Theoretically, what mass of [Co(NH3)4(H2O)2]Cl2 could be produced from 4.00 g of CoCl2•6H2O starting material. If 1.20 g of [Co(NH3)4(H2O)2]Cl3 is produced, what is the percent yield?

The theoretical yield and percent yield of is 3.93 g and 30.53 % respectively

Explanation:

To calculate the number of moles, we use the equation:

    .....(1)

Given mass of = 4.00 g

Molar mass of = 238 g/mol

Putting values in equation 1, we get:

The chemical equation for the reaction of to form   follows:

By Stoichiometry of the reaction:

1 mole of produces 1 mole of

So, 0.0168 moles of will produce = of

Now, calculating the mass of from equation 1, we get:

Molar mass of = 234 g/mol

Moles of = 0.0168 moles

Putting values in equation 1, we get:

To calculate the percentage yield of , we use the equation:

Experimental yield of = 1.20 g

Theoretical yield of = 3.93 g

Putting values in above equation, we get:

Hence, the theoretical yield and percent yield of is 3.93 g and 30.53 % respectively

14,16 18 reacts with group

the best answer is d because the strong cohesion is caused by the ability of water molecules to undergo hydrogen bonding.

a is incorrect because when water solidifies, it becomes   ice, which expands and occupies a bigger volume for the same mass of water in its liquid state.

b is incorrect because water has high surface tension. besides bonding to itself it hydrogen bonds to other molecules at the top decreasing possibility for breaking of attractive forces.

c is incorrect because the water molecule has oxygen which is highly electronegative and so pulls the electron pair towards itself creating a dipole moment, making the molecule polar.

e is incorrect because water has strong adhesion, ability to stick to other molecules such as glass because of this molecules having stronger hydrogen bonding than water.