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slava [35]
3 years ago
11

Which option describes the behavior of energy in exothermic reactions?

Chemistry
2 answers:
jok3333 [9.3K]3 years ago
6 0

Answer:

The energy of the products is less than the energy of the reactants, so energy is released into the surrounding environment.

4vir4ik [10]3 years ago
5 0

Answer:

The correct answer is The energy of the products is less than the energy of the reactants, so energy is released into the surrounding environment.

Explanation:

In exothermic reactions, there is a release of energy in the environment which comes out converted into heat. These types of reactions are the <u>product of a process of transformation of molecules called chemical reaction.</u>

The energy that an exothermic reaction uses to carry out is less than the amount of energy it releases, so as the answer says: This energy is released because the energy of the products is less than the energy of the reactants.

An exothermic change can be for example the processes of condensation and solidification.

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Pb(OH)Cl, one of the lead compounds used in ancient Egyptian cosmetics, was prepared from PbO according to the following recipe:
sladkih [1.3K]

Answer:

8.59 g

2.25 g

Explanation:

According to the given situation the calculation of grams of PbO and grams of NaCL is shown below:-

Moles of Pb(OH)CL is

= \frac{Mass}{Molar\ mass}

= \frac{10.0 g}{259.65g / mol}

= 0.0385 mol

Mass of PbO needed is

= 0.385mol Pb(OH) Cl\times \frac{1 mol PbO}{1molpb (OH) cl} \times \frac{223.2g PbO}{1mol PbO}

After solving the above equation we will get

= 8.59 g

Mass of NaCL needed is

= \frac{1mol\ NaCl}{1molPb\ (OH)Cl} \times \frac{58.45NaCl}{1mol NaCl}

After solving the above equation we will get

= 2.25 g

Therefore we have applied the above formula.

7 0
2 years ago
What is the cause of acid precipitation?
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Answer:

nitrogenous oxides

Explanation:

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Explanation:

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