In the ground state, only one. But for bonding, all three valence electrons are used, and the atom acquires a slightly excited state.
Put a 2 on the HCl.
2HCl+Ba-->BaCl2+H2
Answer: 0.53g
Explanation:
No of moles= volume ×molarity/1000
We have the volume and the molarity
Volume=4L
Molarity=1.7M
No of moles = 4×1.7/1000
No of moles= 0.0068moles
Remember also that
No of moles= mass given/molar mass
Molar mass of Al(OH)3
Al= 27
O=16
H=1
Molar mass = Al+(O+H)3
Molar mass= 27+(16+1)3
Molar mass= 27+(17)3
Molar mass = 27+51
Molar mass= 78g/mol
To get the mass
Mass given = no of moles × molar mass
Mass= 0.0068×78
Mass= 0.53g
Answer:
reactants : before arrow sign
: CH4 and O2
product : after arrow sign
: CO2 and H2O
the answer is the second option
