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Elena L [17]
2 years ago
6

(2k-1)² what the answer pls.​

Chemistry
1 answer:
Sedaia [141]2 years ago
7 0

Answer:

4k^2-4k+1

Explanation:

Plx give brainlyest

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Which statement is correct about molarity and volume?
Oksana_A [137]

Answer:

Explanation:

If the choices are:

A. Molarity is defined as moles of solute per liter of solvent.

B. % by mass is defined as grams of solute per 100 g of solvent.

C. % by volume is defined as grams of solute per 100 L of solution.

D. Molarity is defined as moles of solute per liter of solution.

E. All of the above.

then the ans is E

7 0
2 years ago
Every afternoon, Bill and Anita go down to the beach to fly their kite. They noticed that the wind always blows towards shore. W
EastWind [94]

Answer:

the answer is D

Explanation:

Air over the beach heats up, rises, and is replaced by cool, denser ocean air

The ocean heats up much slower and becomes relatively cooler than the beach making it a high pressure zone. The air moves from the water to the land each morning forming a sea breeze. These pressure zones might equal out later in the day and the winds may diminish. ... A sea breeze blows from the ocean towards the beach.

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3 years ago
The quantity 0.202 g has _____________________________ significant<br> figures.
andreyandreev [35.5K]
0.202g has 3 sigfigs
7 0
2 years ago
I need help someone plsss answer!!<br><br>​
Papessa [141]

Answer:

c

Explanation:

4 0
3 years ago
Read 2 more answers
For which of the following transitions would a hydrogen atom absorb a photon with the longest wavelength?
Talja [164]

Answer:

Hence among the options a and c, option d is that the correct answer because it has rock bottom energy ( as n value increases, energy decreases as energy levels come closer).

Explanation:

The relation between energy and wavelength is:

\Lambda = hC/E  

From this equation, it's clear that wavelength and energy are inversely proportional to every other. The Lower the energy of a specific transition, the longest will the wavelength be of that specific transition.  

Among the given options, options b and d are often ruled out, since those transitions produce to release of a photon because it is coming down from an excited state.

5 0
2 years ago
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