I2 is produced by the reaction of 0.4235 mol of cucl2 to the following euation:
2cucl2 + 4ki ? 2cui + 4kcl + i2
(a) how many molecules of i2 are produced?
(b) what mass of i2 is produced?

For a: The number of molecules of iodine gas produced are

For b: The mass of iodine gas is produces is 26.9 grams.

Explanation:

We are given:

Moles of copper (II) chloride = 0.4235 moles

For the given chemical reaction:

By Stoichiometry of the reaction:

2 moles of copper (II) sulfate produces 1 mole of iodine gas

So, 0.4235 moles of copper (II) sulfate will produce = of iodine gas

According to mole concept:

1 mole of a compound contains number of molecules

So, 0.2118 moles of compound will contain = number of molecules

Hence, the number of molecules of iodine gas produced are

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

We are given:

Moles of iodine gas = 0.2118 moles

Molar mass of iodine gas = 127 g/mol

Putting values in above equation, we get:

Hence, the mass of iodine gas is produces is 26.9 grams.

yes the answer is total mass in unchanged   : )