Calculating the mass of a reactant The reaction between H2 and O2 and produces 26.2 g water. How many grams of O2 reacted?​

23.3 grams

Explanation:

First we'll need the balanced equation for this equation.

2H₂ + O₂ → 2H₂O

This shows us that we need one mole of O₂ to produce two moles of water.

Now we need to convert grams to moles.

There is 18.01528 g for every mole of water

26.2/18.01528 = 1.454321

There 1.454321 moles of water produced

Remember that two moles of water are produced from a gram of O₂

1.454321/2 = 0.72716

0.72716 moles of O₂ were used

Now convert moles back to grams. There are 31.998 g for every mole of O₂

31.998 x 0.72716 = 23.2677

23.2677 grams of oxygen were used

in chemistry, adhesion and cohesion are attractive forces that exist between molecules. they hold the molecules together from each other. they are different in that adhesive force exists between molecules of different substance while cohesive force happens between molecules of same substance.

adhesion between water and glass causes water molecules at the edge of water and glass interface to climb up the wall in a narrow glass tube. this is called capillary action. cohesion is what gives glass its shape and causes water to form a droplet.