Chemistry Middle School

Need help with this.

Need Help With This.

Answers

Answer 1

Answer:

Explanation:

H3PO4.

Answer 2

Answer:

I'm pretty sure it's H3PO4

Related Questions

How much energy is required to completely melt a 250 gram ice cube that is already at 0 degrees Celsius? Show your work & units. Expected Answer = 83,500 J

Answers

Answer:

Q = 83500J

Explanation:

[tex]Q = L_{ice} *m[/tex]

[tex]L_{ice} = 3.34*10^{5} \frac{J}{kg}[/tex]

[tex]m = 250g = 0.25kg[/tex]

[tex]Q = (3.34*10^{5} \frac{J}{kg})*(0.25kg)[/tex]

[tex]Q = 83500J[/tex]

A 200 g sample of water at 60.0 degrees Celsius is heated to water vapor at 140.0 degrees Celsius. Expected Answer = 501,440 J Before trying to solve this problem, explain:
what is happening to the water from 60.0 degrees Celsius to 100.0 degrees Celsius?
what happens at 100.0 degrees Celsius?
what happens from 100.0 degrees Celsius to 140.0 degrees Celsius?
Then solve the full problem, showing work & units.

Answers

I’m not sure what your problem is about but I’m assuming that it has to do with calculating the energy at each portion of the graph. You can do that using the formula q=mc Δ T

How much energy is required to completely vaporize 250 grams of liquid water that is already at 100 degrees Celsius? Show your work & units. Expected Answer = 565,000 J

Answers

Answer:

564100J (~ 565000J) of heat energy is required.

Explanation:

The enthalpy of vaporization of water is 2256.4J/g, meaning that 2256.4J of heat is required to convert 1 gram of water at 100 degrees Celcius to steam at 100 degrees Celcius.

In your case, we have 250g of water at 100C and we want to vaporize it to steam (also at 100C).

This requires ΔH = 2256.4(250) = 564100J of heat energy.

QUICK ANSWER THIS
Aerobic Respiration is the release of energy from food ________ the use of oxygen
A.With
B.Without

Answers

Answer:

A. with.

Explanation:

I believe it’s A because I don’t think without would be in the sentence so I would go with with.

what is one-way water moves through the nonliving parts of an ecosystem during the water system?

Answers

Answer:

Water moves through the help of living organisms in an ecosystem. ... Plants absorbs water through their root system and loss by transpiration. Water also moves through the living organisms in an ecosystem. Other nonliving processes such as evaporation, precipitation, water returns back into the atmosphere.

Explanation: welcome

Answer:

evaporation

Explanation:

Specific heat and thermal Energy question. Will give brailiest. 30 points please answer!! ASAP

Answers

What’s the question?
Where’s The Question At ?

A pitcher throws a softball toward home plate. When the ball hits the catcher’s mitt, its horizontal velocity is 32 meters/second. The softball’s velocity goes to 0 meters/second in 0.8 seconds when caught. If the softball has a mass of 0.2 kilograms, what’s the force of the impact? Use F = ma, where .

Answers

Answer:

To calculate the force of impact F, first lets calculate the acceleration a of the ball:

a=v/t where v is the velocity of the ball and t is time

a=32/0.8=40 m/s²

To get the force F we need the Newtons second law:

F=m*a where m is the mass of the ball and a is the acceleration.

F=m*a= 0.2*40 = 8 N

So the impact force is F= 8 N.

Explanation:

Compare and contrast convection and conduction. Cite at least 1 real-life example to support your answer.

Answers

Answer:

Convection is different because it's through the movement of a gas or a liquid. But conduction is through direct contact.

After a car is turned on, the engine becomes hot.

Hope this helps!

Red blood cells need iron. They store iron and typically contain more iron than the fluid around them does. Which action would show the blood cells doing active transport?

pushing iron out
bringing iron in
swelling
shrinking

Answers

The correct answer is the second answer choice: bringing iron in!
The answer is bringing iron in !!

The Newton is the SI unit for ____.
temperature
density
weight
mass

Answers

Answer:

Mass

Explanation:

Weight is the correct answer and not any of those other options

Please help 20 points!

Answers

The answer is Strait

Compare the chemical reaction that causes the Statue of Liberty to look green with the chemical reaction that causes a bike to rust.

Answers

Statue of Liberty - Is do to the sun which made the statue change color.

Bike rust - Is do to being exposed to moisture ( like Water, or any type or liquid.)

Hope this helps!!

Both the situations are examples of corrosion. The green colour seen in statue of Liberty is due to the copper oxide formation whereas the resulting in bike parts is due to the formation of iron oxide in the surface.

What is corrosion?

Corrosion is a chemical process by which the metals are destroying and change in colour. Metal surface when open to air or water will react with the oxygen forms corresponding oxides.

Corrosion is an electrochemical process where the oxygen acts as the anode and the metal surface cathode where the oxide deposits and the colour changes. Materials containing iron will react with oxygen forms a red iron oxide called rust which then completely corrode the metal.

Similarly, the statues are made of metal alloys containing copper. Copper also reacts with air or water forms the copper oxide which is green in colour that is why the statues are turning to a gree patchy colour over time.

To find more about corrosion, refer the link below:

https://brainly.com/question/489228

#SPJ2

Need help with this.

Answers

Answer:D

Explanation:

Answer:

here the answer would be D

Explanation:

if the two substances together have a different weight then the substance split but added together then this suggest that a new substance with a whole new mass was formed.

The diagram shows a food web in a grassland.

What best describes the role of the grasshopper in the food web?

Group of answer choices

A primary consumer that is food for the lizard and hawk

A secondary consumer that is food for the lizard and hawk

A primary consumer that is food for a single predator, the lizard

A secondary consumer that is food for a single predator, the lizard

Answers

The answer is the first one a primary consumer that is good for the lizard and hawk

Answer:

I think it is a sorry if i'm wrong

Explanation:

why is Galileo Galilei impotant?

Answers

Answer:

He provided a number of scientific insights that laid the foundation for future scientists. He also improved telescope that helped further the understanding of the world and universe.

Explanation:

Answer:it’s because Galileo Galilei is pretty much the father of today’s modern science

Explanation:

I hope this helps :)

Can someone please answer these 2 for me :)) I WILL GIVE BRAINLISTTTTT

Answers

gold is the piece of metal which have larger mass.

Explanation:

because it is reactive in nature than copper

Gold
Because gold has a greater density than copper therefore 1 cm3 of gold is equal to a mass of 19.3 g while 1 cm3 of copper is 8.9 g

Which type of graph would best represent data from this experiment: Measuring the growth of a plant over 2 weeks? Question 1 options:
A. Line graph
B. Bar graph
C. Circle graph

Answers

The correct answer is A line graph
The answer is A. line graph :)

help please!!!!!!!!!!!!!!!!!!!!!!!!!!!

Answers

Im in the 10th grade and i got not a clue how to do this dawg

Answer:

HCl , Chocolate Milk , NaCl + H2O, Sand + H2O , Tea + Sugar

Explanation:

here the answer Deku

Cindy pours cool milk into a hot bowl of oatmeal and then stirs it with a room-temnperature spoon. Which substance will
have heat flow from it to the other substances?
O the milk
O the spoon
O the oatmeal
O the surrounding air

Answers

The spoon because metal is a good heat conductor.
it’s either A or B, i’d probably go with B though.

miss girl help- You may not have ever heard of the Inupiat, Inuvialuit, or the Gwich'in peoples, but where can you infer that they live?

Answers

Answer:

The Gwichʼin or Kutchin are an Athabaskan-speaking First Nations people of Canada and an Alaska Native people. They live in the northwestern part of North

Explanation:

ok so the question is Sort the processes based on the type of energy transfer they involve. condensation
freezing
deposition
sublimation
evaporation
melting and the catigoreies are thermal energy add or thermal energy removed.

Answers

Maybe evaporation???????????????

Answer:

Maybe evaporation and sublimation??????????????????????

Explanation:

In a chemical reaction, __________ are the substances present after the reaction.

Answers

Answer:

products

Explanation:

Explanation: Substances present BEFORE a reaction occurs are described as reactants. Substances present AFTER a reaction has occurred are described as products.

helpppp!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Answers

Answer:

A.

Explanation:

thnx for the brinliest

anybody wanna help?????

Answers

Answer:

straight line down then left and right that should be it

Explanation:

The bond between Hydrogen and Chlorine would be ???

Answers

Answer:

chlorine and hydrogen atoms form a single covalent bond. in hydrogen chloride gas because the electrons are shared, not transferred from one atom to another.

Need help with this.

Answers

The answer would be D!

Answer:

D

Explanation:

because it is changing to its own compound of chemicals.

Which statement best describes the message of the poem? *

It about icruas flight pls help and it is the poem not the myth

A Icarus flew too far for no good reason.
B Icarus learned something by flying too far.
C Icarus had a habit of flying too far.
D Icarus was excited by flying too far.

Answers

Can you include the pome pls

aaaaaaaaaaaaaaaaaaaaaaaaasssaaa

If all three metals were exposed to extremely high temperatures, which would be the last to melt?
(gold, mercury,copper)

I WILL GIVE BRAINLIST!!!

Answers

Copper would be the last to melt because it has the highest melting point!

Answer:

copper

Explanation:

because copper melts at 1,083

gold at 1 064

mercury at - 38

NEED HELP ASAP
I GIVE BRAINLY

Answers

Answer:

True, False, True, and False

Explanation:

1. False
2. True
3. True
4. False

I hope this helped :)

Help me out please? Thank you!

Answers

Answer: Continental climates are classified by whether that fluctuates a lot. Hot summer, Cold winters and Little rainfall are all characteristics of Continental Climates

Explanation:

First one because humidity, rainfall and cold are all characteristics of a continental zone.
Other Questions
select the correct answer which statement is true If a sprinkler waters 1 over 14 of a lawn in 1 over 2 hour, how much time will it take to water the entire lawn? 1 over 7 hour 4 over 7 hour 4 hours 7 hours Read this paragraph from Passage 2.There are also many costs involved in making movies that most people do not know about. There are the costs of the actors, directors, and all the other workers on the movie sets. The costs of the sets, locations, accommodations, and all the other things that are needed can also add up very quickly. Once the movie has been shot, there are many costs added in the editing process, especially if computer-assisted graphics are needed for the movie. Once the movie is ready to be released to the public, the costs increase even more. Advertising and promoting the movie, along with distributing the movie to the theaters can cost as much as the movie itself. All along the way, everyone involved in the movie is trying to make money and hoping that their movie will generate enough revenue to make a profit.Why did the author MOST likely include this paragraph in the passage?A to explain what goes into making a movieB to explain why movies cost so much to makeC to explain why producers need their movies to make a profitD to explain what steps movie makers go through to make movies Fred notices that all of his friend's brothers and sisters have dark hair. What is the most likely explanation for this characteristic? O They have identical genes. O They eat only healthy foods. O They live in the same environment. O They have parents with dark hair. If there are There are 914.4914.4914, point, 4 millimeters in a yard. There are 333 feet in a yard.How many millimeters are in a foot? There are 14 green crayons and 28 red crayons in a bin. What is the ratio of green crayons to red crayons in simplest form? Which is the best description of the cause of sound waves? * List three ways trade changed the world between 600 and 1500 AD. I need help on these questions please. will mark brainliest A sphere has a radius of 4 in. Which equation finds the volune of the sphere?Answers above on the picture^ thank you:) poem/song is it good enough for english class?when i said bye i expected to never see you againbut i pass by and you are there againand i can't say hi or greet you so i just take back my extended handand i wish that there was something i could say but dam.nwe were best friends and we told eachother everything we talked everyday and always said goodmorningwe asked how eachother were and held the other when the were mourningbut did you ever answer honestly to how are yaha three letter word was supposed to suffice i dare yah to try to get me to sum up my lifeand then be pleased when i say 'mhm' it was 'gud'and as if that didn't hurt you well i ask you to chosechose who, and when you dont dowell goodbye you. no i get it thoughi get it though it must've felt like another cold blowwhen you're living in the arctic driving snow and it must've frostbitmust've dimmed your glowwhen i said bye i expected to never see you againbut i pass by and you are there againand i can't say hi or greet you so i just take back my extended handand i wish that there was something i could say but dam.nnow i feel like saying a word would be a curseyou need space it would only make it worseand i hope you dont read this because i know you dont need thisbut its the only way i get things off my chest and if its poison y'know i cant let it restso i hope you can just do your best and i'll do mine toowhen i said bye i expected to never see you againbut i pass by and you are there againand i can't say hi or greet you so i just take back my extended handand i wish that there was something i could say but dam.ndam.n what is there to say everything was laid out so clearwhen i said bye i expected to never see you againbut i pass by and you are there againand i can't say hi or greet you so i just take back my extended handand i wish that there was something i could say but dam.n I can take medication that is prescribed to my parents because it is family.TrueFalse How many passes will it take to find the five in this list?1, 5, 10, 15, 20, 22, 303142 RNA interference (RNAI) is a mechanism of gene regulation in eukaryotes. RNAI is initiated by ____, which leads to the ____ of specific genes. Box 1: single-stranded RNAdouble-stranded RNAdouble-stranded DNABox 2:silencinginductionexpression How did the rulers/leaders of Mali gain stature among Arabic states? solve for "x" : 2x + 3x + 4x =36 Woodpeckers peck trees to find food and make nests. What would happen ifmost of the trees are cut down? What cash crop was important in the development of El Salvador's economy, history, and politics? cotton coffee tea coca Tenim tres resistors en srie, calcula la tensi que hi haur a cadascuna d'elles sabent que una d'elles s de 680 i les altres sn de 220 . El generador t una tensi de 12V. Given X = {15, 22, 33, 44, 89, 165, 1025} and Y = {-5, 15, 33, 88, 99, 150, 160, 1025}, which of the following statements is false? (X Y)X Y = {-5, 15, 22, 33, 44, 89, 99, 150, 160, 165, 1025}X Y = {15, 33, 1025}WHAT EVEN IS THIS LOL