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
Yuri [45]
3 years ago
9

A Helium Balloon contains 24.3 moles of Helium Gas. How many grams of Helium is this?

Chemistry
2 answers:
mihalych1998 [28]3 years ago
6 0

Answer:

C) 97.2g

Explanation:

Information given;

- Calculate Number of moles

- Mass of Helium

Before proceeding, it is important to know the relationship between number of moles, mass and molar mass.

Generally 1 mole of a atom weighs as much as its molar mass. Given that the molar mass of Helium is 4.00g/mol.

It means one mole of Helium weighs 4 g.

How grams then do 24.3 moles weigh?

1 mol = 4.00g

24.3 mol = x g

Cross multiplication yields;

x = (24.3 * 4) / 1

x = 97.2 g

Gnesinka [82]3 years ago
4 0
Mass= number of moles multiply Mass of one mole
= 24.3 multiplied by 4
= 96.2
You might be interested in
Addition of 50. J to a 10.0-g sample of a metal will cause the temperature of a metal to rise from 25ºC to 35ºC. The specific he
Snowcat [4.5K]

Answer:

b) C = 0.50 J/(g°C)

Explanation:

  • Q = mCΔT

∴ Q = 50 J

∴ m = 10.0 g

∴ ΔT = 35 - 25 = 10 °C

specific heat (C) :

⇒ C = Q / mΔT

⇒ C = 50 J / (10.0 g)(10 °C)

⇒ C = 0.50 J/(g°C)

7 0
3 years ago
Which Two of the following are pure substances*
Snowcat [4.5K]

Answer:

I think A and B

Explanation:

5 0
3 years ago
Read 2 more answers
Identify each of the following solids as molecular, ionic, or atomic.
Kisachek [45]

Answer :

(A) Br₂ (s) : molecular solids

(B) AgCl (s) : ionic solids

(C) S (s) : atomic solids

(D) CH₄ (s) : molecular solids

Explanation :

Molecular solids : It is defined as the solids in which they are held together by covalent forces, dipole interactions as attractive forces etc.

Ionic solids : It is defined as the solids in which the atoms composed with oppositely charged ions.

Atomic solids : It is defined as the solids in which the molecules are held together by covalent forces and also includes pure substance.

(A) Br₂ (s)

It is molecular solids because they are held together by covalent forces.

(B) AgCl (s)

It is ionic solids because in this atoms composed with oppositely charged ions.

(C) S (s)

It is atomic solids because it is a pure substance.

(D) CH₄ (s)

It is molecular solids because they are held together by covalent forces.

7 0
3 years ago
Why is the air in a jet aircraft flying at high altitudes pressurized? *
saw5 [17]

Answer:

Aircraft cabins are therefore pressurized to maintained a similar pressure as that experienced at sea level to ensure normal breathing of passengers.

Explanation:

-Air becomes increasingly thinner with increasing altitudes.

-As such, oxygen becomes limited at higher altitudes and makes it difficult or almost impossible to breath  a condition called hypoxia.

-Aircraft cabins are therefore pressurized to maintained a similar pressure as that experienced at sea level to ensure normal breathing of passengers.

6 0
3 years ago
Quiz
castortr0y [4]

Answer:

I'm assuming atmospheric pressure, since it says she is measuring pressure exerted my atmospheric gases

7 0
3 years ago
Other questions:
  • What ia 45.76×0.25 please help
    11·2 answers
  • What does the formula for table salt indicate about that compound?
    8·1 answer
  • Write the formulas of the acids which liberated hydrogen gas when reacting with magnesium metal
    8·1 answer
  • What is bromic acid
    12·1 answer
  • You apply the same amount of heat to five grams of water and five grams of aluminum. The temperature of the aluminum increases m
    14·1 answer
  • What is the molarity of a solution prepared by dissolving 10.7 g NaI in 0.250 L?0.0714
    9·2 answers
  • Which of the following compounds would have a low
    15·1 answer
  • Is a cold and b is warm? Please help
    10·1 answer
  • Imagine that you and your friend are at the beach. You have your chairs and umbrella set up in the perfect spot near the water s
    7·1 answer
  • What id the study of living things called
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!