The mass of oxygen and hydrogen must be equal to the mass of the substance they create the water. So if the hydrogen is 2.8 g the oxygen must account for the rest of the mass. Basically just subtract 25.4-2.8=mass of oxygen
<span>Answer:
Moles HgO = 10.36 g/ 216.59 g/mol= 0.048
the ratio between HgO and O2 is 2 : 1
moles O2 formed = 0.048/ 2= 0.024
at STP one mole of any gas occupies 22.4 L
Volume O2 = 0.024 x 22.4 L/mol = 0.54 L</span>
What does percent composition tell you about a molecule?
O A. It tells you the ratio of elements in the molecular formula.
O B. It tells you how the elements are arranged in the molecule.
O C. It gives you the total number of atoms in the molecule.
D. It tells you how much of a molecule is made up of each element.
It’s B
Answer:
Using the Formula Fc = (Valence Electrons) - (Unbound Electrons) - (N bonds in the atom)
Explanation:
Concept: Formal Charge
Let's remember the concept of formal charge as the electric charge of an atom in a given molecule, it is calculated as it follows:
Fc = (Valence Electrons) - (Unbound Electrons) - (N bonds in the atom)
So to answer the question and by knowing the molecule, we can tell
a) Fc + Unbound Electrons + N Bonds of the atom = Valence Electrons, if the valence electrons are fewer than the actual electrons of the atom, it means it is missing electrons.
b) let' s remember the concept of expanded octet as an atom and the Lewis Structure having more than 8 electrons.
So if you sum the Valence Electrons and the N bonds in the atom multiplied by two (There are two electrons in 1 bond) and this number is greater than 8, you could say it has an expanded octet