mercury oxide docomposes to hydrogen and oxygen.The molar mass of HgO is 216.59 mol.The molar mass of O2 is 32 g/mol.How many mols are needed to produce 250 grams of oxygen?

Question

astrophysics · Answer

Do you mean decomposes, $$2HgO -> O_2 + H_2$$ this is your chemical equation.  

We're given molar mass for HgO which is 216.59 mol
Molar mass of O2 is 32 g/mol, and we're given 250 g of oxygen 
We need to find moles of oxygen so we just need this formula $$m = n \times M$$ where n represents number of moles, m is the mass, and molar mass is M.$$n = \frac{ m }{ M }$$ we're given both the mass and molar mass of oxygen, so just plug in the values and you're done.

anonymous · Answer

than you