Chemistry Middle School

Plz help 10 points!!!!!!

Answers

Answer 1

Answer:

Where are all my chemistry geniuses at??

1. 2HG + O2 = 2HGO

2. Ca + 2H2O = Ca(OH)2 + H2

3. H2 + Cl2 = 2HCl

4. Fe + S = FeS

Explanation:

Hope it helped!

Answer 2

Answer:

Mercury and oxygen react to yield mercuric oxide. > 2Hg + O2 = 2HgO

Calcium and water react to yield calcium hydroxide and hydrogen. > Ca + 2H2O = Ca(OH)2 + H2

Hydrogen and chlorine react to yield hydrochloric acid. > H2 + Cl2 = 2HCl

Iron and sulfer react to yield iron sulfide. > Fe + S = FeS

Explanation:

Related Questions

Which following statements is true?

Electrons contribute most of the mass of an atom.
Electron placement determines an atom’s reactivity.
Proton location determines properties such as luster.
Neutrons determine whether an atom is liquid at room temperature.

Answers

Answer:

first one

Explanation:

hope this helps

El primero es la verdad

Jacinta is learning about the chemicals involved in breathing. Oxygen gas, water vapor, and carbon dioxide are all compounds formed by the chemical reactions between nonmetal elements. Which statement can Jacinta correctly make about the chemical properties of nonmetals?

A. Many nonmetals react with both metals and nonmetals.
B. Nonmetals are poor conductors of heat and electricity.
C. Many nonmetals are gases at room temperature.
D. Nonmetals react only with other nonmetals.

Answers

Answer:

it has to be B or A

Explanation:

I'm not doing this for the points I want the crown please so I hope this is correct I hope you have a great great great day and I hope you had this and get a good grade

I’m pretty sure the answer is A

How many Earth's could fit inside the Sun? plz help

Answers

Answer:

one million earth's

Explanation:

one million earth's fit in the

About 1,000,000!!!!!!! That is a lot

PLS HELP 20 POINTS I WILL ALSO MARK BRAINLIEST
how does energy transfer through a system? Is all the energy conserved?

Answers

Answer:

Explanation:

The total change of energy in any system is always equal to the total energy transferred into or out of the system. This is called conservation of energy. ... Energy can also be transferred from place to place by electric currents. Heating is another process for transferring energy.

Equally Energy system

B in total
pot
5. Lindsey built a clock with 16 divisions, which we'll call Lindsey Hours.
Just like our clocks, the hour-hand on Lindsey's clock goes around twice
per day. How many Lindsey Hours are in one day?
16
-12

Answers

16 x 2 = 32 . So, approximately, 32 Lindsey Hours in a day. Correct me if I’m wrong eheh

32 is the correct answer

Help me pls I don’t understand

Answers

Answer:

Organisms offspring

Explanation:

Key word is Inherits

Answer: B

Explanation: they always get it from there parents

What element has 42 neutrons

Answers

Answer:

arsenic

Explanation:

Answer:

Arsenic has 42 neutrons

What is the strongest reason Elbridge Gerry gave for not signing the Constitution?

Answers

Answer:

He antagonized nearly everyone by his inconsistency and, according to a colleague, "objected to everything he did not propose." At first an advocate of a strong central government, Gerry ultimately rejected and refused to sign the Constitution because it lacked a bill of rights and because he deemed it a threat to republicanism

Explanation:

this is the most complex chemistry question ive seen on brainly

The table below shows the role of different substances during photosynthesis.

Substance Role During Photosynthesis
Glucose Stores chemical energy
Water Combines with glucose to form carbon dioxide
Chlorophyll Traps sunlight

Which of the following statements would correct one of the roles listed in the table?
A.) Glucose combines with carbon to form water.
B.) Chlorophyll reacts with light to produce carbon dioxide.
C.) Water combines with carbon dioxide during photosynthesis.
D.) Chlorophyll stores chemical energy needed for photosynthesis.

Answers

A I think I could be wrong I’m not good at this

Answer:

Which of the following statements would correct one of the roles listed in the table?

Chlorophyll absorbs the light needed for photosynthesis.

Took the test

Explanation:

hope to help

Our skies are blue because of what kind of light? (for my science class pls help- :<)

Answers

Answer:

"Gases and particles in Earth's atmosphere scatter sunlight in all directions. Blue light is scattered more than other colors because it travels as shorter, smaller waves. This is why we see a blue sky most of the time."

The sky is usually blue because white light from the sun

Owls, hawks, and eagles are types of raptors, animals which have hooked beaks and sharp claws, and are therefore adapted for seizing prey animals. Hawks and eagles differ from owls in that they eat their prey animals by tearing them into small pieces, picking out the flesh, and avoiding most of the fur and bones. They also have strong stomachs that can digest most of the bone material which they might eat. The relatively small amount of indigestible bone and fur that remain will be compacted by their stomach muscles into a pellet similar to the owls. Do you think an eagle pellet would be as useful for dissecting as an owl's? Why or why not? Explain your reasoning.

Answers

I do not think that the eagles pellet would be as useful for dissecting as an owls

An eagle pellet wouldn't be as useful for dissection as an owl pellet. The pellet also contains the animal's bones and fur.

What is dissection?

Dissection is the dissection of an animal or plant's body to examine the anatomical structure. In pathology along with forensic medicine, autopsy is used to identify the cause of human death. In biology or natural science classrooms under middle school as well as high school, less thorough dissections of plants or smaller animals stored with a formaldehyde solution are often carried out or displayed.

Medical students on medical schools perform in-depth dissections on adult and child cadavers, both fresh and preserved, as part of their instruction in topics including anatomy, pathology, and forensic medicine. As a result, dissection is frequently performed at an anatomy lab or a mortuary. An eagle pellet wouldn't be as useful for dissection as an owl pellet. The pellet also contains the animal's bones and fur.

Therefore, an eagle pellet wouldn't be as useful for dissection as an owl pellet. The pellet also contains the animal's bones and fur.

To know more about dissection, here:

https://brainly.com/question/29710457

#SPJ3

What do sensory nerve cells do?
A. Carry messages from the brain to the body
B. Carry messages from the cerebrum to the cerebellum
C. Carry messages from the body to the brain
D. Carry water from the well

Answers

Answer:

body2brain

Explanation:

bru

C is the correct answer

When a chemical reaction occurs, what happens to the atoms of the two substances? When a chemical reaction does not occur, what happens to the atoms of the two
Substances?

Answers

In a chemical change, the atoms in the reactants rearrange themselves and bond together differently to form one or more new products with different characteristics than the reactants. When a new substance is formed, the change is called a chemical change

How does a compound differ from a mixture?
The components of a mixture are in a fixed ratio
The components of a compound are in a fixed ratio

Answers

Answer:

In a mixture, each substance is still the same and don't really combine. In a compound, the substances are chemically combined (so the substances that went in have technically changed).

Explanation:

A compound contains atoms of different elements chemically combined together in a fixed ratio. While on the other hand, a mixture is a combination of two or more substances where there is no chemical combination or reaction.

why does Australian get more uv light than othet parts of the world?

Answers

I definitely agree whithe the first person that the earths orbit brings that part closer to the sun

The periodic table is organized left to right by __________.

Metals, nonmetals, metalloids

Metals, metalloids, nonmetals

Metalloids, nonmetals, metals

Nonmetals, metalloids, metals

Answers

Answer:

Metals, metalloids, non-metals

Explanation:

The answer will be B. Metals, metaloides, nonmetals

Please help me I will give you the brain thing with extra points if you help me, please. I need to get this right. 10/10

Answers

The answer would be A! Speed is the number that is on a speedometer in/on a car, and the velocity is the same thing!

Answer:

делай свою домашнюю работу тебе не нужна помощь просто прочитай литературу надеюсь мой ответ помог

Explanation:

это должно помочь

Which of the following elements is a poor conductor of heat and electricity?
A. Mg (12)
B. Ti (22)
C. F (9)

Answers

The answer is B I’m pretty sure

help mehhh i will give out BRAINLEIST

Answers

Answer:

For the after reading part:

Explanation:

I think its right-

Yes paperclip u are right, sorry I was gonna answer too but they beat me

Select all of the elements that are classified as metals.

gold

helium

sodium

aluminum

sulfur

Answers

Answer:

Gold, sodium, aluminum

Explanation:

The metals are located on the left side of the periodic table

Gold,sodium,aluminum are the metals.

The periodic table's left side is where the metals are found.

Silvery-white and light in weight, aluminum is a metal.

Sodium is a soft metal that tarnishes when exposed to air in a matter of seconds

Which elements are metallic?

Iron.Uranium.Sodium.Aluminum.Calcium

Silvery-white and light in weight, aluminum is a metal. It is supple and moldable. Cans, foil, culinary utensils, window frames, beer kegs, and airplane parts are just a few examples of the many goods that employ aluminum. This is as a result of its distinctive attributes.

Sodium is a soft metal that tarnishes when exposed to air in a matter of seconds. With water, it also reacts strongly. Sodium is employed as a reagent in the chemical industry and as a heat exchanger in some nuclear reactors. Salts of sodium, however, are more useful than the metal itself.

To learn more about metals refer to:

https://brainly.com/question/4701542

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How does Energy from the Sun reach Earth? Explain in a 5 sentence paragraph or more.
Thx if you help :)

Answers

Answer:

In three ways

Explanation:

Through radiation, conduction, or convection. Now, I will leave the paragraph writing up to you.

Hope this helps. :)

In three ways rhrufucjdjs dhxhfhdjdhdudu

Bases on the map, which area probably produced the most violent storm systems?

Answers

Answer:

The answer should be Area 3

Area 3 should be considered when probably producing the most violent storm systems.

Causes of violent storm systems?

Hurricanes should be considered the powerhouse weather events that should be suck heat from tropical waters to fuel their fury. These violent storms formed should be over and above the ocean.

So based on this, we can say that Area 3 should be considered when probably producing the most violent storm systems.

Learn more about storm here: https://brainly.com/question/14238959

The graph below shows the motion of a car.

What is the average speed of the car between 0 and 8 seconds to the nearest hundredth in m/s?

Answers

You did not show a graph !

Graph?? I only see white

Help me please really only answer if u know the answer

Answers

Answer:

Genetic matierial that is identical.

Explanation:

Because it produces new sets of chromosomes. This is biology btw. But you can never trust anyone on the internet.

Answer:

Explanation:

Asafahs

Please help will mark brainliest!

Answers

Answer:

1. desert

2. grasslands

3. rainforest

4. tundra

5. temperate deciduous forest

6. coniferous forest

Explanation:

educated guess, good luck

Im not doing the math-

Answers

The average speed of the blocks are 0.36 m/s.
Explanation:
Average speed is defined as the ratio of distance covered per unit time. So if it is said that blocks are pulled to 0.9 m in the right side. This means the blocks cover a distance of 0.9 m from the origin and that distance is covered in 2.5 s. Thus, the average speed can be calculated from the change in speed with respect to time. As at time t = 0 , the speed is also zero, and at time t = 2.5 s , the speed will be
Since, in this case, the speed is equal to the average speed of blocks. So the average speed of the blocks will be 0.36 m/s.

The answer is 0.36 m/s credit to the guy above me (give him Brainlyist) but I also had to do this assessment.

Which of the following statements is true?

A. A solution is a pure substance
B. A solution is a mixture
C. A solvent is dissolved in the solute
D. A solution has the same properties as a colloid

Answers

Answer:

Explanation:

In chemistry, a solution is a special type of homogenous mixture composed of two or more substances. So I believe that it would be B. If it said as such a solute then it would be C.

The smallest particle of an element is called a(n) _____.

mixture

atom

molecule

chemical

Answers

atom

the smallest particle of an element is an atom

The answer is an atom

If a decrease in temperature accompanies a reaction, what occurred?

Energy was released.

Energy was absorbed.

Energy was destroyed.

Energy was created.

Answers

Answer:

Energy was absorbed

Explanation:

plz i need help please help

Answers

Non-metals I pretty sure

Non metals have a nice day

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