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
Think about how particles are arranged inside atoms. Please name and describe those three particles, and describe how the partic
vekshin1
Protons : positive charge , about same mass as neutrons , in the nucleus

neutrons : no charge , about the same mass as a proton , in the nucleus

electrons : negative charge , less mass than protons and neutrons , in orbitals outside of the nucleus
8 0
2 years ago
in an experiment 3.5g of element A reacted with 4.0g of element G to form a compound Calculate the empirical formula for this co
kolezko [41]

Additional information

Relative atomic mass(Ar) : A=7, G=16

The empirical formula : A₂G

<h3>Further explanation</h3>

Given

3.5g of element A

4.0g of element G

Required

the empirical formula for this compound

Solution

The empirical formula is the smallest comparison of atoms of compound forming elements.

The empirical formula also shows the simplest mole ratio of the constituent elements of the compound

mol of element A :

\tt mol=\dfrac{mass}{Ar}\\\\mol=\dfrac{3.5}{7}=0.5

mol of element G :

\tt mol=\dfrac{4}{16}=0.25

mol ratio A : G = 0.5 : 0.25 = 2 : 1

4 0
2 years ago
Why pure hydrogen is not used in ballons ?​
wariber [46]

Answer:  Hydrogen that is not used in balloons because hydrogen burns very easily.

pls mark brainliest

8 0
2 years ago
What are crayons made of?
Mashutka [201]
They are made of different color of waxes

7 0
3 years ago
Read 2 more answers
How many moles of CaCl₂ are required to produce 45.97 grams of NaCl?
marin [14]
Answer is 0.7866187543

6 0
2 years ago
Other questions:
  • Please help me with this
    10·2 answers
  • A material that is dissolved in another material
    6·1 answer
  • Rewrite each percent as a fraction and decimal 56%
    12·1 answer
  • An atomic radius is about 1.00*10^2 pm. Convert the radius to inches. (1 pm=10^-12m)
    12·1 answer
  • Which of the following chemical bonds have the lowest potential energy?
    11·1 answer
  • a student is studying the ways different elements are similar to one another diagrams of atoms from four different elements are
    7·1 answer
  • Which option should a person avoid doing in order to better protect the quality of watersheds?
    15·1 answer
  • Which of these are examples of polygenic traits? blood type in humans and birth weight in calves birth weight in calves and eye
    5·2 answers
  • What is set in mathematics​
    13·2 answers
  • Which statement is correct about charges?
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!