There are a total of 32 valence electrons for the H3PO4 Lewis structure. When we have an H (or H2 or H3) in front of a polyatomic molecule (like CO3, SO4, NO2, PO4,etc.) we know that it's an acid. This means that the Hydrogen atoms will be attached to the outside of the oxygen molecules
I do not know if you understand it but this is what my science book said.
To find the number of neutrons.....
NEUTRONS = MASS NUMBER - ATOMIC NUMBER ( PROTONS)
NEUTRONS = 19 - 9
So this element has 10 neutrons
Answer:
41.51 g of CO
Explanation:
The balance chemical equation for given double displacement reaction is,
Fe₂O₃ + 3 CO → 2 Fe + 3 CO₂
Step 1: <u>Calculate moles of Fe₂O₃:</u>
Moles = Mass / M.Mass
Moles = 78.9 g / 159.68 g/mol
Moles = 0.494 moles
Step 2: <u>Calculate moles of CO:</u>
According to equation,
1 mole of Fe₂O₃ reacted with = 3 moles of CO
so,
0.494 moles of Fe₂O₃ will react with = X moles of CO
Solving for X,
X = 0.494 mol × 3 mol ÷ 1 mol
X = 1.482 moles of CO
Step 3: <u>Calculate Mass of CO as:</u>
Mass = Moles × M.Mass
Mass = 1.482 mol × 28.01 g/mol
Mass = 41.51 g of CO
