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Chemistry 21 Online
OpenStudy (anonymous):

Stoichiomety PLease! omeone help me i have an exam in a few hours and need to get this. 2Na +2H20===>2NaOH+H2 .if 3.5g of sodium was used how many moles of hydrogen would be produced?

OpenStudy (jfraser):

the balanced reaction tells us a MOLE ratio, but you have MASS of sodium. use the molar mass of sodium to find the moles of sodium in 3.5g first, then use the molar ratio from the balanced reaction

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