3 years ago

Is the sky a solid,liquid,or gas

1 answer:

5 0

The air in the sky and the clouds are gas, however some things in the sky [such as the sun/moon] are solid.
Hope that helped!

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Daniel observed and compared some stars at night and recorded his observations in a chart.

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Wait there was no conclusion abt star Y but since star Z is closest to ear it is more luminous

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2 years ago

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Methane gas is produced from the reaction of solid carbon and hydrogen gas: C(s)+2H2(g)→CH4(g) . How many liters of hydrogen gas

Stels [109]

Answer:

80 liters

Explanation:

At STP, 1 mole of ideal gas has a volume of 22.4 liters.

Therefore, since liters and moles are directly proportional, we can use stoichiometry directly.

40L CH₄ × (2L H₂ / 1L CH₄) = 80L H₂

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3 years ago

Given example of the model used in science that is larger than the real object and an example of a model that is smaller than th

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The model of the solar system is way smaller than the real object. The model of sub-atomic particles in a atom is way larger than the real object.

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3 years ago

Give the chemical symbol for the element with the ground‑state electron configuration [ Ar ] 4 s 2 3 d 1 . symbol: Determine the

Rus_ich [418]

Answer:

Sc (Scandium) has the given electronic configuration.

Explanation:

The given electronic configuration is [Ar] $4s^{2}3d^{1}$ .

The last electron enters the d-subshell and hence is a d-block element known as Scandium with chemical symbol Sc.

For 4s subshell

n=4,l=0 and m ranges from -l to +l so m=0.

For 3d subshell

n=3,l=2 and m ranges from -l to +l so m can take values -2,-1,0,+1,+2

Note:

l values for subshells:

s : 0

p : 1

d : 2

f : 3 and so on.

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2 years ago

Endothermic or exothermic

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Answer:

endo takes energy in and exo releases it out

Explanation:

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