1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
noname [10]
4 years ago
15

4. Air is made up of gas particles. These particles exert pressure on every object they collide against. This pressure is known

as air pressure. Which of the following statements about air pressure is true?
Air pressure decreases as altitude increases


The atmosphere's air pressure does not vary


WArm air tends to have a higher air pressure than cold air


Air pressure increases as altitude increases
Chemistry
2 answers:
butalik [34]4 years ago
7 0

Answer: Air Pressure decreases as altitude increases.

Explanation: The pressure in the atmosphere at any level can be termed as the total weight of the air at level.

The pressure at lower levels is higher than the pressure at elevated distances because the air molecules are stick to the surface of the earth due to the gravitational pull.

Thus at higher altitudes, due to decrease of the atmospheric air, pressure also decreases.

Pavlova-9 [17]4 years ago
6 0
Air pressure increases as altitude decreases.
You might be interested in
Joel has noticed that his engine is not compressing properly during the compression and ignition step. What problem will this po
denis-greek [22]

The answer is: The engine will run inefficiently APEX....

7 0
3 years ago
Convert 25 gigaseconds into centiseconds​
dangina [55]

25 gigaseconds is equal to 2,500,000,000,000 centiseconds

6 0
3 years ago
An ideal gas in a cylindrical container of radius r and height h is kept at constant pressure p. The bottom of the container is
Juli2301 [7.4K]

Answer:

m =\frac{p*(pi)*r^{2}*h*mw}{R*\frac{T_{1} + T_{O}}{2}}  

Explanation:

The gas ideal law is  

PV= nRT (equation 1)

Where:

P = pressure  

R = gas constant  

T = temperature  

n= moles of substance  

V = volume  

Working with equation 1 we can get  

n =\frac{PV}{RT}

The number of moles is mass (m) / molecular weight (mw). Replacing this value in the equation we get.

\frac{m}{mw} =\frac{PV}{RT}  or  

m =\frac{P*V*mw}{R*T}   (equation 2)

The cylindrical container has a constant pressure p  

The volume is the volume of a cylinder this is

V =(pi)*r^{2}*h

Where:

r = radius  

h = height  

(pi) = number pi (3.1415)

This cylinder has a radius, r and height, h so the volume is  V =(pi)*r^{2}*h

Since the temperatures has linear distribution, we can say that the temperature in the cylinder is the average between the temperature in the top and in the bottom of the cylinder. This is:  

T =\frac{T_{1} + T_{O}}{2}  

Replacing these values in the equation 2 we get:

m =\frac{P*V*mw}{R*T}   (equation 2)

m =\frac{p*(pi)*r^{2}*h*mw}{R*\frac{T_{1} + T_{O}}{2}}    

8 0
3 years ago
Hey hiihhbdndkdkdjdjddjdj
grigory [225]

Answer:

4 cups are about 0.25 gallons

Explanation:

To convert a cup measurement to a gallon measurement, divide the volume by the conversion ratio. The volume in gallons is equal to the cups divided by 16.

7 0
3 years ago
Read 2 more answers
The overall cell reaction occurring in an alkaline battery isZn(s) + MnO₂(s) + H₂O(l) → ZnO(s) + Mn(OH)₂(s) (e) In practice, vol
zubka84 [21]

b) Mass of MnO₂ = 5.981 g

    Mass of H₂O = 1.2384 g

c) Total Mass of Reactant consumed = 11.708 g

b) Given Reaction

            Zn(s) + MnO₂(s) + H₂O(l) → ZnO(s) + Mn(OH)₂(s)

  Mass of Zn = 4.50 g

  Moles of Zn = 0.0688 moles

   Now,

    Moles of Zn = moles of MnO₂ = moles of H₂O = moles of ZnO = moles of                   Mn(OH)₂

Hence ,

Moles of MnO₂ = 0.0688 moles

Mass of MnO₂ = 0.0688 × 86.9368 g

                        = 5.981 g

Similarly,

    Moles of H₂O = 0.0688 moles

     Mass of H₂O = 0.0688 × 18 g

                           = 1.2384 g

c) now ,

    Moles of  ZnO = 0.0688 moles

     Mass of  ZnO  = 0.06880× 81.3794 g

                              = 5.598 g

 Moles of  Mn(OH)₂ = 0.0688 moles

  Mass of  Mn(OH)₂ =0.0688 × 88.952 g

                                  = 6.11 g

Total mass of Product = 11.708 g

Total Mass of Reactant = 11.715 g

Hence,

    Total mass of reactant consumed = 11.708 g

c)  As total mass of reactant is more than that of mass of reactant consumed , Hence G is more than that of mass of reactant consumed .

G = - nFEcell

 

and no. of moles of reactant  is greater than that of number of moles of reactant consumed .

       Hence voltaic cell of given Capacity are heavier than that of mass of reactant consumed .

 Thus from above conclusion we can say that , Mass of the reactant consumed is 11.708 g.

Learn more about Galvanic Cell here : brainly.com/question/19340007

#SPJ4

3 0
2 years ago
Other questions:
  • What's a member of the boron family and the most abundant metal in the earths crust
    11·1 answer
  • Special substances in cells that absorb or release hydrogen ions to keep the ph value constant are called
    8·1 answer
  • An
    12·1 answer
  • A solution of phosphoric acid was made by dissolving 10.0 g of H3PO4 in 100.0 mL of water. The resulting volume was 113 mL. Calc
    6·1 answer
  • A photon with a wavelength of less than 50.4 nm can ionize a helium atom.
    13·1 answer
  • Which of the following would have the highest average kinetic energy?
    6·1 answer
  • Air has a mass of 1.2g and a volume of 4,555ml. What is the density
    5·1 answer
  • Calculate the volume of 2.408x1024 molecules of water vapor at STP.
    8·1 answer
  • Which of these best describes the relationship between the inner core, outer core, mantle, crust, asthenosphere, and lithosphere
    10·1 answer
  • Does seeing a gas produced always mean a chemical reaction is occurring? Explain.
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!