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
Leviafan [203]
3 years ago
11

A balloon contains helium gas expands from 230ml to 860 ml as more helium is added. What was the initial quantity of helium pres

ent if the expanded balloon contains 3.8x10^-4 mol, assuming constant temperature and pressure?
Chemistry
2 answers:
Kisachek [45]3 years ago
6 0

Answer:

n₁ = 1.0× 10⁻⁴ mol

Explanation:

Given data:

Initial volume of balloon = 230 mL

Initial number of moles of He =?

Final number of moles of He = 3.8 × 10⁻⁴ mol

Final volume of balloon = 860 mL

Solution:

The given problem will be solve through Avogadro law,

"Number of moles of gas and volume are directly proportional to each other at constant temperature and constant pressure"

Mathematical relationship:

V₁/n₁ = V₂/n₂

No we will put the values.

230 mL  /n₁   = 860 mL/ 3.8 × 10⁻⁴ mol

n₁ = 230 mL× 3.8 × 10⁻⁴ mol/ 860 mL

n₁ = 874 × 10⁻⁴ mol. mL / 860 mL

n₁ = 1.0× 10⁻⁴ mol

PolarNik [594]3 years ago
3 0

Answer: the answer is n1=n2v1/v2

Explanation:

hope this helped

You might be interested in
A carpet sells for $28.99 a square yard. What is the price of the carpet per square meter?
9966 [12]

It is given that the price of the carpet is $ 28.99 per square yard

Step 1: Convert square yard to square meter

1 square yard = 0.836 square meter

Step 2: Calculate the cost/square meter

Now based on the relation in step (1) we can write

0.836 square meter of carpet costs $ 28.99

Therefore the cost of 1 square meter of the carpet would be

= $ 28.99 * 1 sq meter/0.836 sq meter

= $ 34.68

7 0
3 years ago
Read 2 more answers
The equation shows lead reacting with sulfuric acid to produce lead sulfate and hydrogen gas.
timofeeve [1]
This equation represents a single replacement reaction. Single replacement reactions consist of one element reacting with one compound on the reactant side (left side of the equation) and they form one new element and one new compound on the product side of the equation (right side).
5 0
3 years ago
Read 2 more answers
What was the ball's average speed during the time represented on the graph?
nadya68 [22]

Answer:

Explanation:

<em>0.5 i go to k12 i jus took the test</em>

4 0
2 years ago
Read 2 more answers
What is bias in an experiment?
11111nata11111 [884]
I’m not sure what the answer is but I hope someone can help you
3 0
3 years ago
What must happen for an igneous rock to form
Ksenya-84 [330]

Answer:

Igneous Rocks: form by crystallizing melted material (magma).

Explanation:

They can form either on the surface (extrusive igneous rocks), or deep in the crust (intrusive or plutonic igneous rocks).

4 0
2 years ago
Other questions:
  • Sodium thiosulfate, Na 2S 2O 3, is used as a "fixer" in black and white photography. Identify the reducing agent in the reaction
    7·1 answer
  • A patient needs to be given exactly 1000ml of 15% (w/v) intravenous glucose solution. The stock solution is 35% (w/v). How many
    5·2 answers
  • Lakes, rivers, and streams are created due to what stage of the water cycle?
    8·2 answers
  • What is the difference between parent geometry and actual geometry
    8·1 answer
  • A part of the periodic table is shown below:
    9·2 answers
  • How can water dissovle many substances
    7·2 answers
  • Abcdefghijklmnopqrstuvwxyz
    6·2 answers
  • Differences Between Eating Clean to Prevent a Heart Attack and Keeping Drains Clean to Prevent Clogged Pipes
    8·2 answers
  • Why Fr is the most reactive metal ?​
    13·2 answers
  • Combine gas law: PV/T=k or (P1V1)/T1=(P2T2)/T2
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!