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
SpyIntel [72]
3 years ago
5

It took 4.5 minutes for 1.0 l helium to effuse through a porous barrier. how long will it take for 1.0 l cl2 gas to effuse under

identical conditions?
Chemistry
1 answer:
serious [3.7K]3 years ago
4 0
When The rate of effusion is inversely proportional to the √molar mass of the substance.
and we have R(He) = 1L / 4.5 min so,
R(He)/R(Cl2) = (molar mass of Cl2/ molar mass of He)^0.5
and when we have the molar mass of Cl2 = 70.9  & the molar mass of He = 4
so by substitution:
(1L/4.5 min)/ R(Cl2) = (70.9 / 4)^0.5
(1L/4.5 min) / R(Cl2) = 4.21
∴R(Cl2) = (1L/4.5 min) / 4.21 = 1L/ (4.5*4.21)min = 1 L / 18.945 min
∴Cl2 will take 18.945 min for 1 L to effuse under identical conditions

You might be interested in
Which of the following compounds share electrons? NaCl CO CsF KBr
ArbitrLikvidat [17]
Covalent compounds share with each other, whilst Ionic compounds take from each other. 

Covalent compounds are composed of 2 or more NONMETALS.

So, it would be CO, since the rest of the compounds contain metals in them.
7 0
3 years ago
Which of the following does not affect the electrical resistance of a body?
Nastasia [14]
<span>D. Bodies directly surrounding the body</span>
7 0
3 years ago
Which of these statements describes a physical property of hydrogen? Group of answer choices it is found in acids. it is less de
pochemuha

Answer:

it is less dense than oxygen gas.

Explanation:

Hydrogen is the simplest chemical element that exists. The symbol for the chemical element Hydrogen is "H" and it is a colourless, tasteless, odorless, and highly flammable gas.

Hydrogen is a chemical element found in group (1) of the periodic table and as such it has one (1) electrons in its outermost shell. Therefore, Hydrogen has an atomic number of one (1) and a single valence electrons because it has only one proton and one electron in its nucleus.

In Chemistry, the properties of a chemical element that can be observed and measured without changing its chemical nature is known as a physical property. It includes density, color, freezing point, opacity, smell, melting point, viscosity, etc.

Hence, the statement which describes a physical property of hydrogen is that it is less dense (density) than oxygen gas.

7 0
2 years ago
C) Solar energy is the source of all forms of energy.give reasons​
anastassius [24]

Answer:

All energy is made by the sun because without the sun there would be no humans to produce other energy

8 0
2 years ago
Read 2 more answers
How do scientists use radioactive decay to date fossils and artifacts
liubo4ka [24]

Answer: Absolute dating is used to determine a precise age of a rock or fossil through radiometric dating methods. This uses radioactive minerals that occur in rocks and fossils almost like a geological clock. ... These isotopes break down at a constant rate over time through radioactive decay.

8 0
3 years ago
Other questions:
  • What must methane be combined with to undergo a combustion reaction?
    14·2 answers
  • M → M+ + e- reduction or oxidation?
    6·1 answer
  • How much heat, in joules and in calories, is required to heat a 28.4-g (1-oz) ice cube from −23.0 °C to −1.0 °C?
    12·1 answer
  • The half-life of 3H (H-3) is 12 years. About how long does it take for 127/128 of a sample of that radionuclide to decay? (Hint:
    5·1 answer
  • If a doctor wants to know how fast your heart is beating, what would they do <br>​
    7·1 answer
  • iodid ion is oxidized to hypoiodite ion by permanganate what is the ratio of hydroxide ions to iodide ions in balanced equation
    12·1 answer
  • In a molecule of calcium sulfide, calcium has two valence electron bonds, and a sulfur atom has six valence electrons. How many
    7·1 answer
  • What is the pOH of a solution with an OH- ion concentration of 8.4E-7?
    13·1 answer
  • A high energy state is not ideal for atoms, as a result, they form bonds with other atoms. In doing so, what happens to the ener
    8·1 answer
  • A cheetah has been clocked at 112 km/h over a 100-m distance. What is this speed in m/s?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!