Answer:
Explanation:
Given that:- The percentage by mass of oxygen in the compound is 44.98 %
Form the formula, it can be seen that:-
4 moles of oxygen atom are present in 1 mole of the compound.
Molar mass of oxygen = 16 g/mol
Mass of 4 moles of oxygen = 4 mol x 16 g/mol = 64 g
Mass of the compound = = 142 g
Mass of aluminum + Mass of magnesium = Total mass - Mass of oxygen = 142 g - 64 g = 78 g
Molar mass of aluminium = 27 g/mol
Moles of aluminum = y moles
Molar mass of magnesium = 24 g/mol
So, 24x + 27 y = 78
Thus, x = 1 and y = 2 (One solution )
Thus, the formula is
D. Testes
Explain: i took health class
I’m not sure but one type of energy is light to heat this happens by the solar panels converting the power to heat for the oven. Another one is radiation to cook a bowl of soup there has to be radiation. Last one I’m not sure but I hope you understand. Hope this also helps too. I send in the comments if I figure it out.