Please help me!! Look at the picture to understand the question please!

Which of these red outlined elements is most similar to Chlorine (CL)?

A. He
B. I
C. AI

i think it would be neutral

Answer:

Explanation:

The density of a substance can be found by using the formula

[tex]density = \frac{mass}{volume} \\[/tex]

From the question

mass = 4.85 kg

volume = 280 cm³

We have

[tex]density = \frac{4.85}{280} \\ = 0.01732...[/tex]

We have the final answer as

Hope this helps you

We have that

the Carbon isotopes represents a pair of isotopes

Option B

From the question we are told

Which of the following represents a pair of isotopes?

Generally

Isotopes

This is defined as variant forms of an element with variant atomic mass but same proton number

Therefore

the Carbon isotopes represents a pair of isotopes

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Answer:Electric

Explanation: Its right.

Chemical energy results from the burning of wood or gasoline. Therefore, option (C) is correct.

Chemical energy is described as the energy which is stored in the chemical bonds formed in the chemical compounds. It is liberated during the chemical reaction and produces heat as a side-product which is known as an exothermic reaction.

Examples of chemical energy are biomass, natural gas, batteries, petroleum, and coal. When chemical energy is released from a compound, it is transformed into a completely new substance.

While burning wood or fuel, the chemical energy in the wood or gasoline is liberated as heat because of the chemical reaction of oxygen in the air and wood. This kind of chemical reaction is known as a combustion reaction. Combustion reaction converts the chemical energy stored in the wood into light energy and heat.

Therefore, in the burning of wood or gasoline, chemical energy is emitted.

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Answer:

Plankton will never get the kraby patty secret formula

Explanation:

Answer:

Newton's Second Law

Explanation:

Newton's second law of motion states that the acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object.

(I'm going to assume this is an option, but please let me know if it's not!)

Answer:

B) Ca(H2PO4)2

Explanation:

To solve this we must be knowing each and every concept related to chemical formula.  Therefore, the correct option is option B among all the given options.

The chemical formula is indeed a means of expressing information about just the chemical proportion of atoms that comprise a certain chemical compound as well as molecule through the use of chemical element numbers and symbols.

Furthermore, the molecular formula does not contain any words and does not serve as a chemical name. However, it just indicates basic chemical structures and is not the same as the entire chemical structural formula.  The correct formula for calcium dihydrogen phosphate is Ca(H[tex]_2[/tex]PO[tex]_4[/tex])[tex]_2[/tex].

Therefore, the correct option is option B among all the given options.

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Answer:

Explanation:

The second best answer is its group on the periodic table.

That answer depends on the actual reason. The number of protons determines which element you are talking about.

Answer:

3.6 gallons are equal to 56 cups

Answer: You can use Boyle's law, which states that pressure is inversely related to volume when other variables are held constant. If the final pressure of a gas is half of the initial, the volume must double if temperature is to remain the same.

Explanation:

Answer:

890 has 2 significant figures

Explanation:

Each atom/element has an electron configuration

The electron configuration shows the energy level of the electron

Each electron configuration has 4 quantum numbers, namely n, l, ml, and ms

We make an example of the element Mg which is in group 2 with the atomic number 12

Electron configuration of Mg: [Ne] 3s² or 1s² 2s² 2p⁶ 3s²

if Mg removes 2 electrons then Mg will form a positive ion (cation) Mg²⁺

This cation is included in the monatomic ion because it is formed from one element (in contrast to the polyatomic ion, which is formed from two or more elements such as SO₄²⁻, ClO₃⁻)

Electron configuration of Mg²⁺ : 1s² 2s² 2p⁶

So atoms can be positively or negatively charged depending on removing or attracting electrons

Answer:

D)

Explanation:

It is the most realistic

Answer:

The part of the scientific method that involves making an educated guess is the "hypothesis".

Explanation:

Answer:

No.

Explanation:

If the forces are acting on opposite direction, they will cancel out each other. As a result, the object will not move. This type of force is called balanced force. In this type of force the net force acting on an object is equal to 0. Hence, if two groups in the game are exerting equal and opposite force, the rope will not move.

Answer:  

The best explanation for both the first and second claims is that aluminum is a pure substance: Aluminum is one form of atom and its structure is always the same.  Aluminum has an evenly blended composition.

Explanation:

Aluminum is one type of atom and its composition is always the same, this statement also gives the property of a pure substance . In fact, pure substances are often homogeneous and contain only one form of atom or molecule.

One of a pure substance's key characteristics is that it has a uniform composition that is homologous in nature, and can be mixed uniformly throughout. ALUMINUM's second statement notes the property of a pure substance. Aluminum is also homologous in terms of occurrence.

The atoms are very small and have a diameter of around 1 x 10-10 meters. It's difficult to view them using a light microscope due to their limited size. Although it may not be possible to view an atom using a light microscope, a number of techniques have been developed, such as electron microscopy, to observe and research the structure of atoms. Therefore, the statement that the aluminum atom can not be seen through a microscope does not explain the pure content of aluminum.

This argument - 'Aluminum contains substances which are not bound together' does not explain the fact that it is a pure material as it notes that the property of a pure material does not exist in relation to its chemical bonds.

.Therefore, the first and second aluminum statements give the best description of a pure material.

Answer:

im sorry i think i know the answer but i dont want you to get it wrong

Explanation:

Answer:its C

Explanation:

bc were learning bout rn n we lagit just went over this

Answer:

C

Explanation:

I just took the test

Answer: They will incorporate the suggestions from their peers and resubmit the paper.

Explanation:E 2022

Answer:

Matter

hope this helps

Answer:

matter

Explanation:

Did the test

Answer:

20 drops

Explanation:

Answer:

27°C

Explanation:

q = 1500 J

m = 50g

c = 4.18 J/g°C

q = m·c·ΔT

ΔT = [tex]\frac{1500J}{50g*4.18\frac{J}{gC} } = 7C[/tex]

ΔT = final temperature - initial temperature

Final temp = 20 + 7 = 27°C

im just answering questions to get points Explanation:

i dont know what points do

Answer:

Hello I passed my Chemistry exam (Acellus) in the beginning of June:)

Explanation:

Answer:

liquid, solid, gas

Explanation:

Solid, Liquid and gaseous

There are 5 states of matter

1.) Solid

2.) Liquid

3.) Gaseous

4.) Plasma

5.) Bose Einstein

the First three are main

Answer:

Section 2 on the diagram (Option B)

Explanation:

These metals can be shiny, ductile, malleable, and are good conductors of heat and electricity.

Answer:

it is because they are placed geographically different.