What inference can be drawn from the graph? ABCD
45
40
35
90
25
Concentration
20
Sis
10
5
0
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
The seconds)
ОА The reaction between A and is reactant favored.
On
The amount of product is greater than the amount of reactant
Oc The reaction uses all its reactants to form products.
D The reaction reaches equilibrium at 15 seconds.
ОЕ The amount of reactants is highest at equilibrium

air quality

poor drinking water

and heavy polution

can lead to poor health

the enthalpy of formation of water is given as -285.8kj/mol, which states that the enthalpy of formation is negative.

negative enthalpy of formation indicates that the heat is released during the reaction process. the heat is released from reaction to the surroundings the enthalpy is expressed with a negative sign with the energy given out in the reaction process.

the formation of water takes place by giving out heat which is -285.8 kj/mol.

there are two significant figures.