In the reaction with sodium, 15 g of sulfur were reacted. Find the amount of sulfur substance.

univerkov | December 7, 2020 | education

Given:
m (S) = 15 grams
Find: m (Na) =? gram
Decision:
1) Let’s compose the reaction equation:
2Na + S = Na2S
2) Find the amount of substance (S) by the formula: n = m: M
n (S) = 15: 32
n (S) = 0.47 (mol)
3) Find the mass of sodium by the formula m = n * M:
m (Na) = 0.47 * 23 = 10.87 grams
Answer: m (Na) = 10.87 grams

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