How will an energy diagram look for an exothermic reaction?The reactants and products will be at the same potential energy.

The reactants are at a higher potential energy compared to the products.

The reactants are at a lower potential energy compared to the products.

There will not be an activation energy barrier.

Answers

Answer 1

Answer:

Answer : The correct option is, The reactants are at a higher potential energy compared to the products.

Explanation :

Exothermic reaction means energy is released and the overall enthalpy change is negative.

In exothermic reaction, the reactants are at a higher potential energy compared to the products. In other words, we can say that the products are more stable than the reactants.

Answer 2

Answer: B.) The reactants are at a higher potential energy compared to the products.

My reason being is because the reactants tend to gather "hyper" energy which is also known as potential energy and this will occur as shown in the answer as an Exothermic Reaction.

I really hope that this helps you out a lot. Have a nice day :)

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Over-encouraging lesser skilled players can lead to embarrassment.
a. True
b. False

Answers

Answer: Option (a) is correct.

Explanation:

A person with less skills needs to work more or practice more on his abilities in order to improve their athletic ability to build a stronger team.

Over encouragement to lesser skilled person can lead to the development of over confidence. As after over encouragement, the less skilled person can have the illusion of knowing each and everything which is not true for anyone.

As no one is perfect, therefore, over-encouraging lesser skilled players can lead to embarrassment.

My answer would be a. True

If you knew the number of valence electrons in a nonmetal atom, how would you determine the valence of the element?

Answers

Usually, the group number of the element would tell you the amount of valence electrons. In an element, their needs to be a full octet in order for it to be stable (aka happy element). Octet means 8 valence electrons in its orbital.

How can you tell when a solution is formed?

Answers

You may tell when a solution os formed when the item or particle, such as sugar or salt,
dissolves completely in the solvent, such as water.

Basically, you know when a solution is formed when the material you have placed in the solvent disappears :P

When the solute is completely dissolved into the solvent.

4 Compared to the energy and charge of the electrons in the first shell of a Be atom, the electrons in the second shell of this atom have(1) less energy and the same charge
(2) less energy and a different charge
(3) more energy and the same charge
(4) more energy and a different charge

Answers

Moving the electron away from the nucleus requires energy, so the electrons in the outer shell will have more energy than ones in the inner shell. Electrons always have a charge of -1, so the charge in the inner and outer shell will be the same. Therefore the answer is 3

The electrons in the second shell of this atom have (3) more energy and the same charge compared to the first shell

Further explanation

Bohr's atomic model has shown the energy levels of electrons in the path of the atomic shell

The greater the value of n (the atomic shell, the main quantum number), the greater the energy level

In normal circumstances, electrons fill the shell at the lowest energy level starting from the shell K, L M and then N

When an atom gets energy from outside, the electrons will absorb energy so it moves to higher energy. This situation is called excited

Electrons will return to the original path or a lower energy level because the excited state is unstable. In this condition, the electron will release energy

The electron energy at the nth path can be formulated:

$\rm En=(-Rh)/(n^2)$

Rh = constant 2.179.10⁻¹⁸ J

So the electron transfer energy (ΔE)

ΔE = E end - E initial

From the electron transfer available, because the value of the Rh constant is the same, the effect is the value of n (shell) ⇒ 1 / n²

Electron configuration of Be (Beryllium) with atomic number 4

1s² 2s² or [He] 2s²

So in the first shell E = -1(n=1), the second shell E = -1/4(n=2)

So the energy value in the second shell is greater than the first shell

While the electron charge is still the same(-1) (such as protons with + charges and neutrons with neutral charges / 0)

Learn more

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A chunk of silver has a heat capacity if 42.8 j/*c. If the silver has a mass of 181g, calculate the specific heat of sliver.

Answers

From the given question, we know
Heat capacity of the chunk of silver = 42.8 J/c
Mass of the silver = 181 g
Now we also know the formula for determining the specific heat of silver and that is
Specific heat (C) = heat capacity/ mass
= (42.8/181) J/gC
= 0.24 J/gC
So the specific heat of the silver is 0.24 J/gC.
With the given known facts, it is easily possible to find out the specific gravity of any substance.

You are throwing an object with a force of 140 N. The object accelerates 19.0 m/s/s. What is the mass of the object?

Answers

Answer:

7.4

Explanation:

F = m × a

F/a = m

m = 140 / 19

m = 7.4

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