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inna [77]
2 years ago
10

The combination of gases that surrounds and protects the earth is known as

Chemistry
2 answers:
MissTica2 years ago
8 0

Answer : Atmosphere.

Explanation : The combination of gases that surrounds and protects the earth is known as Atmosphere.

An atmosphere is defined as a layer or a set of multiple layers of gases surrounding a planet or other material body, which is held in place by the gravity of that body.

It acts as an envelope of air around the earth and protects the earth from the harmful ultraviolet rays coming from the sun. Air in the atmosphere contains high amount of nitrogen which is 78.09 percent, oxygen is 20.95 percent, argon is 0.9 percent argon, carbon dioxide is 0.04 percent there is also small amounts of other gases.

Lunna [17]2 years ago
5 0
The combination of gases that surround and protect the Earth is the ATmosphere
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Witch object has most potential energy.
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Answer:

D, if the cliff is higher than the refrigerator

Explanation:

3 0
3 years ago
The molar mass of an unknown gas was measured by an effusion experiment. It was found that it took 60 s for the gas to effuse, w
Marizza181 [45]

Answer:

The molar mass of the gas is 44 g/mol

Explanation:

It is possible to solve this problem using Graham's law that says: Rates of effusion are inversely dependent on the square of the mass of each gas. That is:

\frac{r_1}{r_2} =\frac{\sqrt{M_2} }{\sqrt{M_1} }

If rate of effusion of nitrogen is Xdistance / 48s and for the unknown gas is X distance / 60s and mass of nitrogen gas is 28g/mol (N₂):

\frac{X/48s}{X/60s} =\frac{\sqrt{M_2} }{\sqrt{28g/mol} }

6,61 = √M₂

44g/mol = M₂

<em>The molar mass of the gas is 44 g/mol</em>

<em></em>

I hope it helps!

4 0
3 years ago
what can we tell about an unknown substance based on its properties. Its science btw, i couldnt find the science subject
dsp73

Answer:

Measuring its density and comparing your result to a list of known densities, or other properties that give you useful info

Explanation:

You can use observations about substances to form a hypothesis about the substance by comparing it to others. Ex: if something is magnetic it must be made of one or more of the elements iron, cobalt, or nickel.

6 0
2 years ago
Many computer chips are manufactured from silicon, which occurs in nature as SiO2. When SiO2 is heated to melting, it reacts wit
riadik2000 [5.3K]

Answer:

A) SiO2 is the limiting reactant

B) Theoretical yield= 72333.3g

C) % yield =91.5%

Explanation:

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n(SiO2)= 155000/60 = 2583.33 mols

n(C)= 79000/12= 3291.66 mols

a)SiO2 is the limiting reactant

According to the balanced reaction equation,

60g of SiO2 produced 28g of SiO2

155000g of SiO2 will produce 155000×28/60= 72333.3g

Therefore theoretical yield of Si= 72333.3g

% yield= 66200/72333.3×100/1 =91.5%

5 0
3 years ago
A white crystalline salt conducts electricity when it is melted and when it is dissolved in water. which type of bond does this
Sergio039 [100]
The salt contains ionic bond so that it dissociate ultimately by the movement of ion electricity is conducted
6 0
3 years ago
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