What is the kinetic energy, in joules, of a molecule of carbon tetrachloride moving at a speed of 255 m s–1 (use the appropriate prefix to avoid exponential notation)?

The kinetic energy of a molecule of carbon tetrachloride is 8.29 zJ.

Explanation:

The kinetic energy of a molecule of carbon tetrachloride is given by:

Where:

m: is the mass

v: is the speed = 255 m/s                            

To find the mass we need to find the molar mass for CCl₄, and use the Avogadro's number, knowing that in 1 mol of carbon tetrachloride we have 6.022x10²³ molecules:

A (C) = 12.011 g/mol

A (Cl) = 35.45 g/mol

The molar mass (M) of CCl₄ is:

Now, the mass of 1 molecule of CCl₄ is:

Finally, the kinetic energy of a molecule of carbon tetrachloride is:

Therefore, the kinetic energy of a molecule of carbon tetrachloride is 8.29 zeptoJoule.

I hope it helps you!

there are two significant figures.

0.88m hope i am correct : )