present in each atom of the most prevalent isotope of hydrogen (symbol 1H).
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Full question
Consider the reaction, H2 + I2 => 2 HI , which is found to be first order in I2 and first order in H2. Which step of the proposed mechanism must be slow in order to agree with this rate law?
I 2 => 2 I
I + H2 => H2I
H2I + I => 2 HI
1. 2
2. 3
3. 1
4. Either 2 or 3
Four transmembrane regions changes conformation as gaba binds. which system is this process describing?
Ligand-gated ion channel is this process describing four transmembrane regions changes conformation as Gaba binds.
What are Gaba?In addition to being a ligand-gated ion channel, the [tex]GABA_A[/tex] receptor ( [tex]GABA_A[/tex] R) is an ionotropic receptor. Aminobutyric acid (GABA), the main inhibitory neurotransmitter in the central nervous system, is its endogenous ligand.
The postsynaptic cell's [tex]GABA_A[/tex] receptor opens up to chloride ions (Cl) and, to a lesser extent, bicarbonate ions (HCO3); this selective permeability is known as the [tex]GABA_A[/tex] receptor.
Depending on the membrane potential and the differential in ionic concentration, this may cause ionic fluxes across the pore. When the receptor is active, Cl will flow into the cell if the membrane potential is greater than the equilibrium potential, sometimes referred to as the reverse potential, for chloride ions.
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The road is 6 kilometers long. How
long is the road in meters?
Answer: It is 6000 meters
Explanation:
You multiply the length value by 1000
the volume of water in a 100 ml graduated cylinder was recorded by several student in a group. their recorded volumes are similar, but vary by 0.01 ml
The volume of water in a 100ml graduated cylinder was recorded by several students in a group . thier recorded volumes are similar , but vary by 0.01 ml , this variation shows the uncertainty in measurements.
Uncertainty is defined as the quantification of the doubt about the measurement result. Error is the difference between a measurement result and the measured value and uncertainty describes the reliability of assertion that stated measurement result represents value of measured.
The marking on a 100 ml of graduated cylinder are every 1 ml . so the volume can be measured to the accuracy of ±0.01 ml .
Thus,The volume of water in a 100ml graduated cylinder was recorded by several students in a group . thier recorded volumes are similar , but vary by 0.01 ml , this variation shows the uncertainty in measurements.
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Explain the meaning of crude oil and petro chemicals
Crude oil is a mixture of hydrocarbons whereas Petrochemicals are made primarily from hydrocarbons but also from other chemical substances.
A mixture of hydrocarbons known as crude oil is one that is found in naturally occurring subsurface reservoirs in the liquid phase and continues to be liquid at atmospheric pressure after passing through surface separating equipment.Heating oils, gasoline, diesel, and jet fuels, lubricants, ethane, propane, and butane, as well as numerous other products utilised for their energy or chemical content, are all produced from crude oil through refinement.Crude oil is among the most significant fuel sources globally and historically made for more than a third of the world's energy use.Chemicals derived from petroleum and crude oil are known as petrochemicals.Olefins and aromatics are two categories for petrochemicals, which are substances made from petroleum.Products made from petrochemicals range in complexity from explosives to something as basic as plastic carry bags.Learn more about hydrocarbons here:
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a student practicing for cross country meet runs 250 m in 30 s . what is her avarge speed
Answer:
8 1/3 m per second
Explanation:
You divide 250 by 30
Methane, ch4, is the gas commonly found in labs to fuel bunsen burners. A) how many moles of methane are there in a 7. 21 gram sample?
Using the molar mass of methane, there are 0.45 mole of methane in a 7.21 gram sample.
Molar mass is defined as the mass per unit mole of a substance.
MM = m/n
where MM = molar mass
m = mass
n = number of moles
The molar mass of methane is the sum of the molar masses of each element.
C : 12.011
H : 1.00784
CH4 : 12.011 + 4(1.00784) = 16.04236 g/mol
If a sample of methane has a mass of 7.21 grams, using the formula for the molar mass, solve for the number of moles.
MM = m/n
16.04236 g/mol = 7.21 g/n
n = 7.21 g/16.04236 g/mol
n = 0.4494351205 mol
n = 0.45 mol
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Complete the following word equations
Magnesium + water
Answer:
Magnesium reacts with hot water or water vapour to form Magnesium hydroxide and hydrogen gas.
Explanation:
1. Based on our lab to find the volume of objects, which object had the greatest volume?
The cube, rectangular prism, cylinder, cone, pyramid, and sphere are the fundamental geometric shapes for which volume formulas are known.
Which object had the largest volume?An object's volume is the amount of space it occupies. Cubic meters are used to measure large volumes (m3). Cubic centimeters (cm3) or cubic millimeters are used to measure smaller volumes (mm3). For instance, a cup is said to have a 100 ml capacity if its brim can carry 100 ml of water used to describe volume. The 3-dimensional space inhabited by matter or encircled by a surface is measured by its volume.
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When purified cytochrome oxidase is exposed to cyanide, the cyanide binds reversibly and with high affinity to the enzyme’s active site. What will be the likely outcome if mitochondria are exposed to high levels of cyanide?.
The likely outcome if mitochondria are exposed to high levels of cyanide will be that the cyanide will prevent movement of electrons along the electron transport chain.
The majority of the chemical energy required to drive a cell's metabolic operations is produced by mitochondria, which are membrane-bound cell organelles (mitochondrion, singular). Adenosine triphosphate, a tiny molecule, serves as a storage container for the chemical energy generated by the mitochondria (ATP).
More than 90% of the energy in your body's cells is produced by mitochondria, which act as batteries in the cells. In high-energy-demanding organs including your heart, liver, muscles, and brain, mitochondria play a critical role. Mitochondria make about 25% of liver cells and 40% of heart muscle cells, respectively.
The unique compartments (organelles) in human cells called mitochondria are well recognised for acting as energy producers by disassembling food molecules and producing ATP, a fuel for the remainder of the cell
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The complete question is ''When purified cytochrome oxidase is exposed to cyanide, the cyanide binds reversibly and with high affinity to the enzyme's active site. What will be the likely outcome if mitochondria are exposed to high levels of cyanide?
A. The cyanide will prevent movement of electrons along the electron transport chain.
B. The cyanide will block movement of protons across the inner mitochondrial membrane.
C. The cyanide will inhibit transfer of electrons from NADH to initiate electron transport.
D. The cyanide will prevent oxygen from reaching the mitochondrial matrix.
Phosphorous exists in many different solid forms. Two common forms of phosphorous are red and white phosphorous. Which new vocabulary term describes the fact that phosphorous exists in two or more forms?
The term is Allotropy
Which means that an element can exist in two or more forms with the same physical state but different structures
Tough Tusion. 6. Consider the fission of uranium-235.
a. The fission of uranium-235 begins with the addition of a neutron to the nucleus. What isotope is formed? Give the isotope symbol.
b. After the neutron is added, the uranium atom is more unstable and undergoes fission. A possible set of products is krypton-94, barium-139, and 3 neutrons. How many protons are in these products?
c. Were any protons lost?
Uranium -236 (U-236) and the protons that are contained in the products are; krypton-36 and barium-56.
What is a fission reaction?The term fission refers to the process in which the nucleus of a larger element is bombarded with a small particle such as a neutron which causes the nucleus to become split. As the nucleus is split, smaller nuclei are able to be formed and this leads to the release of a tremendous amount of energy.
It should be known that fission reaction is one of the ways in which energy is released on a massive scale. While, it s true that fission reactions could be deployed on the negative scale such as in the production of the fission bombs, we should also know that it could be used positively to generate electricity in nuclear power plants.
The equation of the fission of uranium-235 begins with the addition of a neutron to the nucleus. What is then formed is uranium -236 (U-236). The protons that are contained in the products are; krypton-36 and barium-56.
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Explain why one redwood tree has almost the same density as a whole forest of redwood trees.
The density of one redwood tree has almost the same density as a whole forest of redwood trees because density does not change with the shape, size, and mass of an object.
What is density?“Density is characterized as a mass of a unit volume of an object.”
d = m/v
Where m = mass and v = volume
It is expressed as gram per cubic centimeter.
Density is a property that does not depend upon the amount of substance present.
Thus, due to the fact that density is independent of an object's shape, size, and mass, one redwood tree has nearly the same density as an entire forest of them.
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At 35°C, how many grams of NaNO3 will dissolve
in 100 grams of water?
35 grams
20 grams
37 grams
100 grams
Solubility (g of salt in 100 g H₂O)
888288 2 8 2 2
100
50
30
20
NaNO
Cach
Pb(NO₂)2
NaCl
FOND
KCI
KCIO
toofy
Ce₂(SO)
0 10 20 30 40 50 60 70 80 90 100
Temperature (°C)
100g of NaNO3 will dissolve in 100 grams of water
A homogeneous mixture of solutions of one or more solutes in a solvent. Adding sugar cubes to your tea or coffee is an example of a common solution. The ability of a sugar molecule to dissolve easily is called solubility. The term solubility can therefore be defined as the property of a substance (solute) to dissolve in a particular solvent. A solute is a substance that is either a solid, liquid, or gaseous solution in a solvent.
Here it is given that in 100g of water at temperature 35°C the amount of NaNO3 will dissolve is 100g we get it from the solubility curve
The graphical relationship between solubility and temperature is called the solubility curve. A solubility curve shows the change in solubility of a solid at different temperatures in a solvent. In the figure, temperature variation is plotted on the x-axis and solubility is plotted on the y-axis.
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If your heart beats at a rate of 72 times per minute and your lifetime will be 70 years, how many times will your heart beat during your lifetime?
Answer:
2,649,024,000
Explanation:
Multiply 72*60*24*365*70
Distinguish between haploid and diploid
When an organism's cells only have one set of chromosomes, the organism is said to be haploid. All organisms that reproduce sexually are diploid (having two sets of chromosomes, one from each parent). Only the egg and sperm cells in humans are haploid.
The term "diploid" describes an organism's cells having two full sets of chromosomes, with one chromosome from each parent present in each pair. Since humans are diploid, the majority of their cells have 23 pairs of chromosomes.
Distinguish between haploid and diploid.
The number of chromosome sets found in the nucleus is the most obvious distinction between haploid and diploid cells. In contrast to diploid cells, which have two sets of chromosomes, haploid cells only have one set.The result of mitotic cell division is the formation of diploid cells. Following meiotic cell division, haploid cells are produced.Since there are two sets of chromosomes, there are two times as many chromosomes overall as there are in haploid cells. In comparison to diploid cells, there are half as many chromosomes because there is only one set present.To know more about haploid and diploid, click on the link below:
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Sodium phosphate reacts with sulfuric acid to form sodium sulfate and phosphoric acid. What is the stoichiometric coefficient for sulfuric acid when the chemical equation is balanced using the lowest whole-number stoichiometric coefficients?.
Answer:
dividing the number of moles of each reactant
Explanation:
photon has the frequency of 2.00 x 10^19 Hz, what is the energy and wavelength of this photon.
The energy and the wavelength of the photon would be 1.3252 ×10⁻¹⁴ Joules and 150 nanometers respectively.
What is the frequency?It can be defined as the number of cycles completed per second.It is represented in hertz and inversely proportional to the wavelength.
C=λν
λ = c / ν
Wavelength = 3×10⁸ / 2.00 x 10¹⁹
=1.5 x 10⁻¹¹
=150 nanometers
By using the Planck's energy formula,
E = hν
Where h is the Planck's constant with a value of 6.626×10⁻³⁴.
The energy of the Photon = 6.626×10⁻³⁴ ₓ 2.00x 10¹⁹
The energy of the Photon = 6.626×10⁻³⁴ ₓ 2.00 x 10¹⁹
=1.3252 ×10⁻¹⁴ Joules
Thus, the energy and the wavelength of the photon would be 1.3252 ×10⁻¹⁴ Joules and 150 nanometers respectively.
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Which of the following sequences describes how a four-stroke engine cycle
powers the engine?
The four-stroke engine cycle is defined by the following steps air and fuel intake, compression and ignition, combustion and expansion, and exhaust.
The correct option is B.
What is four stroke engine cycle?A four-stroke engine cycle is a style of engine in which the piston ignites internal combustion.
The entire piston travel along the cylinder is referred to as a stroke in an engine. The order in which the processes in the engine occur is as follows:
Injection: During this procedure, the engine is injected with both air and fuel.Ignition: After the intake materials are crushed, they are ignited.Fuel is burned after being ignited, and expansion occurs once more as a result of the products that are produced during the combustion event.Exhaust: In this stage, a piston forces the engine's burned gases out of the system.To know more about Four stroke engine visit:
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The complete question is-
Which of the following sequences describes how a four-stroke engine cycle powers the engine?
A. Expansion, air and fuel intake, compression and ignition,
extinguishment
B. Air and fuel intake, compression and ignition, combustion and
expansion, exhaust
C. Hydrogen and fuel intake, expansion, compression and ignition,
exhaust
D. Contraction, compression and ignition, air and fuel intake, exhaust
The graph below shows how solubility changes with temperature.
A graph with the horizontal axis showing temperature ranging from 0 to 10 in units of 10 and the vertical axis solubility in grams of salt per 100 grams of water. Several compounds are shown. All data are approximate. The substances and their coordinates are as follows: upper N a upper C l: 0, 38; 10, 38; 20, 38; 30, 38; 40, 39; 50, 39; 60, 39; 70, 40; 80, 40; 90, 40; 100, 40. Upper N a subscript 2 upper H upper A s upper O subscript 4: 0, 5; 10, 18; 20, 28; 30, 39; 40, 49; 60, 65; 80, 82. Upper B a (upper N upper O subscript 3) subscript 2: 0, 5; 10, 8; 30, 12; 40, 15; 50, 18; 60, 20; 80, 28; 100, 33. Upper N a subscript 2 upper S upper O subscript 4: 0, 5; 5, 8; 10, 10; 15, 15; 20, 20; 25, 20; 28, 35; 30, 40; 32, 49; 33, 50; 35, 50; 40, 48; 50, 47; 60, 46; 70, 45; 80, 43; 90, 32; 100, 40. Upper C 3 subscript 2 (upper S upper O subscript 4) subscript 3 dot 9 upper H subscript 2 upper O: 0, 18; 20, 10; 30, 8; 50, 5; 60, 3; 80, 1; 100, 0.
Which two solutions have similar solubilities at 40°C?
Na2SO4 and NaCl
Na2HAsO4 and NaCl
Na2HAsO4 and Na2SO4
Ba(NO3)2 and Ce2(SO4)3 • 9H2O
Depending on the solubility at the temperature, 600 mL of saturated solution in NaCl must be prepare. Na₂HAsO₄ and Na₂SO₄ is the correct option.
The maximum amount of a chemical that will dissolve in a given amount of solvent at a given temperature is referred to as its solubility. Varying compounds have very different solubilities, which is a characteristic of a particular solute-solvent pair. The amount of a solute that dissolves in a specific volume of liquid is known as its solubility.
In terms of solubility, solute volume divided by solvent volume o
Saturated, unsaturated, and extremely saturated solutions are all possible.
The solubility of solutes increases as the temperature rises.
Depending on the solubility at the temperature, 600 mL of saturated solution in NaCl must be prepared.
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Answer:
C
Explanation:
Na2HAsO4 and Na2SO4
A researcher wants to experiment with an element that reacts like sodium (na) but has a greater atomic mass. which element should the researcher select for the experiment?
Answer: iodine
Explanation:
PLS HURRY WILL MARK BRAINLIEST
What two terms describe how new cells are made?
Answer: Mitosis & meiosis
Explanation:
Answer:
I think it is cell division and mitosis
Explanation:
I hope this is right sorry if it isnt
Calculate the molarity of Br- in 150.0 mL of aqueous solution that contains 5.07 g of zinc bromide
The molarity of the bromide ion, Br¯ in the solution is 0.3 M
What is molarity?Molarity is defined as the mole of solute per unit litre of solution. Mathematically, it can be expressed as:
Molarity = mole / Volume
How to determine the molarity of the zinc bromide, ZnBr₂Mass of zinc bromide = 5.07 gMolar mass of zinc bromide = 225.198 g/molMole of zinc bromide = 5.07 / 225.198 = 0.0225 moleVolume = 150 mL = 150 / 1000 = 0.15 LMolarity of zinc bromide =?Molarity = mole / Volume
Molarity of zinc bromide = 0.0225 / 0.15
Molarity of zinc bromide = 0.15 M
How to determine the molarity of bromide ion, Br¯Dissociation equation
ZnBr₂(aq) -> Zn²⁺(aq) + 2Br¯(aq)
From the balanced equation above,
1 mole of ZnBr₂ contains 2 moles of Br¯
Therefore,
0.15 M ZnBr₂ will contain = 0.15 × 2 = 0.3 M Br¯
Thus, the molarity of bromide ion, Br¯ in the solution is 0.3 M
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As the Cassini-Huygens spacecraft headed toward Saturn, it reached speeds of 5.2 kilometers per second. How many meters per minute did it travel at this speed?
The speed in number of meters per minute the spacecraft travel at the speed of 5.2 km per second is 3,12,000 meters per minute.
The speed is 5.2 km per second
We know that 1 kilometer per second is equal to 60000 meter per minute
So converting, we get 5.2×60000= 3,12,000 meters per minute
Conversion of units is the conversion between different units of measurement for the same quantity, typically through multiplicative conversion factors which change the measured quantity value without changing its effects.There is a multiplication factor introduced for the conversion of units through which it is converted.To learn more about unit conversion visit:
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an atom is in its lowest energy state, or state, when its electrons are in the lowest possible energy levels. if an electron moves to a higher energy state the atom is said to be in a(n) state.
An atom's ground state is its lowest energy conceivable state, in which all of its electrons are at their lowest possible energy levels.
What degree of energy does an atom contain?The energy levels of the atoms match the rows of the Periodic List of Elements when you look at it. The last electrons of the two elements on the top row, hydrogen and helium, are filling their initial energy level.
The second energy level of the eight components in the second row is being filled. The chemical characteristics of an element are determined by its outermost electrons.
Starting with the level nearest to the nucleus, the energy levels were built up. By using the Aufbau Principle, electrons are filled in by moving from the initial lowest-energy level to a second, slightly higher energy level, and finally to the third, even higher energy level.
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