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How many moles of #CaBr_2# are in 5.0 grams of #CaBr_2#?

Answer 1

Jeremiah Adams

0.25 mol

Molar mass of Calcium Bromide is 200 g #mol^-1#

Calcium Bromide Mass: 5.0 g

moles of Ca#Br_2# = mass of Ca#Br_2# / molar mass of Ca#Br_2#

moles of Ca#Br_2# = 5.0 g / 200 g #mol^-1#

moles of Ca#Br_2# = 0.25 mol

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Answer 2

Peyton Adams

Divide the given mass by the molar mass of CaBr2 (which is approximately 200.11 g/mol) to find the number of moles of CaBr2 in 5.0 grams. Number of moles = Mass (g) / Molar mass (g/mol) Number of moles = 5.0 g / 200.11 g/mol Number of moles ≈ 0.025 moles

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.