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Aneli [31]
4 years ago
8

What temperature, pressure, and water vapor concentration would you expect to see in the

Chemistry
1 answer:
mojhsa [17]4 years ago
4 0

The expected parameters in Stratopause are; Temperature: -15 degrees Celsius, Pressure: 1 milibar and Water vapor concentration: cannot be determined.

<u>Explanation</u>:

"Stratopause" is the interaction between the ionosphere and the stratosphere. It is 50-55 km high above the earth surface that is why temperature is very less approximately -15 degrees Celsius (5 degrees Fahrenheit). As it is a thin layer separating the stratosphere and ionosphere actual water vapor concentration cannot be determined. The atmospheric pressure is around 1/1000 of the pressure at sea level.

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For the reaction 2H2 + O2 --&gt; 2H2O, how many grams of oxygen are needed to react 3 moles of hydrogen?
mr Goodwill [35]

Answer:

48 grams

Explanation:

The chemical equation for the reaction is the following:

2 H₂ + O₂ → 2 H₂O

That means that 2 moles of H₂ react with 1 mol of O₂ to produce 2 moles of H₂O. We convert the moles of oxygen (O₂) by using the molecular weight (MW) as follows:

MW(O₂) = 16 g/mol x 2 = 32 g/mol

mass of O₂ = 1 mol x 32 g/mol = 32 g

So, we have the following stoichiometric ratio: 32 g O₂/2 moles H₂. We have 3 moles of hydrogen (H₂), so we multiply the moles by the stoichiometric ratio to calculate how many grams are needed:

3 moles H₂ x 32 g O₂/2 moles H₂ = 48 g O₂

<em>Therefore, 48 grams of O₂ are needed to react with 3 moles of H₂.</em>

4 0
3 years ago
What causes a massive star wars a turn into a super red giant
Sloan [31]

Answer:

The core turns its hydrogen to helium and stops nuclear fusion which causes the outer shells of hydrogen to collapse.

Explanation:

This results in higher temperature and pressure which in turn causes the outer shells to expand and cool as a red giant.

7 0
3 years ago
A container is filled with a gas. The container has a wall controlled by a moveable piston. The
ioda

Answer:

The new volume will be 3.67 L.

Explanation:

As the volume increases, the gas particles (atoms or molecules) take longer to reach the walls of the container and therefore collide with them fewer times per unit of time. This means that the pressure will be lower because it represents the frequency of collisions of the gas against the walls. In this way pressure and volume are related, determining Boyle's law which says:

"The volume occupied by a certain gaseous mass at constant temperature is inversely proportional to pressure"

Boyle's law is expressed mathematically as:

P*V=k

Now it is possible to assume that you have a certain volume of gas V1 that is at a pressure P1 at the beginning of the experiment. If you vary the volume of gas to a new value V2, then the pressure will change to P2, and it will be fulfilled:

P1 * V1 = P2 * V2

In this case:

  • P1= 1.85 atm
  • V1= 4.64 L
  • P2= 2.34 atm
  • V2= ?

Replacing:

1.85 atm* 4.64 L= 2.34 atm* V2

Solving:

V2= \frac{1.85 atm* 4.64 L}{2.34 atm}

V2= 3.67 L

<u><em>The new volume will be 3.67 L.</em></u>

6 0
3 years ago
a 20 liter sample of gas is kept under a constant pressure of 100 kpa. the temperature is lowered from 360 k to 90 k. what is th
Setler79 [48]

To solve this we assume that the gas inside the balloon is an ideal gas. Then, we can use the ideal gas equation which is expressed as PV = nRT. At a constant pressure and number of moles of the gas the ratio T/V is equal to some constant. At another set of condition of temperature, the constant is still the same. Calculations are as follows:

T1 / V1 = T2 / V2

V2 = T2 x V1 / T1

V2 =90 x 20 / 360

<span>V2 = 5 L</span>

3 0
4 years ago
HELP ASAP!
maxonik [38]

Answer:

Electromagnetic Radiation

Activity: TV or Radio

Type: Infrared Waves

Description of use:A television (also known as a TV) is a machine with a screen. Televisions receive broadcasting signals and turn them into pictures and sound. The word "television" comes from the words tele (Greek for far away) and vision (sight). ... Computers and mobile devices also can be used for watching television programs.

7 0
3 years ago
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