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dlinn [17]
4 years ago
15

What is cold source of light

Chemistry
2 answers:
Anettt [7]4 years ago
6 0
Fireflies. LED, fluorescent light
jekas [21]4 years ago
4 0

Answer:

LEDs (they can heat up, but they do not require heat to emit light, usually heat is an unwanted effect)

Light-emitting field-effect transistors (same consideration as for LEDs)

Fluorescent lighting and generally cold plasmas that can emit light.

Old TV and PC monitors (ie cathode ray tube screen - although the light emission itself does not require heat, the cathode itself that shoots the electrons does)

Chemo-luminescence (like fluorescent sticks)

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Atoms are the smallest unit of an element that holds the physical identity of that element T or F
Amanda [17]

Answer:

I think it might the answer might be true, im sure you can find this in online tho

8 0
3 years ago
What is the electron dot structure for beryllium and oxygen when they combine into a compound
Shtirlitz [24]

Answer:

The formula unit for beryllium oxide is BeO

Explanation:Mark me as brainliest

5 0
3 years ago
Using the balanced equation for the next few questions: 4 Fe(s) + 30 (9) - 2Fe2O3(s)
stira [4]

Answer:

0.075 moles of iron oxide would be produced by complete reaction of 0.15  moles of iron.

Explanation:

The balanced reaction is:

4 Fe + 3 O₂ → 2 Fe₂O₃

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:

  • Fe: 4 moles
  • O₂: 3 moles
  • Fe₂O₃: 2 moles

You can apply the following rule of three: if by stoichiometry 4 moles of Fe produce 2 moles of Fe₂O₃, 0.15 moles of Fe produce how many moles of Fe₂O₃?

moles of Fe_{2} O_{3} =\frac{0.15 moles of Fe*2 moles of Fe_{2} O_{3}  }{4 moles of Fe}

moles of Fe₂O₃= 0.075

<u><em>0.075 moles of iron oxide would be produced by complete reaction of 0.15  moles of iron.</em></u>

5 0
3 years ago
In this model of a molecule of ammonia, NH3, how many covalent bonds are represented?
Verdich [7]
I think the answer is three but i can't be sure.
4 0
3 years ago
Why doesn't water light on fire? It has all the ingredients except heat! Hydrogen for the flammability factor, oxygen so it can
Fiesta28 [93]

Hydrogen- and Oxygen Atoms combine to form a whole net molecule called H20 (Water), which has completely different properties and pure water can't ignite

6 0
3 years ago
Read 2 more answers
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