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
Charra [1.4K]
3 years ago
5

A hot-air balloon is filled with air to a volume of at 750. torr and 21°C. The air in the balloon is then heated to 58°C, causin

g the balloon to expand to a volume of . What is the ratio of the number of moles of air in the heated balloon to the original number of moles of air in the balloon? (Hint: Openings in the balloon allow air to flow in and out. Thus the pressure in the balloon is always the same as that of the atmosphere.) Ratio = 1
Chemistry
2 answers:
dimulka [17.4K]3 years ago
3 0

Answer:

The ratio of the number of moles in the heated balloon to the original number of moles is less than 1.

Explanation:

When the air of the hot-air balloon is heated, its density decreases. It means that the molecules inside the balloon (at 58°C) occupy a bigger volume than the same amount of molecules at the beginning of the process (which are at 21°C). Due to the fact that the balloon envelope is flexible but not infinitely,  part of the molecules tha were originally inside the balloon must flow out in order to release some additional space inside the balloon for the remaining molecules. This extra space makes possible a relatively constant difference of densities between the air inside and the air outside, which gives buoyancy to the balloon. And this is why the amount of moles in the balloon is slightly lower after heating than it was originally.

scZoUnD [109]3 years ago
3 0

Answer:

\frac{n_2}{n_1}=0.93

Explanation:

Hello, in this case the the volume at both the first and second states are missing, therefore, one could suppose a typical value around 4000 m³ for the first state and 4200 m³ based on their normal operating conditions. In such a way, by considering the normal gas law given in terms of the change of temperature, moles and volume, assuming constant pressure as said on the statement as follows:

\frac{n_1T_1}{V_1}= \frac{n_2T_2}{V_2}

One solves for the increasing mole ratio as shown below:

\frac{n_2}{n_1}=\frac{T_1V_2}{T_2V_1}=\frac{(294.15K)(4200m^3)}{(331.15K)(4000m^3)}=0.93

Thus, the volume at the second state is less than that of the first state.

Best regards.

You might be interested in
PLZZZZZZZZ HELPPPPPP<br>​
hjlf

Answer:

482

Explanation:

5 0
3 years ago
Read 2 more answers
The nature particle model of matter describe the property of solid, liquid and gas in molecular level. Which of the given statem
dangina [55]

Answer:

B. Particles of matter have spaces between them.

Explanation:

The particle nature model of matter is an model used to explain the properties and nature of matter. The statements of the particle nature model of matter are as follows :

1. Matter is made of small particles of atoms or molecules.

2. The particles of matter have space between them. The spaces between the particles are least in solids as they are closely packed together but are greatest in gases whose particles are far apart from each other.

3. The particles of matter are in constant motion at all times. Solids particles are not free to move due to strong molecular forces between the particles, but are constantly vibrating in their mean positions. Liquid particles free to move due to lesser molecular forces while gas molecules which have negligible intermolecular forces have the greatest ability to move.

4. The particles of matter are attracted to each other by intermolecular forces. These forces are greatest in solids and least in gases.

The correct option is B.

3 0
3 years ago
How does the density of a gas affect the speed of sound
ZanzabumX [31]

Increased density decreases the speed of sound in a medium. While increased density can mean increased rigidity, or stiffness, it is not always the case. Greater density can be due to each molecule or atom having more momentum, and being slower to respond to the vibration of its neighbor.

4 0
3 years ago
The table below shows the height of a ball x seconds after being kicked.
irga5000 [103]

Answer:

-16

81

19

Explanation:

8 0
3 years ago
Read 2 more answers
You have a solution that is 0.02M formate (HCOO-) and 0.03M formic acid (HCOOH), which has a Ka of 1.8x10-4. What is the pH of t
lisov135 [29]

Answer:

3.6

Explanation:

Step 1: Given data

  • Concentration of formic acid: 0.03 M
  • Concentration of formate ion: 0.02 M
  • Acid dissociation constant (Ka): 1.8 × 10⁻⁴

Step 2: Calculate the pH

We have a buffer system formed by a weak acid (HCOOH) and its conjugate base (HCOO⁻). We can calculate the pH using the <em>Henderson-Hasselbach equation</em>.

pH = pKa +log\frac{[base]}{[acid]} = -log 1.8 \times 10^{-4} + log \frac{0.02}{0.03} = 3.6

6 0
3 years ago
Other questions:
  • Describes something that is quantized
    8·1 answer
  • Which of the following do you think use plasma? welding rocket engines computer chips surgery chemical analysis ozone generation
    6·2 answers
  • State the number of electrons that must be lost by atoms of
    6·1 answer
  • How many Mol are in 4.000 grams of MgCl2 ?
    11·1 answer
  • How many acidic H+ ion is given by H3BO3 in aqueous solution?? ...?
    6·1 answer
  • Melamine is used for making
    6·1 answer
  • What is an octet of electrons? Which elements contain an octet of electrons?
    11·2 answers
  • Write the overall balanced equation for the reaction:<br><br> N2O4(g) + CO → NO(g) + CO2(g)+NO2(g)
    10·1 answer
  • Help please
    8·2 answers
  • In what type of climate do trees produce narrower rings?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!