Answer:
56 g. Option 3.
Explanation:
The reaction is: CaCN₂ + 3H₂O → CaCO₃ + 2 NH₃
1 mol of calcium cianide reacts with 3 moles of water in order to produce 1 mol of calcium carbonate and 2 moles of ammonia
We have the mass of each reactant, so let's convert the mass to moles:
45 g. 1mol / 80.08 g = 0.562 moles of cianide
45 g. 1mol / 18 g = 2.5 moles of water
The cianide is the limiting reactant:
3 moles of water need 1 mol of cianide to react
Then, 2.5 moles of water will need (2.5 . 1)/ 3 = 0.833 moles
As we have 0.562 moles of CN⁻ we don't have enough
We can work now, on the reaction:
Ratio is 1:1. Therefore 0.562 moles of cianide will produce 0.562 moles of carbonate
Let's convert the mass to moles to find the answer:
0.562 mol . 100.08 g / 1 mol = 56.2 g
Decomposition reaction D. 2H20⇒ 2H2 + O2
<h3>Further explanation
</h3>
Every chemical reaction involves a compound consisting of reactants and products
Reactants are compounds that react and form new compounds called products
There are several forms of reactions that can occur, including single replacement, double replacement, synthesis, decomposition, etc.
A. 2C2H6 + 702 ⇒ 4CO2 + 6H20
Combustion : reaction of Hydrocarbon and Oxygen
B. AgNO3 + LiCl → AgCl + LINO3
Double replacement : there is an ion exchange between two ion compounds in the reactant to form two new ion compounds in the product
C. Ca + MgS → CaS + Mg
Single replacement :one element replaces the other elements of a compound to produce new elements and compounds
D. 2H20⇒ 2H2 + O2
Decomposition : One compound breaks down into 2 components
You could use another word for change can be variable witch means change and if you times the one two more times then you would get four because two time two would be four and times the one would be four.
