Third choice because the others make no sense
Answer:
H2SO4 (sulphuric acid) is considered a strong acid because it's H+ ions completely dissociates or ionizes in a water. When reacted with phenolphthalein is colourless because phenolphthalein doesn't react with acids, only strong bases and when reacted with methyl orange, it changes from orange to red.
Explanation:
Hello!
In an endothermic reaction, The potential energy of the products is greater than the potential energy of the reactants.
Any chemical reaction that absorbs energy is called an Endothermic Reaction. In this reactions, the reactants absorb energy from the surroundings to carry out the reaction. As a result, the products have a higher potential energy than the reactants. Photosynthesis is an example of an Endothermic Reaction, as the plant uses energy from the sun to generate the products.
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Mass and Volume!
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