Given that electrolytes account for 7% of body weight, what would be the approximate electrolyte mass in a person weighing 100 kg?
Understand the Problem
The question asks you to calculate the mass of electrolytes in a 100 kg person, given that electrolytes account for 7% of body weight. This is a straightforward percentage calculation.
Answer
$7 \text{ kg}$
Answer for screen readers
The mass of electrolytes in a 100 kg person is $7 \text{ kg}$.
Steps to Solve
- Convert the percentage to a decimal
To convert the percentage of electrolytes to a decimal, divide by 100:
$7% = \frac{7}{100} = 0.07$
- Calculate the mass of electrolytes
To find the mass of electrolytes, multiply the person's weight by the decimal value obtained in the previous step:
$Mass_{electrolytes} = 0.07 \times 100 \text{ kg}$
$Mass_{electrolytes} = 7 \text{ kg}$
The mass of electrolytes in a 100 kg person is $7 \text{ kg}$.
More Information
Electrolytes are essential minerals in the body that carry an electric charge. They play a vital role in various bodily functions, including muscle contraction, nerve impulse transmission, and maintaining fluid balance. Common electrolytes include sodium, potassium, calcium, and magnesium.
Tips
A common mistake is forgetting to convert the percentage to a decimal before multiplying. Multiplying 100 kg by 7 (instead of 0.07) would give an incorrect answer of 700 kg, which is clearly not reasonable. Always remember to divide the percentage by 100 before performing the calculation.
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