What I want to do is work out what is the total weight of each element in the lithosphere.
I’ve a list of elemental abundance in said lithosphere here.
I also know that the weight of the lithosphere is 1.5 x 10 to the 23 kg.
And I want the answer in tonnes.
This is entirely obvious therefore: multiply the abundance in parts per million (as measured by weight, of course) by the weight of the lithosphere. And do that for each element.
But I’m getting entirely lost in a welter of zeros all floating about. Is 1.5 x 10 to the 23 kg actually 1.5 x 10 to the 20, or to the 19 tonnes? Is one part per million 10 to the minus 6 tonnes or minus 7?
I tried cranking through this and it tells me that rhenium (0.0004 ppm) is actually 6 billion tonnes. And that just doesn’t seem right.
I’m sure this is something that is relatively trivial to do in a spreadsheet but I don’t know how to use one of those.
All I want is element by ppm in the lithosphere times weight of the lithosphere. With the answer in metric tonnes.