For the reaction 2H2 + 1O2 à 2H2O, there are 8.08 grams of H2 available.

2. Use the ratio of stoichiometric coefficients in the reaction above to determine how many moles of H2O can be produced from the H2 available.
Then, use molar mass to convert the moles of H2O into grams.

The answer I got is 324.36 grams

mol of H2 is 2 grams

8.08/2 = 4.04 mols
so
4.04 mols of H2O produced
H2O = 2+16 = 18 grams per mol

18 * 4.04 = 72.7 grams

To determine how many moles of H2O can be produced from the given amount of H2 (8.08 grams), we need to use the stoichiometry of the reaction.

1. Determine the molar mass of H2:
The molar mass of H2 is 2 grams/mol.

2. Convert the mass of H2 to moles:
Using the molar mass of H2, we can calculate the number of moles of H2:

moles of H2 = mass of H2 / molar mass of H2
= 8.08 grams / 2 grams/mol
= 4.04 moles

3. Use the stoichiometric coefficients in the balanced equation:
The balanced equation tells us that 2 moles of H2 react to produce 2 moles of H2O.

moles of H2O = (moles of H2) x (moles of H2O / moles of H2)
= 4.04 moles x (2 moles of H2O / 2 moles of H2)
= 4.04 moles

So, from the given 8.08 grams of H2, we can produce 4.04 moles of H2O.

4. Convert moles of H2O to grams:
To convert moles of H2O to grams, we need to know the molar mass of H2O.

The molar mass of H2O is 18 grams/mol.

To calculate the mass of H2O:

mass of H2O = moles of H2O x molar mass of H2O
= 4.04 moles x 18 grams/mol
= 72.72 grams

Therefore, the correct answer is 72.72 grams, not 324.36 grams.

To determine how many moles of H2O can be produced from the given amount of H2, we need to use the stoichiometric ratio between H2 and H2O in the reaction.

In the balanced equation, the stoichiometric coefficient of H2 is 2, which means that for every 2 moles of H2, 2 moles of H2O are produced.

To calculate the number of moles of H2O, we can use the following formula:

moles of H2O = moles of H2 × (stoichiometric coefficient of H2O / stoichiometric coefficient of H2)

Given that there are 8.08 grams of H2, we need to convert this amount to moles using the molar mass of H2.

The molar mass of H2 is approximately 2.02 g/mol.

moles of H2 = mass of H2 / molar mass of H2
moles of H2 = 8.08 g H2 / 2.02 g/mol = 4 moles H2

Now, let's calculate the moles of H2O using the stoichiometric ratio:

moles of H2O = 4 moles H2 × (2 moles H2O / 2 moles H2)
moles of H2O = 4 moles H2O

Therefore, from the given amount of H2, 4 moles of H2O can be produced.

To convert this into grams, we can use the molar mass of H2O:

The molar mass of H2O is approximately 18.02 g/mol.

grams of H2O = moles of H2O × molar mass of H2O
grams of H2O = 4 moles H2O × 18.02 g/mol = 72.08 grams

So, the correct answer is 72.08 grams of H2O, not 324.36 grams.