Use the table to determine what the correct formula for magnesium oxide is.
2 answers:
Answer:
MgO
Explanation:
From the table, Mg atom has 2 valence electrons while oxygen atom has a deficit of 2 valence electrons.
When the two atoms react together, the 2 valence electrons from the Mg atom are donated to compensate for the 2 deficit electrons in the oxygen atom.
Hence, one atom of Mg is required to react with one atom of oxygen to produce MgO with each atom having stable shells.
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Answer:
77 L of water can be made.
Explanation:
Molar mass of = 32 g/mol
So, 55 g of =
mol of
= 1.72 mol of
As hydrogen is present in excess amount therefore is the limiting reagent.
According to balanced equation, 1 mol of produces 2 mol of
.
So, 1.72 mol of produce
mol of
or 3.44 mol of
.
Let's assume gas behaves ideally at STP.
Then, , where P, V, n, R and T represents pressure, volume, no. of moles, gas constant and temperature in kelvin scale respectively.
At STP, pressure is 1 atm and T is 273 K.
Here, = 3.44 mol and R = 0.0821 L.atm/(mol.K)
So,
Option (b) is correct.
Answer:
All you have to do is count the number of electrons in the shells and place them according to the atomic number. I just did it.
Explanation:
