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
Ugo [173]
3 years ago
8

A balloon is filled with 3.8 l of helium gas at stp. approximately how many moles of helium are contained in the balloon?

Chemistry
2 answers:
love history [14]3 years ago
7 0
Hope this helps you.

Lelechka [254]3 years ago
3 0

Answer:

0.16964 moles ≈ 0.17 moles

Explanation:

At STP, one mole of a gas has a volume of 22.4 L.

1 mole = 22.4L

x mole = 3.8L

x =  ( 3.8 * 1 ) / 22.4

x = 3.8 / 22.4

x = 0.16964 moles ≈ 0.17 moles

You might be interested in
You are provided with a compound fertilizer, 40-15-10.Calculate the quantity of fertilizer to add to a one hectare field supply
victus00 [196]

Answer:

a. 300 kg of Fertilizer

b. 225 kg of fertilizer

c.400 Kg of fertilizer

d.600 Kg of fertilizer

Explanation:

The percentage composition ratio of Nitrogen, Phosphorus and Potassium bag of the given fertilizer is 40:15:10.

The percentages can be expressed as fractions as follows:

For nitrogen; 40/100 = 0.4

For phosphorus; 15/100 = 0.15

For potassium; 10/100 = 0.1

To find the quantity of fertilizer required to add to a hectare to supply the given amount of nutrients, the amount to be provided is divided by the percentage or fractional compostion of each nutrient.

Quantity of fertilizer required to add to a hectare to supply;

a. Nitrogen at 120 kg/ha = 120/0.4 = 300 Kg of fertilizer

b.. Nitrogen at 90 Kg/ha = 90/0.4 = 225 Kg of fertilizer

c. Phosphorus at  60 kg/ha = 60/0.15 = 400 Kg of fertilizer

d. Potassium at 60 kg/ha = 60/0.1 = 600 Kg of fertilizer

5 0
2 years ago
When you place a glass over a candle and the flame goes out, the limiting reactant is, oxygen wax energy water ​
jeka57 [31]

Answer: oxygen

Explanation:

4 0
3 years ago
Chemitey half equations
shepuryov [24]
Isn't it a because in b at the start of the equation the E in Fe just disappeared
8 0
3 years ago
Genes are located in which part of a cell?
ddd [48]

Answer:A

Explanation:

7 0
3 years ago
A gas with a volume of 250 mL at a temperature of 293K is heated to 324K. What is the new volume of the gas?
ANEK [815]

Answer:

The new volume of the gas is 276.45 mL.

Explanation:

8 0
3 years ago
Other questions:
  • A solution containing less than the equilibrium amount is called ________. a solution containing less than the equilibrium amoun
    11·2 answers
  • On July 8th, I will be 8.51472x108 seconds old. How old will I be in years? (Assume 365 days in a year.)
    15·1 answer
  • What are the coefficients?
    11·1 answer
  • Trichloroethylene, a widely used degreasing solvent for machine parts, is produced in a two-step reaction sequence. Ethylene is
    15·2 answers
  • Carbon burns in the presence of oxygen to give carbon dioxide. Which chemical equation describes this reaction?
    14·1 answer
  • With the given chemical compounds, what is the balanced chemical equation when lit with fire?
    12·1 answer
  • Ahhh helpppp:))))))))))
    11·2 answers
  • The mass of a jar of sugar is 11. 9 kg. What is the total mass of 13 jars of sugar?.
    15·1 answer
  • How much did Britain’s royal society of chemistry estimate that it would cost to make Benedict cumberpatch
    6·1 answer
  • How many molecules of N2O gas are in 250 L at STP?
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!