ca(HCO3)2 this is what i think it is
Answer:
for combustion of naphthalene is -5164 kJ/mol
Explanation:
where, C refers heat capacity and 
refers change in temperature.
Here, 
So, 
is generally expressed in terms of per mole unit of reactant. Also, should be negative as it is an exothermic reaction (temperature increases).
Molar mass of naphthalene is 128.17 g/mol
So, 1.025 g of naphthalene = 
of naphthalene
= 0.007997 moles of naphthalene
Answer:
B
Explanation:
when two plates come together and one goes underneath, it forms a ridge.
Electrovalent or ionic bonding
Answer:
1
Explanation:
ionic is transfer of electrons from metal to non metal while covalent is sharing electrons between two non metals
