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3 years ago

Heart, 5 stars, and Brainiest to first right answer!

Chemistry

2 answers:

saul85 [17]3 years ago

8 0

Answer:

Without the hydrosphere, the atmosphere will no longer be able to carry up the evaporated water, as well as pour down the water, leaving the biosphere to rot away. The hydrosphere works with the Biosphere to provide the requirement of water to the organisms needs, as well as the hydrosphere assisting in photosnythesis.

Explanation:

Naddika [18.5K]3 years ago

6 0

Answer:

The hydrosphere refers to the water on the earth crust. If there were no hydrosphere, we would not have lakes, oceans, rivers, or even a hose full of water. There would also be no life. Nothing can live without water, so nothing would have evolved.

Explanation:

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How will you known that you have reached the equivalence point when titrating the NaOH solution with HCl?

Nitella [24]

Answer:

When the solution (with phenolphthalein) changes to colorless

Explanation:

When titrating with HCl is common to add phenolphthalein as an acid-base indicator.

Phenolphthalein is pink or fucsia when added into a basic solution. On the other hand when it is in acid solutions, is colorless.

So, when titrating, the NaOH solution will be initialy pink due to the phenolphthalein and when reaching the equivalence point, that color will fade out into colorless. This is how you know you hace reached the equivalent point.

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3 years ago

How does the feedback mechanism help maintain homeostasis?

ivolga24 [154]

The body tries to regulate it's own temperature. it's like the body has a target point

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3 years ago

What is an example of an initiation phase for an addition

iren [92.7K]

Answer:

H-O* + CH3-CH3 ----> H-O-CH2-CH2*

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3 years ago

Elena makes the table below to determine the number of atoms of each element in the chemical formula 3(NH4)2SO4. A table with 3

Bumek [7]

Answer:

✌3 I think - She should not have multiplied the hydrogen atoms by the coefficient. sorry im not sure but I tried tell, tell me if im wrong Plz!✌

Explanation:

❤So sorry if it's wrong. ❤

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3 years ago

Read 2 more answers

The lines on Absorption Atomic Spectra correspond to energies needed for electrons to be excited from a lower energy level to a

Nadya [2.5K]

Answer:

553 nm

Explanation:

When an electron from O absorbs radiation with an energy (E) of 3.6 × 10⁻¹⁹ J, it is excited from orbital 2p to orbital 3s. The wavelength (λ) associated with that radiation can be calculated using the Planck-Einstein equation.

E = h. ν = h . c . λ⁻¹

where,

h is the Planck's constant

c is the speed of light

ν is the frequency

$\lambda = \frac{h.c}{E} =\frac{6.63 \times 10^{-34}J.s \times 3.00 \times 10^{8} m/s}{3.6 \times 10^{-19}J } .\frac{10^{9}nm }{1m} =553nm$

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4 years ago