3 Ethene burns in an excess of oxygen to form carbon dioxide and water.
The equation for the reaction is
C₂H4 & 30₂
2002 + 2H2O.
The relative molecular mass of ethene is 28 and the relative molecular mass of water is 18.
(A: 0, 16; C, 12]
(a) (1) Calculate the relative molecular mass of carbon dioxide.
...[1]
(ii) Complete the following sentences.
28 g of ethene produces
..g of carbon dioxide and ..
g of water.
[3]
0.7g of ethene produces g of carbon dioxide.
(b) Complete the diagram to show the bonds in a molecule of ethene.
H
H
C C
H
H

The ozone molecule o3 has a permanent dipole moment of 1.8×10−30 cm. although the molecule is very slightly bent-which is why it has a dipole moment-it can be modeled as a uniform rod of length 2.5×10−10 m with the dipole moment perpendicular to the axis of the rod. suppose an ozone molecule is in a 8000 n/c uniform electric field. in equilibrium, the dipole moment is aligned with the electric field. but if the molecule is rotated by a small angle and released, it will oscillate back and forth in simple harmonic motion.what is the frequency f of oscillation?

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Heat energy, carbon dioxide, and water are released through which process? a. photosynthesis b. depolymerization c. digestion d. cellular respiration