Chemistry Middle School

help me pls someone plss???help me pls someone plss???

Help Me Pls Someone Plss???help Me Pls Someone Plss???

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Answer 1
I am pretty sure it is D, but I am NOT for sure!

Related Questions

can someone please help me on this i really need help i will litteraly fail

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21. portion
22.mass conservation
23.molecule
Portion
Mass conservation
Molecule

What is the difference in the number of neutrons between an atom of fluorine and an atom of argon?
I need an answer fast PLEASE!

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Flourine has 10 and argon has 8 the difference is 8

The difference between the number of neutrons between an atom of fluorine and an atom of argon is 12

The number of neutrons is obtained by subtracting the number of protons from the mass number of the atom. We can calculate the number of neutrons in each element given this information

Mass number of fluorine = 19

Atomic number of fluorine = 9

Mass number of Argon = 40

Atomic number of argon = 18

Hence;

Number of neutrons in fluorine = 19 - 9 = 10

Number of neutrons in argon = 40 - 18 = 22

Difference between number of neutrons in argon and number of neutrons in fluorine = 22 - 10 = 12

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Dry ice is a form of carbon dioxide that sublimates at room temperature. At a Halloween party, some students noticed that the dry ice underwent a phase change. Which statement below best describes the change in the energy and physical characteristics of the molecules of carbon dioxide during this process?


a: The molecules experienced a physical change from a gaseous state to a liquid state, releasing energy into the environment and reducing the molecular movement.


b: The molecules experienced a chemical change as the carbon dioxide reacted with oxygen, which released oxygen gas into the environment and increased the molecular movement.


c: The molecules experienced a physical change from a solid state to a gaseous state, which increased the molecular movement and the energy of the carbon dioxide molecules.


d: The molecules experienced a chemical change from a liquid state to a solid state, which reduced the amount of energy between the carbon dioxide molecules and decreased the molecular movement.

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The answer is b I think so

Answer:

b

Explanation:

SOMEONE PLS HELP ME WITH THE FIRST QUESTION IN THE BOTTOM.

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Answer:

Yes

Explanation:

Water being burnt in a pot of fire results in H20 Gas.

Answer:When you boil water, the heat given off is a sign that chemical bonds are being broken and new ones are being fore broken.

Explanation: false Water boiling is a physical change and not a chemical change, therefore no bonds are broken.

hope this helps

Explain the environmental benefits of recycling paper products.

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Answer:

:)

Explanation:

Recycling paper helps to reduce greenhouse gas emissions that can contribute to climate change. It takes 70% less energy and water to recycle paper than to create new paper from trees. Manufacturing with recovered paper cuts down on pollution that contributes to smog (and ill health).

Answer:

will help us use less energy. When we just keep filling landfills we take space away for growing trees to benefit our environment

What is a phyiscal and chemical change

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a physical change is changing from one state to another without a change in chemical composition. (ex. freezing, melting, boiling a substance)

a chemical change occurs when one or more substances change into entirely new substances with different properties

Answer:

Physical change is when change occur physically in a substance. It is usually reversible. It includes change in colour, shape, texture, volume etc.

Examples: Cutting of paper, making moulded stuff from dough etc.

Chemical change is when change occurs chemically in a substance. It is non-reversible. When ever a physical change happens, a new substance if formed.

Examples: Burning of paper, transformation of milk into curd etc.

In your first paragraph, describe general properties of waves. Your description should focus on the relationship between energy, matter, and waves.

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Answer:

Properties of Waves. The prime properties of waves are as follows: Amplitude – Wave is an energy transport phenomenon. Amplitude is the height of the wave, usually measured in meters. It is directly related to the amount of energy carried by a wave. Wavelength –

Explanation:

Hope that helped! (can u mark it brainliest?)

Please help!I'll give some points:))

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Warm air is rising from the equator and sinking from the poles. This is called a convection current.
I think this is right, I’m pretty sure

describe how to put a food you enjoy such as hamburger pizza or muffin identify one physical change that takes place as this food is prepared identify one chemical change that takes place as this food and prepare.

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One chemical change would be baking the muffin.
One physical change would be chopping the fruits to add to the mixture

Use the drop-down menus to answer the questions.



Which feature contains genetic material and is present in a eukaryotic cell but not in a prokaryotic cell?


Which two features are present in a plant cell but not in an animal cell?

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Answer:

1. A

2. B and C

Explanation:

got it right in edg (see pic)

Answer:

A B C

Explanation:

person above is right

are pickles a type of a fruit

Answers

Technically, pickles may be considered both a fruit and a vegetable. While they are made from cucumbers, which are a vegetable, the U.S. Supreme Court ruled them a ‘fruit of the vine’ because of their seeds.

explain what the purpose of a gene is!!!!

*20*

Answers

Answer:

The purpose of genes is to store information. Each gene contains the information required to build specific proteins needed in an organism.

Explanation:

gene contains the information required to build specific proteins needed in an organism

PLS HELP ME IN THIS QUESTION

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Answer:

the first one is just water and the second one is gas

Explanation:

1st isnwater and the second is has

Sketch a simple model that shows why the constellations change over the course of a year.

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Answer:

for only five points we will not make sketch n

20 POINTS!!! PLS HELP ME

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Answer:

they just add heat, then it turns to water vapor

Explanation:

The first h20 is water the arrow represents adding heat, and the second h20 represent water vapor (water as a gas)

Answer:

Boiling is not a chemical reaction. It is a physical reaction because after being heated up to a boil turning into steam, it eventually cools back down to water. Like evaporation and then rain.

Explanation:

What are the 2 types of bonds in science and define them.

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Answer:

The two main types of bonds formed between atoms are ionic bonds and covalent bonds. An ionic bond is formed when one atom accepts or donates one or more of its valence electrons to another atom. A covalent bond is formed when atoms share valence electrons.

Explanation:

Answer:

chemyical and Ionic

Explanation:

help me pls someone plss???

Answers

Answer:

a

Explanation:

I am so sorry I don't know how to explain

help me pls someone plss???

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c) water vapor is less dense

Chemical energy is stored in the bonds of (1 point)

glucose molecules.

carbon dioxide molecules.

water molecules.

oxygen molecules.

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Answer:

Glucose molecules

Hope this will help u

Pls help me do this and I'll give you pts and Brainliest thanks friend and anything!

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Hello! Please insert your item as an image and not a document so that I may view it!!

I can’t see the image can you make it into a photo

Write a summary of the portion of the "Gettysburg Address" by Abraham Lincoln.

What does the chemical formula CaCl2 show about the compound it represents?

It is made up of one element.
It is made up of two elements.
It is made up of three elements.
It is made up of four elements.

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Answer:

I WILL RESPOND IN THE COMMENTS WHAT THE ANSWER IS OK!!

Explanation:

I AM GOING TO RESPOND IN THE COMMENTS

Answer:

Why do you have 2 questions, that makes no sense what so ever.

Plz help with this digestive system

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Answer:

(4) mechanical digestion

(5) chemical digestion

(6) enzymes

(7) pharynx

(8) peristalsis

Answer:

(4) Mechanical digestion

(5) Chemical digestion

(6) Enzymes

(7) pharynx

(8) peristalsis

Plz help with this it is the digestive system

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Answer:

see explanation for answer

Explanation:

salivary gland:  1

stomach: 2

small intestine: 6

liver: 4

gallbladder: 5

large intestine: 3

The answers correspond with the numbers on the text boxes, so you would drag number 1 to the salivary gland and so on.

slavery gland is 1
stomach is 2
small intenstine is 6

Describe how an electromagnetic wave carries energy from place to place. Your description should include the terms electric field, magnetic field, and perpendicular.

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Answer:

hope this is what u want

hope it helps

Answer:

the dude above me helped

Explanation:

THE DUDE ABOVE ME

pls help with this science homework

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These are all the answers. Hope I helped

1. A

2. C

3. A

4. B

I think it’s A C A B

help me pls someone plss???

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the answer is D . very energetic

in your own words answer How Do You Define Geography?

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Answer:

the study of physical features of the earth and it's atmosphere, and of human activity as and it is affected by these,including the distribution of population and resources available

Answer:

Explanation:Geography is the study of places and their environments.

A pure substance is a single kind of matter. ----------------------- A(n)
is made up of two or more substances that are together in the same place, but each substance keeps its own properties.

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Answer:21

Explanation:

Answer: 21 i hope this helps:)

The energy available to secondary consumers in an energy pyramid is 500 kilocalories. Approximately how much energy is used by the secondary consumers for their physical functions?

50 kilocalories
500 kilocalories
400 kilocalories
450 kilocalories
please this is worth 50 points

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Your answer will be 400 !
Answer:400100% Guaranteed Took the test, GOT IT RIGHT!!Hope this helps!!

There are several different models that represent compounds. One type of model is shown.

A large black sphere connected to 4 small blue spheres by 4 grey sticks.
What type of model is shown?

a structural formula
a chemical formula
a space-filling model
a ball-and-stick model

Answers

For those looking for the letter its D

Your welcome :)

The representation described in the question is a ball and stick model.

Several kinds of models can be used to represent molecules. Models help us to accurately visualize what the molecule may look like. It shows the actual arrangement of atoms in the molecule in order to help us predict the possible reactions that the molecule may undergo.

A model which consists of spheres connected to each other is a ball and stick model. The spheres are the balls and they are linked to each other by the sticks.

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