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katrin2010 [14]

3 years ago

6

Worth 47 POINTS!!!

1 answer:

Elena-2011 [213]3 years ago

4 0

Photosynthesis requires energy, making it an endothermic reaction. Light, generally sunlight, is the source of this energy. The process converts the sun’s electromagnetic energy into chemical energy, which is then stored in chemical bonds in the plant. Sunlight is the primary source of energy on the surface of Earth.

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Describe briefly the changes from the control values in the MEAN values for volume, specific gravity and NaCl after drinking pur

Yuri [45]

Answer:

As specific gravity is defined as weight per unit volume,so urine is the less dense fluid,so urine will be in hyperosmotic category.

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3 years ago

How many moles are there in 1.20 x 1025 particles of helium?

Anettt [7]

Answer:

You would get 19.969 moles.

Explanation:

You would get 19.969 moles.

3 0

2 years ago

Which object has the greatest velocity? Assume the objects have equal masses.

emmainna [20.7K]

Option c would be the correct answer

5 0

3 years ago

Shown is an infrared image of a star, Beta Pictoris. Why would scientists use infrared light to take this image instead of

makvit [3.9K]

B is the correct answer

3 0

2 years ago

The decomposition of dinitrogen pentoxide, N2O5, to NO2 and O2 is a first-order reaction. At 60°C, the rate constant is 2.8 × 10

Sati [7]

Answer:

a. 113 min

Explanation:

Considering the equilibrium:-

2N₂O₅ ⇔ 4NO₂ + O₂

At t = 0 125 kPa

At t = teq 125 - 2x 4x x

Thus, total pressure = 125 - 2x + 4x + x = 125 - 3x

125 - 3x = 176 kPa

x = 17 kPa

Remaining pressure of N₂O₅ = 125 - 2*17 kPa = 91 kPa

Using integrated rate law for first order kinetics as:

$[A_t]=[A_0]e^{-kt}$

Where,

$[A_t]$ is the concentration at time t

$[A_0]$ is the initial concentration

Given that:

The rate constant, k = $2.8\times 10^{-3}$ min⁻¹

Initial concentration $[A_0]$ = 125 kPa

Final concentration $[A_t]$ = 91 kPa

Time = ?

Applying in the above equation, we get that:-

$91=125e^{-2.8\times 10^{-3}\times t}$

$125e^{-2.8\times \:10^{-3}t}=91$

$-2.8\times \:10^{-3}t=\ln \left(\frac{91}{125}\right)$

$t=113\ min$

3 0

3 years ago