Can you help me determine moles of a product?

Using the following balanced reaction, determine how many moles of hydrogen gas (H2) are produced from 5.00 g Na:


2Na + 2H(subscript 2)O ---------2NaOH +H(subscript 2)


a. 2.5 moles


b. 0.109 moles


c. 0.217 moles


d. 0.435 moles


e. not enough information





Thank you

Can you help me determine moles of a product?
the answer is a) 0.109 mole





first you have to find number of moles. since you are given the mass of Na,





no of moles of Na = 5/23


= 0.21739





from the equation, (no of moles of H2) / (no of moles of Na) = 1/2





so therefore, no of moles of H2 = 1/2 x 0.21739


= 0.1086


= 0.109 moles (3sf)





hope this helps! :D