Chemistry Middle School

Please help ASAP I will give 19 points please help

Don’t answer if you don’t know it, if you answer that is really rude because I need the answer and only 1 more person would be able to answer not 2 people to not answer if you have no answer. I am making it clear again DO NOT ANSWER IF YOU DONT KNOW THE ANSWER

Answers

Answer 1

Answer:

Can you pls clarify this

Explanation:

I dont

Answer 2

the right answers are on quizlet!!! it’s a great use.

Related Questions

Can you help answer BOTH questions pleaseee!!!

Answers

1 and 2 is 10,400 and 12.5

How are the scientific method and the engineering method similar?

Both methods identify failure points.
Both methods construct a hypothesis.
Both methods focus on designing things.
Both methods work on finding solutions to problems.

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The answer is B

Explanation: Not D because only engineering does that
Plz mark brainliest

Which type of variable is kept the same throughout an experiment?

Constant variable
Measured variable
Outcome variable
Test variable

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Answer:

Constant variable.

A Constant variable!

Please help meeeee!!!!!!!
There is a big push right now in trying to rely on nonrenewable resources for the majority of our energy needs. Should we even try to power the world with 100% renewable resources? Justify your reasoning

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Answer: Non-renewable energy comes from sources that will run out or will not be replenished in our lifetimes—or even in many, many lifetimes.

Most non-renewable energy sources are fossil fuels: coal, petroleum, and natural gas. Carbon is the main element in fossil fuels. For this reason, the time period that fossil fuels formed (about 360-300 million years ago) is called the Carboniferous Period.

All fossil fuels formed in a similar way. Hundreds of millions of years ago, even before the dinosaurs, Earth had a different landscape. It was covered with wide, shallow seas and swampy forests.

Plants, algae, and plankton grew in these ancient wetlands. They absorbed sunlight and created energy through photosynthesis. When they died, the organisms drifted to the bottom of the sea or lake. There was energy stored in the plants and animals when they died.

Over time, the dead plants were crushed under the seabed. Rocks and other sediment piled on top of them, creating high heat and pressure underground. In this environment, the plant and animal remains eventually turned into fossil fuels (coal, natural gas, and petroleum). Today, there are huge underground pockets (called reservoirs) of these non-renewable sources of energy all over the world.

Advantages and Disadvantages

Fossil fuels are a valuable source of energy. They are relatively inexpensive to extract. They can also be stored, piped, or shipped anywhere in the world.

However, burning fossil fuels is harmful for the environment. When coal and oil are burned, they release particles that can pollute the air, water, and land. Some of these particles are caught and set aside, but many of them are released into the air.

Burning fossil fuels also upsets Earth’s “carbon budget,” which balances the carbon in the ocean, earth, and air. When fossil fuels are combusted (heated), they release carbon dioxide into the atmosphere. Carbon dioxide is a gas that keeps heat in Earth’s atmosphere, a process called the “greenhouse effect.” The greenhouse effect is necessary to life on Earth, but relies on a balanced carbon budget.

The carbon in fossil fuels has been sequestered, or stored, underground for millions of years. By removing this sequestered carbon from the earth and releasing it into the atmosphere, Earth’s carbon budget is out of balance. This contributes to temperatures rising faster than organisms can adapt.

Can anyone help me out with these questions

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Answer:

2. B It is the outermost layer of Earth, composed of solid rock and divided into sections called plates. 3. B The inner core is kept solid by the intense pressure of all the layers above it.

Explanation:

Materials move across a cell membrane in a process called _______.

Answers

Answer:

Diffusion

Explanation:

Osmosis? Diffusion?

Match the term with the definition.

Group of answer choices

Compressibility
Flammability
Heat of combustion
Toxicity

A) How easily can a substance be set on fire
B) Measure of how much heat is given off when a substance is burned
C) The ability of a substance to damage or harm an organism
D) Measure of how much the volume of matter can decrease under pressure

whats the order?

Answers

Answer:

here are your answers

Explanation:

compressibility ( D )

flammability( A )

heat of combustion ( B )

toxicity ( C )

Water’s chemical formula is . One atom of bonded to two atoms of . The hydrogen atoms are to one side of the oxygen atom, resulting in a water molecule having a positive charge on the side where the hydrogens reside and a negative charge on the other side, where the oxygen atom resides. This separation
of charge on of the molecule is called
word bank:H2O,oxygen,oppiste ends,hydrogen,attached,polarity

Answers

Water’s chemical formula is H2O
One atom of oxygen bonded to two attached atoms of hydrogen.
The hydrogen atoms are to one side of the oxygen atom, resulting in a water molecule having a positive charge on the side where the hydrogens reside and a negative charge on the other side, where the oxygen atom resides. This separation
of charge on opposite ends of the molecule is called polarity

I hope this right and can help you!

Compare and contrast the alkaline battery and a Zinc carbon battery. put in some other facts about them too. write somewhere around 2 paragraphs.

I'll mark brainlyest to whoever has the best answer and give them 50 points for helping me.

Answers

The alkaline batteries, have a higher energy density and the time a battery can remain in storage without losing any of its capacity. Also, there is a specially designed coating inside the batteries that reduces contact resistance for greater reliability. Lastly, the alkaline cells have an extra power formula to maintain power for a longer period of time in high drain devices. Alkaline batteries provide more energy than zinc carbon batteries.

The Zinc carbon batteries, are a reliable source of power for appliances that consume little energy. Some examples are: remote controls for televisions, clocks, and smoke detectors. A reason that you should use the Zinc carbon batteries is for, the low energy consumption. This will lead to being able to use the appliances for a longer time for the same money.

The difference between the batteries is the capacity. Because of composition, an alkaline battery, delivers more energy than a zinc carbon battery.
The only downside is that, both batteries need to be used in different appliances.

Hope this helps! :)

What is the difference between a homogeneous and heterogeneous mixture?

Answers

A homogeneous mixture is made up of multiple different substances. (You can see different parts)
Ex: Cereal in milk or ice in soda

A heterogeneous mixture is a mixture that is mixed well. ( you can’t see the different parts)
Ex: Rain or air

You wake up in the morning and make yourself a cup of coffee. You pour the coffee in your cup, add milk, add sugar, and stir everything together. The result is a uniform cup of caffeinated goodness. Each sip should taste and look the same.

This is an example of a homogeneous mixture. In this type of mixture, the components are evenly distributed throughout and the mixture has a uniform appearance. You shouldn't be able to pick out the individual components. Additionally, you can describe a homogeneous mixture as having only one phase. A phase is any part of the mixture that has the same chemical properties and uniform distribution of the components.

Heterogeneous

When you're eating a bowl of cereal, you are consuming a heterogeneous mixture. You can easily see the different things that make up this mixture: the milk and the cereal. Each spoonful will have different distributions of the components.

A heterogeneous mixture has components that are not evenly distributed. This means that you can easily distinguish between the different components. A heterogeneous mixture has two or more phases. This doesn't necessarily mean phases of matter, like liquid or solid. For example, a mixture of water and oil has two liquid phases. Each phase has its own distinct chemical properties.

How do matter and energy move through an ecosystem?
My scientific explanation is:

Your answer should include at least 6 complete sentences to explain the claim, evidence and reasoning.
Be sure to check your grammar and spelling.

Answers

Food chains allow energy to move through an ecosystem. For example, energy is transferred from organism to organism such as the sun gives energy to grass, grass gives energy to grasshoppers when they eat grass, mice eat grasshoppers, and snakes eat mice, eagles or bigger birds of prey eat snakes. A technique discovered by Charles Elton named energy pyramids display how energy is dispersed on a pyramid starting from producers to tertiary consumers. An example of a producer would be grass, primary consumer would be a grasshopper (herbivores), a secondary consumer would be a mouse/mice (eat herbivores), and a tertiary consumer (eat secondary consumers) would be an owl. Starting from the bottom of the energy pyramid (producers) to the top (tertiary consumers) it 10% of energy is available to travel up the pyramid. That is your scientific explanation!

Pollen is transferred from the stamen of one flower to the stigma of another. What has occurred?

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Cross-pollination is the transfer of pollen from the anther of one flower to the stigma of another flower on a different individual of the same species. Self-pollination occurs in flowers where the stamen and carpel mature at the same time, and are positioned so that the pollen can land on the flower's stigma.

I think that does little animals are Making honey

New Orleans has an altitude at and below sea level, a latitude near the Tropic of Cancer (the equator-zone), is surrounded by water, and has no mountains near by. What would you expect the climate to be?

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Answer:

Rainy, sunny and humid.

Explanation:

SCIENCE! PLZ HELP FAST !! URGENT!!
What happens to potential energy when you move against the magnetic force?

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Answer: The field produces a repulsive force pushing them apart. They repel each other. In this case, the closer they are, the higher their potential energy will be. If allowed to move, they may move as far apart as possible or one will swing around to change its orientation.

Explanation:

PLS HELP ASAP

How does the mass of an object affect its force?

Answers

Answer:

If mass increases, force increases.

Explanation:

hope this helps, pls mark brainliest :D

Explain the Flow of Energy in Photosynthesis: Where does the Energy come from initially? What is it called? What type of energy does it become? Finally what type of Energy is it broken down into? How does this all happen? Explain with details! I really appreciate your help

Answers

Answer:

The flow of photsynthesis comes from the sun

Explanation:

in which the plant absorbs. The plant then turns it into a type of food like glucose, protein, vitamin c etc. the plant uses this energy to help it grow!

Hoped this helped :)

plants absorb sunlight and use carbon dioxide to produce glucose and oxygen

The table shows the densities of four samples, each of the same volume.

DENSITIES OF SAMPLES

Sample Density (g/cm3)
W 5.1
X 1.7
Y 7.3
Z 3.5

Which sample has the greatest mass?

Answers

Answer:

Its Y

Explanation:

The formula for density is D=m/v therefore the formula for mass is m=d(v) since v is a constant the sample with the highest density will also have the highest mass. Meaning that Y is the answer.

True or False: As air masses move, they rarely change temperatures and/or moisture levels.

Answers

true is the answer to this

Connect as many terms that you can think of. Each term should be related to
the term at the center,
LIGHT

Answers

Light PLEASE Thanks me I need points to ask questions

so the answer doesn’t have to be right to get points wow

I have 11 protons, which element am I?
A. Silicon
B. Fluorine
C. Argon
D. Sodium

Answers

D. sodium is the correct answer

Answer:

D. Sodium

Explanation:

We know that the atomic number of sodium is 11. This tells us that sodium has 11 protons and because it is neutral it has 11 electrons. The mass number of an element tells us the number of protons AND neutrons in an atom (the two particles that have a measurable mass).

HELPPPPP

How does the acceleration of an object affect its force?

Answers

By a other object using force

states that the acceleration of an object increases with increased force and decreases with increased mass. ... Notice how mass and force affect acceleration. Newton's second law. The acceleration of an object increases with increased force, decreases with increased mass, and is in the same direction as the force.

What does the conversation of mass say about the amount of atoms in the reactants compared to the products?

Answers

Answer:

the mass of any one element at the beginning of a reaction will equal the mass of that element at the end of the reaction. If we account for all reactants and products in a chemical reaction, the total mass will be the same at any point in time in any closed system.

Answer:

[tex]\boxed {\boxed {\sf Atoms \ in \ reactants \ = atoms \ in \ products}}[/tex]

Explanation:

The Law of Conservation of Mass states that mass cannot be created or destroyed.

In a chemical reaction, this means the mass of the reactants (substances going in and being changed) must equal the mass of the products (new substances from the reaction).

In addition, the amount of atoms must stay the same. The atoms can and will reconfigure to form different compounds, but the number of atoms stays the same.

It is important that engineers build a structure that is safe. What do they look for when testing their designs?

Failure points
Fair tests
Prototypes
Variables

Answers

Variables
or failure points

Answer:

Failure Points

Explanation:

Engineers want to test the areas that may possibly fail when they are building designs so when they go to actually build it they know it will not fail.

_____ relating to the separation of charges in a molecule

___ meaning to repel water, literally “fear of water”

___ this term describes the force of attraction between adjacent water molecules.

___ meaning attracted to water or literally “water loving”

___ term describing the tensional force created by water at its boundary with air
word bank: surface tension, cohesion, hydrophobic, hydrophilic, polarity

Answers

1. polarity
2. hydrophobic
3. cohesion
4. hydrophilic
5. surface tension

1. polarity

2. hydrophobic

3. cohesion

4. hydrophilic

5. surface tension

what do you mean by cohesion ?

cohesion is an attractive force of measure where molecules are stick to each other and it is caused by cohesive force between like molecules.

It is an intrinsic property of a molecule, derived by its shape, structure, and electric charge distribution.

When cohesive molecules are become closer to each other, the electrical attraction between these molecule holds them together.

This forces are responsible for surface tension. For example mercury is a cohesive substance, strongly attracted to each other, bead together, sticks to itself when it flows.

When cohesion and adhesion combinedly work, it will lead to capillary action.

Hence, when water climbs up the interior of a thin glass tube or the stem of a plant, Cohesion holds the water together and adhesion helps the water molecules stick to glass.

Learn more about cohesion, here:

https://brainly.com/question/1928484

#SPJ2

Please look at these, i'm confused, i need the questions answered, and i need a graph or just need to know how to make the graph (idk how).

Answers

Set up a graph that shows voltage on the x axis and the number of paper clips picked up on the y axis.

When you graph anything your points are made up of an x value and a y value (x,y).

You’re going to use the voltage as your x value and the average number of paper clips picked up at that given voltage as your y value.

I’ll do the first one for you! For the 25-turn electromagnet at a voltage of 1.5V the average number of paper clips picked up was 6. Giving us the point (1.5,6) that’s what you should be graphing. Do the same for all of the others.

Comment if you need more clarification! I hope this helps!

which of the following can cause an algal bloom ?

Answers

Answer:

I believe its either C or D

Answer:

The answer should be B.

What are the four main components of a galaxy?
A. Gas, dust, rock, and planets
B. Planets, stars, gas, and rock
C. Stars, clouds, orbits, and other objects
D. Stars, gas, dust, and other objects

Answers

It will be D stars, gas, dust, and other objects

The four main components of galaxy are Stars, gas, dust, and other objects

Galaxy is a any type system that contain stars,dust, stars remnants, interstellar gas, dark matter and other objects to form universe.

It is derived from Greek word which means milky ,hence it is termed milky way.

Galaxies have different shapes and variations in which the systems are formed.

Galaxies have different in structure and the king of activities that occur in them. Some are site of formations of vigorous sites and so on.

Therefore,

This separation of charge on (blank) of the molecule is called (blank).

Answers

Answer:

Polar and Non-Polar Molecules

Explanation:

Polar and non polar

How do substances move across the cell membrane?

Answers

Answer:

The plasma membrane by diffusion

Explanation:

Materials move within the cell's cytosol by diffusion, and certain materials move through the plasma membrane by diffusion

Plasma membranes by diffusion

Label the picture, please

Answers

Answer:

(in the pic above)

Explanation:

P= product

R= reactant

S= subscript

C= coefficient

Y= yields

Answer:

sorry BUT I need points

Explanation:

Other Questions

HELP!! I WILL GIVE BRAINLIESTEarth's magnetic reversals are recorded inA. the asthenosphereB. sea-floor rockC. deep-ocean trenchesD. the mantle Anasia is a basketball player who regularly shoots sets of 2 free-throws. Suppose that each shot has probability0.7 of being made, and the results of the shots are independent.The table below displays the probability distribution of X, the number of shots that Anasia makes in a set of 2attempts.2X=of makes 0 1P(X)0.09 0.420.49Given that r = 1.4 makes, find the standard deviation of the number of shots that Anasia makes.Round your answer to two decimal placesshots What is the domain and range? simplify 4p^5q^3*p^2^-4 Cells divide at different rates. Skin cells divide __________. Liver cells divide ____________. Bone marrow, stomach and intestine lining cells divide _____________.a. never, continuously, sometimesb. very often, sometimes, continuouslyc. continuously, sometimes, neverd. sometimes, never, continuouslyQuestion 2What are the 2 key molecules that control and coordinate the cell cycle?a. DNA and RNAb. CDK and Cyclinc. Cyclin and mitochondriad. Apoptosis and CDKQuestion 3A cell dies and the cell next to it enters G1 phase. Which activity would happen next?a. Chromosome duplicationb. Cell destructionc. Cell growthd. Chromosome separationQuestion 4At the end of G1 in Checkpoint 1, what 2 things are checked in order for the cell to proceed into the S phase1?a. cell growth and DNA checkb. cell growth and chromosome duplicationc. cell division and DNA checkd. cell growth and cell divisionQuestion 5At the end of S phase in Checkpoint 2, what 2 things are checked in order for the cell to proceed into the G2 phase?a. chromosome duplication and cell divisionb. cell growth and chromosome duplicationc. cell division and DNA checkd. cell growth and cell divisionQuestion 6At the beginning of mitosis in Checkpoint 2, what is checked in order for the cell to proceed mitosis?acell growthbcell divisioncchromosomes are attached to spindlesdchromosome duplicationQuestion 7What happens when the cell supervisors CDK and Cyclins do not work correctly?aThe cell can become cancerous.bThe cell is completley normal.cDamaged cells are destroyed.dThe damage in the cell is repaired.Question 8Which of these must occur during S phase of the cell cycle so that two daughter cells can be produced during M phase?aThe DNA must be replicated.bThe cell membrane must be expanded.cThe cytoplasm must be separated.dThe chromosomes must be joined.Question 9This final process of cellular division where the cytoplasm is divided into two cells is calledaCytokinesisbMeiosiscMitosisdInterphaseQuestion 10Which of the following activities occurs in between the two gap phases (G1 and G2)?aReplication of DNAbGrowth of the cellcformation of mitotic spindledbreakdown of nuclear membraneQuestion 11If a dog (canis familiaris) has 78 chromosomes in each of its body cells, how many chromosomes will be in each daughter cell after mitosis?a78b39c26d156Question 12The stages of mitosis occur in which of the following orders?aA-P-M-TbT-A-M-PcP-M-A-TdM-T-P-AQuestion 13Before DNA can replicate the DNA molecule separates into two strands, which are then used to construct 2 identical strands of DNA. This process ensures that theaparent cells use little ATPbmitochondria are genetically identical to chloroplastsccytoplasm is in equillibriumddaughter cells are genetically identical to parent cellsQuestion 14Which of the following organelles organizes the movement of chromosomes during mitosis?aendoplasmic reticulumblysosomeccentrioledperoxisomeQuestion 15G1 Phase, S Phase, and G2 Phase are all parts of -aMitosisbInterphasecCytokinesisdTelophase How will you meet the requirements to complete 60 minutes of cardiovascular endurance each day this week? Which of the following areas is MOST likely to experience syncretism?I. Farming villages with a single ethnic groupII. Cities with people from different ethnic backgroundsIII. Along the border between two countries with different ethnicitiesIV. Rural areas with homogenous culturea. I and IIb. I and IIIc. II and IIId. II and IVe. III and IV At which age did a man complete his service to the Spartan military?a 36b 60c 21d 49pls answer and ill give you 5 stars if you have a decent explanation.HAVE A GREAT DAY! THX Ashley and her four friends went trick-or-treating. Each one of them got 4/5 of a bag of treats. How many bags of treats did they have in total? Describe how the dynasty system worked in Ancient Egypt Use the figure below to answer the following question:AtmospherePantstrogenAnimalsAWachDeathturint and teceBEDentlyingbacteriaDecomposersNitratesNO,Drogeringbacteria inplant rootsNyingbacteriaFNitrogen-foongbacteris in so(Pl 4,In the part labeled B plants take up nitrogen through their roots. What is this processcalled?O NitrificationO AmmonificationAssimilationO Denitrification Which is not a principle of the cell theory? Please help me....... To control whether an object is solid or incorporeal (things can pass through it) you would use the: ANSWER THIS PLEASE!!! ITS DUE TODAY!!! What is piracy? What is copyright protection? Why do you think we have laws protecting individuals and companies from having their work copied for free? What is the percent composition of Ca(C2H3O2)2?Select one:a. 25.3% Ca, 30.4% C, 3.8% H, 40.5% Ob. 40.4% Ca, 24.2% C, 3.1% H, 32.3% Oc. 6.67% Ca, 26.67% C, 40.0% H, 26.67% Od. 12.5% Ca, 25% C, 37.5% H, 25% O SOS is a life giving organization to some orphans in the world . Support this statement with its programs in Nepal . ittooktruckstohourstodrivetothebottomofthemassiveman-madehole yungbuld or billie please chose f(x) = x^2 + 2x 4f(3) = ?