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Helga [31]
3 years ago
8

I do not know how is my answered

Chemistry
1 answer:
Afina-wow [57]3 years ago
4 0
What? I’m confused???????????????????????????
You might be interested in
Is
PIT_PIT [208]

Answer:

An observation

Explanation:  observation can also involve the perception and recording of data via the use of scientific instruments. The term may also refer to any data collected during the scientific activity

4 0
3 years ago
Calculate the energy of a photon of light with<br> a frequency of 5.109 × 1016 Hz.
lyudmila [28]

Answer:

The energy of the photon is 1.718×10−26J.

Explanation:

The energy of the photon is

1.718 × 10 − 26J. You use the formula  E =\frac{hc}{λ}, where h is Planck's Constant,c is the speed of light, and λ is the wavelength of the photon.

E=\frac{hc}{λ}=\frac{6.626×10−34J⋅ s×2.998×108m⋅s-1}{11.56m} = 1.718×10−26J.

4 0
3 years ago
When you open a bottle of soda,bubbles of carbon dioxide start appearing. Is this a chemical or physical change and why?
miss Akunina [59]
If bubbles aren't a for sure way of knowing a chemical reaction I don't know what is. But being for real, it is a chemical change because the bubbles are releasing carbon dioxide meaning it turned into a product from a reaction with outside forces.
6 0
4 years ago
Do you agree / disagree - Light is always the same, even when it is emitted by different light sources (like the sun and a light
Ilia_Sergeevich [38]

Answer:

She's right that there's a difference, and you are right that it's all just electromagnetic waves!

The key to this is that there is no such thing as "white light" when you really get down to it. Each light emits a range of wavelengths of light. If they have a sufficiently even distribution of wavelengths, we tend to call that light "white," but we can only use that term informally.

Both the sun and the light bulb emit so-called "Blackbody radiation." This is the particular spectrum of light that's associated with the random thermal emissions of a hot object. Cool objects tend to emit more of their energy in the longer wavelengths like reds and IRs, while hotter objects emit more energy in the shorter wavelengths like blues and UV.

Blackbody graphic

(Note, there are other possible emission spectra, but those are associated with different materials doing the emissions and, for the purposes of this discussion, they aren't too important. We can just claim the emissions are all blackbody)

If you notice, as you get hotter, a larger portion of the energy is emitted in the blue, violet, and ultraviolet. That's how you get a sunburn from the sun. It's harder to get a sunburn from an artificial light, not because it's artificial, but because those lights are almost always cooler than the sun. They don't have as much UV content. Instead, they have more red and yellow, which incidentally is why pictures taken indoors look very yellow. If you use a strobe, however, all those yellow hues go away because a strobe light is very warm, with lots of blues.

You can get a sunburn from artificial light, of course. Tanning beds are the obvious example, but there are other interesting ones. When you're a jeweler working in platinum, for instance, you need to wear UV protective gear (like glasses or even sunscreen). Platinum's melting point is so hot that it actually emits quite a lot of UV light and can give you a sunburn!

Other than these spectra, there is nothing different between light from an artificial source and light from the sun. Photons are photons.

Explanation:

PLEASS MARK ME AS BRAINLIEST

#STAY SAFE

4 0
3 years ago
Given the reactants of HNO3 + LiOH → predict the products *
lisabon 2012 [21]

Answer:

Lithium nitrate and water are product of given reaction.

Explanation:

Word equation:

Nitric acid + lithium hydroxide →  Lithium nitrate + water

Chemical equation:

HNO₃ + LiOH  →  LiNO₃ + H₂O

The given reaction is balanced. There are two hydrogen, four oxygen, one lithium and one nitrogen atoms are present on both side of equation.

This reaction completely follow the law of conservation of mass.

Law of conservation of mass:

According to the law of conservation mass, mass can neither be created nor destroyed in a chemical equation.

This law was given by french chemist  Antoine Lavoisier in 1789. According to this law mass of reactant and mass of product must be equal, because masses are not created or destroyed in a chemical reaction.

3 0
3 years ago
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