Answer:
2 moles
Explanation:
Given data:
Moles of water produced =?
Moles of propane = 0.5 mol
Solution:
Chemical equation:
C₃H₈ + 5O₂ → 3CO₂ + 4H₂O
Now we will compare the moles of propane and C₃H₈.
C₃H₈ : H₂O
1 : 4
0.5 : 4/1×0.5 = 2 mol
Thus 2 mole of water are produced from 0.5 moles of propane.
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Lithosphere
The lithosphere is the rocky outer part of the Earth. It is made up of the brittle crust and the top part of the upper mantle. The lithosphere is the coolest and most rigid part of the Earth.
Explanation:
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Answer:
Q = 768.47 J
Explanation:
Given that,
Mass of the metal, m = 25 g
Initial temperature, T₁ = 21.0 ºC
Final temperature, T₂ = 80.0 ºC
The specific heat of the metal is 0.521 J/gºC.
We know that the heat released due to the change in temperature is given by :
Hence, 768.47 J of heat energy will be needed.
Answer:
C. 6 E23 atoms Cl2
Explanation:
S.T.P:
∴ T = 25°C ≅ 298 K
∴ P = 1 atm
ideal gas:
∴ R = 0.082 atm.L/K.mol
∴ V = 22.4 dm³ = 22.4 L
⇒ mol (n) = PV/RT
⇒ n Cl2(g) = ((1 atm)(22.4 L)/(0.082 atm.L/K.mol)(298 K))
⇒ n Cl2(g) = 0.9166 mol
⇒ atoms Cl2(g) = (0.9166 mol)*(6.022 E23 atoms/mol)
⇒ atoms Cl2(g) = 5.52 E23 atoms ≅ 6 E23 atoms
It had electrons mixed around in a sea of positive charge