Final answer:The number of moles ofCalcium (Ca)in 425 grams of Calcium (Ca) can be found by dividing the mass of sample (425 g) by the molar mass of Calcium (40.08 g/mol). The calculation yields approximately 10.59 moles.Explanation:To calculate the number of moles in agiven mass of an element, you use the molar mass of that element. The molar mass of Calcium (Ca) is approximately 40.08 g/mol. Therefore, you can find the number of moles in 425 g of Calcium by performing the following calculations:First, set up the conversion based on the molar mass: 1 mol Ca = 40.08 grams Ca.Then, convert grams to moles by dividing the given grams (425 g) by the molar mass of calcium (40.08 g/mol).The calculation is: (425 g Ca) / (40.08 g/mol Ca) =10.59 mol of Ca. So, there are approximately 10.59 moles of Calcium (Ca) in 425 grams of Calcium (Ca).Learn more about Mole calculation here:brainly.com/question/33652783#SPJ12...

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