If 3.15g of mercury oxide are thermally decomposed to mercury and oxygen, what mass of oxygen Will be produced?
2HgO ==> 2Hg + O2
mols HgO = grams/molar mass = ?
1 mol O2 = 1/2 mols HgO
Then grams O2 = mols O2 x molar mass O2
Post your work if you get stuck.
To calculate the mass of oxygen produced, we need to know the molar mass of mercury oxide (HgO).
The molar mass of mercury (Hg) is 200.59 g/mol, and the molar mass of oxygen (O) is 16.00 g/mol.
The molar mass of mercury oxide (HgO) is the sum of the molar masses of mercury and oxygen:
Molar mass of HgO = Molar mass of Hg + Molar mass of O
= 200.59 g/mol + 16.00 g/mol
= 216.59 g/mol
Now, we can calculate the moles of mercury oxide:
Moles of HgO = Mass of HgO / Molar mass of HgO
= 3.15 g / 216.59 g/mol
≈ 0.0145 mol
According to the balanced equation for the thermal decomposition of mercury oxide, the ratio of moles of HgO to moles of O is 1:1.
So, the moles of oxygen produced will also be approximately 0.0145 mol.
Finally, we can calculate the mass of oxygen produced:
Mass of O = Moles of O * Molar mass of O
= 0.0145 mol * 16.00 g/mol
= 0.232 g
Therefore, approximately 0.232 grams of oxygen will be produced.
To find the mass of oxygen produced when 3.15g of mercury oxide (HgO) is thermally decomposed, we need to use the balanced chemical equation for the reaction:
2HgO(s) → 2Hg(l) + O2(g)
According to the equation, 2 moles of HgO decompose to produce 1 mole of O2. To determine the mass of O2 produced, we need to follow these steps:
Step 1: Calculate the molar mass of HgO.
The molar mass of HgO can be calculated by adding the atomic masses of mercury (Hg) and oxygen (O) together:
Molar mass of HgO = atomic mass of Hg + atomic mass of O
Using the periodic table, the atomic mass of Hg is 200.59 g/mol, and the atomic mass of O is 16.00 g/mol. Therefore:
Molar mass of HgO = 200.59 g/mol + 16.00 g/mol
= 216.59 g/mol
Step 2: Calculate the number of moles of HgO.
To find the number of moles, we can use the formula:
Moles = Mass / Molar mass
Given that the mass of HgO is 3.15 g and the molar mass of HgO is 216.59 g/mol:
Moles of HgO = 3.15 g / 216.59 g/mol
Step 3: Calculate the number of moles of O2 produced.
Since the balanced chemical equation states that 2 moles of HgO produce 1 mole of O2, we can use the ratio:
Moles of O2 = (Moles of HgO) / 2
Step 4: Calculate the mass of O2 produced.
To calculate the mass of O2, we use the formula:
Mass = Moles × Molar mass
Given that the molar mass of O2 is 32.00 g/mol:
Mass of O2 = (Moles of O2) × 32.00 g/mol
By following these steps, you can calculate the mass of oxygen produced when 3.15g of mercury oxide is thermally decomposed.