If 4.34 moles of potassium react with excess water, how many moles of hydrogen gas would be produced at STP

2.17 mol

Explanation:

Given data:

Number of moles of potassium = 4.34 mol

Moles of hydrogen gas produced at STP = ?

Solution:

Chemical equation:

2K + 2H₂O  →  2KOH + H₂

Now we will compare the moles of hydrogen and potassium.

                           K            :           H₂

                            2           :            1

                            4.34      :          1/2×4.34 = 2.17 mol

So, from 4.34 moles of potassium 2.17 moles of hydrogen are produced at STP.

the earth would become to overheated and everything alive on it will eventually die from overheating. plants will eventually die as well, water will evaporate, and it will be nothing but a hot planet without anything living on it.

answers: to make sure that all of the broken pieces of tablet were added to the water, to allow for fair comparison of all three trials, with different particle sizes to avoid experimental error