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3 years ago

What is non lustrous ?

Chemistry

2 answers:

blondinia [14]3 years ago

6 0

Answer:

materials which do not show the quality of lustre i.e. shiney surface

for eg- non metals except Iodine

Explanation:

hope it helps u plz mark as the brainliest

Jobisdone [24]3 years ago

5 0

Answer:

These are materials that don't have lustre

Explanation:

They are not shiny.

They include non-metals but not iodine.

Hope it helps.

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What dose the wave carry

pogonyaev

Answer:

Waves carry energy from one place to another.

Because waves carry energy,some waves are used for communication,eg radio and television waves and mobile telephone signals.

Explanation:

i hope it helps

that's my answer

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<h3>#carryonlearning</h3>

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2 years ago

PLZZZZZ HELPPP THANK U 10 ptsssss

balandron [24]

Hi!

I think the oxidation state of all the atoms should change. :)

Hope this helps

6 0

3 years ago

Aluminum has a density of 2.70 g/cm3. what would be the mass of a sample whose volume is 10.0 cm3?

anastassius [24]

Hey there!

Density = 2.70 g/cm³

Volume = 10.0 cm³

Therefore:

Mass = density * volume

Mass = 2.70 * 10.0

Mass = 27.0 g

3 0

2 years ago

Plsplsplsplsplsplsplsplsplspls help

MA_775_DIABLO [31]

Answer:

this is difficult but simple to answer

Explanation:

all atoms move in 1 direction no more than 2

6 0

2 years ago

In IR spectroscopy, we normally talk about "frequencies" when in reality we are referring to wavenumbers. What is the mathematic

Svetach [21]

Answer:

Here's what I get.

Explanation:

(b) Wavenumber and wavelength

The wavenumber is the distance over which a cycle repeats, that is, it is the number of waves in a unit distance.

$\bar \nu = \dfrac{1}{\lambda}$

Thus, if λ = 3 µm,

$\bar \nu = \dfrac{1}{3 \times 10^{-6} \text{ m}}= 3.3 \times 10^{5}\text{ m}^{-1} = \textbf{3300 cm}^{-1}$

(a) Wavenumber and frequency

Since

λ = c/f and 1/λ = f/c

the relation between wavenumber and frequency is

$\bar \nu = \mathbf{\dfrac{f}{c}}$

Thus, if f = 90 THz

$\bar \nu = \dfrac{90 \times 10^{12} \text{ s}^{-1}}{3 \times 10^{8} \text{ m$\cdot$ s}^{-1}}= 3 \times 10^{5} \text{ m}^{-1} = \textbf{3000 cm}^{-1}$

(c) Units

(i) Frequency

The units are s⁻¹ or Hz.

(ii) Wavelength

The SI base unit is metres, but infrared wavelengths are usually measured in micrometres (roughly 2.5 µm to 20 µm).

(iii) Wavenumber

The SI base unit is m⁻¹, but infrared wavenumbers are usually measured in cm⁻¹ (roughly 4000 cm⁻¹ to 500 cm⁻¹).

8 0

3 years ago