What is the mass of 3 moles of barium? Round to the nearest tenth. Don't forget the units.
Look up the atomic mass Ba and multiply by 3. Add the word grams.
To find the mass of 3 moles of barium, you need to know the molar mass of barium (Ba). The molar mass is the mass of one mole of a substance, and it is expressed in grams per mole (g/mol).
The atomic mass of barium (Ba) is approximately 137.33 g/mol. This means that one mole of barium has a mass of 137.33 grams.
To find the mass of 3 moles of barium, you can multiply the molar mass of barium by 3.
Mass of 3 moles of barium = 3 moles x 137.33 g/mol
Calculating this expression, we find:
Mass of 3 moles of barium ≈ 411.99 g
Rounding to the nearest tenth, the mass of 3 moles of barium is approximately 412.0 grams.
Therefore, the mass of 3 moles of barium is approximately 412.0 grams (g).