You are to determine the mass of O2 that can be produced from 25 grams of HgO. Don't forget to balance the equation first!
this is the equation: HgO -> Hg + O2
1.8g of O2.
HgO -> Hg + O2
You will need to balance the equation as you have one atom of O on the left hand side and two on the right hand side.
To determine the mass of O2 that can be produced from 25 grams of HgO, we need to first balance the chemical equation and then use stoichiometry to find the mass.
The balanced equation is:
2 HgO -> 2 Hg + O2
From the balanced equation, we can see that for every 2 moles of HgO, 1 mole of O2 is produced.
Now, we need to convert the given mass of HgO to moles:
Molar mass of HgO = (1 mol Hg × atomic mass of Hg) + (1 mol O × atomic mass of O)
= (1 mol Hg × 200.59 g/mol) + (1 mol O × 15.999 g/mol)
= 200.59 g/mol + 15.999 g/mol
= 216.589 g/mol
Moles of HgO = given mass / molar mass
= 25 g / 216.589 g/mol
= 0.1153 mol HgO
Since the mole ratio between HgO and O2 is 2:1, we can calculate the moles of O2 produced:
Moles of O2 = moles of HgO / 2
= 0.1153 mol HgO / 2
= 0.0577 mol O2
Finally, we can calculate the mass of O2 produced using its molar mass:
Molar mass of O2 = 2 × atomic mass of O
= 2 × 15.999 g/mol
= 31.998 g/mol
Mass of O2 = moles of O2 × molar mass of O2
= 0.0577 mol O2 × 31.998 g/mol
≈ 1.849 g O2
Therefore, approximately 1.849 grams of O2 can be produced from 25 grams of HgO.
To determine the mass of O2 produced from 25 grams of HgO, we first need to balance the equation. The balanced equation for the decomposition of HgO is:
2 HgO -> 2 Hg + O2
Now, we can see that for every 2 moles of HgO, we get 1 mole of O2. To calculate the moles of HgO, we use the molar mass of HgO, which is 216.6 g/mol (200.6 g/mol for Hg and 16 g/mol for O).
Moles of HgO = mass of HgO / molar mass of HgO
Moles of HgO = 25 g / 216.6 g/mol
Moles of HgO ≈ 0.1156 mol
Since the ratio of HgO to O2 is 2:1, the moles of O2 produced will be half of the moles of HgO.
Moles of O2 = 0.1156 mol / 2
Moles of O2 ≈ 0.0578 mol
Finally, we can calculate the mass of O2 produced using the molar mass of O2, which is 32 g/mol.
Mass of O2 = moles of O2 * molar mass of O2
Mass of O2 = 0.0578 mol * 32 g/mol
Mass of O2 ≈ 1.85 g
Therefore, the mass of O2 that can be produced from 25 grams of HgO is approximately 1.85 grams.