a drug that opens sodium channels in a motor neuron would
Drugs that open sodium channels in motor neurons do this Depolarize the membrane.
Motor neurons are a special type of brain cells called neurons and are found in the spinal cord and brain. They are classified into her two main subtypes: upper motor neurons and lower motor neurons. Voltage-gated sodium channels play an important role in action potentials. When sufficient channels are opened by changes in the cell's membrane potential, a small but significant number of Na+ ions migrate into the cell along the electrochemical gradient, further depolarizing the cell. Drugs that open sodium channels in motor neurons depolarize the membrane. Depolarization occurs when positively charged sodium ions flow into neurons and open voltage-gated sodium channels.
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what is the molarity of an naoh solution if 48.0 ml is needed to neutralize 35.0 ml of 0.144 m h2so4? (pg. 137)
The molarity of an NaOH solution if 48.0 ml is needed to neutralize 35.0 ml of 0.144 m H₂SO₄ is 0.105 M.
What is molarity ?The molarity of a solution is a common term to express its concentration. Molarity of a solution is the ratio of its number of moles of solute to the volume of solution in liters.
If M1 and V1 be the molarity and volume of a solution, then M2 and V2 be the molarity and volume of another solution reacting completely with the first one. Then,
M1 V1 = M2 V2.
Given, volume of NaOH V1 = 48 ml
volume of H₂SO₄ V2= 35 ml
molarity of H₂SO₄ M2 = 0.144 M
Then, M1 = M2 V2/V1
M1 = (35 ml × 0.144 M) /48 ml = 0.105 M.
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an atom has a diameter of approximately 1 x 10-8 cm. how many times longer is the piece of wood than the diameter of an atom? use scientific notation.
A unit of measurement is a specific magnitude of a quantity that serves as the standard for measuring other quantities of the same kind. A single atom has a diameter of 0.1 nanometers.
1/1000000000 meter's.
A nanometer is 1 x 10-8 cm
If you convert 1cm into 10−2meters, then 10−8(10−2)meters would become 10−10meters.
and 10-10 meter's would equal 0.1 nanometers (times 10-8) when converted to nanometers.
Unit conversion is important since, with the exception of three nations, the majority of the world utilizes the metric system. Unit conversion is necessary since science employs the metric system.
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nonpolar molecules that cluster away from water molecules are called molecules. group of answer choices hydrophilic contradictive hydrophobic ionic
Hydrophobic compounds are nonpolar molecules that tend to group away from water molecules.
Non-polar molecules that do not combine with water are known as hydrophobic molecules. As a polar molecule known as a hydrophilic molecule, water mixes with other polar molecules. Hydrophobic molecules include, for instance: Waxes. The 'hydrophilicity' of a molecule or surface refers to how much or how little it draws water. Sugar, salt, starch, and cellulose are a few of the most typical examples of hydrophilic compounds. A hydrophilic material is one that is particularly attracted to water, which it spreads throughout to make the most contact with. It arises from the fact that hydrophobic substances are naturally repellent to water, resulting in the formation of droplets.
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a solution is made by adding 29.0 ml of concentrated ammonia ( 28.0 wt% , density 0.880 g/ml ) to some water in a volumetric flask, and then adding water to the mark to make exactly 200 ml of solution. calculate the concentration of this solution in molarity.
The concentration of this solution in molarity will be 2.0975 M.
Ammonia is an inorganic compound of nitrogen as well as hydrogen having formula NH₃. A stable binary hydride, as well as the simplest pnictogen hydride, ammonia is a colorless gas having a distinct pungent smell.
Mass of ammonia = Volume × Density
=29.0 mL × 0.880 g/mL = 25.52 g
Mass of ammonia = 28.0 / 100 × 25.52 = 7.145 g
Moles of ammonia = Mass of ammonia / Molar mass of ammonia
Molar mass of ammonia will be = 17.031 g / mole
Moles of ammonia = 7.145 / 17.031 = 0.4195 mole
Volume of the solution = 200 mL = 0.2 L
Molarity = Moles / Volume
= 0.4195 / 0.2 = 2.0975 M
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a 0.1500 m hcl solution was prepared on a day when the temperature was c. what is the concentration of the solution when used the next day at c? the density of water is 0.9982071 g/ml at c and 0.996512 g/ml at c.
The concentration of the HCl solution remains the same, regardless of changes in temperature.
The concentration of an HCl solution is determined by the amount of solute (HCl) in a given volume of solvent (water). It is independent of the temperature of the solution.
The temperature only affects the density of the water, which can change due to thermal expansion or contraction. However, this change in density does not affect the concentration of the solution as the number of moles of HCl remains the same.
Key points:
The concentration of a solution is defined by the amount of solute in a given volume of solvent.Temperature only affects the density of the solvent, not the concentration of the solutionA change in temperature does not alter the number of moles of solute in the solution, so the concentration remains the same.Learn more about the concentration of a solution here:
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a sample of a compound contains 4.38 g of iron and 1.25 g of oxygen. what is the empirical formula for the compound?
The empirical formula for the compound of 4.38 g of iron and 1.25 g of oxygen is FeO.
As per the given data:
A sample of a compound contains 4.38 g of iron.
Mass of iron = 4.38 g
And also 1.25 g of oxygen.
Mass of oxygen = 1.25 g
The formula for Number of Moles:
The number of moles formula is given as
Number of moles = Mass ÷ Atomic mass
Atomic mass of iron = 55.845
No. of moles of aluminum = 4.38 ÷ 55.845 = 0.0784
Atomic mass of oxygen = 16
Number of moles of oxygen = 1.25 ÷ 16 = 0.0781
Ratio of iron moles = 0.0784 ÷ 0.0784 = 1
Ratio of oxygen moles = 0.0784 ÷ 0.0781 ≅ 1
Since the ratio must contain the simplest whole number, the ratio is 1 : 1.
Thus, the simplest formula is FeO.
The inorganic substance with the formula FeO is ferrous oxide.
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how many different isotopes of silver are listed here? (the x does not necessarily represent any specific element.) 10847x10848x11047x10946x10747x
The number of isotopes of silver listed above is 1. ¹⁰⁷Ag₄₇ is the only isotope of silver listed above.
Isotopes are defined as the atoms belonging to the same element, having same atomic number Z, but different mass number A. Let's consider an example, carbon-12, carbon-13 and carbon-14 are three isotopes of the element carbon with mass numbers 12, 13 and 14 respectively.
Silver has only two naturally occurring isotopes, ¹⁰⁷Ag₄₇ (51.4%) and ¹⁰⁹Ag₄₇ (48.6%).
Isotopes usually have unique properties, and these properties make them useful in diagnostics and treatment applications. They are very important in nuclear medicine, oil and gas exploration, basic research, and national security.
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what volume of 0.1500m kmno4 would be required to fully react with 1.000g of formic acid HCO2H in an acid solution?
The volume of 0.1500 M KMnO4 required to fully react with 1.000 g of formic acid in an acid solution is:
V(KMnO4) = n(KMnO4) / 0.1500 mol/L = n(KMnO4) / 0.1500 mol/L.
The balanced chemical equation for the reaction between formic acid (HCO2H) and potassium permanganate (KMnO4) is:
5 HCO2H (aq) + 2 KMnO4 (aq) → 2 CO2 (g) + 2 MnO2 (s) + 10 H2O (l)
Here's the complete calculation for the volume of potassium permanganate required to react with 1.000 g of formic acid:
First, we'll calculate the number of moles of formic acid:
n(HCO2H) = m(HCO2H) / M(HCO2H)
n(HCO2H) = 1.000 g / molecular weight of HCO2H
Next, we'll calculate the number of moles of potassium permanganate required to react with the formic acid:
n(KMnO4) = 5 * n(HCO2H)
Finally, we'll convert the number of moles of potassium permanganate to a volume using the molarity of the KMnO4 solution:
V(KMnO4) = n(KMnO4) / M(KMnO4) = n(KMnO4) / 0.1500 mol/L
So the volume of 0.1500 M KMnO4 required to fully react with 1.000 g of formic acid in an acid solution is:
V(KMnO4) = n(KMnO4) / 0.1500 mol/L = n(KMnO4) / 0.1500 mol/L.
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if $1,000 is invested for two years after which it grows to a value of $1102.50. what is the effective rate of interest at which it grows?
The formula for future value (FV), in its simplest version, is FV= PV*(1+i)n, where "PV" stands for present value, I for interest rate, and "n" for the number of time periods.
Assuming a compounding frequency of 1, if you opted to invest $100 at a 10% interest rate, your investment should be worth $110 after a year. The investment would be worth $121 if the interest compound every two years.
One of the financial functions, FV, determines the investment's future value using a constant interest rate. FV can be used with either a series of regular, recurring payments or a single, one-time payment. To determine the future value of a sequence of payments, use the Excel Formula Coach.
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the analysis of a compound gives the following percent composition by mass: c: 53.21 percent; h: 8.589 percent; s: 10.93 percent; o: 27.27 percent. what is its molecular formula given that its molar mass is 293.4 g?
To find the molecular formula of the compound, we need to determine the number of atoms of each element in the molecule. We can use the percent composition by mass and the molar mass to do this.
First, let's convert the percent composition to grams:
C: 53.21 g/100 g * 293.4 g = 156.1 g
H: 8.589 g/100 g * 293.4 g = 25.4 g
S: 10.93 g/100 g * 293.4 g = 32.2 g
O: 27.27 g/100 g * 293.4 g = 80.1 g
Next, let's convert the masses of each element to moles:
C: 156.1 g / 12.01 g/mol = 13.01 mol
H: 25.4 g / 1.01 g/mol = 25.1 mol
S: 32.2 g / 32.06 g/mol = 1.00 mol
O: 80.1 g / 16.00 g/mol = 5.01 mol
Finally, let's divide the moles of each element by the smallest number of moles (1.00 mol of sulfur) to determine the number of each element in the molecule:
C: 13.01 mol / 1.00 mol = 13.01
H: 25.1 mol / 1.00 mol = 25.1
S: 1.00 mol / 1.00 mol = 1.00
O: 5.01 mol / 1.00 mol = 5.01
So the molecular formula of the compound is C13.01H25.1S1.00O5.01. To simplify, we can divide each subscript by the greatest common factor, which is 1 in this case. So the molecular formula of the compound is C13H25SO5.
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2. which will have a higher rf on a tlc plate, (±)-benzoin or (±)-hydrobenzoin
(±)-benzoin having a higher Rf value on TLC plate as compared to (±)-hydrobenzoin. Rf value of benzoin will be 0.844 and the Rf value of hydrobenzoin will be 0.62.
Thin layer chromatography: TLC is the technique which is used to identify the compounds as well as their purity levels. It is compared with column chromatography, TLC will requires less amounts of the compound and can be done much faster.
TLC analysis will provides a means to separate the structures which are present in the sample that was spotted as well as measure the retention factor to compare amongst the other samples. By spotting the plates as they were, plate one can compare the starting material to the recrystallized product and plate two can compare the starting material to the crude product.
The spots that share the Rf factor of 0.844 will be identified as benzoin as well as the second spot can be matched by the recrystallized product.
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a typical lead-acid storage battery contains sulfuric acid, h2so4, which breaks down into 2h so4 and each molecule delivers two electrons to the external circuit. if the battery delivers a total charge of 2.0 x 105 c, how many grams of sulfuric acid are used up?
[tex]61.25 \times 10^{24}[/tex] grams of sulfuric acid is required if the battery delivers a total charge of 2.0 × 10⁵ C.
Each molecule of H₂SO₄ breaks into 2H and SO₄ and two electrons.
These two electrons are responsible for the charge delivered to the battery.
If total charge delivered to the battery is 2.0 × 10⁵ C.
The charge on each electron is [tex]1.6 \times 10^{-19}[/tex] C.
Total number of electrons that can produce 2.0 × 10⁵ C is,
[tex]\dfrac{2.0 \times 10^{5} }{1.6 \times 10^{-19}}[/tex]
= electrons.
98 grams of H₂SO₄ delivers 2e⁻ to the battery.
1e⁻ needs 49 grams of H₂SO₄.
[tex]1.25 \times 10^{24}[/tex] electrons will require, [tex]61.25 \times 10^{24}[/tex] grams of sulfuric acid.
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when a compound containing barium ions is heated in a bunsen burner flame, photons with an energy of are emitted. what color is the barium flame? select the single best answer.
When a compound containing barium ions is heated in a Bunsen burner flame, the flame will appear yellow-green in color. This is due to the presence of barium ions in the flame, which emit photons with an energy of 5.90 x 10-19 J.
Barium ions are positively charged atoms or molecules that contain the element barium. Barium ions are formed when a barium atom gains or loses one or more electrons. Barium ions are found in various compounds, and they play an important role in various biological, chemical, and industrial processes. For example, barium ions are used to detect the presence of certain gases in the atmosphere, and they can be used as an additive in plastics and other materials. In addition, barium ions are used in medical imaging and in the production of glass and ceramics.
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which interaction is comparatively strongest if the interacting molecules are present in an aqueous solvent
Hydrophobic interactions are more powerful than other weak intermolecular forces. If the interacting molecules are in an aqueous solvent, the hydrophobic interaction is relatively strong.
An intermolecular forces is an attractive force that exists between the positive components (or protons) of one molecule and the negative components (or electrons) of another molecule. This force influences a substance's physical and chemical properties. The boiling point of a substance is proportional to the strength of its intermolecular forces; the stronger the intermolecular forces, the higher the boiling point.
We can compare the intermolecular forces of different substances by comparing their boiling points. This is because the heat absorbed by the substance at its boiling point is used to break these intermolecular forces and convert the liquid to vapor. Intermolecular forces are responsible for the majority of matter's physical and chemical properties.
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Based on the information in the table in Question 8, which chemical reaction best describes the reaction char was studied for Model 2? Justify your reasoning. A. 2A->B B. A ->BC. A+BD. A+2B->C
The correct answer is C.) A+B -> C. This is because Model2 shows that one mole of A and one mole of B combine to form one mole of C.
Since there is a 1:1 ratio of A and B, and the result is one mole of C, this would indicate a reaction of A+B -> C. Chemical processes occur when atoms form or break chemical bonds. The molecules that start a chemical reaction are known as reactants, and the compounds that are produced as a result of the reaction are known as products. However, the measurement that occurs most frequently is probably the concentration of the reactants and products. A large variety of distinct observable characteristics, such as color change, energy change (temperature change or light produced), gas production, precipitate formation, and property change, can be used to detect chemical reactions.
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an open flask sitting in a lab refrigerator looks empty, but it is actually filled with a mixture of gases called air. if the flask volume is 2.50 l, 2.50 l, and the air is at standard temperature and pressure, how many gaseous molecules does the flask contain?
At standard temperature and pressure (STP), a 2.50 L flask will contain 2.50 L x (1 mole/22.4 L) x (6.022 x 10^23 molecules/mole) = 6.50 x 10^25 molecules.
At standard temperature and pressure (STP), the ideal gas law states that the pressure of a gas is directly proportional to its absolute temperature and inversely proportional to its volume. This means that, for a given temperature, the number of gas molecules in a flask is inversely proportional to the volume of the flask.
For example, if we have a flask with a volume of 2.50 L, then the number of gas molecules it contains can be calculated by dividing the total number of moles by the volume of the flask. The total number of moles can be calculated by multiplying the number of moles per liter (1 mole/22.4 liters at STP) by the volume of the flask (2.50 L). Multiplying the number of moles by Avogadro's constant (6.022 x 10^23 molecules/mole) yields the total number of molecules in the flask. Thus, a 2.50 L flask at STP will contain 2.50 L x (1 mole/22.4 L) x (6.022 x 10^23 molecules/mole) = 6.50 x 10^25 molecules.
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to make 500ml of a 250mm working solution (of a chemical with mw = 20g/mole) you would add g of the chemical to a 1 l graduate cylinder and then bring to volume of ml with ddh2o
To make 500ml of a 250mm working solution (of a chemical with MW = 20g/mole) we have to add 250g of the chemical to a 1 L graduated cylinder and bring to the volume of 500ml with [tex]ddH_2O[/tex].
As we know that the making a workable solution is identifying the required concentration of a substance in a particular volume and then figuring how much of the component to add to that volume.
To generate 500ml of a 250mM working solution of a chemical having a molecular weight of 20g/mol,
Mass of chemical = (concentration x volume x MW) / 1000ml
= (250mM x 500ml x 20g/mol) / 1000ml
= 250g
Hence, pour 250g of the chemical into a 1 L graduated cylinder and fill to 500ml with purified water.
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The given question is incorrect. The correct question is given as:
To make 500ml of a 250mm working solution (of a chemical with MW = 20g/mole) you would add _____ g of the chemical to a 1 L graduate cylinder and then bring to volume of _____ml with [tex]ddH_2O[/tex].
What is the value of Ksp for bismuth sulphide (Bi2S3) which has a solubility of 1.0×10 −15 mol/L at 25∘C ?
The value of the Ksp for the bismuth sulphide (Bi₂S₃) and which has the solubility of 1.0 × 10⁻¹⁵ mol/L at 25 °C is 1.1 × 10⁷³.
The chemical equation is :
Bi₂S₃ ⇄ 2Bi³⁺ + 3S²⁻
The expression for the ksp is as follows :
ksp = [Bi³⁺]² [S²⁻]³
The solubility = 1.0 × 10⁻¹⁵ mol/L
[Bi³⁺] = 2 ( 1.0 × 10⁻¹⁵ ) = 2 × 10⁻¹⁵
[S²⁻] = 3 ( 1.0 × 10⁻¹⁵ ) = 3 × 10⁻¹⁵
ksp = (2 × 10⁻¹⁵ )² ( 3 × 10⁻¹⁵ )³
ksp = 1.1 × 10⁷³
Thus, the ksp for the Bi₂S₃ is 1.1 × 10⁷³.
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At any given temperature, a ample of molecule ha a. The thermal energy ditribution plot ha the hape of Blank. The higher the temperature, the Blank. Becaue of Blank, a mall change in temperature reult in a large difference in the number of molecule having enough energy to urmount the activation barrier. Target 1 of 4target 2 of 4target 3 of 4target 4 of 4
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At any given temperature, a sample of molecules has a thermal energy distribution plot with a bell-shaped curve. The higher the temperature, the more spread out the curve is. Because of this, a small change in temperature results in a large difference in the number of molecules having enough energy to overcome the activation barrier.
About TemperatureTemperature is a measure of the level or degree of heat on an object. Temperature shows the level of the amount of heat energy that is in the object.
Discussion:
The higher the temperature of an object, the hotter it is, and the more heat energy is in that object. The tool for measuring temperature is a thermometer.
For example, hot water has more heat energy than cold ice.
Temperature is one of the basic quantities, which cannot be derived from other quantities. Temperature is measured in Kelvin (in the International System), but in everyday use the most common measurement is degrees Celsius (°C). For example, the temperature of freezing water is 0°C, the temperature of the human body is about 37.5°C and the temperature of boiling water is about 100°C.
The Kelvin scale has many scientific uses, such as calculating temperature and its change in an ideal gas. The kelvin is the SI unit for temperature, where 0 K is absolute zero (at which there is no movement of particles, which is equivalent to -273 °C.
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recall the situation when you fail a hot or cold object discuss the temperature differences involved and the direction in which the energy was being transferred
The heat energy will transfer from the hotter objects to colder objects. Thus, when we touch colder objects the temperature of our hand decreases by the heat transfer to the colder bodies.
What is heat transfer ?Heat energy will transfer from one area to the other over a temperature gradient. Thus heat transfers from hotter area to the colder areas.
There are three different modes of heat transfer namely, conduction, convection and radiation. Conduction is the heat transfer mode in solids and convection takes place in liquid and gases.
In conduction, heat is transferring through the hotter end to the colder end of the closely packed chain in solids. Convection takes place by raising the hotter molecules to the surface and radiation taking place through vacuum.
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4. Identify the following nuclear changes as alpha decay or beta decay.
a. A radium atom with 88 protons and 138 neutrons
becomes a radon atom with 86 protons and 136
neutrons.
b. A sodium atom with 11 protons and 13 neutrons
becomes a magnesium atom with 12 protons and 12
The fact that radon is a gas and can enter basements through any cracks makes it a potential health risk. Radon decays into radioactive polonium (Z = 84) and has a half-life of 3.8 days.
For a nucleus containing 88 protons and 138 neutrons, what is the isotope notation?Ra-226 has a half-life of 1600 years, a significant difference from the other radioactive isotopes of radium that decay over a short period of time. It possesses 138 neutrons in its nucleus and 88 protons, which is equal to the number of electrons in its shells, giving it a mass number of 226.
How can half-life be resolved?A reaction's half-life is the amount of time needed for the reactant concentration to drop to half its initial value.
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the spacing between (111) planes in a material with a cubic cell will increase if the lattice parameter, a, increases. this increase in will have what kind of impact on the (111) bragg peak (or reflection) position in :
An increase in the lattice parameter, a, will cause an increase in the spacing between the (111) planes of the cubic cell.
This, in turn, will result in an increase in the Bragg peak or reflection position for the (111) planes. The magnitude of the increase will be directly proportional to the increase in the lattice parameter, a.
The Bragg equation states that the angle of incidence, θ, is related to the interplanar spacing, d, of the reflecting planes (hkl) and the wavelength, λ, of the X-ray wave. This equation can be used to calculate the interplanar spacing of the (111) planes in a cubic cell using the known lattice parameter, a. When the lattice parameter, a, increases, the interplanar spacing of the (111) planes also increases, resulting in an increase in the Bragg peak or reflection position for the (111) planes. The magnitude of the increase in the Bragg peak will be directly proportional to the increase in the lattice parameter, a.
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the reaction of methyl iodide with sodium azide, nan3, proceeds by an sn2 mechanism. what is the effect of doubling the concentration of nan3 on the rate of the reaction? a. the rate remains the same b. the rate decreases by a factor of 2 c. the rate increases by a factor of 2 d. the rate increases by a factor of 4
The reaction of methyl iodide with sodium azide, NaN₃, proceeds by an SN2 mechanism. The effect of doubling the concentration of NaN₃ on the rate of the reaction is the rate increases by a factor of 2. The correct answer is C.
The alkyl halide is attacked by the nucleophile as the SN2 mechanism. as a partial bond is formed involving the nucleophile and carbon atom. Halide and carbon's bond partially dissolves. A transition is created where there are five bonds around the carbon atom. The product is created when the leaving group, which is a halide, removes the electrons from the C-X link and departs the molecule.
R-X + Nu⁻ → Nu
--R--X → Nu-R + X⁻
Since a transition state that contains both a nucleophile and a substrate is used for the nucleophilic substitution. It was discovered that the concentration of the substrate and the nucleophile both affect the rate of the reaction.
Rate = k [substrate] [nucleophile]
Since sodium azide is the nucleophilic species and methyl iodide is the substrate,
Rate = k[CH₃I][NaN₃]
both the reactants take part in the reaction and the rate law for the reaction. As a concentration of NaN₃ is doubled, the new rate becomes,
Rate' = k[CH₃I][2 NaN₃]
= 2 k[CH₃I][NaN₃]
= 2 Rate
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table salt (nacl) has i = 2 because there are two ions per every sodium chloride formula unit. what is the van't hoff factor for cabr2?
Since CaBr2 dissolves in water to form two ions (Ca2+ and Br-), the Van't Hoff factor is 2.
When a solute (a substance that is dissolved) is evenly distributed in a solvent (a substance that dissolves the solute), a homogeneous mixture known as a solution is created. A liquid, gas, or supercritical fluid can serve as the solvent, and a solid, liquid, or gas can serve as the solute. When a solute dissolves in a solvent, the heat energy displaces the attractive interactions between the solvent molecules, allowing the solute particles to split and disperse uniformly throughout the solvent. A solute's capacity to dissolve in a solvent is influenced by a number of variables, including the solute's concentration, solvent type, temperature, and pressure.Sometimes, the solute particles can create new chemical compounds.
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what are the essential ingredients of a symmetric cipher?
A symmetric cipher typically has the following essential ingredients: key, plaintext, encryption algorithm, decryption algorithm.
A key: A secret value shared between the sender and the receiver that is used to encrypt and decrypt the message.
A plaintext: The original, unencrypted message.
An encryption algorithm: A mathematical function that takes the plaintext and the key and produces an encrypted message (ciphertext).
A decryption algorithm: A mathematical function that takes the ciphertext and the key and produces the original plaintext.
A method for securely sharing the key between the sender and receiver, as the security of a symmetric cipher relies on the secrecy of the key.
Note: The exact ingredients may vary depending on the specific symmetric cipher being used.
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which one of the following complexes exhibits chirality?
a. [cr(ox)3]3
b. cis – [ptcl2(en)]
c. cis – [rhcl2(nh3)2]
d. mer – [co(no2)3(cl)3]
Chiral and devoid of any symmetry components, the complex [Cr(ox)3]3 is. It has two different forms: d and l. The achiral complexes cis [PtCl2 (en)], cis [RhCl2(NH3)4]+and have symmetry components.
cis‐[PtCl2(en)] Due to the twist in the en ligand, this molecule would be chiral. In the octahedral cobalt(II) and zinc(II) complexes made from the Schiff base, the chiral conformation of the diamine precursor is preserved. The chiral component of the two is cis-[CrCl2(OX)2]3. Geometrical isomerism may be present because two chlorine ligands may be trans in one isomer and cis in the other. It is impossible to achieve optical isomerism because both isomers contain a plane of symmetry.
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PLEASE HELP I WILL GIVE BRAINLIEST WITH TWO QUESTIONS(Hess’s law)
The equation ΔH = ΣΔHf (products) - ΣΔHf (reactants), we can calculate the enthalpy of reaction as ΔH = 318.7 kJ/mol.
What is reaction?Reaction is the way in which one responds to a certain stimulus or event. It can be mental, emotional, physical, or any combination of the three. Reactions can range from positive to negative, depending on the situation. Reactions can be instinctive, or they can be the result of conscious thought and decision-making.
The equation for the reaction is:
C + 2H2 → CH4
The standard enthalpy of formation for each species is as follows:
C: -393.5 kJ/mol
H2: 0 kJ/mol
CH4: -74.8 kJ/mol
Using the equation ΔH = ΣΔHf (products) - ΣΔHf (reactants), we can calculate the enthalpy of reaction as follows:
ΔH = (-74.8 kJ/mol) - (-393.5 kJ/mol + 0 kJ/mol)
ΔH = 318.7 kJ/mol.
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Red gold i a gold-copper alloy ued to make jewelry. A piece of jewelry made of red gold weigh 9. 21 g and ha a volume of 0. 559 cm'. Gold ha a denity of 19. 3 g/em' and copper ha a denity of 8. 96 g/cm?. Calculate the percentage by ma of each metal in the jewelry. Aume the total volume of the jewelry i the um of the volume of the two metal it contain
Red gold is a gold-copper alloy that is commonly used to make jewelry. To calculate the percentage by mass of each metal in the jewelry, you need to determine the mass of gold and copper in the jewelry. The mass of gold can be calculated using the density of gold and the volume of gold in the jewelry:
mass of gold = density of gold * volume of gold
mass of gold = 19.3 g/cm³ * 0.559 cm³
mass of gold = 10.8 g
The mass of copper can be calculated using the density of copper and the volume of copper in the jewelry:
mass of copper = density of copper * volume of copper
mass of copper = 8.96 g/cm³ * (0.559 cm³ - 0.559 cm³)
mass of copper = 0 g
The total mass of the jewelry is 10.8 g + 0 g = 10.8 g.
Therefore, the percentage by mass of gold in the jewelry is 10.8 g/10.8 g = 100%. The percentage by mass of copper in the jewelry is 0 g/10.8 g = 0%.
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martin is failing to consider __________ when defending his approach for the proposal.
When formulating the idea, Martin disregards the intercultural conflict style of Japan. In order to identify as a part of a community that uses shared symbol systems, people must participate in a kind of human social organization called culture.
Instead than engaging in conflict, the Japanese would rather wait for disputes to eventually fade away. They are confident that this will eventually result in a situation with minimal variances and a certain amount of harmony. There is value placed on self-control, tenacity, and duty. Japanese people may remain silent or speak in a subdued manner during a dispute to indicate their anger but not to show it directly. Unless one party has a much higher prestige than the other, people rarely lose their temper or speak rudely in public.
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