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Nina [5.8K]
3 years ago
6

Question 2 (Multiple Choice Worth 2 points)

Chemistry
1 answer:
faust18 [17]3 years ago
6 0

Answer:

\pi r²  x h

Explanation:

A can is cylindrical in nature. Using the formula of the volume of the can, we can find this unknown volume.

The volume of cylinder is given as:

   Volume of a cylinder  = Area x height

  Volume of  a cylinder = \pi r²  x h

Therefore density of the can;

      Density  = \frac{mass}{volume}

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what are some negative impacts on the environment and society when the water cycle is disrupted and drought occurs ?
Alborosie

Some of the negative impact of disruption in water cycle are adverse environment, with affected farming, hydroelectricity, and deforestation.

The water cycle has been operated in the environment for the conversion of water in the different states. The water cycle has been operated with the conversion of water from the water body to the clouds by evaporation.

The evaporated water has resulted in clouds, that have been condensed and precipitated in the form of rain. The water cycle helps in maintaining the water balance in the ecosystem. It made the water available for use as well.

The drought has been the condition of the scarcity of water. In this condition, there has been a disruption of the water cycle. Some of the negative impacts resulting from the disruption of the water cycle are:

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For more information about water cycle, refer to the link:

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5 0
3 years ago
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S8 + 12 O2 —> 8 SO3 what volume of oxygen would be required to completely react with 45.7g of S8
ahrayia [7]

Answer:

47.9L of oxygen would be required

Explanation:

<em>Assuming oxygen gas is at STP</em>

Based on the reaction:

S₈ + 12 O₂ → 8SO₃

1 mole of S₈ (Molar mass: 256.52g/mol) reacts with 12 moles of oxygen.

To solve this question we must find the moles of S₈ added. With the reaction we can find the moles of O₂ and using PV = nRT we can find the volume of oxygen required:

<em>Moles S₈:</em>

45.7g * (1mol / 256.52g) = 0.178 moles S₈

<em>Moles O₂:</em>

0.178 moles S₈ * (12 moles O₂ / 1mol S₈) = 2.138 moles O₂

<em>Volume O₂:</em>

PV = nRT

V = nRT / P

<em>Where V is volume</em>

<em>n are moles = 2.138 moles</em>

<em>R is gas constant 0.082atmL/molK</em>

<em>T is absolute temperature = 273.15K at sTP</em>

<em>P is pressure = 1 atm at STP</em>

<em />

V = 2.138mol*0.082atmL/molK*273.15K / 1atm

V = 47.9L of oxygen would be required

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3 years ago
PROJECT: THE SCIENTIFIC METHOD
aleksley [76]

Answer:

how many it is you should give only one question

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Combustion reactions are characterized by the reaction of a substance with
pashok25 [27]

Answer: Combustion reactions are characterized by the reaction of a substance with O2 to form one or more oxygen, often water. Combustion reactions emit heat, and they are important because most of society's energy is derived from them. Ex.: CH4 (g) + 2O2 (g) -- CO2 (g) + 2H2O (g)

Explanation: I hope thus helps UwU

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