Which type of bond makes it possible for a macromolecule to interact with great specificity with just one out of the many thousands of different molecules present inside a cell? A. Covalent bonds B. Noncovalent bonds C. Hydrogen bonds D. Ionic bonds
Solution 1
Answer: Non covalent interactions.
Explanation: The non covalent interactions can be defined as the interaction among molecules based on the variation among the electromagnetic radiations.
These molecules are not attached to each other based on the sharing of the electrons.
These interactions are Van der Waals, electrostatic, hydrophobic interactions.
The interaction among the molecules is important in order to maintain the three dimensional structure of compound such as carbohydrates and protein molecules.
📚 Related Questions
Colligative properties depend on the amount of solute dissolved in a solvent. These set of properties do not depend on the type of species present. These properties include freezing point depression, boiling point elevation, osmotic pressure and vapor pressure lowering. The correct answer is the last option. The solution which has the highest amount of solute or the 2.0 m NaCl solution will have lower freezing point than the other given choices.
Answer: 2.0 M NaCl
Explanation: :)
Answer:
Sodium is a silvery-white metal that reacts with chlorine gas, which is a yellow-greenish gas that is toxic. The  reaction gives off a lot of heat. After the reaction, which statement is true about the chemical properties of the product, sodium chloride?
Pure sodium reacts violently and sometimes explosively with water producing sodium hydroxide, hydrogen gas and heat
2Na(s) + 2H2O(l) → 2NaOH(aq) + H2(g)
Chlorine is a very poisonous yellow green gas with a sharp odour that was used in gas warfare during WW1
Sodium and chlorine reacts with each other, however, to produce one of the most familiar substance used in cooking and preservation industry today Sodium Chloride or Common salt or table salt in the irreversible equation;
2Na(s) + Cl2(g) → 2NaCl(s)
Explanation:
It is easy to see why this reaction takes place so readily sodium has one electron in its outermost valence shell while chlorine has seven electrons in its valence shell. when sodium atom transfers one electron to chlorine atom forming a sodium cation (Na+) and a chloride anion (Cl-) both ions have complete valence shells and are energetically more stable. the reaction is extremely exothermic, producing a bright yellow light and a great deal of heat and fumes of sodium chloride.
In a reaction observation of the reaction process you will see sodium flares up almost immediately upon reaction with water.
Answer:
mass of acetone added:
w acetone = 21.676 g
Explanation:
decrease in vapor pressure:
- ΔP = - (P*a)(Xb,l)
∴ ΔP = - 1.576 KPa = Pa - P*a
∴ a: water (solvent)
∴ b: C3H6O (solute)
∴ P*a (65°C) = 25.022 KPa
⇒ ΔP/(- P*a) = Xb,l
⇒ Xb.l = - 1.576 KPa/(- 25.022 KPa) = 0.063
∴ Xb = nb/nt = nb/(na + nb) = (wb/Mb)/[(wa/Ma) + (wb/Mb)]
∴ Mb = 58.08 g/mol (molar mass acetone)
∴ Ma = 18.015 g/mol (molar mass water)
∴ wa = 100 g
⇒ 0.063 = (wb/58.08)/[(100/18.015) + (wb/58.08)]
⇒ (0.063)[(5.55 + (wb/58.08)] = wb/58.08
⇒ 0.3497 + 1.085 E-3wb = wb/58.08
⇒ 20.3106 + 0.063wb = wb
⇒ 20.3106 = wb - 0.063wb
⇒ 20.3106 = 0.937wb
⇒ 20.3106/0.937 = wb
⇒ 21.676 g = wb
Answer:
By measuring it's Radical velocity using Doppler Phenomenon...
Explanation:
It is done by measuring the absorption spectrum produces by a star as a result of measuring Doppler's relative wavelength. The star with the lower speed must have lower absorption spectrum extent as compared to the faster one.
Answer:
mm = 78.329 g/mol
Explanation:
osmotic pressure (Ï€):
- π = Cb*R*T
∴ a: water (solvent)
∴ b: solute nonelectrolytic
∴ Cb [=] mol/L
∴ π = (2.49E2 torr)*(atm/760 torr) = 0.3276 atm
∴ wb = 0.314 g
∴ T = 21.0°C = 294 K
∴ R = 0.082 atm.L/K.mol
∴ molar mass [=] g/mol
⇒ Cb = π/RT
⇒ Cb = (0.3276 atm)/[(0.082 atm.L/K.mol)(294 K)]
⇒ Cb = 0.0136 mol/L
⇒ moles solute (nb) = (0.0136 mol/L)*(2.95E2 mL)*(L/1000 mL)
⇒ nb = 4.01 E-3 mol
∴ molar mass (mm):
⇒ mm = (0.314 g)/(4.01 E-3 mol)
⇒ mm = 78.329 g/mol
The freezing point depression is -1.3 °C for a solution of 35.9 g of a 3.3 × 10² g/mol solute in 150.0 g of water.
What is the freezing point depression?
Freezing point depression (ΔT) is a colligative property observed in solutions that results from the introduction of solute molecules to a solvent.
The freezing points of solutions are all lower than that of the pure solvent and are directly proportional to the molality of the solute.
ΔT = i × Kf × m
m = ΔT / i × Kf
m = (1.3 °C) / 1 × (1.86 °C/m) = 0.70 m
where,
- i is the van 't Hoff factor (1 for nonelectrolytes).
- Kf is the cryoscopic constant (1.86 °C/m for water).
- m is the molality of the solution.
Since the 0.70 m solution has 150.0 g (0.1500 kg) of water, we will use the definition of molality to calculate the moles of solute.
m = moles of solute / kg of solvent
moles of solute = m × kg of solvent = 0.70 mol/kg × 0.1500 kg = 0.11 mol
0.11 moles of solute have a mass of 35.9 g. The molar mass of the solute is:
M = 35.9 g/0.11 mol = 3.3 × 10² g/mol
The freezing point depression is -1.3 °C for a solution of 35.9 g of a 3.3 × 10² g/mol solute in 150.0 g of water.
Learn more about freezing point depression here: brainly.com/question/14115775
Answer:
molr mass (mm):
mm = 342.43 g/mol
Explanation:
freezing point (ΔTf):
- ΔTf = - Kf*mb
∴ ΔTf = - 1.3°C
∴ a: water (solvent)
∴ b: solute
∴ mb: molality of the solute [=] mol/Kg
∴ Kf: cryoscopic constant
⇒ Kf water = 1.86 °C.Kg/mol
∴ wb = 35.9 g
∴ wa = 150.0 g = 0.150 Kg
∴ molar mass solute (mm) [=] g/mol
⇒ mb = - ΔTf/Kf
⇒ mb = - ( - 1.3°C)/(1.86 °CKg/mol)
⇒ mb = 0.6989 mol/Kg
∴ moles solute (nb):
⇒ nb = (0.6989 mol/Kg)(0.150 Kg) = 0.1048 mol
molar mass:
⇒ mm = (35.9 g)/(0.1048 mol) = 342.43 g/mol
Answer:
Endothermic reaction chemical equation
Reactnt A + Reactant B + Heat (energy) ⇒ Products
Exothermic reaction chemical equation
Reactnt A + Reactant B ⇒ Products + Heat (energy)
Explanation:
Endothermic Reaction
An endothermic reaction is a reaction that reaction that requires heat before it would take place resulting in the absorption of heat from the surrounding that can be sensed by the coolness of the reacting system
An example of an endothermic reaction is a chemical cold pack that becomes cold when the chemical and water inside it reacts
Exothermic Reaction
An exothermic reaction is one that rekeases energy to the surroundings when it takes place. This is as a result of the fact that the combined heat energy of the reactants is more than the chemical heat energy of the products. An example of an exothermic reaction is a burning candle
Answer:
Condenser
Explanation:
Condenser is highly efficient when dealing with the vapors of the product are need to be liquified. It is mostly automated and regularly condenses the incoming vapors into liquid. It is very easy to use. All we have to do it to attach incoming and outgoing flow pipes and constantly monitor the flow of cold water through the condenser. It is made up of special kind of PYREX glass so that it won't break when dealing with steam.
Answer:
The correct answer is option D) Scientists can date any radioactive material back only three half-lives; after this, there's not enough parent material left to measure.
Explanation:
It is true that the exact date of a radioactive material which is known to be unstable cannot be precisely determined due to loss of parent material. The radiometric clock takes a while to swing into action because of high temperatures. It begins after a while when the closure temperature of a radioactive material drops to the barest minimum. At this point, Scientists can date any radioactive material back only three half-lives because most of  the parent material needed for the experiment will not remain.