CSSA trial error or help needed (1 Viewer)

[ben7]

Its a fairly simple question, its to do with the CASSA 2004 trial Q23. it says there is 0.1% sulfur in the coal in the and 10million kgs is burnt in the Q... which is 1.0 x 10^10g right?

in the solutions to get the mass of S the multiply the (1.0 x 10^10)g by 0.01% and get (1 x 10^6).

I would have thought it would be (1.0 x 10^10) x 0.1/100 to get mass of sulfur

now is that a mistake or logic to there answer that my simple brian is missing?

im fine with the rest of it.

Thanks,
Ben

 

[Tommy_Lamp]

no your getting the .01% wrong.
remember, when determining the % of something, you have to divide the percentage by 100, that means .01/100 = .0001

 

[smallcattle]

0.01% is 0.01/100

0.1% is 0.1/100

 

[ben7]

i realise that but dont the want 0.1% whcih is 0.1/100 which = 0.001.
they are finding 0.01% multiplying it by 0.0001

 

[Tommy_Lamp]

ok i looked at the actual question and answer sheet and it seems as if they made a mistake, the question specifies .1% and the answer states .01%

 

[ben7]

Ok cool. thanks, just wanted to clear it up.

 

[richz]

yes, i saw this too, does anyone else agree??