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3 years ago

Is a small whole number that appears in front of a formula in a chemical equation?

Chemistry

1 answer:

Bezzdna [24]3 years ago

4 0

No. It appears behind the equation

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In a mixture of 3 gases what is the total pressure of the gases if Gas A exerts a pressure

kirill [66]

Answer:

760 mm of Hg

Explanation:

If the gases A , B and C are non reacting , then according to Dalton's Law of Partial Pressure the total pressure exerted is equal to sum of individual partial pressure of the gases .

If there are n , number of gases then ,

$P_{total}= P_1+P_2+P_3+\dots +P_n$

Here ,

Partial pressure of Gas A = 400mm of Hg
Partial pressure of Gas B = 220 mm of Hg
Partial pressure of Gas C = 140mm of Hg

Hence the total pressure exerted is ,

$P_{total}= P_{Gas\ A }+P_{Gas\ B }+P_{Gas\ C }$

Substitute ,

$P_{total}=( 400 + 220 + 140 )mm\ of \ Hg$

Add ,

$P_{total}= 760\ mm\ of \ Hg$

Hence the total pressure exerted by the gases is 760 mm of Hg.

I hope this helps.

4 0

2 years ago

5. What must happen for a seed to emerge from the soil as a seedling?

jeka94

Answer:

It must have sunlight and water and neutrants and be fertilized

Explanation:

6 0

3 years ago

Cesium-137 is part of the nuclear waste produced by uranium-235 fission. The half-life of cesium-137 is 30.2 years. How much tim

Aleonysh [2.5K]

Answer:

la primera va con la última

5 0

3 years ago

Which best describes thermal energy? It is the difference between internal energies of two or more substances. It is the sum of

Klio2033 [76]

Answer:

It is the portion of internal energy that can be transferred from one substance to another.

Explanation:

Thermal energy is the energy obtained by an object due to the motion of its particles.

It is also known as internal energy as it is the energy within the particles due to their motion.

Therefore, we can conclude that it is the portion of internal energy that can be transferred from one substance to another.

Hope this helps!

3 0

3 years ago

Give one example of an element and one compound. Can someone help me with this pls

Mrac [35]

Element: Helium, Oxygen

Compound: H2O, CO2

3 0

3 years ago