Answer:
116.43 kJ of heat is released when 100.0 g of calcium oxide reacts with excess water.
Explanation:
, ΔH = -65.2 kJ
Mass of calcium oxide = 100.0 g
Moles of calcium oxide = 
According to reaction, 1 mole of calcium oxide on reaction with water gives off 65.2 kilo Joules of heat. Then 1.7857 moles of calcium oxide will give:
116.43 kJ of heat is released when 100.0 g of calcium oxide reacts with excess water.
Answer:
They both have two or more substances.
Explanation:
Let's write the reaction first.
HCl + H₂O ---> H₃O⁺ + Cl⁻
These reaction has two reactants, either the proton donor or the proton acceptor. Water is amphoteric, meaning it can act as an acid or base. Since HCl is an acid, then water in this reaction acts as a base.
1. The proton donor is HCl because it donates H+ to water which yields a hydronium ion, H₃O⁺.
2. The proton acceptor is water.
I think the correct answer from the choices listed above is option C.
Calcium carbonate = CaCO3
sulfur dioxide = SO2
oxygen = O2
calcium sulfate = CaSO4
Carbon dioxide = CO2
The correct skeleton equation for the reaction would be CaCO3(s)+SO2(g)+O2(g) --> CaSO4(s)+ CO2(g).
C
I have had this question on a test before!! Hope this helps
