Chemistry Middle School

What's the answer to this? (i accidentally selected the last one btw ignore that)

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Answer 1

Answer:

I think you're answer is right.

Answer 2

Texture and shape. Due to the mesh material of the screen

Related Questions

What is a magnetic domain?

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Answer:A magnetic domain is a region within a magnetic material in which the magnetization is in a uniform direction.

Explanation:

A magnetic domain is a region within a magnetic material in which the magnetization is in a uniform direction. This means that the individual magnetic moments of the atoms are aligned with one another and they point in the same direction.

how many total elements are there in this chemical formula Na3

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Answer:

By November 2016, the International Union of Pure and Applied Chemistry had recognized a total of 118 elements. The first 94 occur naturally on Earth, and the remaining 24 are synthetic elements produced in nuclear reactions.

Explanation:

1, there are 3 Na molecules but they are from the same element, hope this makes sense

Describe what you know about this chemical formula: 4CO2

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Answer:i hope im not too late

Explanation:

4CO2 also known as 4CO2 is a chemical compound occurring as an acidic colorless gas with a density about 53% higher than that of dry air. Carbon dioxide molecules consist of a carbon atom covalently double bonded to two oxygen atoms. It occurs naturally in Earth's atmosphere as a trace gas. It also helps trap earths heat inside the earth so i doesnt escape back to outer space.

yourwelcome goodluck ill peel my eyes out if need help again- an 8th grader :p

Carbon dioxide is formed by the covalent bonding of carbon and two oxygen atoms. Thus it is a having the formula CO₂. 4CO₂ means 4 moles of carbon dioxide.

What is carbon dioxide?

Carbon dioxide is an inorganic gas formed by the covalent bonding of carbon and oxygen. The valency of carbon is four and the valency of oxygen is two. Thus carbon shares its electrons two to each oxygen.

Each oxygen in turn shares its two electrons with carbon. Thus both the atoms attains stability. Carbon dioxide is a nonpolar compound with the formula CO₂. Thus one mole of carbon is represented as CO₂.

One mole of CO₂ weighs 44 g. Hence, the molar mass of carbon dioxide is 44 g/mol. As any other compounds one mole of carbon dioxide contains Avogadro number of atom or 6.022 ×10²³ CO₂ molecules.

4 CO₂ indicates 4 moles of CO₂ having 4 × 6.022 ×10²³ =24.08 ×10²³ molecules.

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Which of the following are sources of biomass? wood the Sun manure water paper

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Answer:

I am pretty sure that the following sources of biomass are wood, manure, paper, and water but water is 50% of biomass so I don't know if I would claim it as a source, also the sun. So it is pretty much all of them.

The primary coil in a transformer has 250 turns; the secondary coil has 500. Which is correct?

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Answer: B. is the correct one.

Explanation:

THE FIRST ONE is correct

Which statements describe an element? Check all that apply.

An element is a pure substance.
An element is made of only one type of atom.
An element is made of two or more different types of atoms.
An element can be broken down into a simpler form.
An element cannot be broken down into a simpler form.

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Answer:

An element is a pure substance.

An element is made of only one type of atom.

An element cannot be broken down into a simpler form.

An element is a pure substance
Element is made of two or more different types of atoms
An element cannot be broken down into a simpler form

Examine this image from Citizenship and read President Kennedy’s quote in the speech bubble. How does this quote reinforce the author's purpose in the book? It stresses the need for each citizen to take responsibility for his or her own well-being. It introduces the idea of citizens giving back more to the community than they take. It helps frame the idea that citizenship requires being actively involved in civic life. It states the theme that citizens and great leaders need to work together.

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It helps frame the idea that citizen ship requires being actively involved in civic life.

Answer:

It helps frame the idea that citizenship requires being actively involved in civic life.

Explanation: I took the test :)

Identify/describe how the process of physical weathering breaks down materials at the Earth's surface (by the following change agents: water movement, freezing, abrasion/pressure, exfoliation. plant growth, and animals).
Explain the role of each factor in chemical weathering (water, acid, and air).

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Answer:

Exfoliation: When temperature of rocks rapidly changes that can expand or crack rocks.

Freeze-Thaw: when water gets into a crack, and it freezes ; the crack gets wider

Plant Growth: this is when a seed falls into a crack in a rock, and breaks apart the rock with its roots.

Animals: small animals like moles and mice can burrow into a rock and crack it open

Explanation:

Please help me with this.

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Answer:

A. pea

Explanation:

The answer is pea because there is a pea there

What is a solvent?
I need answers lol

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It’s A the substance that dissolves into another substance

Answer:

The first one is the answer

Explanation:

The reason is because the term 'solvent' can be defined as a substance that has the ability to dissolve a given solute to form a solution with it. An example is water because it can disolve most things, hence why its called the 'universal solvent'.

Give at least 3 examples of effects of weathering on the planet’s surface.

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Answer:

earth

Explanation:

weathering it effects are earth plants becasuse we have to save are own earth surface.

The effects of weathering disintegrate and alter mineral and rocks near or at the earth's surface. This shapes the earth's surface through such processes as wind and rain erosion or cracks caused by freezing and thawing. Each process has a distinct effect on rocks and minerals

John is designing a greenhouse, which will keep plants warm and allow them to grow even when it is cold outside. John wants the greenhouse to let in as much light as possible. What kind of material should John use to build the outside of the greenhouse?

Group of answer choices

reflective

opaque

translucent

transparent

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the material should be transparent

the answer is d) transparent

Indicate the charge carried by the following atomic particles:

a. Proton: _?_

b. Neutron: _?_

c. Electron: _?_

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Answer:
A. Protons are positive and carry a charge of +1
B. Neutrons are neutral so carry a charge of 0
C. Electrons are negative and carry a charge of -1

Protons are Positive +
Neutrons are Neutral (or nothing) 0
Electrons are negative

Which is a true statement about the following chemical formula?
2(C6H12O6)
A.The formula is a molecule but not a compound
B.There are 18 molecules in this formula
C.There are 2 molecules in this formula

Answers

Answer:

Your answer is C (I think I'm not absolutely sure)

Explanation:

There are two types of chemical compound one is covalent compound and another is ionic compound in chemistry. In ionic bonds, electrons are completely transferred. The correct option is option C.

What is chemical Compound?

Chemical Compound is a combination of molecule, Molecule forms by combination of element and element forms by combination of atoms in fixed proportion.

Covalent compounds are formed by covalent bond and ionic compounds are formed by ionic bond. Covalent bond is formed by sharing of electron and ionic bond are formed by complete transfer of electron. Ionic bonds are stronger than covalent bonds.

C₆H₁₂O₆ is a molecular formula for glucose. C₆H₁₂O₆ represents one molecule of glucose. 2(C₆H₁₂O₆) represents two molecule of glucose.

Therefore, the correct option is option C.

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I need helpppp, someone please help

30 POINTS FOR ANSWERS

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A mixture is something you can take apart like cereal a compound is a lot of things brought together and a element is tons and tons of of things put together.

Answer:

A element is a atom that has specific properties individually or with identical atoms.

A compound is a combination of two or more elements.

A mixture is two or more separated substances with individual properties.

Which statements are examples of how the use of resources has changed?

Select all correct answers.

More products are made from recycled materials.

Car companies have developed hybrid cars.

More wind farms are present in the United States.

Cars largely rely on oil.

Answers

Answer:

B, A, C

Explanation:

the awnsers that are displayed are the only options that are new, and clean resorsces, we have always used oil in cars but hybrids are a new consept, same as wind power

Good LUCK!!

More products are made from recycled materials
Car companies have developed hybrid cars
More wind farms are present in the united states

T or F? A transformer is a device that can only increase the voltage carried in power lines.

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Answer:

true please dont thank me

answer is true
hope this helps

Which statement is not true?
A. When atoms are combined together they always form molecules
B. When atoms are combined together they always form compounds
C. A molecule has more than one type of the same atom

Answers

Answer:

Explanation:

Because when atom combine in a bond they form molecules

Hydrogen atom +Hydrogen atom =Hydrogen molecule

H+H====== H₂

Make me brainliest

The answer is B. Atoms when combined from molecules and compounds. Also, a molecule has more than one type of the same atom. For example, H2O has two hydrogen atoms and one oxygen atom.

An oval shape, which may be elongated or nearly circular; the shape of the planet’s orbits.

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Answer:

The statement that you typed is mostly correct

Explanation:

Does growing plants with your Home Hydroponics Kit change your role in the energy pyramid? How? (the role is at the top of the energy pyramid because we're humans)

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All of the energy from around you including plants so yes

help i need help with this question

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Answer:

(im not 100% sure but thats what i think i know about this .)

mendelian :

amplification

law of segregation

nondisjunction

linked traits

Explanation:

mutation:

codominance

deletion

incomplete dominance

independent assortment

Insertion

radiation

virus

Difference between compounds, elements and mixtures, with examples

Giving brainliest

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Answer:

Compounds are formed because of chemical bonding between two elements. Mixtures are formed when substances are physically mixed with one another. Compounds are basically of three kinds: Ionic, metallic and covalent.

Explanation:

I hope this helps! :)

Answer:

Elements are substances that are made up of only one type of atom. They cannot be broken down into anything simpler.

When two (or more) elements are chemically joined together they form compounds.

A mixture contains two or more substances that are not chemically joined together and can be separated.

Im posting seperate questions so just answer this one

The topic btw is Earthworm behavior

(this is an ed genuity lab report)

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Answer:

lab

Explanation:

A ____________________ ____________________ is like a recipe for a chemical substance

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why is the blink so long.The smallest unbreakable unit of a compound is called chemical formula is like a recipe for a chemical substance Subscript tells the number of atoms of each element present in a formula Coefficient tells the number of molecules participating in the reaction of a chemical equation Number of atoms in NaCl 2 Number of atoms in 2(Cl2)

the answer is formula

what would a person with diabetes type 1's Blood glucose level after 1 hour be?

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Answer:

under 180 mg

Explanation:

experts very on what the number should be but the ADA says a general goal is a blood sugar under 180 MG/DL, 1 to 2 hrs after a meal

Please help me with this and i'll give you brainlyst

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Answer:

1.) increases

2.) salinity

3.) kinetic

4.) coriolis effect

5.) the water cycle

6.) wavelength

7.) surface current

8.) Deepwater currents

9.) upwelling

10.) wave period

answering so that you could give this guy brainliest

When is the Law of Conservation of Mass not true? I am so confused...

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Answer:

When one of the products of the equation is a gas. The gas escapes and isn't weighed and what is left is not the total mass of the system.

Explanation:

;)

Answer:

The conservation of mass does not apply if the system is open and energy escapes. However, it does continue to apply to totally closed/isolated systems. Therefore, if energy cannot escape a system then its mass cannot decrease.

Explanation:

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pls help :(

The temperature of a 100 mL sample of pure water is 25°C. This is a measure of--

F the amount of chemical energy stored in the water molecules.
G the amount of heat released when water molecules react
H the average kinetic energy of the water molecules
J the total potential energy of the water molecules

Answers

I think it’s H, the average kinetic energy of the water molecules, since temperature is a measure of the average kinetic energy of a thing.

The temperature of a substance is a measure of the average kinetic energy of the molecules in the substance. Hence, option H is correct.

What is average kinetic energy?

The average kinetic energy of all the molecules is assumed to be directly proportional to the absolute temperature of the gas.

Temperature measures the average kinetic energy of the particles in a substance.

Thermal energy measures the total kinetic energy of the particles in a substance.

The greater the motion of particles the higher a substance's temperature and thermal energy.

The kinetic energy of a moving molecule, like that of any moving object, is the energy associated with its motion.

Hence, option H is correct.

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is this an element or a compound C12H24O12

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Answer:

it's got to do something with milk I guess it's the sugary substance found in milk and it's a compound

Answer:

C12H24O12 is a compound.

When you have a pot of water on the stove, heat is transferred to the water. Describe the behavior of the water molecules and how temperature is affected.

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Answer:

The water molecules are faster in their movement, and the temperature of the water and the molecules are increasing.

Explanation:

Answer: Temperature causes water molecules to move more quickly.

Explanation: Because each individual molecule has more energy as it gets hotter If you get water hot enough, the molecules move so much that the hydrogen bonds that hold them together start to break and the water becomes a gas, water vapor.

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