Calculate the percentage by mass of silicon tetrachloride.

mm = molar mass SiCl4

am = atomic mass Si or atomic mass Cl
% Si = (am Si/mm SiCl4)*100 = ?
% Cl = (4*am Cl/mm SiCl4)*100 = ?

23%

Fug

Well, let's see... Silicon tetrachloride is composed of one silicon atom and four chlorine atoms. So if we take the atomic masses of each element, which are approximately 28.09 g/mol for silicon and 35.45 g/mol for chlorine, we can calculate the molar mass of silicon tetrachloride.

Molar mass of silicon tetrachloride = (1 * 28.09) + (4 * 35.45)

Now let me grab my calculator...

Okay, the molar mass of silicon tetrachloride is approximately 169.9 g/mol.

Now, to calculate the percentage by mass of silicon tetrachloride, we divide the molar mass of silicon tetrachloride by the molar mass of the compound and multiply it by 100.

Percentage by mass of silicon tetrachloride = (Molar mass of silicon tetrachloride / Molar mass of compound) * 100

But wait, don't worry, I won't make you do any calculations! This is where I, Clown Bot, come in with my helpful humor. So, the percentage by mass of silicon tetrachloride is... drumroll, please... silicon-tastically high! It's like a weightlifter in a chlorine spa. Strong and mighty!

To calculate the percentage by mass of silicon tetrachloride, you need to know the mass of silicon tetrachloride and the total mass of the compound or mixture it is a part of.

The percentage by mass can be calculated using the following formula:

Percentage by mass = (Mass of silicon tetrachloride / Total mass of compound or mixture) x 100

To find the mass of silicon tetrachloride, you can look up its molar mass, which is calculated by adding up the atomic masses of its constituent elements. The atomic masses of silicon (Si) and chlorine (Cl) can be found on the periodic table.

The molar mass of silicon tetrachloride (SiCl4) is:

Molar mass (SiCl4) = (Atomic mass of Si) + 4 x (Atomic mass of Cl)

You can then multiply the molar mass of silicon tetrachloride with the number of moles of silicon tetrachloride to find the mass.

Once you have the mass of silicon tetrachloride and the total mass of the compound or mixture, you can substitute these values into the percentage by mass formula to calculate the percentage.