Calculate the number of moles of excess reactant that will be left-over when 50.0 g of ki react with 50.0 g of br2: 2ki + br2 2kbr + i2

Answer : The moles of excess reactant, is, 0.1625 mole.

Explanation : Given,

Mass of = 50 g

Mass of = 50 g

Molar mass of = 166 g/mole

Molar mass of = 160 g/mole

First we have to calculate the moles of and .

Now we have to calculate the limiting and excess reagent.

The balanced chemical reaction is,

From the balanced reaction we conclude that

As, 2 moles of react with 1 mole of

So, 0.301 moles of react with moles of

From this we conclude that, is an excess reagent because the given moles are greater than the required moles and is a limiting reagent and it limits the formation of product.

The moles of excess reactant, = Given moles - Required moles

The moles of excess reactant, = 0.313 - 0.1505 = 0.1625 mole

Therefore, the moles of excess reactant, is, 0.1625 mole.

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.