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Gala2k [10]
3 years ago
9

Please help!!

Chemistry
1 answer:
kirill [66]3 years ago
6 0

Im interested in solar energy.

The career area that is interesting is pure research into new science.

How does a scientist use solar energy in pure research to develop new ways in science?

What is pure research?

How can a scientist get solar energy?

What does a scientist do in pure research?

When do scientist know they found a new way?

How can they propose the new way of science?

Interviews

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The characteristic bright–line spectrum of potassium is produced when electrons
OLEGan [10]

Answer: B.

Explanation:

When the electron changes levels, it decreases energy and the atom emits photons. The photon is emitted with the electron moving from a higher energy level to a lower energy level. The energy of the photon is the exact energy that is lost by the electron moving to its lower energy level.

Hope this helps!

8 0
3 years ago
How to find the formula for sodium phosphate?
ludmilkaskok [199]
PO4 anion has a 3- charge.A sodium cation , has a 1+ charge.Now , you have to think how many Na ions you need to fully neutralize the PO4 's 3- charge. Answer 3. That's because a molecule must have a neutral charge (a 0 charge). 3+(-3)=0.So , sodium phosphate has the formula Na3PO4.


6 0
3 years ago
I need help on 5,6,7. I would give you guys a thank you. This is going to be due very soon.
Ira Lisetskai [31]

Answer:

5) Plant; 6) Heat; 7) never heard of chemosynthesis, sorry :(

Explanation:

A plant is the only thing in an ecosystem that uses photosyenthesis. This includes trees, algea, and grass.

80% of energy is lost as heat used in order to keep the animal warm.

I am really sorry I couldn’t help with 7!

3 0
3 years ago
A gas sample occupies 2.1 L at a pressure of 101 kPa.
Verizon [17]

Answer:

D) 0.9 L

Explanation:

At constant temperature,

PV = Constant

so,

P1.V1 = P2. V2

101 × 2.1 = 235 × V2

V2 = 0.9 L

6 0
2 years ago
Read 2 more answers
Which elements are more likely to lose electrons?<br> Ca, Li, F and Ne
Slav-nsk [51]
Ca, they only have two valence electrons, in order to become more stable, they would like to lose all of them
3 0
3 years ago
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