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3 years ago

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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Name any two artificial elements.

romanna [79]

Answer:

1) Hydrogen and Helium

I hope it will help you

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2 years ago

Read 2 more answers

Since density depends on the mass and volume of an object, we need both of these values combined in the correct way to solve for

alukav5142 [94]

Answer:

7.86 g/cm³

Explanation:

11.0 kg = 11,000 g

The density in g/cm³ is ...

(11,000 g)/(1,400 cm³) = 7.86 g/cm³

7 0

3 years ago

10.

Andru [333]

Answer: 1.8 moles Fe and 2.7 moles $CO_2$ are produced.

Explanation:

The balanced chemical reaction is:

$Fe_2O_3+3CO\rightarrow 2Fe+3CO_2$

According to stoichiometry :

3 moles of $CO$ require 1 mole of $Fe_2O_3$

Thus 2.7 moles of $CO$ will require= $\frac{1}{3}\times 2.7=0.9moles$ of $Fe_2O_3$

Thus $CO$ is the limiting reagent as it limits the formation of product and $Fe_2O_3$ is the excess reagent.

As 3 moles of $CO$ give = 2 moles of $Fe$ and 3 moles of $CO_2$

Thus 2.7 moles of $CO$ will give = $\frac{2}{3}\times 2.7=1.8moles$ of $Fe$ and $\frac{3}{3}\times 2.7=2.7moles$ of $CO_2$

Thus 1.8 moles Fe and 2.7 moles $CO_2$ are produced.

7 0

2 years ago

How many miles of H2O are produced when 0.322 mol of octane is burned?

victus00 [196]

Answer:

alot of h2o

Explanation:

8 0

2 years ago

What is the maximum amount of HCl, in grams, that can be produced if 37.5 g of BCl3 and 60.0 g of H2O are reacted according to t

Rus_ich [418]

Ooooh boy alright. So, this may or may not be a limited reactant problem so we need to first find out of it is.

First, how many moles of each substance are there

the molar mass of BCl3 is <span>117.17 grams so 37.5 g / 117.17 is ~ .32 mol.
The molar mass of H2O is 18.02 so 60 / 18.02 is ~ 3.33 mol.

Now, for every 1 mole of BCl3, there are 3 moles of HCl created. Therefore, BCl3 can create ~ .96 moles.
For every 3 moles of H2O, there are 3 moles of HCl created. Therefore, HCl can create ~3.33 moles.

But, there is not enough BCl3 to support that 3.33 moles, only enough for .96 moles, therefore BCl3 is the limiting reactant. Now, to answer the question, simply multiply .96 moles by the molar mass of HCl.

.96 x 36.46 = ~35 g</span>

6 0

3 years ago