Identify the chiral carbon in amphetamine (benzedrine)
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In Amphetamine, there is only 1 carbon that have 4 different types of atoms, so there is only 1 Chiral Carbon in it which have 2 optical isomers :
PhCH2CH(NH2)CH3
Related Questions
C6h6is an example of an
In going across a row of the periodic table, protons and electrons are added and ionization energy generally increases. In going down a column of the periodic table, protons and electrons are also being added but ionization generally decreases. Explain.
A sample of an unknown substance has a mass of 89.5 g. If 345.2 J of heat are required to heat the substance from 285 K to 305 K, what is the specific heat of the substance?
The element with 8 electrons in its 3d sublevel isa. O. b. Ne. c. Ar. d. Ni.
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A candle placed between two plane mirrors inclined at an angle of 45 degrees will form 7 images. This is due to multiple reflections between the mirrors. The number of images depends on the angle between the mirrors.
In physics, when a candle is placed between two plane mirrors inclined at an angle of 45 degrees, 7 images will be formed. This happens due to multiple reflections between the mirrors. As per the formula for number of images n = 360/θ - 1, where θ is the angle between the mirrors, for an angle of 45 degrees, we get n = 360/45 - 1 = 7. The actual number of images can be less than this if they overlap each other.
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lactase lowers the activation energy needed to begin breaking down lactose.
lactase releases heat during the breakdown of lactose.
lactase prevents too many disaccharide molecules from clumping together during chemical reactions
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The lactase enzyme lowers the activation energy required to begin breaking down lactose. Therefore, option (B) is correct.
What is lactase enzyme?
The lactase enzyme is a part of the β-galactosidase family, found along the membrane of villi in the small intestine.
In the human body, the optimum temperature and pH for lactase are 37 ° C and 6 pH respectively. Lactase helps in the complete digestion of milk in the small intestine in the human body.
The lactase enzyme catalyzes the hydrolysis of the β-glycosidic bond of D-lactose. After the completion of the hydrolysis, D-glucose and D-galactose are obtained.
The lactase provides the path of low activation energy to initiate the breakdown of the lactose.
Therefore, option (B) is correct that lactase lowers the activation energy.
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The liters of sea water must evaporate to produce 5.00 moles of magnesium hydroxide - 78.8 litres.
A mole is a special unit of quantity of a chemical species that contains exactly Avogadro's number of particles.
- The mass of one mole of an element or a compound, called the molar mass, can be found from a periodic table.
- The unit of molar mass is g/mol.
=> the molar mass of Mg(OH)₂
Mg + 2O + 2H
= (24.31) + (2×16) + (2×1.01)
= 58.33 gmol⁻¹.
then,
=> the number of moles:
n = m/M
=
= 0.0634 mol
=> the amount of water in liters needed to evapourate to produce 5.00 moles:
=>
=> 0.0634x = 5×1
=>
=> x = 78.8 litres.
Thus, the liters of sea water must evaporate to produce 5.00 moles of magnesium hydroxide - 78.8 litres.
learn more:
First we find the molar mass of Mg(OH)₂
Mg + 2O + 2H = 24.31 + 2×16 + 2×1.01 = 58.33 gmol⁻¹.
Then find the number of moles: n = m/M = 3.7 / 58.33 = 0.0634 mol
So now we know that 0.0634 mol are produced per litre of sea water.
Let the amount of water in litres needed to evapourate to produce 5.00 moles be x.
We can express this as a ratio.
0.0634 mol / 1 l = 5 mol / x l.
Solve for x by cross-multiplication:
0.0634x = 5×1
x = 5/0.0634 = 78.8 litres. (rounded to three significant figures)
Hope this helps!
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Answer:it is 580
Explanation:
I had the answer on my quiz
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FALSE. IT IS MADE OF COPPER THAT IS WHY IT HAS A GREEN TENT.
Assume the CaCI2 dissolves completely in the water.. The density of water at 25.0°C is 0.997 g/L, and the KF of H20 is 1.858°C kg/mol.
Answers
Answer:
-4741 °C
Something is strange, because this is a weird number.
Explanation:
ΔT = Kf . m. i
That's the colligative property of freezing point depression.
Kf = Cyroscopic constant
m = molality (moles of solute in 1kg of solvent)
i = Van't Hoff factor (numbers of ions dissolved)
We assume 100% dissociation:
CaCl₂ → Ca²⁺ + 2Cl⁻ i = 3
ΔT = Freezing point of pure solvent - Freezing point of solution
Let's determine molality
Solute = CaCl₂
Moles of solute = 23.5 g . 1 mol/ 110.98 g = 0.212 moles
We determine the mass of solvent by density. Density's data is in g/L. We need to convert the volume from mL to L
250 mL . 1L / 1000 mL = 0.250 L
0.997 g/L = mass of water / volume of water → 0.997 g/L . volume of water = mass of water
0.997 g/L . 0.250L = 0.249 g
Now, we convert the mass of water from g to kg
0.249 g . 1 kg / 1000 g = 2.49×10⁻⁴ kg
Molality = mol/kg → 0.212 mol / 2.49×10⁻⁴ kg = 850.5 m
We replace data:
0°C - Freezing point of solution = 1.858 °C . kg /mol . 850.5 mol/kg . 3
Freezing point of solution = -4741 °C
Answer:
The freezing point of the solution is -4.74 °C
Explanation:
Step 1: data given
Mass of calcium chloride CaCl2 = 23.50 grams
Step 2: Calculate moles CaCl2
Moles CaCl2 = mass CaCl2 / molar mass CaCl2
Moles CaCl2 = 23.50 grams / 110.98 g/mol
Moles CaCl2 = 0.212 moles
Step 3: Calculate mass H2O
Density = mass / volume
Mass = density * volume
Mass H2O = 997 g/L * 0.250 L
MAss H2O = 249.25 grams
Step 3: calculate molality of the solution
Molality = moles CaCl2 / mass H2O
Molality = 0.212 moles / 0.24925 kg
Molality = 0.851 molal
ΔT = i*Kf*m
⇒with ΔT = the freezing point depression = TO BE DETERMNED
⇒ with i = the van't Hoff factor = 3
⇒with Kf = the freezing point depression constant of water = 1.858 °C /m
⇒with m = the molality = moles CaCl2 / mass water = 0.851 molal
ΔT = 3 * 1.858 * 0.851
ΔT = 4.74 °C
Step 4: Calculate the freezing point of the solution
ΔT = T (pure solvent) − T (solution)
ΔT = 0°C - 4.74 °C
The freezing point of the solution is -4.74 °C
NOTE: the density of water = 0.997 kg/L or 997 g/L