How many moles are in 15.0 grams of calcium (ca)?

a.) 0.374 moles
b.) 2.67 moles
c.) 601.5 moles
d.) 2.40 x 10 25 moles

The correct answer is option A.) 0.374 moles

Explanation:

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Calcium (Ca) has a mass of 40g / mol

In this case we have 15 g of Ca.

We need to calculate the amount of moles so the operation to be performed is as follows:

mol Ca = 15g * (1mol / 40g) = 0.375 mol

We conclude, after the calculations, that the correct answer is option A.) 0.374 moles

a) the particles of the chair are strongly held together.

nuclear fission produces elements that are heavier than helium.

the elements that are used in nuclear fission and their products are much heavier than helium.