How many molecules of NH3 are produced from 4.56x10^-4 g of H2

Write the equation and balance it.

Convert 4.56E-4 g H2 to moles. mols = grams/molar mass

Use the coefficients in the balanced equation to convert mols H2 to mols NH3.

Convert mols NH3 to molecules. Remember 1 mol NH3 contains 6.02E23 molecules.

To determine the number of molecules of NH3 produced from the given mass of H2, you need to follow these steps:

Step 1: Find the moles of H2
Use the molecular weight of H2 to convert the mass given into moles. The molecular weight of H2 is 2 g/mol. Use the formula:

Moles = Mass / Molecular Weight

Moles of H2 = 4.56x10^-4 g / 2 g/mol

Step 2: Use stoichiometry to determine moles of NH3
The balanced equation for the reaction of H2 producing NH3 is:

3H2 + N2 -> 2NH3

This equation shows that 3 moles of H2 react to produce 2 moles of NH3. Since the stoichiometric ratio is 3:2, you can set up a proportion to find the moles of NH3.

2 moles of NH3 / 3 moles of H2 = x moles of NH3 / moles of H2

Solve for x:

x = (2/3) * moles of H2

Step 3: Convert moles of NH3 to molecules
Since 1 mole of any substance contains 6.022x10^23 molecules (Avogadro's number), you can use this conversion factor to find the number of molecules of NH3.

Molecules of NH3 = Moles of NH3 * (6.022x10^23 molecules/mol)

By following these steps, you can determine the number of molecules of NH3 produced.