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A catalyst used in a reaction remains unchanged

Answer:

Light Photons: Light behaves mainly like a wave but it can also be considered to consist of tiny packages of energy called photons. Photons carry a fixed amount of energy but have no mass. The energy of a photon depends on its wavelength: longer wavelength photons have less energy and shorter wavelength photons have more.

Infrared photons: Infrared waves, or infrared light, are part of the electromagnetic spectrum. People encounter Infrared waves every day; the human eye cannot see it, but humans can detect it as heat. A remote control uses light waves just beyond the visible spectrum of light—infrared light waves—to change channels on your TV.

On the electromagnetic spectrum, visible light has a wavelength that falls between 380 nm and 750 nm, whereas infrared light, which marks the beginning of the non-visible spectrum, has a wavelength that falls between 700 nm and 1 mm. Because of this, infrared can only be viewed with specialized tools like security cameras.

A type of radiant energy that we experience as heat, but that is invisible to human eyes is infrared radiation (IR), often known as infrared light. The sun and fire are two of the most prominent sources of IR radiation, however all objects in the cosmos release some of it.

The energy of the photons determines the various types of radiation, starting with radio waves with low energies. In comparison to visible, ultraviolet, X-ray, and gamma ray photons, which are the most energetic of all, microwave photons have somewhat higher energy. Infrared photons have even more energy.

Cooler objects produce lower energy, longer wavelength photons, while hotter ones release higher energy, shorter wavelength photons.

Thus, On the electromagnetic spectrum, visible light has a wavelength that falls between 380 nm and 750 nm, whereas infrared light.

To learn more about infrared light, follow the link;

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Answer:

A vacuum flask (also known as a Dewar flask, Dewar bottle or thermos) is an insulating storage vessel that greatly lengthens the time over which its contents remain hotter or cooler than the flask's surroundings. Invented by Sir James Dewar in 1892, the vacuum flask consists of two flasks, placed one within the other and joined at the neck. The gap between the two flasks is partially evacuated of air, creating a near-vacuum which significantly reduces heat transfer by conduction or convection.



The typical design of a Thermos brand vacuum flask, used for maintaining the temperature of fluids such as coffee.



Laboratory Dewar flask, Deutsches Museum, Munich



Diagram of a vacuum flask



A cryogenic storage dewar of liquid nitrogen, used to supply a cryogenic freezer

Vacuum flasks are used domestically, to keep beverages hot or cold for extended periods of time, and for many purposes in industry.

pls make me as brainliest

Answer:

b

Explanation:

b. ,u play with the ball, handle the ball grab the ball throw the ball exc.

Answer:

The Answer is B

Explanation:

Fossil fuels take millions of years to be made, and every other answer doesn't make sense

Answer:

[OH-] = 1.8 x 10^-7

Explanation:

pH + pOH = 14 --> 6.93 + pOH = 14 *subtract 6.93 from both sides

pOH = 7.07

-->

10^pH => 10^-6.93 => 1e - 6.93 [H+]

-->

H+ x OH- = 1 x 10^-6.93 *divide H+ from both sides

-->

[OH-] = 1.17 x 10^-7 or 1.8 x 10^-7

Answer:

a= 7.07 m/s^2

Explanation:

Newton's second law of motion states that the acceleration of an object is produced by the net force.

the formula to calculate the force: F=ma

you just rearrange it to solve for a

a= F/m a=223/31.5

=7.07

Answer:

The increase in the reverse reaction

Explanation:

Based on the LeCh's principle, a change in the concentration of a species in the equilibrium will shift the concentrations of the other species in order to counteract the effect of this change.

For example, for the reaction:

A + B ⇌ AB

Remove A in this reaction will produce the increase in the reverse reaction in order to increase the concentration of A.

Answer:

a)0.50

Explanation:

took one for the team :

Answer:

Answer:

23 L

Explanation:

We'll begin by converting celsius temperature to Kelvin temperature. This can be obtained as follow:

T(K) = T(°C) + 273

Initial temperature (T₁) = 100 °C

Initial temperature (T₁) = 100 °C + 273

Initial temperature (T₁) = 373 K

Final temperature (T₂) = 50.5 °C

Final temperature (T₂) = 50.5 °C + 273

Final temperature (T₂) = 323.5 K

Finally, we shall determine the initial volume of gas. This can be obtained as follow:

Initial temperature (T₁) = 373 K

Final temperature (T₂) = 323.5 K

Final volume (V₂) = 20 L

Initial volume (V₁) =?

V₁/T₁ = V₂/T₂

V₁ / 373 = 20 / 323.5

Cross multiply

V₁ × 323.5 = 373 × 20

V₁ × 323.5 = 7460

Divide both side by 323.5

V₁ = 7460 / 323.5

V₁ = 23 L

Thus, the original volume of the gas is 23 L

Answer:

Sulfur molecules

Explanation:

Chemosynthesis can be defined as the process of producing the energy rich nutrients molecules from the chemicals. The chemosynthesis bacteria are those bacteria that are capable of absorbing chemicals from the ocean floor like hydrogen sulfide.

Thus it is a process of making energy rich molecules using the chemical energies.

In the context, sulfur molecules are the sources of energy for the process of chemosynthesis.

Answer: Red-Shift

Explanation:

It suggests that the universe is expanding, as distant stars/galaxies must be in motion away from us to cause the light to shift towards the red end of the spectrum (or into longer wavelengths of the EM spectrum). This agrees with the Big bang theory as that suggests the universe is expanding.

Answer:

2 significant figures

Explanation:

0.19312

0.19 or 0.2

2AgCl (s) + Ba(NO3)2 (aq)

The breakdown or dissolution of rocks and minerals of the planet's surface is called weathering it can be chemical, biological or physical.

Chemical weathering occurs in regions with high rainfall and high temperature.

Therefore, Albany will have mechanical while Washington will suffer from chemical weathering.

To learn more about weathering types follow the link:

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Answer:

Answered B

Explanation:

The earth moves which makes the stars and everything in space seem like its moving

Answer:

Explanation:

THE PLANET NAME IS NEPTUNE

Answer:

Explanation:

Look at the reaction.

2NH3 ===> N2 + 3H2

It's a molecule that is breaking down to two elements on the periodic table. We used to call such a thing as a simple decomposition.

Answer:

Explained below.

Explanation:

What has changed in the atmosphere is that oxidation has occurred where an oxidizing chemical specie has reacted with an oxygen containing compound.

Now these chemicals when they react with rain and fall on rocks react with the rocks to weaken them in a process known as chemical weathering.

Now when this weathering from the oxidizing chemicals from the rain react with rocks that contain iron, it leads to the rock having an appearance of rust.

Answer:

A) the NaI solution will have a higher boiling point than the KI solution

Explanation:

We must have it behind our minds that the addition of a solute to water elevates the boiling point of water.

Boiling point elevation is a colligative property. It depends on the amount of solute present.

We know that;

ΔTb = Kb m i

Where;

ΔTb = boiling point elevation

Kb = boiling point constant

m = molality

i = Van't Hoff factor

Since KI and NaI has the same number of particles(two particles each), the boiling point elevation (ΔTb) depends on the molality of each solution. The molality also depends on the molar mass of each substance. The molality of NaI is greater than the molality of KI hence the boiling point NaI is greater than the boiling point of KI.

So;

200mL of water = 200g of water

Mass of solvent = 200g/1000 = 0.2 Kg

Molality of NaI = 5g/150 g/mol * 1/0.2 = 0.167 m

molality of KI = 5g/166 * 1/0.2 = 0.151 m

Kb for water = 0.512 oC m-1

Boiling point of water = 100 oC

Let the boiling point of NaI be A

A - 100 = 0.512 *  0.167  * 2

A = (0.512 *  0.167  * 2) + 100

A = 100.171 oC

Let the boiling point of KI be B

B - 100 = 0.512 * 0.151  *  2

B = (0.512 * 0.151  *  2) + 100

B = 100.154 oC

Hence;

Boiling point of NaI > Boiling point of KI

Answer:

c) NOx and VOC

oxides of nitrogen (NOx) and volatile organic compounds (VOC)

Explanation:

-

Answer:

1.03 atm

Explanation:

Primero convertimos 21 °C y 37 °C a K:

Una vez tenemos las temperaturas absolutas, podemos resolver este problema usando la ley de Gay-Lussac:

En este caso:

Colocando los datos:

Y despejando P₂:

Answer:

Any substance which occupies space and has mass is known as matter. States of matter: Matter exist in three different states that are Solid, Liquid and Gas. Matter is made up of very small particles

Explanation:

Answer:688

Explanation:

Answer:

S8+8o2 = 8so2

this is balance d

Explanation:

[tex] \frac{P _{1} V _{1} }{T _{2}} = \frac{P _{2} V _{2}}{T _{1}} \\ \frac{(101300 \times 7)}{(21.5 + 273)} = \frac{(101300 \times 4)}{T _{2}} \\ T _{2} = \frac{(405200 \times 294.5)}{(709100)} \\ T _{2} = 168.3 \: kelvin \\ decrease \: in \: temperature = (294.5 - 168.3) \\ = 126.2 \: kelvin[/tex]

Answer:

Explanation:

HYDRONIUM

Answer:

hydronium

Explanation:

:0

Answer:

Carbon and oxygen combine to form two oxides, carbon monoxide and carbon dioxide in which the ratio of the weights of carbon and oxygen is respectively 12:16 and 12:32.