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3 years ago

What energy is involved when wood burns in a campfire? Check all that apply.

2 answers:

3 0

The wood is not falling, so it can’t be gravitational potential energy. There’s nothing to do with electricity, so it’s not electromagnetic energy. When’s log is being burned, it goes through combustion, which is a chemical reaction. The wood burning generates electricity from heat, which is thermal energy. The answers are chemical energy and thermal energy.

Gala2k [10]3 years ago

3 0

Chemical energy, thermal energy, electromagnetic energy

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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

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

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

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

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

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2 years ago

How are amounts of hydrogen and oxygen gas made from the electrolytic decomposition of water related to the chemical formula of

Len [333]

Very simply, you get twice as much Hydrogen as Oxygen, because the chemical formula is H2O, meaning two hydrogen atoms bonded to one oxygen atom.

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4 years ago

Explain the connection between periods and energy levels.

Rainbow [258]

Answer:

The atoms in the first period have electrons in 1 energy level. The atoms in the second period have electrons in 2 energy levels. The atoms in the third period have electrons in 3 energy levels. The atoms in the fourth period have electrons in 4 energy levels.

7 0

3 years ago

what happen when carbon dioxide is passed through water for short time and for long time?explain with chemical reaction.

Delicious77 [7]

Answer:

Expert Verified

Explanation:

For short duration: ... When excess of carbon dioxide gas is passed through lime water then the white precipitate calcium carbonate formed first dissolves due to the formation of a soluble salt calcium hydrogen carbonate (Ca(HCO3)2, and the Solution becomes clear again

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3 years ago

Calculate the volume of 2.65 moles of N2O gas at STP.

Reptile [31]

Answer:

63.6 dm³

Explanation:

Volume of gas= no. of moles ×24dm³

Thus, volume of N₂O

= 2.65 × 24

= 63.6 dm³

3 0

4 years ago