How many moles of bromine atoms are in 2.60 * 102 grams of bromine? 1. 0.0152 mol 2. 79.9 mol 3. 10.5 mol 4. 3.25 mol 5. 2.29 mol 6. 0.308 mol 7. 48.6 mol?

Question

Ashly

Chemistry

15 December, 13:58

How many moles of bromine atoms are in 2.60 * 102 grams of bromine? 1. 0.0152 mol 2. 79.9 mol 3. 10.5 mol 4. 3.25 mol 5. 2.29 mol 6. 0.308 mol 7. 48.6 mol?

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Answers (2)

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Brennan Freeman · Answer 1

Moles = mass / molar mass of the bromine atom

the molar mass of bromine atom is 79.904g/mol

mass=2.60 x10^2

therefore the moles of bromine atom=

2.60 x10^2g / 79.904g/mol = 3.25gmoles (answer 4)

Duarte · Answer 2

There are 3.25 mol of bromine atoms in 2.60 x 102 grams of bromine. I reached this answer by converting grams to moles. To do this, I divided the number of grams that I have of bromine by the weight of bromine. The weight of bromine is 80 grams. So my equation looks like this when it is all set up: 2.6 x 10^2 g/80g. The answer to the equation is 3.25 mol.