Question 2 A.
Hydrogen peroxide (H2O2), decomposes to form water and oxygen. The balanced chemical
equation for this reaction is shown below.
H2O2 (aq)
H20 ( + O2(g)
AH = - 189 kJ
EA = 75 kJ.
Use the information to complete the energy diagram for the decomposition of hydrogen
peroxide where x is the maximum energy and y is the minimum energy.
On the set of axes provided, complete the energy diagram and clearly label the activation
energy (EA) of the reaction and the change in heat of the reaction (AH).
(3marks)
Loney
de
24,020
200
y
Reaction Procending
What is the value of y in the energy diagram ?
(2marks)

The last few miles of the marathon are the most difficult for heather, her hair plastered to her head, sweat clinging to her arms, and her legs already feeling as if they had nothing left, just dead weight. after grabbing a cup of ice water, she feels the ice cubes smash against her nose as she gulps some cool refreshment and keeps on running. in these last few miles, the breeze kicks up and she finally feels some coolness against her skin. drips of sweat, once clinging to her forehead, now spill down, and heather feels more pain as the sweat flows into her eyes.which of the following is the most likely reason why the ice struck heather’s nose when she took a drink? a) water can function as a solvent. b) water can store large amounts of heat. c) water can moderate temperatures through evaporative cooling. d) the density of water decreases when it freezes. e) water has a cohesive nature.sweat remained on heather’s forehead and arms because of the a) high salt content of sweat b) cohesive nature of water c) ability of water to moderate heat d) high evaporative cooling effect of water e) ability of water to act as a solvent

Will mark brainliest how many electrons can be held in the energy level n = 4?

The famous scientist galileo galilei did several experiments with sloping planes, which he rolled metal balls down so that he could study motion. by changing the slope, he could study how the speed at which the ball rolled was affected. what was the independent variable in galileo's experiment? a. the speed of the ball b. the slope of the plane c. whether the ball moved d. what the ball was made of