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
Yanka [14]
2 years ago
8

A balloon filled with 1.92 g of helium has a volume of 12.5 L. What is the balloon’s volume after 0.850 g of helium has leaked o

ut through a small hole (assume constant pressure and temperature)?
Chemistry
1 answer:
Marizza181 [45]2 years ago
8 0

The answer is 1.56L. Avogadro's Law states that the volume of a gas is directly proportional to the number of moles (or a number of particles) of gas when the temperature and pressure are held constant.

V∝n

V₁/n₁m= V₂/n₂

V₁ = initial volume of gas  = 12.5 L

V₂ = final volume of gas = ?

n₁ = initial moles of gas  = 0.016 mole

n₂ = final moles of gas  = 0.016-0.007 = 0.002 mole

V₁/n₁m= V₂/n₂

V₂= 1.56L

Avogadro's Law is in evidence whenever you blow up a balloon. The volume of the balloon increases as you add moles of gas to the balloon by blowing it up.

Learn more about Volume here:

brainly.com/question/5018408

#SPJ4

You might be interested in
1.
Blababa [14]
Mtge answer is a malaria
5 0
3 years ago
Read 2 more answers
Which feature of a map shows the relationship between a distance on a map and that distance on Earth? key scale grid system comp
fiasKO [112]

Answer:

Scale is the right answer

Explanation:

The  scale is a sentence that relates distance on the map to distance on Earth

8 0
2 years ago
Read 2 more answers
A student is reading the volume from a standard 50-mL buret identical to what you used in the lab. The bottom of the meniscus is
Nutka1998 [239]

Answer:

20 mL

Explanation:

<em>The student should record 20 mL as the correct volume.</em>

The curved surface of a liquid that is usually observed in a buret is referred to as the meniscus. This meniscus is created as a result of the surface tension of the liquid against the walls of the buret. <u>Hence, in order to avoid errors due to parallax, the bottom of the meniscus should be read and not the top.</u>

Therefore, the correct volume that the student should record is 20 mL.

8 0
3 years ago
How many electrons would be in a calcium cation with a positive 2 charge?
kondor19780726 [428]

Number of electrons in a Ca²⁺ = 18

<h3>Further explanation  </h3>

In an atom there are levels of energy in the shell and sub shell  

This energy level is expressed in the form of electron configurations.  

Writing electron configurations starts from the lowest to the highest sub-shell energy level. There are 4 sub-shells in the shell of an atom, namely s, p, d and f. The maximum number of electrons for each sub shell is  

• s: 2 electrons  

• p: 6 electrons  

• d: 10 electrons and  

• f: 14 electrons  

Charging electrons in the sub shell uses the following sequence:  

<em>1s², 2s², 2p⁶, 3s², 3p⁶, 4s², 3d¹⁰, 4p⁶, 5s², 4d¹⁰, 5p⁶, 6s², etc.  </em>

The element Ca has an atomic number of 20, so the number of electrons and protons (in neutral atoms) is also 20

Electron configuration of Ca : <em>1s², 2s², 2p⁶, 3s², 3p⁶, 4s² ⇒[Ar] 4s²</em>

When Ca releases 2 electrons to gain stability (forming Ca²⁺ cations), the number of electrons becomes:

\tt 20-2 = 18

and the electron configuration (Ca²⁺ ) becomes:

<em>1s², 2s², 2p⁶, 3s², 3p⁶</em>

<em />

6 0
3 years ago
The density of an aqueous solution containing 25.0 percent of ethanol (C2H5OH) by mass is 0.950 g/mL. (a) Calculate the molality
lora16 [44]

Answer:

a. 7.24m

b. 5.15M

c. 53.4mL of the solution would contain this amount of ethanol.

Explanation:

Molality, m, is defined as the moles of solute (ethanol, in this case) per kg of solvent.

Molarity, M, are the moles of solute per kg of solvent

To solve this question we need to find the moles of solute in 100g of solution and the volume using its density as follows:

a. <em>Moles ethanol -Molar mass: 46.07g/mol-:</em>

25g ethanol * (1mol/46.07g) = <em>0.54265 moles ethanol</em>

<em>kg solvent:</em>

100g solution - 25g solute = 75g solvent * (1kg / 1000g) = 0.075kg

<em>Molality:</em>

0.54265 moles ethanol / 0.075kg = 7.24m

b. <em>Liters solution:</em>

100g solution * (1mL / 0.950g) = 105.3mL * (1L / 1000mL) = <em>0.1053L</em>

<em>Molarity:</em>

0.54265 moles ethanol / 0.1053L = 5.15M

c. 0.275 moles ethanol * (1L / 5.15moles Ethanol) = 0.0534L =

53.4mL of the solution would contain this amount of ethanol

6 0
3 years ago
Other questions:
  • An atom had an average atomic mass of about 63.5 amu. What is the chemical symbol for the atom?
    14·1 answer
  • Compare and contrast diffusion and osmosis. Include at least one similarity and one difference between the two processes.
    5·1 answer
  • What is a manipulated variable
    15·1 answer
  • A mineral contains only a metal, M, and sulfur. If analysis indicates that a 44.9 g sample of the mineral contains 2.1 g of M, w
    7·2 answers
  • On a cold winter day, the heat from inside leaks out of the house, primarily
    13·2 answers
  • What is the major role of the nuclear regulatory commission
    10·1 answer
  • HELP ASAP
    7·2 answers
  • The atomic number for iodine? 1/53. 2/10. 3/13. 4/16
    13·1 answer
  • Snow melting is a physical change. True False
    13·2 answers
  • What are the uses of hydrogen? ​
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!