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3 years ago

9

What is the pH value of lithium chloride?

1 answer:

Fiesta28 [93]3 years ago

5 0

Answer:

<h2>0.0003</h2>

<h2>HERE IS YOUR ANSWER </h2>

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Why is CCl4 classified as a non polar molecule?

Lerok [7]

<span>CCl4 is a non polar molecule because though each of the C-Cl bond is polar but the resultant of all these dipole moments is zero as its a symmetrical tetrahedral shape molecule ,and their is a cancellation of dipole moment in each pair.</span>

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3 years ago

Which type of severe weather is NOT an intense tropical storm?

SVETLANKA909090 [29]

Answer: B. Tornado

Explanation: <u>A tornado is a violent rotating column of air extending from a thunderstorm to the ground. The most violent tornadoes are capable of tremendous destruction with wind speeds of up to 300 mph. They can destroy large buildings, uproot trees and hurl vehicles hundreds of yards. They can also drive straw into trees.</u>

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3 years ago

Please ignore my answers because they are wrong.

earnstyle [38]

Answer:

The wavelength of the radio wave is 3.003 m.

The energy of the radio wave is $6.6194\times 10^{-26} J$ .

Explanation:

Frequency of the radio waves, ν = 99.9 MHz = $99.9\times 10^6 Hz$

Wavelength and frequency are related to each other by realtion:

$\lambda =\frac{c}{\nu }$

$\lambda$ = Wavelength of the wave

c = speed of the light

ν = Frequency of the wave

$\lambda =\frac{3\times 10^8 m/s}{99.9\times 10^6 s^{-1}}=3.003 m$

The wavelength of the radio wave is 3.003 m.

The energy of the electromagnetic wave is given by Planck's equation:

$E=h\times \nu$

h = Planck's constant = $6.626\times 10^{-34} Js$

The energy of the radio wave with 99.9 MHz frequency will be:

$E=6.626\times 10^{-34} Js\times 99.9\times 10^6 s^{-1}$

$E = 6.6194\times 10^{-26} J$

The energy of the radio wave is $6.6194\times 10^{-26} J$ .

4 0

3 years ago

The density of an object is 1.23 g/cm3. In which of the following materials will it float?

BartSMP [9]

In order to float the demsoty of the floating obkect must be lower then the liquid it is in. the only one that works for is Citric acid

7 0

3 years ago

Read 2 more answers

A solution is prepared by dissolving 38.6 g sucrose (C12H22O11) in 495 g of water. Determine the mole fraction of sucrose if the

EastWind [94]

Answer:

$x_{suc}=0.00406$

Explanation:

Hello!

In this case, since the mole fraction relates the moles of solute and the moles of solution, and for sucrose it is:

$x_{suc}=\frac{n_{suc}}{n_{suc}+n_{water}}$

Whereas we need to compute the moles of both sucrose and water based on their molar masses (342.3 and 18.02 respectively) as shown below:

$n_{suc}}=\frac{38.6g}{342.3g/mol}=0.113mol\\\\ n_{water}}=\frac{495g}{18.02g/mol}=27.5mol\\$

Thus, the mole fraction sucrose turns out:

$x_{suc}=\frac{0.112}{0.112+27.5}\\\\x_{suc}=0.00406$

Best regards!

7 0

3 years ago