Question

I know this is a Chemistry question but there aren't helpers there so... I figured everything else out but I just need help on the last step that I am doing:

M(HBr) = 0.50 moles / 0.030 L = M

To further explain what I'm asking, I need help calculating the concentration of HBr.
Formula - M=n/V
n = 0.50 mol
V = 0.030 L

So as listed above, the set up of the formula would be:
M(HBr) = 0.50 moles / 0.030 L = M

And I need help finding M

Answer 1

You're perfectly on track, all you have to do now is punch in the numbers.
\[\frac{ 0.50mol }{ 0.030L }=16.6666M = 17M\]
17 because of significant figures.

Answer 2

Thank you!

Answer 3

That's what I got too, but a lot of the examples my school gave us was around "0.0(additional two digits here)."

For example:
M(HCl) = 0.003 moles ÷ 0.025 L = 0.12 moles/L or 0.12M

Answer 4

So when I got 16.6666/17, I thought it was just way too high.

Answer 5

Interesting. Yeah, your example should only have 1 sigfig. And yes, concentrations of 17M are hardly found, at least that's what I've had throughout my Chem learning. It's always tiny, like 0.00000123...

Answer 6

Yeah, well thank you so much for your help! If it's wrong, it's probably from what I did in the earlier steps lol. I hate doing Titrations lol

Answer 7

I'd better warn you then... if you keep going into higher chem you'll be doing titrations regularly ;P

Answer 8

Oh man lol. Would it be too much to ask you to check my work? I have everything filled out, but just would like an extra set of eyes on it, if you don't mind.

Answer 9

Go ahead.