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aleksklad [387]

3 years ago

9

The Brownian Motion prevents colloid particles from settling out of a solution. Please select the best answer from the choices p

rovided T F

1 answer:

KonstantinChe [14]3 years ago

7 0

The correct answer would be true

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What is the energy in joules of one photon of<br> microwaveradiation with a wavelength 0.122m?

pentagon [3]

<u>Answer:</u> The energy of photon is $162.93\times 10^{-26}J$

<u>Explanation:</u>

The relation between energy and wavelength of light is given by Planck's equation, which is:

$E=\frac{hc}{\lambda}$

where,

E = energy of the light = ?

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

c = speed of light = $3\times 10^8m/s$

$\lambda$ = wavelength of photon = 0.122 m

Putting values in above equation, we get:

$E=\frac{(6.626\times 10^{-34}Js)\times (3\times 10^8m/s)}{0.122m}\\\\E=162.93\times 10^{-26}J$

Hence, the energy of photon is $162.93\times 10^{-26}J$

3 0

3 years ago

Why a common measuring system is important

Gekata [30.6K]

So scientist around the world can share there info without having to convert and doing extra work.

6 0

3 years ago

For the reaction below , label each reactant as an electron pair acceptor or electron pair donor and as a Lewis acid or a Lewis

JulsSmile [24]

Since the reaction shown in the question is an acid - base reaction in the Lewis sense; the Lewis acid here is AlCl3 while the Lewis base here is Cl^- .

<h3>What is a Lewis acid?</h3>

A Lewis acid is a substance that accepts electron pair while a Lewis base donates an electron pair.

Now consider the given reaction; AlCl3 +Cl^- ------> AlCl 4 ^-. The Lewis acid here is AlCl3 while the Lewis base here is Cl^- .

Learn more about acid - base reaction: brainly.com/question/14356798

6 0

2 years ago

A 225-g sample of aluminum was heated to 125.5 oc, then placed into 500.0 g water at 22.5 oc. (the specific heat of aluminum is

Sidana [21]

when heat gained = heat lost

when AL is lost heat and water gain heat

∴ (M*C*ΔT)AL = (M*C*ΔT) water

when M(Al) is the mass of Al= 225g

C(Al) is the specific heat of Al = 0.9

ΔT(Al) = (125.5 - Tf)

and Mw is mass of water = 500g

Cw is the specific heat of water = 4.81

ΔT = (Tf - 22.5)

so by substitution:

∴225* 0.9 * ( 125.5 - Tf) = 500 * 4.81 * (Tf-22.5)

∴Tf = 30.5 °C

7 0

3 years ago

Read 2 more answers

Which statement explains how the Sun influences movement in the Earth's atmosphere?

MakcuM [25]

Correct Answer: The Sun heats the Earth unevenly; this heating pattern then causes convection currents in the atmosphere.

4 0

3 years ago