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lana66690 [7]
3 years ago
5

The densities of several gases at the same temperature are listed below. Considering only density, waves should travel fastest i

n which gas? Gas Density helium 0.09 kg/m3 hydrogen 0.2 kg/m3 oxygen 1.4 kg/m3 radon 9.7 kg/m3 helium oxygen radon
Chemistry
2 answers:
Nostrana [21]3 years ago
4 0
With the given options, waves can travel faster in helium as it has the lowest density, which is 0.09 kg/m3.
melomori [17]3 years ago
3 0

The answer is helium 0.09 kg/m³.

The wave will move faster in the gas that is having lowest density.

As comparison to other gases-hydrogen, oxygen and  radon; helium has the lowest density that is 0.09 kg/m³.

So, waves will move fastest in helium gas as it is having lowest density.

So the answer is helium gas that is waves will move fastest in helium gas.

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How many grams of H2SO4 are needed to prepare 500. mL of a .250M solution?
zavuch27 [327]

Answer:

We need 12.26 grams H2SO4

Explanation:

Step 1: Data given

Volume of a H2SO4 solution = 500 mL = 0.500 L

Concentration of the H2SO4 solution = 0.250 M

Molar mass of H2SO4 = 98.08 g/mol

Step 2: Calculate moles H2SO4

Moles H2SO4 = concentration * volume

Moles H2SO4 = 0.250 M * 0.500 L

Moles H2SO4 = 0.125 moles

Step 3: Calculate mass of H2SO4

Mass of H2SO4 = moles * molar mass

Mass of H2SO4 = 0.125 moles * 98.08 g/mol

Mass of H2SO4 = 12.26 grams

We need 12.26 grams H2SO4

7 0
3 years ago
A 4.305-g sample of a nonelectrolyte is dissolved in 105 g of water. the solution freezes at -1.23c. calculate the molar mass of
amid [387]
The answer is 62.00 g/mol. 
Solution: 
Knowing that the freezing point of water is 0°C, temperature change Δt is 
     Δt = 0C - (-1.23°C) = 1.23°C 
Since the van 't Hoff factor i is essentially 1 for non-electrolytes dissolved in water, we calculate for the number of moles x of the compound dissolved from the equation 
     Δt = i Kf m 
     1.23°C = (1) (1.86°C kg mol-1) (x / 0.105 kg) 
     x = 0.069435 mol 
Therefore, the molar mass of the solute is  
     molar mass = 4.305g / 0.069435mol = 62.00 g/mol
6 0
3 years ago
A jet flies over the ocean. A sound wave travels from the jet to the surface of the ocean. Almost none of the energy from the so
lutik1710 [3]
We need to see the diagram
6 0
3 years ago
How is percent by mass and concentration related?
Julli [10]
You can have a solution of hydrogen peroxide that might say 10% that means that 10% per mass of the hydrogen peroxide solution is the hydrogen peroxide the rest is water.

concentration is the amount of mass in the solution eg 5gdm-3

hope that helps
6 0
2 years ago
A substance added in The final stages to remove sulphur from coal is
Deffense [45]

Answer:

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Explanation:

8 0
3 years ago
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