How many grams of hydrogen must you start with to prepare 5.43g of tungsten?

Express your answer with the appropriate units.

First Recall the equationWO3 + 3H 20Convert S. 43 c to moles of tungstenImole183 . 8914 5 . 43183.8= 0. 0295 molesFrom the equation the mole ratio is 3 : 1Thus moles of hydrogen used is 3...