I need help pleaseee!!!!!!!! Fast

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:

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

Explanation:

Answer:

Well, it´s dangerous because it displaces oxygen in the blood and deprives the heart, the brain and other vital organs.

Explanation:

What i mean by that is that breathing carbon monoxide reduces the amount of oxygen that can be transported in the blood stream to critical organs like the heart and brain. It can also causes E.g. dizziness, confusion, unconsciousness and even death.

I hope this answered yor question, if i did misundertood the question do tell me and i will try my best to explain it. Have a nice day!! :)

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

Answer:

D

Explanation:

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

Answer:

Beryllium Fluoride (BeF2) is an ionic compound

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:

two oxygen atoms on the left side of the arrow

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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Answer:

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

Answer:

Alloys are often stronger and less active than pure metals. Alloys have higher melting point than pure metals.

A hypothesis that could prove or disprove Janna’s claim is; bottle water is pure water hence it boils at 100°C.

Pure water is water that contains only hydrogen and oxygen and nothing else. Impure water contains other substances apart from hydrogen and oxygen in a ratio of 2:1.

The hypothesis of our experiment is that;" bottle water is pure water hence it boils at 100°C." A hypothesis is a tentative explanation for an observation.

We can carry out the experiment by bringing about three samples of the bottled water and insert a thermometer in each of the samples then record the initial temperature of the water. The samples are then heated to boiling point and the boiling point of each sample is recorded.

If the sample boil at exactly 100°C then the hypothesis is proven or vice versa.

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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.

https://brainly.com/question/2728613.

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Explanation:

just a few days ago and I have a

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:

Learn more about intensive property at: https://brainly.com/question/13733851

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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

Arranging the pairs from strongest to weakest attraction :

Covalent bonds are the strongest bonds because it involves the sharing of electrons between two binding atoms therefore the atoms are not dissociated easily. Also covalent bonds are divided into ;

While Ionic bonds involves the transfer of electrons from a donor atom to another atom and such bonds are easily broken and it is a weaker bond when compared to Polar and Nonpolar bonds. therefore polar molecule and ion bond pair is stronger than ion and ion pair.

Hence we can conclude that ranking  the pairs from strongest to weakest attraction is as follows;  Nonpolar molecule and Nonpolar molecule,  Polar molecule and Polar molecule,  Polar molecule and Ion,  Ion and Ion.

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Answer:

not all mixture have solutes

Please click above answer.

Answer:

The organisms that consume the primary producers are herbivores: the primary consumers. Secondary consumers are usually carnivores that eat the primary consumers. Tertiary consumers are carnivores that eat other carnivores.

Answer:

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

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

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