if you are given 25 grams of H2O how many grams of H2 can you produce???
i am lost... help
To determine the number of grams of H2 that can be produced from 25 grams of H2O, you need to first understand the stoichiometry (molar ratios) of the reaction that converts H2O to H2. The balanced equation for this reaction is:
2H2O -> 2H2 + O2
From the equation, you can see that 2 moles of H2O react to form 2 moles of H2. This means that the molar ratio between H2O and H2 is 1:1.
To convert grams to moles, you need to use the molar mass of H2O. The molar mass of H2O is calculated by adding the atomic masses of hydrogen (H) and oxygen (O):
Molar mass of H2O = (2 × atomic mass of H) + (1 × atomic mass of O)
= (2 × 1.01 g/mol) + (1 × 16.00 g/mol)
= 18.02 g/mol
Now, you can use the molar mass of H2O to convert grams to moles:
Moles of H2O = given mass of H2O / molar mass of H2O
Moles of H2O = 25 g / 18.02 g/mol
Moles of H2O ≈ 1.387 moles
Since the molar ratio of H2O to H2 is 1:1, the number of moles of H2 produced will be the same as the moles of H2O.
Moles of H2 = 1.387 moles
To convert moles of H2 to grams, you need to use the molar mass of H2. The molar mass of H2 is calculated by adding the atomic masses of hydrogen (H):
Molar mass of H2 = 2 × atomic mass of H
= 2 × 1.01 g/mol
= 2.02 g/mol
Now, you can use the molar mass of H2 to convert moles to grams:
Grams of H2 = moles of H2 × molar mass of H2
Grams of H2 = 1.387 moles × 2.02 g/mol
Grams of H2 ≈ 2.805 g
Therefore, from 25 grams of H2O, approximately 2.805 grams of H2 can be produced.