The "normal" lead content in human blood is about 0.40 part per million (that is 0.40 g of lead per million grams of blood). A value of 0.80 part per million (ppm) is considered to be dangerous. How many grams of lead are contained in 6.0 x 10^3 (six times 10 to the third power)(the amount in an average adult) if the lead content is 0.62 ppm?
2007-09-16 18:29:48 · 4 answers · asked by lil_vicd 2 in Science & Mathematics ➔ Mathematics
1 million = 0.62
6000 = x
Use ratios
Answer is 0.1033 grams (correct me if I'm wrong, But this is a chemistry question)
2007-09-16 18:34:50 · answer #1 · answered by Suki 4 · 0⤊ 0⤋
The lead content is 0.62 ppm.
That means 10^6 g of blood contains 0.62 g of lead.
So 10^3 g of blood contains 0.62*10^-3 g of lead.
And finally 6*10^3 g of blood contains 6*0.62*10^-3 g of lead.
The answer is 3.72*10^-3 g of lead.
2007-09-16 18:49:30 · answer #2 · answered by dragon88 2 · 0⤊ 0⤋
6x10^3 grams is 6X10^6 milligrams, so 6*.62 = 3.72 milligrams or
.00372 grams of lead
Doug
2007-09-16 18:39:31 · answer #3 · answered by doug_donaghue 7 · 0⤊ 0⤋
152.15
2007-09-16 18:36:57 · answer #4 · answered by a idiot with dreams of wiseman 1 · 0⤊ 0⤋