When a piece of I2 in 50 ml of water is placed then another piece of I2 of the same mass in C6H14 is placed then hydrogen bonding is formed in water and a strong London dispersion force occurs.
C6H14 is a straight chain alkane with 6 carbon atoms with no double or triple bond.this is non polar. So, London dispersion forces exist.this is the force that exists between all molecule.this is the weakest intermolecular forces.the boiling point of C6H14 increases as their atomic mass increases due to stronger London dispersion force.
Water has strong intermolecular forces.in this,hydrogen bonding and dipole moment created by the strong electronegative oxygen and hydrogen.water has hydrogen bond,dipole induced dipole forces and London dispersion forces.
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an insulated rigid tank contains 5 kg of air at 15 oc and 100 kpa. an electric resistance heater inside the tank is now turned on and kept on until the air temperature rises to 40 oc. determine the entropy change of the air during this process.
Answer is Δs=0.3kJ/K
Since, the tank is insulated rigid tank, The process is constant volume process,
Air as perfect gas
Obtain the properties from the table. Consider th state 1. P=100kPa, T, = 15°C
s=6.830kJ/kg-K
v=0.827 m³/kg
Constant volume process,
Consider the state 2. T = 40°C, v, v = 0.827 m²/kg
5,6.890 kJ/kg-K
Calculate the change in entropy,
Δs=m(s, -s) =5(6.890-6.830)
Δs=0.3kJ/K
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if 100. ml of the solution in part 1 is concentrated by evaporation to give a final volume of 1.00 ml, what is the change in ph?
if 100. ml of the solution in part 1 is concentrated by evaporation to give a final volume of 1.00 ml, the change in pH decreases by 2 pH increases by 2.
what is evaporation?
Your body feels a little bit colder when you put perfume on it. Water and acetone operate similarly. This is a result of evaporation, which is the process by which a substance transforms from a liquid to a gas. The only distinction is the speed at which the cooling is experienced. Acetone causes the area of your body closest to the liquid to cool off the fastest. This occurs as a result of acetone evaporating more quickly than water or scent.The transfer of the liquid particles into the gaseous phase is known as evaporation, which often occurs on the surface of liquids.However, This procedure is therefore stated to include a shift in the liquids' condition of matter.
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saline solutions are often administered intravenously to patients. if a saline solution is 0.450% sodium chloride by mass, what is the molarity of na in the saline solution? assume the saline solution has a density of 1.005 g/ml.
The the the molarity of na in the saline solution of nacl in the saline solution was 0.077 M.
Molar concentration is a measure of the concentration of a chemical species, especially of a solute in a solution, in terms of the amount of substance according to the unit quantity of the solution. In chemistry, the most normally used unit for molarity is the variety of moles according to liter, having the unit symbol mol/L or mol/dm³ in the SI unit.
Calculation:-
0.45% NaCl by mass
Density = 1.005 g/ml
0.45g NaCl in a total mass of 100 g
100 g in ml = 100/1.005 mL
= 99.50 ml
0.450 g NaCl in moles = 0.450 /M nacl
= 0.450/58.44
= 7.70 × 10⁻³ mol
Molarity of NaCl = 7.70 × 10⁻³ /99.50 × 100
= 0.077 M
Molarity (M) is the quantity of a substance in a sure volume of answer. Molarity is defined because the moles of a solute according to liters of a solution. Molarity is also called the molar awareness of a solution.
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a nucleoside triphosphate containing a 5 carbon deoxyribose sugar and the nitrogenous base thymine would be called:
A nucleoside triphosphate containing a 5-carbon deoxyribose sugar and the nitrogenous base thymine would be called a thymidine monophosphate.
Nucleotides are comprised of three components: a nitrogenous base, a pentose sugar, and one or more phosphate groups. Each of these elements is referred to as an "n" (nucleotide), so when we combine them all together, we get nucleotides like dATP and dTTP.
Thymidine is the name of the parent nucleotide from which derivative nucleotides are made. Thymidine monophosphate contains thymine and a phosphate group, which makes it different from other nucleotides. In this case, it has one phosphate group attached to its 5-carbon deoxyribose sugar, which is also called deoxyribonucleic acid (DNA).
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which of the following best summarizes the composition of hydrocarbon molecules in this outcrop of tar sand? choose one: a. small, simple hydrocarbon molecules b. moderate-length chain hydrocarbon molecules c. large, complex chain hydrocarbon molecules
The Correct answer is A) small, simple hydrocarbon molecules the following best summarizes the composition of hydrocarbon molecules in this outcrop of tar sand.
Crude oil, natural gas, and coal all contain hydrocarbons, which are organic molecules made of hydrogen and carbon. Humans have modified them to be utilized as an energy source, such as in the production of gasoline and jet fuel.
The simplest organic molecules, hydrocarbons are composed exclusively of hydrogen and carbon atoms.
Fuel is the most significant application of hydrocarbons. Among the most widely used hydrocarbon fuels include gasoline, natural gas, fuel oil, diesel, jet fuel, coal, kerosene, and propane. Plastics and synthetic fabrics like polyester are made using hydrocarbons as well.
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A university class has 12 students enrolled, 2 of whom are graduate students.
What is the probability that a randomly chosen student will be a graduate
student?
Write your answer as a fraction or whole number.
P(graduate student)
=
Answer:
Answer 1/6
Explanation:
Which of the following elements is the LEAST reactive?
Fluorine, Rubidium, Cesium, and Gold
Answer:
The least reactive metals would be Platinum, Gold, Palladium, Osmium and Silver and in the decreasing order.
Of the following elements: Fluorine, Rubidium, Cesium, and Gold is the LEAST reactive:
Gold
30.00 ml of a h2so4 solution with an unknown concentration was titrated to a phenolphthalein endpoint with 44.45 ml of a 0.1489 m naoh solution. what is the concentration of the h2so4 solution?
The concentration of the H2SO4 solution should be 0.1101 M.
Calculation of the concentration:
Since
Volume of H2SO4 = 30.00 mL = 0.030 L
Volume of NaOH= 44.45 mL = 0.04445 L
Concentration of NaOH= 0.1489 M
Now
The balanced equation is
H2SO4 + 2NaOH → Na2SO4 + 2H2O
Now the concentration of the H2SO4 solution is
b*Ca*Va = a*Cb*Vb
here, b = the coefficient of NaOH = 2
Ca = ?
Va = the volume of H2SO4= 30.0 mL = 0.030 L
a = the coefficient of H2SO4 = 1
Cb = the concentration of NaOH = 0.1489 M
Vb = the volume of NaOH = 44.45 mL = 0.04445 L
Now
2*Ca*0.030 = 1* 0.1489* 0.04445
0.060 * Ca = 0.00661
Ca = 0.1101 M
Hence, The concentration of the H2SO4 solution is 0.1101 M.
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When a chlorine atom reacts weith a sodium atom to form an ion, the chlorine atom will
Select one:
a.
gain one electron
b.
gain two electons
c.
lose two electrons
d.
lose one electon
Answer:
a) gain one electron
Explanation:
When the chlorine atom reacts with the sodium atom, it creates NaCl. Sodium would be your cation and chlorine would be your anion. A sodium atom (Na) has a 1+ charge while the chlorine atom (Cl) has a 1- charge. As a result, sodium would lose a valence electron causing chlorine to gain a electron.
the molar concentration of a sugar solution in an open beaker has been determined to be 0.5m. calculate the solute potential at 26 degrees celsius.
The solute potential at 26 degrees Celsius of the molar concentration of a sugar solution in an open beaker has been determined to be 0.5m is -12.4 bar.
Solute potential can be calculated by using:
Ψ = -iCRT
As we know,
i = 1
C = 0.5 (mol/L).,
R = 0.0831 L·bars/mol·K
T = 299K
Ψ = - 0.5*0.0831*299 = - 12.4 bar
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Sodium can combine with element "X" so that
the chemical formula is Na₂X. What element
could element "X" be?
A)Phosphorus
B)Helium
C)Magnesium
D)Sulfur
Sodium can combine with element "X" so that the chemical formula is Na₂X. element "X" be Sulphur and compound is Na₂S - sodium sulfide.
Ionic bond involves the attraction in positive charge , cation and negative charged anion . The charge of amount of atoms balance to become a neutral compound. Sodium is a metal and have tendency to donate electron and become Na⁺ and Sulphur is a non metal and have tendency to accept electron and form S²⁻. The both combine and for a ionic compound. the 2 negative charge of sulfur atom may be neutralize by 2 Na⁺ atom.
2Na⁺ + S²⁻ ------> Na₂S
Thus, Sodium can combine with element "X" so that the chemical formula is Na₂X. element "X" be Sulphur and compound is Na₂S - sodium sulfide.
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calculate the pH of 10 g dm-3 HCL
The pH of 10 g dm -3 HCL is 3. The pH scale determines how acidic or basic water is. The range is 0 to 14, with 7 representing neutrality.
What is pH ?Acidity is indicated by pH values below 7, whereas baseness is shown by pH values above 7. In reality, pH is a measurement of the proportion of free hydrogen and hydroxyl ions in water.
Hydrogen potentials are what PH stands for. It speaks of how many hydrogen ions are present in a solution. This serves as a gauge for the acidity or alkalinity of a solution. On a pH scale, the pH value ranges from 0 to 14.
A solution's pH is a significant indicator of its chemical composition. The pH may affect how readily available nutrients are, how biological processes work, how bacteria behave, and how chemicals behave.
[ H⁺ ] = 10 − 3 M,
pH = − log [ 10 − 3 ],
pH = 3.
Thus, The pH of 10 g dm -3 HCL is 3.
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Order the sequence of ideas that led to the current model of the atom. Place a number in front of each event to show the correct order.
The correct sequence of ideas that led to the current model of the atom is as follows:
1. Dalton developed the theory that all matter is made of atoms.
2. Thomson discovered that atoms contain electrons.
3. Rutherford discovered that atoms have a nucleus.
4. Bohr developed the model in which electrons orbit the nucleus.
5. Schrödinger developed the electron cloud model of the atom.
What is an atom?An atom is the smallest unit of a chemical element that can take part in a chemical reaction.
The atomic theory of matter is the theory that all matter is composed of atoms.
Atoms are composed of electrons, protons, and neutrons.
Several scientists contributed ideas that led to the current model of the atom. These scientists include:
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Complete question:
Order the sequence of ideas that led to the current model of the atom. Place a number in front of each event to show the correct order.
Rutherford discovered that atoms have a nucleus.
Dalton developed the theory that all matter is made of atoms.
Schrödinger developed the electron cloud model of the atom.
Bohr developed the model in which electrons orbit the nucleus.
Thomson discovered that atoms contain electrons.
reactions that generate products enriched in one enantiomer are said to be . multiple choice question.
Enantioselective are reactions that generate products that are enriched in one enantiomer.
What are enantiomers?Enantiomers are pairs of molecules that exist in two forms that are mirror images of each other but are not superimposable. The enantiomers are chemically identical in all other respects. Enantiomeric pairs are distinguished by the direction in which they rotate polarized light when dissolved in solution, either dextrorotatory (d or +) or levorotatory (l or -). Hence the term optical isomer.
The enantioselectivity of a chromatography system is defined as the preferential interaction of one enantiomer with a chiral selector. It is usually determined as the ratio of the retention factors of the two enantiomers in a chiral chromatography or electrophoresis system.
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what are the procedure in removing carbon (iv) oxide from hair
Answer:
There are two primary hair removal methods with electrolysis: galvanic and thermolytic. Galvanic hair removal chemically destroys the hair follicle. Thermolytic removal uses heat to destroy the follicle.
Explanation:
3. if a nitrogen atom contains only single bonds to 2 h atoms and one cl atom, how many bonding electrons are assigned to the n atom when calculating the oxidation number?
There are 14 valence electrons assigned to the n atom.as it forms NH4CL lewis structure.
Lewis structure can be explained the bonding pair from the lone pair electrons.it shows non bonding electrons.hydrogen atom form one covalent bond.cl is anionic monoatomic ligand. H is a diatomic anionic ligand. Nitrogen is the least electronegative atom goes at the center.Hydrogen atoms always go on the outside of lewis structure.
In this, N has 5 valence electron.Hydrogen has 1 and cl has 7 valence electron.that gives total 14 valence electrons.cl has 3 lone pairs and n has a lone pair..
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three samples of an ideal gas, all at the same temperature, occupy identical containers with the same volume. assume that the mass of the particle is proportional to its size. which of the gas samples has the greatest pressure?
The three samples of an ideal gas, all at the same temperature, occupy identical containers with the same volume. the particle mass is proportional to the size of particles. the gas samples has the greatest pressure is in which has greater no. of moles.
The equation for an ideal gas given as :
P V = n RT
where,
P = pressure
V = volumes in L
T = temperature at K
n = moles
R = 0.082 L atm / mol K = gas constant
since volume and temperature are constant , then :
P = n
therefore greater the number of moles , greater will be the pressure.
Thus, The three samples of an ideal gas, all at the same temperature, occupy identical containers with the same volume. the mass of the particle is proportional to its size. the gas samples has the greatest pressure is in which has greater no. of moles.
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PLEASE ANSWER FAST
In an ionic bond between 2 sodium atoms and an oxygen atom, what resulting charge would each atom have?
Answer:
Explanation:
Ionic bonds form between two or more atoms by the transfer of one or more electrons between atoms. Electron transfer produces negative ions called anions and positive ions called cations. These ions attract each other.
Explanation: An ionic bond is formed because sodium is a part of the Alkali metals and Oxygen is a non-metal and a gas. 4Na + O2 → 2Na2O (s) OR Na + O2 → NaO2 (s).
Answer:
Explanation:
Ionic bonds form between two or more atoms by the transfer of one or more electrons between atoms. Electron transfer produces negative ions called anions and positive ions called cations. These ions attract each other.
What is the frequency of a wave whose wavelength is 5.67 x 10^-7
what is the voilume of a solution that would result by diluting 50.0 mlof 0.101 m naoh to a ocfncentration of 0.0505m
The volume of the solution that would result by diluting 0.1M solution to 0.05M is 100ml.
The molarity of the substance is defined as the number of moles of solute per unit volume of solution in liters.
Hence, if we can write,
Molarity = moles/volume
Moles = molarity x volume
Moles are always constant, so,
initial molarity x initial volume = final molarity x final volume
The initial volume is 50ml and initial molarity is 0.1M, after diluting, the final molarity is 0.05M.
Putting values,
50 x 0.1 = Volume of NaOH after dilution x 0.05
Volume of NaOH after dilution = 100 ml.
So, the volume of the resulting solution after dilution is 100ml.
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The addition of 3. 15 g of ba(oh)2*8H2O to a solution of 1. 52 g of NH4SCN in 100 g of water in a calorimeter caused the temperature to fall by 3. 1 C. Assuming the specific heat of the solution and products is 4. 20 J/g C, calculate the approximate amount of heat absorbed by the reaction, which can be represented by the following equation:
A solution of 1.52 g of NH4SCN in 100 g of water in a calorimeter decreased in temperature by 3.1 °C when 3.15 g of Ba(OH)28H2O was added. Calculate the approximate amount of heat absorbed by the reaction using the following equation, assuming the specific heat of the solution and products is 4.20 J/g °C:
Ba(OH)2 + 8H2O + 2NH4SCN = 10H2O + Ba(SCN)2(aq), 2NH3(aq), and (l)
What is Absorbed ?A material in one state is transferred into another substance in a different state through the process of absorption in chemistry (e.g., gases being absorbed by a liquid or liquids being absorbed by a solid).
The process of absorption is how the blood takes in the byproducts of digestion so that it can supply the rest of the body. The mucous membrane allows for the passage of the digested materials into the blood or lymph during absorption. The following mechanisms allow for absorption. basic diffusion
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Why would a thermometer be considered a speedometer for atoms? Explain with at least 2 sentences.
Apply to a gas molecule's kinetic energy is not the same as telling you the speed, so calling a thermometer a speedometer for atoms is deceptive.
Why would a thermometer be considered a speedometer for atoms?Uniformly, if a sample of water is put down in the freezer, its molecules begin to move slower (with a lower speed) and this is thought the back by a lower thermometer reading. It is in this feeling that a thermometer can be thought of as a speedometer. As John Rennie broaches in the comments, thermometers work for solids, liquids, and gasses, whereas the temperature is comparable to the average. A thermometer would be an average speedometer for the primary molecules of a substance or structure, not specifically separate atoms.
So we can conclude that thermometers compute the average velocity of atoms in a given material or order volume.
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Which play borders the philippine plate
The plates which borders the great philippine plate are the:
The Pacific platesThe Sunda platesThe Eurasia platesHow are the Pacific, Sunda and Eurasia plates borders the philippine plate.It follows that all the plates which have the sea Philippines plates bordered have one thing in common. They are all defined by means of convergent boundaries. In order words, the Pacific, Sunda and Eurasia plates border the philippine plate are produced by different plates which are converging towards each other in several directions.
In conclusion, we can now know that one of the major plates which borders the sea philippines plate is the Pacific plates.
Complete question:
Which plates borders the philippine plate?
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What are the hydronium-ion and the hydroxide-ion concentration of a solution at 25°C that is 0.0085 M Ba(OH)_2?
The hydronium-ion concentration of the solution containing 0.0085 M Ba(OH)₂ is 0.017M and the hydroxide-ion concentration of the solution containing 0.0085 M Ba(OH)₂ is 5.88 × 10⁻¹³ M.
Given,
Ba(OH)₂ = 5.88 × 10⁻¹³ M
Dissociation of Ba(OH)₂ is given as :
Ba(OH)₂ → Ba²⁺ + OH⁻
Balanced equation:
Ba(OH)₂ → Ba²⁺ + 2OH⁻
As 1 mole of barium hydroxide produces 2 moles of hydroxide ions, so the concentration of hydroxide ion is,
[OH⁻] = 2 × [Ba(OH)₂]
[OH⁻] = 2 × 0.0085 M
[OH⁻] = 0.017 M
The concentration of hydronium ion is as follows:
[H₃O⁺] = Kw / [OH⁻]
∴ Kw = 1.0 × 10⁻¹⁴
[H₃O⁺] = 1.0 × 10⁻¹⁴ / 0.017
⇒ [H₃O⁺] = 5.88 × 10 ⁻¹³
Hence, the hydronium-ion and the hydroxide-ion concentration of the solution containing 0.0085 M Ba(OH)₂ at 25°C are 5.88 × 10 ⁻¹³ and 0.017 M respectively.
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3. using the 1h nmr spectrum shown below. a) confirm the identity of the compound using the nmr provided. is this consistent with acetophenone (starting material) or the benzoic acid (product)? b) using the table below list the 4 signals shown. include chemical shift in ppm, multiplicity and number of protons. for calculating the number of protons, use the integration curves provided in the nmr and a ruler. c) support your answer in a) using the data obtained from the nmr. explain using the peak(s), or absence of peak(s), that sustain the identity of the compound.
Since 2 2.60 PPM singlet was seen for the /C-CH, Proton, and IHNMR data clearly showed the presence of acetophenone. IHNMR chemical with a multiplicity of 2.60 PPM is singlet, and there are 3 photons in total.
IHNMR chemical with a multiplicity of multiple number of photons of 7.49 to 7.45 PPM and a Proton number of 1. acetophenone number of photons in an IHNMR chemical with a multiplicity of 7.60 - 7.55PPM is multilaterally 2. IHNMR Chemical of multiplicity 7:98 - 7.94 PPM is multiplet no. of Proton is 2. So, Acetophenone chemical will be administered. Only one at proton comparatively shielded opposition and miter will give multiple in the benzene ring according to the IHNMR value of one singlet observed at 2–6 1 PPM. OxfordCryosystems.
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In each case, she fills a reaction vessel with some mixture of the reactants and products at a constant temperature of 135.0 °C and constant total pressure. Then, she measures the reaction enthalpy AH and reaction entropy AS of the first reaction, and the reaction enthalpy AH and reaction free energy AG of the second reaction. The results of her measurements are shown in the table. Complete the table. That is, calculate AG for the first reaction and AS for the second. (Round your answer to zero decimal places.) Then, decide whether, under the conditions the engineer has set up, the reaction is spontaneous, the reverse reaction is spontaneous, or neither forward nor reverse reaction is spontaneous because the system is at equilibrium. AH = -107. kJ AS = -194 J K X $ ? AG = kJ C(s) + 2C1, (g) - CC1,(g) Which is spontaneous? this reaction the reverse reaction neither AH = 951. kJ | as=0 AG = 37. kJ Al 0,(s) + 3H2(g) + 2Al(s) + 3H20 (8) Which is spontaneous? this reaction the reverse reaction neither
To understand the connection between free energy and the equilibrium constant. The sign of a chemical reaction's standard free energy change G° determines whether the reaction will tend to proceed forward or backward. Similarly, the relative signs of G° and S° determine whether or not temperature affects the spontaneity of a chemical reaction, and if so, how much.
How do you determine enthalpy and entropy?G is only relevant for changes where the temperature and pressure remain constant. Most laboratory reactions are performed under these conditions; the system is usually open to the atmosphere (constant pressure), and the process begins and ends at room temperature (after any heat we have added or which is liberated by the reaction has dissipated.)
The Gibbs function is crucial because it is the single master variable that determines whether a given chemical change is thermodynamically possible.
Thus, if the free energy of the reactants is greater than the free energy of the products, the entropy of the world will increase when the reaction occurs as written, and the reaction will tend to occur spontaneously. In contrast, if the free energy of the products exceeds that of the reactants, the reaction will tend to proceed in the opposite direction rather than the one specified.
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Outline an alternative method and name equipment you could use to collect gas and work out the
volume produced in a more accurate way.
The alternative method to collect the gas and measure the volume is by a gas syringe.
What is a gas syringe?
Gas syringe is an equipment used to pump or withdraw gas from a closed container and can measure the volume of the gas produced in any chemical reaction.
The volume of the gas produced can be measured by reading the measuring scale on the gas syringe when the plunger moves in a gas syringe.
Hence, gas syringe is an alternative method to collect and measure the volume of the gas in a chemical reaction.
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Can buffer happen with a strong acid and a salt?
The question: 0.2 HCl and 0.2 NaCl
A buffer can not be made from a strong acid and a salt.
What is a buffer?We know that the term buffer has to do with the type of solution that we use to prevent any kind of change in the acidity or the alkalinity of a solution. In order words, the buffer is the type of solution that is used to prevent a change in the pH of the system.
Unfortunately, there can not be a buffer that is made from a strong acid and a strong base. Rather we can only have a buffer that is made from a weak acid and its salt or a buffer that is made from a weak base and its salt.
Since HCl is a strong acid and NaCl is a salt of strong acid, it then follows that the combination of HCl and NaCl can never be used as a buffer.
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Write the formulas of the following binary molecular compounds:
9) nitrogen monoxide
10) diphosphorous pentaoxide
11) chlorine dioxide
12) dinitrogen tetroxide
the ability of sim agar to test for hydrogen sulfide production is based on the addition of which of the following substrates? the ability of sim agar to test for hydrogen sulfide production is based on the addition of which of the following substrates? ferrous sulfate sodium thiosulfate peptone peptones, sodium thiosulfate, and ferrous sulfate submit request answer part b hydrogen sulfide gas has a characteristic odor that is similar to what smell? hydrogen sulfide gas has a characteristic odor that is similar to what smell? rotten eggs garden soil body odor baking bread
The ability of sim agar to test for hydrogen sulfide production is based on the addition of which of the following substrates - Peptones, Sodium Thiosulphate, Ferrous Sulfate.
What is Sim agar ?An example of a multi-test medium is SIM (sulfide, indole, motility) media, which examines multiple aspects of the bacterium's metabolism simultaneously. In this instance, motility, indole synthesis, and hydrogen sulfide generation.
Motility, indole, and sulfur. This media is differential. It examines an organism's capacity to reduce sulfur, make indole, and move through the agar (be motile). SIM is frequently used to distinguish between Enterobacteriaceae species.
Pancreatic digest of casein, peptic digest of animal tissue, ferrous ammonium sulfate Fe(NH4)2(SO4), sodium thiosulfate Na2S2O3, agar (3.5 g/L), and distilled water are all ingredients in SIM Medium.
The colorless gas hydrogen sulfide (H2S) has a pungent smell of rotting eggs. The eyes and respiratory system may get irritated after being exposed to hydrogen sulfide.
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