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4 years ago

Once the sun goes down will the air or water cool of faster

Chemistry

2 answers:

pshichka [43]4 years ago

6 0

The air will cool faster

Ann [662]4 years ago

3 0

It will cool faster.

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Balance the following equation. C3H8(g) + O2(g) → CO2(g) + H2O(l)

Arte-miy333 [17]

Explanation:

C3H8+5O2----->3CO2+4H2O

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3 years ago

You can obtain a rough estimate of the size of a molecule with the following simple experiment: Let a droplet of oil spread out

mina [271]

Answer:

The diameter of the oil molecule is $4.4674\times 10^{-8} cm$ .

Explanation:

Mass of the oil drop = $m=9.00\times 10^{-7} kg$

Density of the oil drop = $d=918 kg/m^3$

Volume of the oil drop: v

$d=\frac{m}{v}$

$v=\frac{m}{d}=\frac{9.00\times 10^{-7} kg}{918 kg/m^3}$

Thickness of the oil drop is 1 molecule thick.So, let the thickness of the drop or diameter of the molecule be x.

Radius of the oil drop on the water surface,r = 41.8 cm = 0.418 m

1 cm = 0.01 m

Surface of the sphere is given as: a = $4\pi r^2$

$a=4\times 3.14\times (0.418 m)^2=2.1945 m^2$

Volume of the oil drop = v = Area × thickness

$\frac{9.00\times 10^{-7} kg}{918 kg/m^3}=2.1945 m^2\times x$

$x= 4.4674\times 10^{-10} m= 4.4674\times 10^{-8} cm$

The thickness of the oil drop is $4.4674\times 10^{-8} cm$ and so is the diameter of the molecule.

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3 years ago

What is the electrical charge of a cation? A. zero B. positive C. negative

Ronch [10]

It would be letter "B", positive. Anions are the ones with negative charges.

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4 years ago

What is biodiversity?

aev [14]

I think A but if it’s wrong I’m sorry ❤️

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3 years ago

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What is an orbital shell

Lyrx [107]

orbital shell is the the circular paths around the nucleus of an atom along which the electrons traverse.

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3 years ago