To determine how many grams are in 238 moles of arsenic, we need to use the molar mass of arsenic. Arsenic has a molar mass of approximately 74.92 grams per mole.
We can calculate the total mass in grams by multiplying the number of moles by the molar mass:
Mass (grams) = Number of moles × Molar mass (grams/mole)
So, for 238 moles of arsenic:
Mass = 238 moles × 74.92 grams/mole
Calculating this gives:
Mass = 238 × 74.92 ≈ 17858.56 grams
Therefore, there are approximately 17858.56 grams in 238 moles of arsenic.