Chapter $2$ Homework Questions CHEM $65$: Name

Write question numbers then your complete answers on separate paper and submit, along with this question page as a cover sheet. If workings required then you must show them for credit.

Briefly explain why blood is a heterogeneous mixture.

Briefly explain why $C_6{H}_{12}{O}_6$ is a pure substance even though it contains a mixture of different elements.

Convert the following standard notation into scientific notation:

$($a$)6000$

$($b$)6000\mathrm{.}0$

$($c$)0\mathrm{.}00500$

$($d$)0\mathrm{.}005$

Convert the following scientific notation into standard notation:

$($a$)7\mathrm{.}0001{10}^7$

$($b$)6\mathrm{.}0000000{10}^{-4}$

$($c$)9{10}^{-3}$

$($d$)3\mathrm{.}100{10}^5$

Identify numbers of significant figures in the following measurements:

$($a$)7\mathrm{.}0100000kg$

$($b$)70100000kg$

$($c$)0\mathrm{.}016700L$

$($d$)0\mathrm{.}0000016700L$

$($e$)100mL$

$($f$)100\mathrm{.}0mL$

Round all measurements in question $9$ above to $2$ significant figures.

Calculate the following and give the unrounded answer and the correctly rounded answer: $(34\mathrm{.}567in)(23\mathrm{.}4in)(17\mathrm{.}917in)=?$

Calculate the following and give the unrounded answer and the correctly rounded answer: in $+65\mathrm{.}8$ in $+9\mathrm{.}1212$ in