B. Most rocks are composed of single mineral
It is water soluble so is also soluble in aqueous solutions of NaOH or NaHCO3.
<span>find the volume of the cylinder using the mass and its density V = M / D
so Volume = 12.4 / 2.7 = </span>4.59259259259cm3<span>
Divide by length to get the volume of a 1cm slice: </span>4.59259259259 / 2 = <span>2.2962962963
</span><span>
The cross section area in cm2 = the volume in cm3. </span><span>
Reverse pi r^2 to get the radius, so divide by pi then take the square root.
R = </span>√V / R = <span>0.85494667244cm
hope that helps</span>
