Question

HELP PLEASE! How many mL are in 27 hL?

Answer 1

Only think you need to remember , is how each prefix relates to the base unit, Liter

Answer 2

ohhh okay, so they all cancel out XD

Answer 3

i just have one question

Answer 4

right, you start with what you are gven 27 hL, then multiply by ratios of 1, to end with the units you want

Answer 5

27 x 10^5 mL

Answer 6

so i would multiply the numbers on the top?

Answer 7

The way i always did these types of probs, and stoichiometry probs, just start with what you are given, dont worry about the numbers, then arrange the ratios of units to cancel correctly, at the very end, just multiply through all the numbers in the top, and divide by all the numbers in the bottom

Answer 8

yeah, vertical line = multiply, horizontal line = divide

Answer 9

oh yes, that seems like a good idea :P sometimes i get confused cause some units don't cancel out correctly.

Answer 10

Just do them backwards to what you are used to, the units come first, then worry about the #s

Answer 11

if you want to post another prob for practice, i can help you though it

Answer 12

i have a question that may seem kinda dumb lol, nut here it goes: when it says divide by all the numbers on the bottom for this problem, do i literally divide it by 10^3?

Answer 13

10^(-3) L = 1 ml

divide by 10^(-3) is the same as multiplying by 10^(+3)

negative exponents you can move to the other side of the fraction and make positive

Answer 14

or if you have a decent calculator, you can type in divide by 10^(-3) if you want

Answer 15

Multiply across all the top numbers,, Then divide by all the bottom numbers

Answer 16

lol, thats the prob, i don't have a calculator for this, thats why im having so much trouble :P

Answer 17

right , so 10^(2) divided by 10^(-3) is the same as
\[\frac{ 10^2 }{ 10^{-3} } = \frac{ 10^2 *10^{3} }{ 1 } = \frac{ 10^{3+2} }{ 1 } = 10^5\]

Answer 18

so the answer is just 27 x 10^5

Answer 19

or
2700000 mL

Answer 20

Ohhhh I finally see it now!!! XD Omg Thanks!

Answer 21

no, prob post more if you want to run through a couple

Answer 22

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Answer 23

those are all you need to remember, how each prefix relates to the base unit Liter, Meter, Gram

Answer 24

Thank you. It seems so much clearer now, I was really struggling to understand anything before :P

Answer 25

cool, post another if you want to practice more

Answer 26

okay :D

Answer 27

new question thread

Answer 28

okay