Chemistry Middle School

can someone help me with it?

Can Someone Help Me With It?

Answers

Answer 1
I think it is a aswell
Answer 2
The third option is the answer I think

Related Questions

What evidence do scientists have to support the big bang theory as the origin of the universe?

Answers

Explanation:

Two major scientific discoveries provide strong support for the Big Bang theory: • Hubble's discovery in the 1920s of a relationship between a galaxy's distance from Earth and its speed; and • the discovery in the 1960s of cosmic microwave background radiation.

Answer:

Hubble's discovery in the 1920s of a relationship between a galaxy's distance from Earth and its speed; and • the discovery in the 1960s of cosmic microwave background radiation.

Explanation:

Which statement describes the nutrient cycle?
the movement of nutrients within all soil layers that allow plants to grow and seeds to germinate
the movement of nutrients from the physical environment into living organisms and back again
the movement of the three non-mineral nutrients that are absorbed through the soil
the movement of nutrients within plants that allows them to conduct photosynthesis

Answers

Answer:

This Soils and Plant Nutrients Chapter from the Extension Gardener Handbook examines the physical and chemical properties of soil

Answer:

i have no clue tell me

Explanation:

Which statement describes the nutrient cycle?

the movement of the three non-mineral nutrients that are absorbed through the soil

the movement of nutrients within all soil layers that allow plants to grow and seeds to germinate

the movement of nutrients within plants that allows them to conduct photosynthesis

the movement of nutrients from the physical environment into living organisms and back again

can someone help me with it?

Answers

Answer:

low average wind speeds

Answer:

Honestly, I think its the first one, many turbines

Isabel pushes a toy car, giving it kinetic energy. When this happens, what happens to the energy in her arm?

A) The energy in her arm increases.

B) The energy in her arm is destroyed.

C) The energy in her arm decreases.

D) The energy in her arm stays the same.

Answers

Answer:

c the energy in her arn decrease

C the energy in her arms decreases. if you think about it, after you push something your arm will slow down during the push even if it is something that is lightweight. it causes you to exert more energy which would decrease the amount left in your arm.

Answer as many as you'd like (Please write the number of the one you answer)

Unit 5 - Chemical Reactions

Chemical Change/Law of Conservation

1. What is the law of conservation of mass?



Observing Chemical Change

2. How can Changes in Matter Be Described?



3. How do you identify a chemical reaction?



Describing Chemical Reactions

4. What information does a chemical equation contain?



5. How is mass conserved during a chemical reaction?



6. What are three types of chemical reactions?


Controlling Chemical Reactions

7. How do reactions get started?



8. What affects the rate of a chemical reaction?

Answers

Answer:

1. The law of conservation of mass states that in a chemical reaction mass is neither created nor destroyed. For example, the carbon atom in coal becomes carbon dioxide when it is burned. The carbon atom changes from a solid structure to gas but its mass does not change.

2. There are two types of change in the matter: physical change and chemical change.

3.  Change in the arrangement of Chemicals

4. A  chemical equation consists of the chemical formulas of the reactants (on the left) and the products (on the right). The two are separated by an arrow symbol (read aloud as yields). Each individual substance's chemical formula is separated from others by a plus sign.

5 During the rearrangement of atoms mass is conserved unless u add more substances

6. synthesis, decomposition, combustion,

Explanation:

I hope this helps, I don't remember the exact answers,

1.(when you say mass I think matter) The law of matter states matter can’t be created nor destroyed. An example of this could be the rock cycle. The carbon goes into a volcano becomes lava. Then the volcano explodes the rock ends up in a river and becomes a metamorphic rock after lots of pressure in the river. Then erosion moves the rock and the rock becomes a tiny sediment. It’s so tiny flys in the air then goes back in the volcano becomes a carbon then it can go elsewhere. It can also go through the same process again.

3. A chemical reaction is very different from a physical reaction.Chemical changes rearranged their molecules to make a new substance that is not undo able. One way you can identify them is if they have a gas reaction. A gas reaction is something you can’t undo because it arranged it’s particles into that reaction and gas molecules become carbon molecules in the air. Another way you can find a chemical reaction is seeing a temp change for example food. Once you make a cake you can’t Un bake it.

7. I believe reactions happen because something has effected the thing/object to make it react to it.

can someone help me with it??

Answers

Answer:

C. Kinetic Energy

Explanation:

It should be option three

Which statement about living things and their environment is true?

Answers

Answer:

Which statement about living things is true?

All living things are made of cells, use energy, respond to stimuli, grow and reproduce, and maintain homeostasis

Explanation:

Answer:

cells, use energy, respond to stimuli, grow and reproduce, and maintain homeostasis

Explanation:

Remember, Resistance = Voltage/Current

How much resistance allows a 6 V battery to produce a current of 0.006 A?


a.) 1000 ohms
b.) .036 ohms
c.) 100 ohms
d.) 0.36 ohms

Answers

A) 1000 Ohms

This question is asking us to find the resistance (Ohms) of a circuit. 6V/0.006A = 1000 Ohms. :)

Follow these steps:

Carefully measure out 3 Tablespoons of cold water into the jar.

Now measure out 1/8 teaspoon of salt and put it into the jar with the water. Put the lid on the container and shake it. Keep shaking until the salt is completely dissolved. To determine whether it has completely dissolved, hold the container up to the light and look carefully at the bottom, or open the lid and look into it. If you see little grains of salt there, it is not completely dissolved, so keep shaking until it looks the same each time you look.

If the salt does not dissolve completely after five minutes of vigorous shaking, write this in your notebook and go on to step 4. If the salt dissolves completely, add another 1/8 teaspoon of salt and repeat the process. Repeat over and over, keeping track of how many 1/8 teaspoons you add. Stop when you can’t get the salt to dissolve no matter how hard or long you shake the container.

Record how much salt you were able to dissolve in the 3 Tablespoons of water in the solubility data table.

Repeat steps 1-4, but this time using very warm or hot water. Before you do it, run the jar under hot water to warm it up so the water doesn’t cool off right away. Be sure to use the same amounts of water and salt as you did the first time. The only variable should be the temperature of the water.

Record your results, and then compare them with your previous results.
Were there any differences in the amount of salt that dissolved in the warm water versus the cold water?

Answers

Answer:

Alot of salt dissolved in warm water than in cold water

Explanation:

This is because cold water does  not dissolve alot of salt and hot water dissolves alot of salt because of the kinetic energy acting on the liquid

(GIVING BRAINLYIST) How does temperature and precipitation change as you increase in elevation?

Temperature gets warmer and precipitation increases.
Temperature gets cooler and precipitation increases.
Temperature gets warmer and precipitation decreases.
Temperature gets cooler and precipitation decreases.

Answers

Answer:

Temperature gets cooler and precipitation increases.

Explanation:

As average temperatures at the Earth's surface rise, more evaporation occurs, which, in turn, increases overall precipitation. … In addition, higher temperatures lead to more evaporation, so increased precipitation will not necessarily increase the amount of water available for drinking, irrigation, and industry

Higher elevations cause temperatures to drop because the higher up in the atmosphere you go, the colder it gets due to air pressure, in turn causing precipitation to freeze, creating snow. Lower elevations are a lot warmer because the air pressure is not as pressurized causing the temperature to be warmer

Answer:

Temperature gets colder and precipitation decreases

Explanation:

You move farther away from the very hot core of the earth, and your going above the clouds so no rain

How was sending your light and sound messages similar to the way that digital messages are sent?

Answers

Answer:

Morse code can communicate letters and numbers using light or sound. Sailors on ships can flash lights using Morse code to send messages from one ship to another. Morse code is a way to communicate over distances. Morse code can communicate letters and numbers using light or sound.

Please help its also urgent ( I have 7 more questions)

Answers

Answer:

The answer is D) High Temperature and Little Rainfall

Explanation:

Answer:

ITS D

Explanation:

ITS d i hope this helps you

one spoonful of drink crystals has a mass of about 4g. Calculate the mass of the crystals that dissolved in 100mL of water to form a saturated solution

Answers

Answer:

We want Concentration=Mass of solute100 mL volume of solvent . We make the reasonable assumption that the volume of solution is equal to 40⋅mL

PLEASE help
Which of these factors play a role in creating weather conditions

Question 7 options:

temperature


humidity


air pressure


wind


all of these

Answers

Answer:

All of the above

Explanation:

I'm no expert but it looks like all of those would affect weather somehow

I’ve done some research and come to a conclusion that all of the above would create a role in creating weather conditions

Please help this is the last question

Answers

Answer:

Hummingbirds are attracted to bright colors.

Explanation:

Because they have a greater concentration of cone cells in the retina of their eyes making them sight bright colors more clearly and vibrantly.

Hummingbird are attracted to bright colors

Neutron stars are incredibly dense. Describe a neutron star in terms of a sugar cube.

Answers

neutron star, any of a class of extremely dense, compact stars thought to be composed primarily of neutrons. Neutron stars are typically about 20 km (12 miles) in diameter. Their masses range between 1.18 and 1.97 times that of the Sun, but most are 1.35 times that of the Sun.

PLEASE HELP! Punnett Square Practice Fill out each Punnett square based on the information in the problem. Then write in the phenotype for each genotype and the probability of its occurrence. Let's do the first one together. (Pictures of questions linked below)

Answers

I attached the edited photos

Please help 20 points!
What is the thermocline?

Question 10 options:

a slope in the ocean


an instrument for measuring temperature in the ocean


a zone of rapid temperature change between the warm surface waters and the cooler deep waters


the warmer upper layer of the ocean

Answers

“A zone of rapid temperature change between the warm surface waters and the cooler deep waters” answer C

Good luck :)
Answer c if that’s the answer you are looking for :)

what can you add to play-doh to make it strech

Answers

Answer:

Cornflower or Cornstarch

Cornflower or Cornstarch. These substances make the play-doh softer slowing it to stretch. Hope it helps.

8. How many of the substances listed in the table will float in liquid water if the water has a density of 1g/cm3?

A. none
B. three
C. two
D. one

Answers

The correct answer is A as if something has bigger density it will sink in water ;)
Answer:A

Explanation: If the density is higher than 1 it means it’s more dense than water and will sink

CAN SOMEONE ANSWER THIS QUICKLY, PLEASE
Review this temperature anomaly chart, for the World, from Dec 15, 2008- Jan 15, 2022. What trend do you see?


Question 3 options:


The overall temperature around the world has remained constant.



The overall temperature around the world has a .5 degree increased.



The overall temperature around the world has a .5 degree decreased.



The overall temperature around the world has a .15 degree decreased.

Answers

can you go into more detail pls?

The overall temperature around the world has a .15 degree decreased.                            i just did all three times and this is the one that i did not choes and i got a 75% all times

One city is located north of the equator and experiences average rainfall and warm temperatures. Another city is located exactly the same distance from the equator, but south. How will these two climate areas be the same or different?

The temperature and precipitation will both differ.
The temperature and precipitation will be similar.
The temperature will differ but the precipitation will be the same.
The precipitation will differ but the temperature will be the same.

Answers

Answer:

Temperature gets warmer and precipitation increases

Explanation:

...pretty sure i researched it to verify

Answer: It's is not c or d

Explanation: I can not find the correct answer it will differ between A and B



SORRY I COULDN'T HELP MORE

1. Are all responses to the environment immediately obvious? Be specific and explain your reasoning.
2. Explain the concept of homeostasis. Give an example.
3. At what level does life evolve?

Answers

homeostasis means "steady state". Homeostasis describes how the body regulates its process to keep its internal conditions as stable as possible. Homeostasis is necessary because human cells are efficient but very demanding.

Yes because that is the 3

Help me please??????? :/

Answers

Compression: A
Rarefaction: B
Wavelength: C
1. A
2. B
3. C

yw !!!

Isabel pushes a toy car, giving it kinetic energy. When this happens, what happens to the energy in her arm?
A) The energy in her arm increases.

B) The energy in her arm is destroyed.

C) The energy in her arm decreases.

D) The energy in her arm stays the same.

Answers

Answer:

c the energy in her arm decrease

Answer:

it's either C or D try C

srry if im wrong

i need help with this

Answers

Answer:

Search up Cell Divison Reinforcement key and it pops up

Explanation:

Literally took 30 seconds to find online or individually ask every question.

search up key, it’s right there lol. for others, research it

How can a chemical reaction be sped up?

Select from the drop-down menu to correctly complete the statement.

Increase the

A.) Catalyst

B.) Concentration

C.) Surface Area

D.) Temperature

to allow the reaction to happen with more energy.

Answers

Answer:

Temperature i think

Explanation:

Answer:

A catalyst

Explanation:

Gravity is also affected by mass.which is the amount of matter in an object. As the amount of mass increases, the force of gravity

Answers

Answer:

As the amount of mass increases, the force of gravity INCREASE.

Explanation:

"Increases"
The more mass, the greater the force of gravity.

If you Guess my brother name I will let you know if you are correct or not:

A. Da`Shaun
B.Ja`Quan
C.Alfredrick
D.Christopher
E.Ja`Kuan
F.Ja`corn​

Answers

Answer:

B

Explanation:

I think b is the right answer

Have an amazing day!!

PLEASE RATE AND MARK BRAINLIEST!!

Answer:

A

Explanation:

B

C

D

E

F

i need help with this

Answers

1. is prophase, chromatid in the nuclear envelope disappears2. metaphase, all the genetic material is condensing into chromosomes 3. anaphase, chromosomes move to opposite sides of the circle 4. telophase, the final phase two nuclei are formed
Other Questions
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Whom does Catherine want to hire for the childbirth?A.urologistB.gynecologistC.an obstetricianD.a mid wifeE. a nurse Which of the following is a factor of the expression 24x^2-30x-9?Group of answer choices12x+14x-32x+34x+1 someone can help me please ANSWER ME PROPERLY AND GET BRAINLIEST you can edit and answer in any way you like but the answer must be correctExamine the Hierarchy of needs below with an example When the color of the light changes, the number of light red kidney beans will also change Write a hypothesis about the effect of the red light on the population. Use the "if . . . then . . . because . . ." format, and be sure to answer the lesson question: "How does natural selection change the phenotypes within a population over time?" Please help me How do water particles in a wave move?Question 2 options:In a circular motion.In a straight line with the wave.They do not move.They move backwards. the original price of a dress is 350.00. it is sale on for 30% off. which of the following is the new price of dress? a.105 b.245 c.380 d.455 plss help ...................... The activities of the federal reserve board have the most direct influence on. Balance the equation: ___Li3N + ___NH4NO3 -> ___LiNO3 + ___ (NH4)3NWhat type of reaction is the one above? How much kinetic energy does a 2kg object have if it is traveling at a velocity of 2m/s? Escucha y completaListen to Ana describe herself, her family, and her friends. Then write the word or phrase that best completes each sentence.Show Audio TestQu tal estn? Mucho gusto. Yo soy Ana Rivera. Tengo quince aos. Mis padres se llaman Adriana y Diego. Ellos son interesantes. Mis abuelos son Elena y Carlos. Ellos son mayores y viven con nosotros. Tengo una mascota. Es un perro, y es atrevido. Hoy es mi fiesta de quince aos y estoy emocionada. Mis amigos estn en mi quinceaera. Son simpticos. Roberto es alto y moreno, y Griselda es baja y rubia. Ellos estn muy contentos. Berta y Rosa son rubias y estn nerviosas. Vicente est triste. l no est en la fiesta. Hasta pronto!1. Ana tiene aos.2. de Ana viven con ella y sus padres.3.La mascota de Ana es un4.Griselda est muy 5.Berta y Rosa son Factor completely.x214x+48 I need help with my essay on the conclusion "The Masque of the Red Death"QUESTION 3: Some people argue that the masked ball is just a dream. Which of thefollowing phrases would support that argument?a. "His conceptions glowed with barbaric lustre. "b. "A light laughter at once pervaded the assembly. "C. "Its pendulum swung to and fro with a dull, heavy, monotonous clang. "d. "It was a gay and magnificent revel. " With both feet flat on the floor, taking tiny Slide steps is a step pattern of what dance steps? A. shuffling steps B. contraganza step C. change step D. habanera step Find a basic dress pattern online. For this exercise, choose a simple design that you could add elements to. Then, go to your local fabric or sewing store and price out what you would need to make three different versions of the dress using the listing on the pattern as a guideline. You can also price materials online.Create one version of the dress that is as inexpensive as you can make it. Checking the bargain bin or sale rack might help you create the dress very cheaply. List the cost of each item and where you found it (i.e. internet, local store, etc.). In a paragraph, describe the version of the dress that you can create for as little cost as possible and how you kept costs down.Next, choose a moderate version of the dressuse a nicer fabric, add some accessories, make the dress longer, etc. Price out your slightly enhanced version of the dress. List the cost of each item and where you found it (i.e. internet, local store, etc.). In a paragraph, explain the choices you made when thinking about how to improve it based on the low-cost version.Finally, design the upscale version of the dress. Here you can be creative and build the nicest version of the dress you can imagine. You can also include additional accessories or alter the design for this version. List the cost of each item and where you found it (i.e. internet, local store, etc.).When you are done, write a paragraph that explains the choices you made and how they impacted the cost.When you have priced out three distinct versions, write a paragraph explaining which you would choose if you had been tasked to mass produce the dress for a wide market. Explain why you feel that the dress would sell and suggest a price. Remember, labor is going to be a cost as well. This can be complicated to calculate, so for these purposes assume that it will be 30 percent of the cost of materials. Price the dress as if you wanted a profit of 20 percent. So, if your materials cost $50, you would need to add $15 (30 percent), making the cost of production $65. A 20-percent profit would require an additional $13, making the total cost of the dress $78. Once you have calculated the cost of the dress, explain where you would sell the dress, who your target audience would be, and where one could wear the dress.