Help me pls I will mark you as brain

Answer: D

Explanation:

O=C=O

Carbon is in group 14 having four valence electrons and oxygen is in group 16 having six valence electrons hence the correct structure of CO2 is O=C=O.

Carbon and oxygen are nonmetals. Nonmetals form compounds by sharing electrons in a covalent bond.Carbon, a group 14 element has four valence electrons while oxygen, a group 16 element has six valence electrons.

Carbon  can share four valence electrons with two oxygen atoms in CO2 to form the structure O=C=O. In this way, all the atoms now obey the octet rule.

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The titration using permanganate in acidic solution because it can be act as behave indicator.

Titration is a typical quantitative chemical analysis procedure used in laboratories to quantify the concentration of a specified analyte. The titrant or titrator is a substance that is manufactured as a standard solution with a given concentration as well as volume.

Permanganate titrations must be performed in a strong acid solution. Because [tex]HNO_{3}[/tex] and HCl might involve in competing for a redox reaction, lowering the accuracy of the titration, sulfuric acid is commonly utilized. Titration permits food manufacturers to calculate the amount of a reactant present in a sample.

To know more about titration.

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Answer:

D

Explanation:

Valence electrons are the electrons in the highest occupied principal energy level of an atom.

Answer:    q = 64 kJ

Explanation:

As you know, a substance's specific heat tells you how much heat is required to increase the temperature of  

1 g

of that sample by  

1

∘

C

.

In water's case, you know that its specific heat is equal to  

4.18

J

g

∘

C

. This tells you that in order to increase the temperature of  

1 g

of water by  

1

∘

C

, you need to supply  

4.18 J

of heat.

How much heat would you need to increase the temperature of  

200 g

of water by  

1

∘

C

?

Well, if you need  

4.18 J

per gram to increase its temperature by  

1

∘

C

, it follows that you will need  

200

times more heat to get this done.

Likewise, if you were to increase the temperature of  

1 g

of water by  

76

∘

C

, you'd need  

76

times more heat than when increasing the temperature of  

1 g

by  

1

∘

C

.

Combine these two requirements and you get the total amount of heat required to increase the temperature of  

200 g

of water by  

76

∘

C

.

Mathematically, this is expressed using the following equation

q

=

m

⋅

c

⋅

Δ

T

, where

q

- heat absorbed/lost

m

- the mass of the sample

c

- the specific heat of the substance

Δ

T

- the change in temperature, defined as final temperature minus initial temperature

Plug in your values to get

q

=

200

g

⋅

4.18

J

g

∘

C

⋅

(

100

−

24

)

∘

C

q

=

63536 J

I'll leave the answer rounded to two sig figs and expressed in kilojoules

q

=

64 kJ

equation: Iron + Sulfuric acid → Iron (II) sulfate + hydrogen gas

Type of Chemical Reaction: For this reaction we have a single displacement reaction.

Note that this is the chemical reaction that takes place when diluted Sulfuric acid reacts with iron. If you have concentrated Sulfuric acid you will have a different equation.

Answer:

by evaporating the solution leaving the solute (salt) behind after the solvent has evaporated

Answer:

Comparison of whole genome sequences provides a highly detailed view of how organisms are related to each other at the genetic level.

Explanation:

Answer:

In physics, the kinetic energy of an object is the energy that it possesses due to its motion. It is defined as the work needed to accelerate a body of a given mass from rest to its stated velocity. Having gained this energy during its acceleration, the body maintains this kinetic energy unless its speed changes. The same amount of work is done by the body when decelerating from its current speed to a state of rest.

In classical mechanics, the kinetic energy of a non-rotating object of mass m traveling at a speed v is 1/2*mv^2. In relativistic mechanics, this is a good approximation only when v is much less than the speed of light.

The standard unit of kinetic energy is the joule, while the English unit of kinetic energy is the foot-pound.

Explanation:

Don't directly copy and paste this because you will get flagged for plagiarism. Just type this out in your own words and change a few of the words to their synonyms.

the only report that will fool the teachers

Answer:

it will help you , but I am not sure it is correct

Explanation:

a) blue litmus paper turns red when u add acid in it .

b) red litmus paper , when an alkali dissolves in water it produce hydroxide ions

which cause it to become a alkaline

Answer:

D, radiation

Explanation:

the sun's heat radiates onto the land, oceans, and surrounding atmosphere, warming them

Color is an example of an intensive physical property. Details about intensive physical property can be found below.

Intensive properties are physical properties that does not depend on the mass of the substance or system.

Another property of substances is the extensive property, which is the property that is dependent on the quantity of the substance.

Examples of intensive physical properties are as follows:

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Answer:

Today, the atom is defined as the smallest particle that can be considered an element.

Explanation:

Answer:

Today,the atom is defined as the smallest particle that can still be considered an element.

that will be the Boston tea party

Explanation: C) the Boston tea party

I did the quiz

# of neutrons = mass number - atomic number

                      = 17 - 8

                      = 9

The two factors which must be held constant for density to be a constant ratio are: Mass and Volume

As we know, the density of a material is simply defined as the ratio of mass to volume.

Consequently, To obtain a constant ratio for density, the mass and volume of the material in discuss must be kept constant.

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Answer:

70

Explanation:

The atomic number stands for the number of protons.

mass number stands for number of neutrons and protons.

30 neutrons + 40 protons = mass number of 70

Hope this helps!

Answer: I am sorry i couldnt answer but this question is beyond me

Explanation:

Answer:because the chemical formula is vital to the equation it tells you what creates the chemical and whats in it you can change the exponents but not the formula itself

Explanation:

Answer:

The answer is

D)

radiant, electrical, mechanical

Explanation:

Answer:

Beryllium Fluoride (BeF2) is an ionic compound

Answer:

Transition Metal

Explanation:

Hey there is a really easy tool called PTable that is an interactive periodic table that does all kind of things. needed in Chem

Answer:

two oxygen atoms on the left side of the arrow

Answer:

Answer A:

a new disease develops , so having more genetic variation among there off spring is an advantage.

Not 100% sure but A seems the most likely answer.

Explanation:

The question is asking where sexual reproduction is more of an advantage and I'd say that having more genetic variation would be caused by sexual reproduction and not as much or at all in asexual reproduction.

with B, C, and D. It wouldn't really be an advantage to do one or the other in this context.

According to law of conservation of mass.

In a chemical reaction Mass is neither created nor destroyed.

#1

Mass of water

[tex]\\ \sf\longmapsto 30+120=150g[/tex]

#2

Mass of sulphur:-

[tex]\\ \sf\longmapsto 136.9-111.6=25.3g[/tex]

Answer:

Atomic number (smaller number) =number of protons or number of electrons

mass number ( larger number) =number of protons plus the number of neutrons

Explanation:

just a few days ago and I have a

Answer:

I am also beginners I don't know I am only completing this answer and sorry!!!!!!

Answer:

Solar Energy and Chemical energy

Explanation: