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olga55 [171]
3 years ago
7

The ease with which the charge distribution in a molecule can be distorted by an external electric field is called the___. A) el

ectronegativity B) hydrogen bonding C) polarizability D) volatility E) viscosity The intermolecular force(s) responsible for the fact that CH_4 has the lowest boiling point in the set CH_4, SiH_4, CeH_4, SnH_4 is/are___. A) hydrogen bonding B) dipole-dipole interactions C) London dispersion forces D) mainly hydrogen bonding but also dipole-dipole interactions E) mainly London-dispersion forces but also dipole-dipole interactions Of the following substances, only_____ has London dispersion forces as the only intermolecular force A) CH_3 OH B) NH_3 D)Kr E) HCI In liquids, the attractive intermolecular forces are___. A) very weak compared with kinetic energies of the molecules B) strong enough to hold molecules relatively close together C) strong enough to keep the molecules confined to vibrating about their fixed lattice points D) not strong enough to keep molecules from moving past each other E) strong enough to hold molecules relatively close together but not strong enough to keep molecules from moving past each other
Chemistry
1 answer:
muminat3 years ago
4 0

Answer:

Question 1

C) polarizability

Question 2

C) London dispersion forces

Question 3:

D)Kr

Question 4:

E) strong enough to hold molecules relatively close together but not strong enough to keep molecules from moving past each other

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Wittaler [7]

Answer:

Re=2094,76

Explanation:

For a fluid that circulates inside a straight circular pipe, the Reynolds number is given by:

Re=\frac{pvD}{u}

where (using the international measurement system):

  • ρ: density of the fluid [kg/m3]
  • v: velocity of the fluid [m/s]
  • D: diameter of the pipe through which the fluid circulates [m]
  • μ: dynamic viscosity [Pa.s]

To solve the probelm, we just need to replace our data using <u>THE CORRECT UNITS</u> in the Reynolds number equation. So we have:

ρ=1051 kg/m3,

v=34,3 cm/s=0,343 m/s

D=2,15 cm = 0,0215 m

μ = 3,7 cp * 10^-3 Pa.s/1 cp = 3,7*10^-3 Pa.s

Replacing in the main equation:

Re=\frac{1051\frac{kg}{m^{3} }*0,343\frac{m}{s}*0,0215m  }{3,7*10^{-3}Pa.s } =2094,76

So the Reynolds number is 2094,76 (note that the Reynolds number is a dimensionless quantity).

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3 years ago
What is the cell wall &amp; the chloroplasts?
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The cell wall is mixed with the cell membrane, the cell wall is outside of the membrane and the cell membrane is letter i which allows materials to pass in and out of the cell.

Chloroplasts are letter k they basically just help the plant use photosynthesis.

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chloroplasts: k

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D
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  • If water had been supplied, the equilibrium would have shifted extremely far to the left, preventing the reactants from interacting with the acid and favoring the yield of 1-bromobutane instead.
<h3>What is Bromination?</h3>
  • When a substance undergoes bromination, bromine is added to the compound as a result of the chemical reaction.
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