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
lys-0071 [83]
3 years ago
8

A balloon originally has 0.100 moles of helium and has a volume of 0.500 L. If 0.590 grams of He are added to the balloon, what

will the new volume be, in L? (Assume temperature and pressure do not change.)
Chemistry
1 answer:
stepan [7]3 years ago
7 0

Answer:

1.24 L

Explanation:

Avogadro's Law

\frac{V_{1} }{n_{1} } = \frac{V_{2} }{n_{2} }

Convert 0.590 g of He to moles.

0.590 g x (1 mol/4.00 g) = 0.1475 mol He

Add 0.1475 mol to 0.100 mol since the initial moles (n1) increases by this amount.

0.100 mol + 0.1475 mol = 0.2475 mol He

This will represent the final moles (n2)

The initial volume is given, 0.500 L. Plug in the values.

\frac{0.500 L}{0.100 mol} = \frac{V_{2} }{0.2465 mol}

V_{2} = \frac{(0.500 L)(0.2475 mol)}{(0.100 mol)} \\V_{2} = 1.2375\\V_{2} = 1.24 L

You might be interested in
When people walked on the Moon, they found that they could jump higher than they could back on Earth. Why is this true?
Allushta [10]

Answer: B

Explanation: the moon is smaller and contains less mass, therefore its gravitational pull is less than that of Earth's.

8 0
3 years ago
The decomposition of dinitrogen pentoxide, N2O5, to NO2 and O2 is a first-order reaction. At 60°C, the rate constant is 2.8 × 10
Sati [7]

Answer:

a. 113 min

Explanation:

Considering the equilibrium:-

                   2N₂O₅ ⇔ 4NO₂ + O₂

At t = 0        125 kPa

At t = teq     125 - 2x      4x        x

Thus, total pressure = 125 - 2x + 4x + x = 125 - 3x

125 - 3x = 176 kPa

x = 17 kPa

Remaining pressure of N₂O₅ = 125 - 2*17 kPa = 91 kPa

Using integrated rate law for first order kinetics as:

[A_t]=[A_0]e^{-kt}

Where,  

[A_t] is the concentration at time t

[A_0] is the initial concentration

Given that:

The rate constant, k = 2.8\times 10^{-3} min⁻¹

Initial concentration [A_0] = 125 kPa

Final concentration [A_t] = 91 kPa

Time = ?

Applying in the above equation, we get that:-

91=125e^{-2.8\times 10^{-3}\times t}

125e^{-2.8\times \:10^{-3}t}=91

-2.8\times \:10^{-3}t=\ln \left(\frac{91}{125}\right)

t=113\ min

3 0
3 years ago
Suppose water did not form hydrogen bonds.
Vilka [71]

-70°C

Sink

little

hydrogen bonding

Explanation:

Completing the statements:

Water's boiling point would have been close to -70°C. Ice would sink in water. Water would release little heat to warm land during the winter. Ice is less dense than water because of the hydrogen bonding that forms a hexagonal structure in water.

The unique property of water is as a result of its hydrogen bonding. Water is a polar covalent compound. Like most covalent compound, water would have naturally had a very low boiling point.

The intermolecular forces all hydrogen bonding gives water its unique nature.

Hydrogen bond is formed by an attraction between hydrogen one water water molecule and  more electronegative atom on another molecule usually oxygen, nitrogen and fluorine.

They form very strong intermolecular interaction responsible for the behavior of water.

The higher specific heat capacity of water is due to this bond. It absorbs a lot of heat and does not release them on time. This causes water release heat during winter.

Water has a hexagonal shape or structure linking each molecules.

learn more;

Hydrogen bonding brainly.com/question/10602513

#learnwithBrainly

5 0
3 years ago
Read 2 more answers
2. When a teaspoonful of sugar is added to water in a beaker,
Ket [755]
Sugar + water = 2) a solution
3 0
3 years ago
Read 2 more answers
A 1 mL pipette delivers a measured volume of .98 mL (calculate the percentage error)
Natalija [7]

Answer:

2%

Explanation:

.98 is 98% of one and therefore they are missing 2%

4 0
3 years ago
Read 2 more answers
Other questions:
  • When a radioactive atom emits an alpha particle, the mass number of the radioactive atom
    13·2 answers
  • Is smelting copper is a chemical change or physical change?
    6·1 answer
  • Which of the following is an example of chemical weathering?
    10·2 answers
  • Calculate the number of moles of potassium permanganate (KMnO4) corresponding to 230.8 g of the substance.
    10·1 answer
  • (The roller coaster train slowly moved away from the station and over the top of a tall hill.
    5·1 answer
  • (i need help please ill give brainliest if u get it right)* the questions and everything are in the picture below*
    14·1 answer
  • Which is NOT an example of a pure substance?
    9·1 answer
  • Which of the following is a basic need?<br> car<br> shelter<br> bike<br> computer
    12·2 answers
  • The volume of a sample of gas is 0.5 L and the pressure is 0.98 atm. The volume is increased to 1.0 L. Show the set
    5·1 answer
  • I NEED HELP ASAP!!!!!!!!!!!<br> WITHIN THE HOUR<br> Thanks
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!