A molecule has the molecular formula CH3(CH2)4CH3. How many H and C atoms does it contain?

Question

i really need the awnser it is a test on monday and i am revisning please can someone tell me the awnser!?!

Answer 1

Spell it out:

CH3CH2CH2CH2CH2CH3

Add it up: 3 + 2 + 2 + 2 + 2 + 3 = 14 H's; 6 C's

Easier: this is a saturated compound. 6 C's (by counting). Formula, for a saturated hydrocarbon

H's = 2 x C's + 2 = (in this case) 2 x 6 + 2.

Challenge problem: why does that formula always work for saturated hydrocarbons?

Answer 2

you may nicely be perplexed over the words. Empirical potential the backside ratio of the atoms, and molecular formula potential the finished style of atoms in the molecule. Empirical: C4H9 Molecular: C8H18 in different words, an octane.

Answer 3

You have 6 carbon atoms and 14 hydrogen atoms.

Just make sure that whenever you have a "(A)" followed by a subscript (a number let's say X), you have X number of A's.

So for this molecular formula:

CH3-CH2-CH2-CH2-CH2-CH3