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

In a laboratory experiment, a fermenting aqueous solution of glucose and yeast produces carbon dioxide gas and ethanol. the solution was heated by burning natural gas in a bunsen burner to distill the ethanol that formed in the flask. during the distillation, the ethanol evaporated and then condensed in the receiving flask. the flame of the burner was kept too close to the bottom of the flask and some of the glucose decomposed into a black carbon deposit on the inside of the flask. during this experiment the following changes occurred. which of these changes involved a physical change and not a chemical change? check all that apply. 1-condensation of ethanol 2-evaporation of ethanol 3- formation of carbon dioxide gas from glucose burning of natural gas 4-formation of ethanol from glucose by yeast 5-formation of a carbon deposit inside the flask

Water's surface tension and heat storage capacity are accounted for by its a) orbitals b) weight c) hydrogen bonds d) mass e) size

What is the correct equation for cellular respiration?