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ella [17]
3 years ago
9

Creatinine, , is a by-product of muscle metabolism, and creatinine levels in the body are known to be a fairly reliable indicato

r of kidney function. The normal level of creatinine in the blood for adults is approximately 1.0 mg per deciliter (dl) of blood. If the density of blood is 1.025 g/ml, calculate the molality of a normal creatinine level in a 60.0-ml blood sample.
Chemistry
1 answer:
raketka [301]3 years ago
6 0

Answer;

Molarity = 88.25 μmol/L

Explanation;

The creatinine has a concentration of 1 mg / deciliter or 10 mg / liter of blood.

( 1 dL = .1L)  

note; we don't need the volume of the sample  

1 liter of blood weighs 1025 g so mg creatinine / kg of blood

= 10 x 1000 / 1025 = 9.756 mg creatinine / kg of blood  

Molecular weight of C4H7N3O is 113.12 g/mol  

moles of creatinine = 9.756 / 113.12 = 0.0862 / kg  

molality of the creatinine in blood = 8.62 X 10 ^ -5 mol / Kg of blood  

or 86.2 x 10 ^ -6 mol / kg or 86.2 μmol/ Kg  

86.1 * 1.025 μmol/ L = 88.25μmol/ L

Molarity = 88.25 μmol/L


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