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3 years ago

After hydrogen bonding the strongest intermolecular force would be ___

1 answer:

mihalych1998 [28]3 years ago

6 0

The answer is van der Waal force, or to be precise, London dispersion forces.

This type of force is present between all molecules and they are caused by electrons that are orbiting the atom cores. The moving of the electrons can result in making the atom temporary dipole due to the asymmetry of electron distribution around the core. This temporary dipole now can interact with other atoms leading to an electrostatic interaction. The more electrons an atom has, the stronger are these intermolecular forces.

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Question 1 of 7

nlexa [21]

Answer:

Explanation:B ice melting is a phiyscal change and the mass of the substance remains the same

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2 years ago

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What would most likely happen if the moon was closer to Earth (take tides into consideration)?

Gekata [30.6K]

Answer:

Low tides would be lower and high tides would be higher and any low lying coastline would be flooded

Explanation:

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If the moon got about 20 times closer it would make a gravitational force 400 times greater than what we are used to now

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3 years ago

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1. An electric power plant uses energy from burning coal to generate steam at 450 °C. The plant is cooled by 20 °C water

kap26 [50]

Answer:

Explanation:

Efficiency of the electric power plant is $e=1-\frac{T_{2}}{T_{1}}$

Here Temperature of hot source $T_{1} = 450^{o}C=450+273=723 K$

and Temperature of sink $T_{1} = 20^{o}C=20+273=293 K$

Hence the efficiency is $e=1-\frac{293}{723}=0.5947=59.47%$

Now another formula for thermal efficiency Is

$e_{therm}=\frac{Q_{1}-Q_{2}}{Q_{1}}=\frac{W}{Q_{1}}$

Here QI is the of heat taken from source 100 MJ ; Q2 of heat transferred to the sink (river) to be found

W is the of work done and W = QI -Q2

Hence From $e_{therm}=\frac{Q_{1}-Q_{2}}{Q_{1}}=\frac{W}{Q_{1}}$

$W=e(Q_{1})=(0.5947)(100)=59.47MJ$

Hence the of heat transferred to the river Is $Q_{2} -W = (100 -59.47=40.53$

6 0

3 years ago

Good chemistry question

NeX [460]

Compared to the charge and mass of a proton an electron has......

A proton has approximately the same mass as..........

5 0

3 years ago

Need help, please. :)

wolverine [178]

A change of one unit on the pH scale represents a change in the concentration of hydrogen ions by a factor of 10, a change in two units represents a change in the concentration of hydrogen ions by a factor of 100. Thus, small changes in pH represent large changes in the concentrations of hydrogen ions.

6 0

2 years ago