Chemistry Middle School


How many of these substances are examples of
elements?

How Many Of These Substances Are Examples Ofelements?

Answers

Answer 1

Answer:

oxygen sodium chloride gold neon

Answer 2

Answer:

The answers are oxygen sodium chloride gold neon

Explanation:

hope i helped you very much

Related Questions

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

Answers

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

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

Answers

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:

Have a great rest of your day
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Which of the following are sources of biomass? wood the Sun manure water paper

Answers

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.

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

Answers

the material should be transparent
the answer is d) transparent

Describe what you know about this chemical formula: 4CO2

Answers

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.

To find more on CO₂, refer here:

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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.

Answers

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. 

Im posting seperate questions so just answer this one


The topic btw is Earthworm behavior

(this is an ed genuity lab report)

Answers

Answer:

lab

Explanation:

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.

To learn more about chemical compound, here:

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Match the term to the definition.

Question 1 options:

As the amount of salt in water increases, the density of the water _________.


The amount of dissolved salt in a liquid.


The type of energy possessed by moving water.


Water circulation created by prevailing wind systems. The Gulf Stream is an example.


The cyclical process of the changing state and movement of water around the Earth through evaporation, condensation, and precipitation.


The distance from the crest of one wave to the crest of another.


This is what moves forward and through a wave.


Water circulation created by differences in density.


The rising of ocean water bringing nutrients up from the deep.


The length of open sea over which wind can blow steadily to create waves 1.
The water cycle

2.
vapor transport

3.
salinity

4.
increases

5.
decreases

6.
surface currents

7.
Coriolis Effect

8.
deepwater currents

9.
trough

10.
wave period

11.
wavelength

12.
water molecules

13.
energy

14.
crest

15.
fetch

16.
electrical

17.
kinetic

18.
downwelling

Answers

Answer:

Vote Down. ITExamAnswers Staff asked 16 seconds ago. Match the term to the definition. (Not all options are used.) Explanation: The correct answer is: a conclusion not justified by the premise of the argument

Explanation:

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).

Answers

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:

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)

Answers

All of the energy from around you including plants so yes

What is a solvent?
I need answers lol

Answers

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'.

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

Answers

Answer:

I think you're answer is right.

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

What is a magnetic domain?

Answers

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.

Indicate the charge carried by the following atomic particles:

a. Proton: _?_

b. Neutron: _?_

c. Electron: _?_

Answers

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

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

Answers

Answer:

true  please dont thank me

answer is true
hope this helps

I need helpppp, someone please help

30 POINTS FOR ANSWERS

Answers

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.

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

Answers

Answer: B. is the correct one.

Explanation:

THE FIRST ONE is correct

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

Answers

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

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

Answers

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

how many different elements are there in this chemical formula C12H24O12

Answers

Answer:

There are 4 elements. C-Carbon H-Hydrogen I-Iodine K-Potassium

Explanation:

Answer:

Molar mass of C12H24O12 = 360.31176 g/mol

Explanation:

is this an element or a compound C12H24O12

Answers

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.

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:

A

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.

How can knowing the formula for the area of a circle help you to remember the formulas for the volume of a cylinder and the volume of a cone?

Answers

Answer:

Your solution is given in the explanation below. Brainliest? :D

Explanation :

The radius or diameter of the circular base or top, as well as the height of the cylinder, are required to compute the volume of a cylinder. A cylinder's volume is equal to the product of the area of its circular base and its height. A cylinder's volume is measured in cubic units. Recall the acronyms for base (b), height (h), and side (s) since they are essential for these calculations to remember surface area and volume formulae.

A cylinder and cone both have circular faces and in both their formulas you need the area of the circular face multiplied by the height (cylinder) or height/3 (cone). So if you know the formula for the area of a circle, you know half of the formulas for the volume of cylinder or cone!

Hope this helps! :)

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.

Answers

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

Please help me with this.

Answers

Answer:

A. pea

Explanation:

The answer is pea because there is a pea there

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.

Learn more about average kinetic energy here:

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how many total elements are there in this chemical formula Na3

Answers

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

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

help i need help with this question

Answers

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

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