2. How many grams of methane must be burned to produce 2.05 grams of water in the complete combustion reaction? The unbalanced equation for the reaction is: _CH418) + _ 0218) ►_CO2(8) +_ H2O(8)

0.88 g

Explanation:

The balanced reaction equation is;

CH4(g) + 2O2(g) > CO2(g) + 2H2O(l)

Number of moles in 2.05g of water = 2.05g/18g/mol = 0.11 moles

If 1 mole of CH4 yields 2 moles of water

x moles of CH4 yields 0.11 moles of water

2x = 0.11

x = 0.11/2

x= 0.055 moles

Molar mass of methane = 16 g/mol

Mass of methane = 16 g/mol * 0.055 moles

Mass of methane =0.88 g

both adhesion and cohesion are attractions.

they are different in that adhesion is the force of attraction between the molecules of two different substances, whereas cohesion is the force of attraction between molecules of the same substance.

possible examples include capillary action, in which the adhesion between water and glass causes the water to rise in a narrow tube against the force of gravity.

because of hydrogen bonding, water is extremely cohesive.

this causes molecules on the surface of water to be drawn inward, which is why drops of water form beads on smooth surfaces.

hope this .