Question

PLZ HELP NOW!!!!!!!!!!!!!!WORTH HALF MY GRADE!!!!!!!!!

Which of these accurately describes a chemical reaction?

Question 1 options:

Products and reactants combine to form new substances.


Products and reactants combine to form new reactants.


Products combine to form reactants.


Reactants combine to form products.

Question 2 (1 point)
If an increase in temperature accompanies a reaction, what occurred?

Question 2 options:

Energy was destroyed.


Energy was released.


Energy was created.


Energy was absorbed.

Question 3 (1 point)
If a decrease in temperature accompanies a reaction, what occurred?

Question 3 options:

Energy was destroyed.


Energy was absorbed.


Energy was created.


Energy was released.

Question 4 (1 point)
This is a model of a Chlorine atom. How likely is it that this atom would want to bond with another atom?

Chlorine atom

Question 4 options:

This atom is not likely at all to bond with another atom.


This atom is very likely to bond with another atom.


This atom is only slightly likely to bond with another atom.

Question 5 (1 point)
What can affect the properties of a substance?

Question 5 options:

only the arrangement of atoms


neither the arrangement nor the types of atoms


the arrangement and types of atoms


only the types of atoms

Question 6 (1 point)
This is a model of a Neon atom. How likely is it that this atom would want to bond with another atom?

Neon atom

Question 6 options:

This atom is only slightly likely to bond with another atom


This atom is not likely at all to bond with another atom.


This atom is very likely to bond with another atom.

Question 7 (1 point)
Which of these is an indication that a chemical reaction has occurred?

Question 7 options:

melting of a substance


freezing of a substance


formation of a gas


boiling of a substance

Question 8 (1 point)
Which of these describes an exothermic reaction?

Question 8 options:

Energy is created in the reaction.


No energy is transferred by the reaction.


Energy is released by the reaction.


Energy is absorbed by the reaction.

Question 9 (1 point)
View the diagram below.

Image result for reactant product blank

Describe what happened in the diagram.

Question 9 options:

The molecules on both sides of the chemical reaction are the same, because they are both mixtures.


Bonds were broken on the reactants and no new bonds were formed on the products.


Bonds were broken on the reactants and new bonds were formed on the products.


The molecules expanded and cooled.

Question 10 (1 point)
View the Argon atom below:



Is an Argon atom likely to form a bond? Why or why not?



Question 10 options:

The atom is likely to bond with another atom, as it has a full outer shell of valence electrons.


The atom is not likely to bond with another atom, as it has a full outer shell of valence electrons.


The atom is not likely to bond with another atom, because it does not have a full outer shell.


The atom is likely to bond with another atom, because it does not have a full outer shell.

Question 11 (1 point)
Bethany had a beaker with a small amount of baking soda. She added a few drops of pickle juice to the baking soda and observed fizzing and bubbling. Based on her observation, which of these can Bethany determine about the new substance formed by mixing the baking soda and pickle juice?

Question 11 options:

No chemical reaction took place.


A chemical reaction produced a gas.


A chemical reaction produced a solid.


Only a physical change happened.

Question 12 (1 point)
In the graph below, 2K + S forms new bonds to form K2S. The energy in the course of the reaction can be shown in the graph below:



If a new bond was formed, which of the following can be inferred?

Question 12 options:

Not enough information is given to know if energy was absorbed or released.


Energy was neither absorbed nor released during the reaction.


Energy was released during the reaction.


Energy was absorbed during the reaction.


THE PICTURES ARE IN ORDER:

Number 4 is the first picture

Number 6 is the second picture

Number 9 is the third picture

Number 10 is the fourth picture

Number 12 is the fifth picture

They have number to the questions they were asked from :),Plz help me,First person to answer the correct answers will be awarded BRAINLYEST

Its worth half my grade plus it's in the record book......Ok BYE!!!!:)

Answer 1

Answer 1:

Products and reactants combine to form new substances.

Explanation:

In a chemical reaction, substances called reactants are changed into other substances called products. We can't change one element into another in a chemical reaction, just the chemical properties of the new substance are changed.

Answer 2:

Energy was released.

Explanation:

An increase in heat increase in the vibrational energy of the atoms, or molecules of a substance. So increasing the temperature and hence the heat, there is more movement (vibration) in the atoms which translates to more kinetic energy and energy is released.

Answer 3:

Energy was absorbed.

Explanation:

When the temperature during a chemical reaction is decreased, the kinetic energy of the molecules decreases and therefore energy is absorbed which means more energy is required to break the inter molecular bonds among the atoms.

Answer 4:

This atom is very likely to bond with another atom.

Explanation:

According to the Octet Rule, every atom wants to complete its outermost shell with 8 electrons. Since Cl atom has 7 electrons in its last shell so it is obviously  it an unstable state and it will form bond with group 1st elements such as Na that is why we see that NaCl is a very stable substance.

Answer 5:

The arrangement and types of atoms

Explanation:

Actually the chemical properties of a substance are related to the arrangement of atoms in an element but the physical properties of elements are related to the types of atoms.

Answer 6:

This atom is not likely at all to bond with another atom.

Explanation:

Neon is an inert gas or Nobel Gas and noble gases are those gases whose outermost shell is complete therefore they do not want to react with other elements because they are already in stable form.

Answer 7:

Formation of a gas

Explanation:

The chemical reaction depends upon the change in chemical properties of element and not the physical properties only. Boiling, freezing and melting are the physical changes of a substance but the formation of a gas shows that a new gas is formed by the reaction of two or more than two substances.

Answer 8:

Energy is released by the reaction.

Explanation:

An exothermic reaction is a chemical reaction that releases energy by light or heat. It is the opposite of an endothermic reaction which is the absorption of energy. Exothermic reaction can be expressed in a chemical equation as:

reactants → products + energy

Answer 9:

Bonds were broken on the reactants and new bonds were formed on the products.

Explanation:

We can see that there are two types of elements: Red and Black. On the reactants side we see that there are bonds between similar atoms but on the right hand side they are mixed i.e red mixed with black so it means that new bonds were formed.

Answer 10:

The atom is not likely to bond with another atom, as it has a full outer shell of valence electrons.

Explanation:

Argon is an inert gas and inert gases are those gases which do not react with other elements and the reason behind this is that they have already got their outermost shell completed.

Answer 11:

A chemical reaction produced a gas.

Explanation:

Pickle juice has vinegar inside it and vinegar is acetic acid so the first reaction is the acid-base reaction. When vinegar and baking soda are first mixed together, hydrogen ions in the vinegar react with the sodium and bicarbonate ions in the baking soda. The carbonic acid formed as a result of the first reaction immediately begins to decompose into water and carbon dioxide gas.

Answer 12:

Energy was released during the reaction.

Explanation:

Energy was released during the reaction  because the slope is going down and is in the negative direction with the passage of time.