Density = m/v therefore v = m/d v = 25/0.85 v = 29.4117... cm^3 ( = 2.94 * 10^-5 m^3
Answer:
The number of moles of O atom in
mol of
= 1.6
Explanation:
1 molecule of
contains 2 atoms of O
So,
molecules of
contains
atoms of O.
We know that 1 mol of an atom/molecule/ion represents
numbers of atoms/molecules/ions respectively.
So,
molecules of
is equal to 1 mol of
.
atoms of O is equal to 2 moles of O atom.
Hence, 1 mol of
contains 2 moles of O atom.
Therefore,
mol of
contains
moles of O atom or 1.6 moles of O atom.
Because at atmospheric pressure the boiling point is below room temperature, just like Oxygen, Nitrogen etc
Answer:
1.B
2.A
3. B
Explanation:
1. A chemical bond is the physical phenomenon of chemical substances being held together by attraction of atoms to each other through sharing
2. so 2 is electrons of one atom are transferred permanently to another atom.meaning the answer is A
3. is When atoms combine by forming covalent bonds, the resulting collection of atoms is called a molecule. We can therefore say that a molecule is the simplest unit of a covalent compound.
+2
Barium has a positive charge of 2