Question

If 17.8 g grams of lithium (Li) are combined with 50.0 grams of water (H20) there is

24.7 grams of hydrogen gas (H2) produced. How much lithium hydroxide (LiOH) was
also produced?

Answer 1

Step-by-step explanation:

Li+H2O..................LiOH+H2

mass of Li=17.8 g

No of moles of Li=17.8/7=2.5

mass of H2O=50.0 g

No of moles of H2O=50.0/18=2.8

limiting reagent is Li so 1 mole of Li produce 1 mole of LiOH therefore 2.5 mole of Li produce 2.5 moles of LiOH now we have to convert it into grams

moles=given mass/molar mass

given mass=moles*molar mass

molar mass of LiOH=24

mass=2.5*24=60 gram