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Nadya [2.5K]
3 years ago
15

I need help with the question they are asking

Chemistry
1 answer:
Ierofanga [76]3 years ago
5 0

Answer:

i wish i could help but people are around me

Explanation:

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What is the wavelength of light with 2.89 x 10-19 J of energy? (The speed of
Alika [10]

Let's see

\\ \rm\rightarrowtail E=hv

\\ \rm\rightarrowtail E=\dfrac{hc}{\lambda}

  • lambda is wavelength
  • h is Planck constant
  • c is velocity of sound in air
  • E in energy

\\ \rm\rightarrowtail \lambda=\dfrac{hc}{E}

\\ \rm\rightarrowtail \lambda=\dfrac{6.626\times 10^{-34}\times 3\times 10^8}{2.89\times 10^{-19}}

\\ \rm\rightarrowtail \lambda=6.878\times 10^{-7}m

\\ \rm\rightarrowtail \lambda=68.8\mu m

3 0
2 years ago
Yucca moths lay eggs in yucca flowers. When the eggs hatch, the larvae eat yucca seeds. The moths help pollinate the flowers. Wh
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A. Mutualism. This is because both the larvae and the flower are benefited. The larvae is fed, and the flower is pollinated.

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8 0
3 years ago
At standard pressure, the difference between the freezing point and the boiling point of water, in Kelvin degrees, is D. 373 A.
zepelin [54]
Your answer would be A.100 
 
                                       

6 0
3 years ago
Are protons and neutrons electrically charged
blondinia [14]
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7 0
3 years ago
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What is the mass of 2.90 ×1022 molecules of NaOH (Molar mass = 40.0 g/mol)?
ivann1987 [24]
40.0 g ( 1 mole ) --------------- 6.02x10²³ molecules
      ? ? --------------------------- 2.90x10²² molecules

mass = 2.90x10²² * 40.0 /  6.02x10²³

mass = 1.16x10²⁴ / 6.02x10²³

mass = 1.9269 g

hope this helps!

3 0
3 years ago
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