00:02
Hi there! in this question, we are asked to write the formula for these covalent molecules.
00:08
Well, covalent molecules use greek prefixes to tell the reader the number of each type of atom.
00:23
And the prefixes are as follows.
00:26
Prefix mono means one.
00:30
Die means two.
00:33
Tri means three.
00:35
Tetra is four.
00:40
Penta is five.
00:44
Hexa is six.
00:47
Hepta is 7, octa is 8, nona is 9, and deca is 10.
01:04
All right, and if there is no prefix on the first word, then there's only one of those types of atoms.
01:14
No prefix on first element in the name means there's only one, because the prefix mono is omitted from the first word.
01:29
Okay, so using this information, we are ready to start writing the formulas for these.
01:35
Letter a, we have di -carbon, so that means two carbons, tetrafluoride.
01:41
That means four fluorines.
01:45
Right, letter b, tri -boron hexacloride.
01:49
Tri -means three, and it's boron...