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viktelen [127]
3 years ago
14

Help me I’ll do anything

Chemistry
2 answers:
seraphim [82]3 years ago
8 0

Answer:

A) something that causes physical pain

hope this helps

Explanation:

KIM [24]3 years ago
3 0

Answer:

its not A B or C soo choose D *This is what i think*

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Mass = 325.2 volume = 62.5 cm what's the density ?
boyakko [2]

Answer:

159571 lb or cubic feet

Explanation:

3 0
3 years ago
Read 2 more answers
When a substance changes from a liquid to a solid, it has reached its _____ point
Gala2k [10]

Answer:

The temperature at which a substance changes from the liq- uid state to the solid state is called the freezing point. The freez- ing point of the liquid state of a substance is the same temperature as the melting point of the solid state. For example, solid water melts at 0°C and liquid water freezes at 0°C.

Explanation:

6 0
3 years ago
The equation for photon energy, E, is E=hc/λ
Leni [432]

Answer:

The wavelength, λ, of a photon that has an energy of E = 3.92×10⁻¹⁹ J is 5.054*10⁻⁷ m

Explanation:

The wavelength is defined for every periodic wave, that is, for the type of wave that repeats itself with exactly the same shape every given interval of time. It is the distance between two points from which the wave repeats.

Radiation is the emission, propagation and transfer of energy in any medium in the form of electromagnetic waves or particles.

The energy carried by electromagnetic radiation travels by waves. This energy is transmitted grouped in small "quanta" of energy called photons. The energy of a photon is measured in Joules (J) and is

E=\frac{h*c}{wavelength}

Being:

  • E=3.92×10⁻¹⁹ J
  • h= 6.626×10⁻³⁴ J⋅s (Planck's constant)
  • c = 2.99×10⁸ m/s (the speed of light)
  • wavelength=?

and replacing:

3.92*10^{-19}J =\frac{6.626*10^{-34}J.s*2.99*10^{8}\frac{m}{s}   }{wavelength}

you get:

wavelength =\frac{6.626*10^{-34}J.s*2.99*10^{8}\frac{m}{s}   }{3.92*10^{-19}J}

wavelength= 5.054*10⁻⁷ m

<u><em>The wavelength, λ, of a photon that has an energy of E = 3.92×10⁻¹⁹ J is 5.054*10⁻⁷ m</em></u>

6 0
3 years ago
Consider the volumes of benzaldehyde and acetone that you used for your scaled-down version of the lab (as described on the Aldo
lutik1710 [3]

Answer:

Aldol condensation is possible only when their is alpha Hydrogen atom is present. It ia present only in the acetophenone and not in benzaldehyde.

Explanation:

3 0
4 years ago
SOMEONE PLS HELP ASAP!!
Oksi-84 [34.3K]

Answer:

Two cinder blocks 6 centimeters apart

Explanation:

im not 100% certain but the 2 cinder blocks are more dense than the other options

sry if its wrong

5 0
3 years ago
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