A chemist sets up a chemical reaction but finds that none of the reactant molecules have the required activation energy. What is the result

No reaction is observed

Explanation:

The activation energy is the minimum energy that reactants must have in order to cross the energy barrier and become converted into products.

When reactant molecules do not possess the required activation energy, collision between the reactant molecules becomes purely elastic and no reaction occurs.

Hence, colliding reactant molecules are only converted into product molecules when they possess the required activation energy.

1. for the first question, we must find the mass of the anhydrous salt, mgso₄. the molar mass for mgso₄·7h₂o is 246.47 g/mol, while that of mgso₄ is 120.37 g/mol.7.834 g mgso₄·7h₂o * 1 mol mgso₄·7h₂o/246.47 g * 1 mol mgso₄/1 mol mgso₄·7h₂o * 20.37 g mgso₄/mol = 0.647 g mgso₄

2. mass of water = mass of sample - mass of anhydrous salemass of water = 7.834 - 0.647 = 7.19 gpercent water in hydrate = 7.19/7.834 * 100 = 91.74%

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