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
Korvikt [17]
2 years ago
10

A balloon filled with helium occupies 20.0 l at 1.50 atm and 25.0◦c. How many moles of helium will there be in the balloon at st

p?
Chemistry
1 answer:
satela [25.4K]2 years ago
8 0

Answer:

  • There will be 1.23 moles of helium in the balloon at STP

Explanation:

1) <u>Initial conditions of the helium gas</u>:

  • V = 20.0 liter
  • p = 1.50 atm
  • T = 25.0 °C = 25.0 + 273.15 K = 298.15 K

2) <u>Ideal gas equation</u>:

  • pV = n RT
  • p, V, and T are given above
  • R is the Universal constant = 0.0821 atm-liter / ( K - mol)
  • n is the unknown number of moles

3) <u>Solve for n</u>:

  • n = pV / (RT) =
  • n = 1.50 atm × 20.0 liter / (0.0821 atm-liter /k -mol ×298.15K)
  • n = 1.23 mol

4) <u>At STP:</u>

  • STP stands for standard pressure and temperature.
  • The amount (number of moles) of the gas will not change because the change of pressure and temperature, so the number of moles reamain the same: 1.23 mol.
You might be interested in
The van der waals equation is a modified version of the
vodomira [7]

Answer:

Hullbreine

Explanation:

answer from quiz

6 0
2 years ago
Give the postional isomers of 2 halopropane<br>(CH3)2CH​
s344n2d4d5 [400]

Give the positional isomers of 2 halopropane

(CH3)2CH​

answer:

    is in file download it

6 0
2 years ago
The concentration of reactants and products and the rate of reaction were measured during a chemical reaction. After the first 3
igomit [66]

Answer: B

Explanation:

4 0
2 years ago
A tire at 21°C has a pressure of 0.82 atm. Its temperature decreases to –3.5°C. If there is no volume change in the tire, what i
Shtirlitz [24]

Answer:

a

Explanation:

0.75

5 0
3 years ago
What are empirical observations?
Nady [450]

Answer:

Empirical evidence for a proposition is evidence, i.e. what supports or counters this proposition, that is constituted by or accessible to sense experience or experimental procedure. Empirical evidence is of central importance to the sciences and plays a role in various other fields, like epistemology and law.

Explanation:

thanks me later

8 0
2 years ago
Read 2 more answers
Other questions:
  • 2 nf3 + 225 kj -&gt; n2 + 3f2 is it exothermic or endothermic
    12·1 answer
  • What is the electronegativity difference in the compound aluminum chloride, alcl3?
    6·1 answer
  • The following reaction was performed in a sealed vessel at 760 ∘C : H2(g)+I2(g)⇌2HI(g) Initially, only H2 and I2 were present at
    9·1 answer
  • A student needs to convert a volume of 3 Tbsp (tablespoons) to mL. The student finds out that 1 tablespoon is equivalent to 14.7
    13·1 answer
  • What type of elements are most likely to form more than one type of ion
    7·2 answers
  • An atom represented by X forms a compound with
    8·1 answer
  • Is usually categorized to a specific area in the state known as a soil series
    14·1 answer
  • How do double replacement reactions relate to Combustion reactions
    12·1 answer
  • If 5.55 moles of gas have a volume of 12.2 L, what is the new volume when the moles of
    11·1 answer
  • the ground-state valence-shell configuration of a particular atom is 4d105s25p1. the element to which this atom belongs is a
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!