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2 years ago

Key Questions and Terms Notes

Chemistry

1 answer:

Elanso [62]2 years ago

5 0

Answer:

Following are the solution to the given question:

Explanation:

Its interactions among light waves as well as different media were also called light products.
Even before sound rays hit a medium, the light rays bounce off.
Even at a similar angle with which the material initially struck its medium, sunlight reflecting.
When the light hits a mirror at such an angle of forty degrees, everything just rebonds at an angle of 40 degrees.
When light waves pass via a transparent medium, those who bend as well as change their direction.
Light is called transparent if it can pass via an object.
Whenever light waves strike a platform, this is neither re-elected nor refracted, nor expected to move.
The light of interacts with these materials are:

Reflection Mirror:

Water glass: refractive

Dark fabricate: Absorption

Sound waves and waves of water are examples of matter waves.
Light waves and X-rays are electromagnetic waves.
There is no need for sound radiation to pass through a medium/requirement to communicate with other particles to travel like waves of matter.
No, even though sound waves didn't reach through the space vacuum.
Matter waves should interact with solid, liquid, or gas particulates to travel.

The light waves pass thru the air more quickly than sound waves.

Sound waves almost always go through a metal frame.

Light waves travel faster than electrical signals even though they don't have to crash in electromagnetic waves to particles.

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Digiron [165]

Answer:

The film stars Will Ferrell, Amy Poehler, Jason Mantzoukas, Ryan Simpkins, Nick Kroll, Allison Tolman, Rob Huebel, Michaela Watkins, and Jeremy Renner, and follows a couple who open an underground casino in their friend's house in order to pay for their daughter's college tuition.

Explanation:

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3 years ago

A 48.3 mL sample of gas in a cylinder is warmed from 22 C, 87 C to 0.0 C what is the final temperature

snow_lady [41]

The answer is:

the volume stays the same. it is the pressure that increases

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3 years ago

A) Name the following compounds CH, -CH-CH (i) CH, Br -

liq [111]

Answer:

methyl, ethyl,

Explanation:

that should be the case

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2 years ago

At an elevated temperature, Kp=4.2 x 10^-9 for the reaction 2HBr (g)---> +H2(g) + Br2 (g). If the initial partial pressures o

Damm [24]

Answer : The partial pressure of $H_2$ at equilibrium is, 1.0 × 10⁻⁶

Explanation :

The partial pressure of $HBr$ = $1.0\times 10^{-2}atm$

The partial pressure of $H_2$ = $2.0\times 10^{-4}atm$

The partial pressure of $Br_2$ = $2.0\times 10^{-4}atm$

$K_p=4.2\times 10^{-9}$

The balanced equilibrium reaction is,

$2HBr(g)\rightleftharpoons H_2(g)+Br_2(g)$

Initial pressure 1.0×10⁻² 2.0×10⁻⁴ 2.0×10⁻⁴

At eqm. (1.0×10⁻²-2p) (2.0×10⁻⁴+p) (2.0×10⁻⁴+p)

The expression of equilibrium constant $K_p$ for the reaction will be:

$K_p=\frac{(p_{H_2})(p_{Br_2})}{(p_{HBr})^2}$

Now put all the values in this expression, we get :

$4.2\times 10^{-9}=\frac{(2.0\times 10^{-4}+p)(2.0\times 10^{-4}+p)}{(1.0\times 10^{-2}-2p)^2}$

$p=-1.99\times 10^{-4}$

The partial pressure of $H_2$ at equilibrium = (2.0×10⁻⁴+(-1.99×10⁻⁴) )= 1.0 × 10⁻⁶

Therefore, the partial pressure of $H_2$ at equilibrium is, 1.0 × 10⁻⁶

4 0

3 years ago

(a) Write the dissolution reaction for solid Na2CO3 below. (Use the lowest possible coefficients. Include states-of-matter under

Andreas93 [3]

Answer:

For a: The chemical equation for the dissolution of sodium carbonate is $Na_2CO_3(s)\rightarrow Na_2CO_3(aq.)$

For b: The net acid-base reaction is $CO_3^{2-}(aq.)+H_2O(l)\rightarrow OH^-(aq.)+HCO_3^-(aq.)$

Explanation:

For a:

Dissolution reaction is defined as the reaction in which a solid compound gets dissolved in water to form aqueous solution.

The chemical equation for the dissolution of sodium carbonate follows:

$Na_2CO_3(s)\rightarrow Na_2CO_3(aq.)$

Ionization reaction is defined as the reaction in which an ionic compound dissociates into its ions when dissolved in aqueous solution.

The chemical equation for the ionization of sodium carbonate follows:

$Na_2CO_3(aq.)\rightarrow 2Na^+(aq.)+CO_3^{3-}(aq.)$

For b:

Now, the anion formed which is $CO_3^{2-}$ reacts with water to form conjugate acid.

The chemical equation for the reaction of anion with water follows:

$CO_3^{2-}(aq.)+H_2O(l)\rightarrow OH^-(aq.)+HCO_3^-(aq.)$

Hence, the net acid-base reaction of the anion formed and water is written above.

3 0

3 years ago