<p>what is the price for a million (1.0 x 10^6) atoms of Pt, given that a cube 1.0 in. on an edge costs $550? The density of Pt is 22.0g/mL</p>
<p>what does "on an edge" mean?</p>
<p>and how can i solve this</p>
<p>where do i go to convert it? im trying and get stuck on converting the cube 1.0 in... im not sure what on an edge means.</p>
<p>thanks.</p>
<p>well, at least people attempt to be smart here.</p>
<p>I'm reading it as the cube has an edge of 1.0 in. But I'm probably wrong (Note: I haven't taken AP Chem yet).</p>
<p>there are 6 edges in a cube.</p>
<p>i have absolutely no clue how to do this. >_></p>
<p>in fact, i just need to get help on this Q.</p>
<p>thanks.</p>
<p>well first u need the radius/diameter of the atom of Pt from a periodic table or textbook. Convert inch into SI unit preferably meter. Calculate how many Pt atoms u did to make that cube. Then calculate how many cubes u can make and times that with the money per each cube.</p>
<p>oh yeh u r probably going to find the units in angstroms. I think that's 1*10^-10. Convert that to meters first.</p>
<p>the edge of the cube is 1 inch.</p>
<p>you don't need the radius of Pt.. this problem is simple after you figure out how to convert cubic inches into cubic centimeters (1 cm^3=1 ml).. then you can use the density to calculate the price per gram... then use the atomic mass of Pt and Avagadro's number and pop out the cost.</p>
<p>well that too works.</p>
<p>in your way (using the radius) it gets more complicated because you'd have to account for the packing arrangement of the Pt atoms ... cubic close pack, vs. hexagonal close pack.. it'd just get messy and time consuming.</p>
<p>well yeh i know but it's cubic close pack isn't it? just out of curiousity Because it said cube and metals all form metallic bonds that form cubes?</p>
<p>i admit that ur way is better. i have to write down stuff for stoichemetry problems. Can't really do them in my head lol although i took AP.</p>
<p>I'll admit that I don't know the packing arrangement of solid Pt metal, but not all metals are CCP. I know Zn, Ti, Co are HCP.. but you won't need to know which metals are what... always look for the simple solution to problems.</p>