The molar mass of oxygen is 32 g.
1,2 mg oxygen is equal to 0,0000375 moles.
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8,23.1023 atoms Mg is equivalent to 1,366 moles.
There are 18.9 moles in 225.8 mg. This is a math problem.
When 4 moles of Mg react with O₂, they will form 4 moles of MgO because the ratio of Mg to MgO is 1:1. Therefore, for every mole of Mg that reacts, one mole of MgO is formed. So, in this case, since there are 4 moles of Mg, 4 moles of MgO will be produced.
The answer is 0,615 moles.
To find the number of moles in 1.346g of Mg, you need to divide the mass by the molar mass of Mg (24.305 g/mol). 1.346g Mg / 24.305 g/mol = 0.055 moles Mg