ANSWERED How many g of potassium must react with H20 to produce 1.60 L of H2 at STP according to the following equation?

Answer 1

You need the balanced chemical reaction equation :
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2 K + 2 H2O ----. 2 KOH + H2

moles H2 = n H2 = ( 1.60 L ) ( 1 mol H2 / 22.4 L H2 ) = 0.07143 moles H2

moles K = n K = ( 0.07143 mol H2 ) ( 2 mol K / 1 mol H2 ) = 0.14286 moles K

mass K = m K = ( 0.14286 mol K ) ( 39.10 g K / mol K )

mass K = m K = 5.56 g of potassium <---

Answer : 5.56 g of potassium

Answer 2

2K + 2H20 -> H2 + 2KOH is the equation so please HELP!!!