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Mumz [18]
3 years ago
12

Someone please help i don’t have much time left

Chemistry
1 answer:
REY [17]3 years ago
6 0

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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Which line represents a stationary object.
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The green one cause its staying in the same position even when time is passing. - hope this helped have a great day

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if 10 moles of A and 7.5 moles of B are taken in a flask, identify the value of moles of A4B3 produced in a reaction.​
natta225 [31]

The number of moles of A4B3 produced in a reaction is obtained  by stoichiometry.

The term stoichiometry refers to mass-mole relationship. The first step in solving this problem is by writing the correct reaction equation as follows;

4A + 3B -------> A4B3

If 4 moles of A yields 1 mole of A4B3

10 moles of A yields 10 * 1/4 = 2.5 moles of A4B3

Therefore, 2.5 moles of A4B3  is produced.

Learn more: brainly.com/question/9743981

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2 years ago
1. How are ionic compounds named?
ella [17]
Ionic compounds are neutral compounds made up of positively charged ions called cations and negatively charged ions called anions. For binary ionic compounds (ionic compounds that contain only two types of elements), the compounds are named by writing the name of the cation first followed by the name of the anion.
7 0
3 years ago
The radioactive element​ carbon-14 has a​ half-life of 5750 years. a scientist determined that the bones from a mastodon had los
Monica [59]
Radioactive elements obey 1st order  kinetics,

For 1st order reaction, relation between rate constant (k) and half life [t(1/2)] is,
k = \frac{0.693}{t(1/2)} =  \frac{0.693}{5750} = 1.205 X 10^-^4 hr^-^1

Also, for 1st order reaction, we have
t = \frac{2.303}{k} log  \frac{\text{initial conc.}}{\text{final conc.}}
 
Given that: <span>the bones from a mastodon had lost 78.5​% of their​ C14,
</span>∴ initial conc. of C14 = 100%, conc. of C14 left after time 't' = 21.5%

∴t = \frac{2.303}{1.205 X 10^(-4)} log \frac{\text{100}}{\text{21.5}} = 1.2758 X 10^4 hours
5 0
3 years ago
Predict the effect of removing chloride ions Now remove some of the free chloride ions by adding some silver nitrate (Hint: add
mixer [17]

The addition of silver nitrate will favor the forward reaction which is the precipitation of AgCl.

The addition of HCl will favor the formation of free chloride ions.

The given reaction is exothermic.

<h3>What is the effect in equilibrium when free chloride ions are removed from the precipitation reaction of silver chloride?</h3>

A precipitation reaction is a reaction in which an insoluble compound is obtained when two solutions of salt are mixed together.

In the given precipitation reaction, the equilibrium equation is given as follows:

AgNO₃ (aq)  ⇄ Ag⁺ (aq) + NO₃⁻ (aq)

Ag⁺ (aq) + Cl⁻ (aq) ⇄ AgCl

AgNO₃ (aq) + Cl⁻ (aq) ⇄ AgCl (s) + NO₃⁻ (aq)

From the equation above, the removal of the free chloride ions will favor the formation of the product, silver chloride, AgCl, and the dissociation of more AgNO₃ (aq).

The reaction is an endothermic reaction.

Now when HCl is added to the reaction, there are more the reaction will favor the dissociation of HCl to form free chloride ions as seen in the equation below:

HCl (aq) ⇄ H⁺ (aq) + Cl⁻ (aq)

The reaction is an exothermic reaction.

Learn more about endothermic and exothermic reactions at: brainly.com/question/6357350

#SPJ1

7 0
10 months ago
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