PLEASE ASSIST URGENTLY :Question $1|$

You find an unknown material in the lab. On the label you read the following:

$Mr=159\mathrm{.}15$

$m-1n10$

c$)$ As the balance was not very accurate you ended up weighing $1\mathrm{.}14g$ of the

material.

You try to dissolve this in $10mL$ but end up needing to add another $10mL$ to finally

dissolve the entire mass. What is the molarity of the sample?

d$)$ You need the concentration to be $0\mathrm{.}25M.$ Can you make this from the solution you

made in c$),$ or will you need to weigh more sample? Explain.

e$)$ What is the mole fraction of each material if the $1\mathrm{.}14g$ of material is dissolved in

$2\mathrm{.}23g$ of methanol?

f$)$ You accidently drop the material that you have been working with and you lose all

the solutions that you have made up to now. You weigh out the last little but of

material of the unknown and find you have $0\mathrm{.}111g$ left. Could you make a $100g$

aqueous solution containing $1\mathrm{.}11\%$ by mass?