Tin Stp

Tin Stp
Chemistry question!?

Use: Sn 2 HF ----> ESM (2) + H (2) A. How many liters of HF are needed to produce 9.40 liters of H (2) under normal conditions? B. How many molecules of H (2) are produced by the reaction of tin with 20 liters of HF CN? C. How many grams SNG (2) can be made 7.42.x10 reactions to the 24th power molecules of HF with tin? **** Figures in parentheses are the numbers small that are at the bottom. example: H (2) O = WATER

a. ? HF = 9.40 liters liters H2 @ 2 HF / 1 H2 = 18.8 liters =============================== = B. ? 20 liters liters H2 = HF @ 1mol H2 / 2 mol HF = H2 10 liters? H2 moles H2 = 10 liters @ STP if 1 mole / 22.4 liters = 0.446 moles of H2? molecules = 0.446 moles@6.02 E 23 = your answer: 2,69 E23 hydrogen molecules ===================================== ==== C. How many grams of ESM (2) can be made 7.42.x10 reactions to the 24th power molecules of HF with tin? 24 molecules 7.42.e HF @ 1 mol / 6.02e23 molecules = 12.3 moles 12.3 moles of HF HF @ 1 SnF2 mol / 2 mol HF = 6.16 mol SnF2@156.7 moles SnF2 6.16 g / mol = response = 966 grams of SnF2