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Ket [755]
3 years ago
9

2H20(l) —> 2H2(g) + O2(g) help me pls

Chemistry
1 answer:
xenn [34]3 years ago
5 0
Unfortunately I don't work with the same units as put forward in this question but the equation I use for this is:

pressure*volume = moles*8.314*temperature

The units required for this equation are:

pressure in pascals

temperature in Kelvin

volume in m³

If you convert the units in the question to the units for this equation, you'll be able to work out the volume of oxygen gas in m³
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Which model of the atom was used as a result of JJ Thomson's cathode ray
mariarad [96]

Answer:

a. Plum pudding model

Explanation:

The plum pudding model of the atom was proposed by J.J. Thomson. It was the model he derived from his experiment on the gas discharge tube.

J.J Thomson was the first person to discover electrons which he called cathode rays because in the discharge tube, they emanate from the cathode.

  • This led him to suggest the plum pudding model of the atom.
  • The model reflects electrons being surrounded by a volume of negative charges.
6 0
3 years ago
This happens in diffusion. Choose the correct answer(s)
svlad2 [7]
The answer is d. particles move from an area of high concentration to low concentration.
8 0
2 years ago
Calculate the entropy change for the reaction: Fe2O3(s) +3C(s) -> 2Fe(s) + 3CO(g)
Gelneren [198K]

Answer:

ΔS = +541.3Jmol⁻¹K⁻¹

Explanation:

Given parameters:

Standard Entropy of Fe₂O₃ = 90Jmol⁻¹K⁻¹

Standard Entropy of C = 5.7Jmol⁻¹K⁻¹

Standard Entropy of Fe = 27.2Jmol⁻¹K⁻¹

Standard Entropy of CO = 198Jmol⁻¹K⁻¹

To find the entropy change of the reaction, we first write a balanced reaction equation:

                              Fe₂O₃ +  3C →  2Fe + 3CO

To calculate the entropy change of the reaction we simply use the equation below:

      ΔS = ∑S_{products} - ∑S_{reactants}

Therefore:

     ΔS = [(2x27.2) + (3x198)] - [(90) + (3x5.7)] = 648.4 - 107.1

                          ΔS = +541.3Jmol⁻¹K⁻¹

5 0
2 years ago
4) What is the order of the energy pyramid.?
bazaltina [42]
Each step of the food chain in the energy pyramid is called a trophic level. Plants or other photosynthetic organisms (autotrophs) are found on the first trophic level, at the bottom of the pyramid. The next level will be the herbivores, and then the carnivores that eat the herbivores.
4 0
2 years ago
Is the density of iron greater then the density of gold
Sonja [21]

Gold is one of the softest metals. So YES

3 0
3 years ago
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