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
Wewaii [24]
3 years ago
6

How many moles of helium gas are contained in a 4.0 L flask at STP

Chemistry
1 answer:
Ratling [72]3 years ago
3 0
First, you convert liters to moles. 
Usually you have to go to grams but this is STP.

Get moles directly by dividing the 4 by STP (22.4)
\frac{4}{22.4} =0.17857142857
About 1.8*10^{-1} or 0.18 moles whichever your teacher prefers

You might be interested in
Tell me whats wrong in this
frozen [14]

Answer:

Gallium is NOT a transition metal.

Explanation:

1. Titanium is a Transition metal However Gallium is NOT. Gallium is a main group metal, It belongs to group 3 - Boron Group.

All the remaining statements are correct.

5 0
3 years ago
5 Fe2+(aq) + MnO4−(aq) + 8 H+(aq) ⟶ 5 Fe3+(aq) + Mn2+(aq) + 4 H2O(l) determine if each of the following statements is True or Fa
aalyn [17]

Explanation:

Fe2+ lose electrons to become Fe 3+ hence oxidized

maO4- is the oxidizing agent

3 0
3 years ago
How many moles of oxygen are needed to react with 100.0 grams of aluminum?
Tasya [4]

Answer:

2

Explanation:

8 0
2 years ago
1. (8pt) Using dimensional analysis convert 600.0 calories into kilojoules
Ivanshal [37]

Answer:

1. 2.510kJ  

2. Q = 1.5 kJ

Explanation:

Hello there!

In this case, according to the given information for this calorimetry problem, we can proceed as follows:

1. Here, we consider the following equivalence statement for converting from calories to joules and from joules to kilojoules:

1cal=4.184J\\\\1kJ=1000J

Then, we perform the conversion as follows:

600.0cal*\frac{4.184J}{1cal}*\frac{1kJ}{1000J}=2.510kJ

2. Here, we use the general heat equation:

Q=mC(T_2-T_1)

And we plug in the given mass, specific heat and initial and final temperature to obtain:

Q=236g*0.24\frac{J}{g\°C} (34.9\°C-8.5\°C)\\\\Q=1495.3J*\frac{1kJ}{1000J} \\\\Q=1.5kJ

Regards!

7 0
2 years ago
Which element has the smallest atomic radius? Fluorine, Iron, Phosphorous, Potassium
Ivahew [28]

Answer:

actually answer should be helium

7 0
3 years ago
Read 2 more answers
Other questions:
  • Many free radicals combine to form molecules that do not contain any unpaired electrons. The driving force for the radical–radic
    10·1 answer
  • If 2a=3b and a=6 then b=
    5·2 answers
  • S Which could occur in a closed system?
    7·1 answer
  • At what temperature is a neon a: <br> 1) Solid <br> 2) Liquid <br> 3) Gas
    5·1 answer
  • Match the following terms to their respective definitions:
    13·1 answer
  • How many grams are in a teragram?<br> 102<br> 10°<br> 10%<br> 10<br> o<br> 10<br> -9<br> 10-12<br> o
    13·1 answer
  • A gas sample is held at constant pressure. The gas occupies 2.97 L of volume when the temperature is 21.6°C. Determine the tempe
    6·1 answer
  • Which of the following best describes the use of a non renewable resource?
    9·1 answer
  • Is John Cena a rabbit?
    7·2 answers
  • What are the two properties of liquid because of which it uses in hydraulic brake<br><br><br>​
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!