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masya89 [10]
3 years ago
15

I don’t get this lesson so can somebody help me with the answer plz

Chemistry
1 answer:
lyudmila [28]3 years ago
7 0
Texture is physical
ability to react with other substances is chemical
hardness is physical
tarnish is chemical
temperatures chemical
electrical conductivity is physical
ferment is physical
mass is physical
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REY [17]

Answer: Energy of reactants = 30, Energy of products = 10

Exothermic

Activation energy for forward reaction is 10.

Explanation:

Exothermic reactions are defined as the reactions in which energy of the product is lesser than the energy of the reactants. The total energy is released in the form of heat and \Delta H for the reaction comes out to be negative.

Energy of reactants = 30

Energy of products = 10

Thus as energy of the product < energy of the reactant, the reaction is exothermic.

Activation energy (E_a) is the extra energy that must be supplied to reactants in order to cross the energy barrier and thus convert to products.

E_a for forward reaction is (40-30) = 10.

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Chlorophyll a is one of the green pigments found in plants. Chlorophyll a has the molecular formula C55H72MgN4O5. How many atoms
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