Answer :
Final answer:
To calculate the amount of calcium in a 173-pound man with 1.4% of body mass as calcium, first convert pounds to kilograms (173 lbs to 78.47 kg), then find 1.4% of that mass, which equals approximately 1.1 kg of calcium.
Explanation:
To find how many kilograms of calcium are there in a 173-pound man when 1.4% of the mass of a human body is calcium, we need to convert the man's weight from pounds to kilograms. Then, we calculate 1.4% of that mass.
First, let's convert the weight from pounds to kilograms. Because 1 pound is equivalent to approximately 0.453592 kilograms:
173 pounds × 0.453592 kilograms/pound = 78.47 kilograms
Now, we calculate the mass of calcium by taking 1.4% of the man's body mass in kilograms:
1.4% of 78.47 kilograms = 0.014 × 78.47 kilograms = 1.09858 kilograms
Therefore, the mass of calcium in a 173-pound man is approximately 1.1 kilograms.
The correct answer is b. 1.1 kg Ca.
