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
Andrew [12]
3 years ago
11

What is the number of moles in 40.0 L of He gas at STP?

Chemistry
1 answer:
Alla [95]3 years ago
8 0

Answer: There are 1.78 moles in 40.0 L of He gas at STP

Explanation:

According to ideal gas equation:

PV=nRT

P = pressure of gas = 1 atm (STP)

V = Volume of gas = 40.0  L

n = number of moles = ?

R = gas constant =0.0821Latm/Kmol

T =temperature =273K   (STP)

n=\frac{PV}{RT}

n=\frac{1atm\times 40.0L}{0.0821Latm/K mol\times 273K}=1.78moles

Thus there are 1.78 moles in 40.0 L of He gas at STP

You might be interested in
Give me a summary on the big bang theory -Science
Elza [17]
The Big Bang is a scientific theory about how the universe started, and then made the stars and galaxies we see today. ... Then about 13.8 billion years ago, space expanded very quickly (thus the name "Big Bang"). This started the formation of atoms, which eventually led to the formation of stars and galaxies.
8 0
2 years ago
Fill in the chart to identify three parts of Dalton's model of the atom.
mamaluj [8]

The first part of Dalton's model is that all matter is made of atoms, and these atoms are indivisible.

The second part of this model is that atoms of an element have identical masses and identical propertes.

At last, the third part of Dalton's model is that all compounds are formed by two or more different type of atoms combined.

6 0
1 year ago
Which description gives the steps for creating hydroelectric power
Inessa05 [86]

Answer:

The answer to your problem is

B) river water stored in a reservoir flows down a channel in a dam, turning a turbine as it passes. the turbine is connected to a generator that produces electricity, and then the water continues downstream

plz can i get brainliest

Explanation:

3 0
3 years ago
Read 2 more answers
CH4-&gt;C2H6-&gt;C2H5Cl-&gt;C4H10-&gt;C4H9Br-&gt;C4H8<br> Help me please solve this
Nookie1986 [14]
What are you solving for?
C
H
I
R

7 0
3 years ago
20 POINTS + BRAINLIEST, HELP
lakkis [162]
It’s 2.0 molecules.

Explanation:

It’s kind of obvious, haha.
6 0
3 years ago
Read 2 more answers
Other questions:
  • To understand the relation between the strength of an acid or a base and its pKa and pKb values. The degree to which a weak acid
    11·1 answer
  • Fill In The Blanks:
    5·1 answer
  • Macy always thought there were only a few hair colors:blond,brown,and black. However,when she actually began looking around, she
    12·2 answers
  • Tissues are made up of two or more different types of organs
    9·1 answer
  • Which of the following is NOT true?
    7·2 answers
  • ⚠️SOMEONE PLEASE HELP⚠️
    9·2 answers
  • HELP ME ASAP PLEASEEEE
    11·1 answer
  • You and your science group have been handed five mineral samples to identify. First, you sort the minerals by color. One has man
    5·1 answer
  • What is the hypothetical van't Hoff factor of magnesium nitrate, Mg(NO3)2?
    6·1 answer
  • What is the concentration of each type of monosaccharide in lactose
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!