If 1.4% of the mass of the human body is calcium, how many kilograms of calcium are there in a 86.5 pound boy?
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Ответ:
Explanation:
Translation:
What volume will 12g of iron occupy?SolutionIron is a solid substance at room temperature. You can find the volume of solids (and of not solids) using the density.
You can obtaindthe density of most pure substances in the internet. The density of iron at room temperature is 7.874 g/cm³.
Thus, substituting in the formula, you get:
The answer is rounded to two significant figures because the input, 12g, has two significant figures.