Ask Question
5 January, 17:50

The natural abundances of elements in the human body, expressed as percent by mass, are: oxygen (O),65 percent; carbon (C), 18 percent; hydrogen (H), 10 percent; nitrogen (N), 3 percent; calcium (Ca), 1.6 percent; phosphorus (P), 1.2 percent; all other elements, 1.2 percent. Calculate the mass in grams of each element in the body of a 62-kg person.

+1
Answers (1)
  1. 5 January, 18:07
    0
    The mass in grams of each element in the body of 62 Kg are

    Oxygen 40300 g

    Carbon 11160 g

    Hydrogen 6200 g

    Nitrogen 1860 g

    Calcium 992 g

    Phosphorus 744 g

    Other elements 744 g

    It is possible to check it adding all the components, the total is 62000 g.

    Explanation:

    Firstly, we have a total mass of 62 Kg and the composition as a percentage of each component.

    Percentage (%)

    Oxygen 65.0

    Carbon 18.0

    Hydrogen 10.0

    Nitrogen 3.0

    Calcium 1.6

    Phosphorus 1.2

    Other elements 1.2

    Taking the definition of a percentage as part of hundred total, each percentage can be expressed as a decimal number. We should divide the percentage with 100 of total. For example: Oxygen 65%, it means 65/100 = 0.65. So, Oxygen is 0.65 in decimal numbers. We do the same for each component.

    Percentage (%) Decimal number

    Oxygen 65.0 65/100 = 0.65

    Carbon 18.0 18/100 = 0.18

    Hydrogen 10.0 10/100 = 0.10

    Nitrogen 3.0 3/100 = 0.03

    Calcium 1.6 1.6/100 = 0.016

    Phosphorus 1.2 1.2/100 = 0.012

    Other elements 1.2 1.2/100 = 0.012

    Finally. We can multiply decimal number of each component taking the total. 1 Kg is equivalent to 1000 g.

    So, 62 Kg = 62 * 1000 g = 62000 g

    After that we get the mass in grams of each element, by multiplying 62000 g and the decimal number of each component as follows:

    Percentage (%) Decimal number Mass in grams (g)

    Oxygen 65.0 65/100 = 0.65 0.65*62000=40300

    Carbon 18.0 18/100 = 0.18 0.18*62000 = 11160

    Hydrogen 10.0 10/100 = 0.10 0.10*62000 = 6200

    Nitrogen 3.0 3/100 = 0.03 0.03*62000 = 1860

    Calcium 1.6 1.6/100 = 0.016 0.016*62000 = 992

    Phosphorus 1.2 1.2/100 = 0.012 0.012*62000=744

    Other elements 1.2 1.2/100 = 0.012 0.012*62000=744
Know the Answer?
Not Sure About the Answer?
Find an answer to your question 👍 “The natural abundances of elements in the human body, expressed as percent by mass, are: oxygen (O),65 percent; carbon (C), 18 percent; ...” in 📗 Chemistry if the answers seem to be not correct or there’s no answer. Try a smart search to find answers to similar questions.
Search for Other Answers