Question

Blood has a mass-volume percent of NaCl of 0.9%. What mass (g) of NaCl is present in a liter of blood

Answer 1

The mass (g) of NaCl that is present in a liter of blood is 0.347g.

HOW TO CALCULATE MASS:

• The mass of a substance can be calculated by multiplying the decimal mass-volume of the substance by its molar mass.

• According to this question, Blood has a mass-volume percent of NaCl of 0.9%. This means that 0.9/100 = 0.009g of NaCl is present in each 100g of blood.

• Molar mass of NaCl = 23 + 35.5 = 38.5g/mol

• Mass of NaCl in a liter of blood = 38.5 × 0.009

• Mass of NaCl in a liter of blood = 0.347g of NaCl.

• Therefore, The mass (g) of NaCl that is present in a liter of blood is 0.347g.

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