It would take 1.16 h for the runner to finish the race
.
<em>Step 1. </em>Convert <em>kilometres to miles</em>.
11 km × (0.621 mi/1 km) = 6.83 mi
<em>Step 2</em>. Calculate the <em>time</em>.
Time = 6.83 mi × (1 h/5.7 mi) = 1.16 h
<span>Avogadro's number
represents the number of units in one mole of any substance. This has the value
of 6.022 x 10^23 units / mole. This number can be used to convert the number of
atoms or molecules into number of moles.
45.6 g Au ( 1 mol / 196.97 g ) ( </span>6.022 x 10^23 atoms / mole ) = 1.39x10^23 atoms Au
Carbon dioxide is a gaseous molecule made up of the elements, C and O. Each mole of carbon dioxide has one mole C and two mole oxygen atoms.
Molar mass of carbon dioxide (
)=
Percentage by mass of carbon = 
Percentage by mass of oxygen = 
Therefore C is 27.3 % and O is 72.7 % by mass in 1 mol CO
It could be a tide pool but this is pretty vague
