Chemistry Middle School

When balancing a chemical equation, which of the following are you allowed to do?

Take away substances

Add coefficients

Change subscripts

Add new substances

Answers

Answer 1
You are only allowed to Add coefficients
Answer 2

Answer:

Add Coefficients

Explanation:

You CAN'T change the identity of an element or substance in an equation. You can only change coefficients.

Related Questions

In your words, explain why water is higher salinity is denser than water with a lower salinity?

Answers

Because it matters on how much salt dissolves, which when there’s more salt there’s more salinity. When comparing 2 cups of water, the waiter with higher salinity has more mass so it’d be more dense!

A student made peanut butter bars by pressing a layer of graham cracker crumbs into a baking pan. Next, the student added a layer of a peanut butter mixture and then added a layer of crushed peanuts. Lastly, the student added a layer of chocolate frosting.

The process of making peanut butter bars is most like the formation of what type of rock?

Igneous

Metamorphic

Sedimentary

Magma

Answers

Answer:

i am pretty shure it is c soooo sorry if i wroung

Explanation:

It’s sedimentary, which is formed by compressing layers of sediment.

Igneous comes from volcanoes
Metamorphic start as one kind of rock, then change to another
Magma is like igneous

A ______________________is a group of stars that has been given a name to help us find certain stars or recognize them

a
cluster
b
gaggle
c
constellation
d
flock

Answers

Answer:

It is c

Explanation:

Because a constellation is a group of stars with names

Answer is c because it just is

Gravitational potential energy is energy due to


being in motion


being on the ground


height above ground


doing work

Answers

Answer:

being on the ground

Explanation:

Answer:

Gravitational potential energy in terms of work done against gravity. ... We define this to be the gravitational potential energy (PEg) put into (or ... Figure 2. The change in gravitational potential energy (ΔPEg) between points A and B

Explanation:

hope this helps

Land bridges across oceans are used to connect all continents on earth.
A.true
B.false

Answers

Answer:

"A. True", is the right answer.

I’m going with him I believe it’s true

Infer How do you think these bones are involved in a whale’s movement?

Answers

I think that the bones involved in a whales movement help there tail move so they can swim
By keeping the muscle from flailing around and add support and stability when it moves its body,

Ocean floor evidence (magnetic stripes and rock samples).
A.true
B.false

Answers

Answer :

A. true

Explanation:
Ocean floor evidence includes molten materials, magnetic stripes, and the ages of rocks themselves from drilling samples of rocks
a. true, Oceanic drilling by the Glomar Challenger between 1968 and 1983 produced the first accurate data of seafloor age. Glomar Challenger data showed a clear progression of increasing age with distance from the mid-ocean ridge. Sediment next to the ridge was youngest.

plz help .....................

Answers

Answer:

1. conduction

2. radiation

3.convection

4. conduction?

5. radiation

6. convection

7. convection

8. convection

9. radiation

10.radiation

(sorry if they aren't all correct)

Is the process of making a glass of lemonade a physical or chemical change?? Explain.

Answers

Physical I think

Explanation:
——> A physical change

Explanation: Making lemonade is a physical change, because things are dissolving, lemons cut up, etc. But there are not any covalent chemical bonds made or broken.

Choose all the answers that apply.

Conduction _____.

is the transfer of heat in fluids
requires physical contact between molecules
is the transfer of heat in solids
happens because molecules cause each other to vibrate

Answers

happens because molecules cause eachother to vibrate
happens because molecules cause each other to vibrate

Fossils of tropical plants have been found in extremely cold regions.
A.true
B.false

Answers

false because they would freeeze
I think false it would have been gone by doing that

plz help me on the other two :) i already did the third one

Answers

Energy is lost because only a certain amount of energy is transferred through each trophic level
As you more up to the top of energy pyramids , energy is lost due to things such as excretion

How many different elements are involved in the reaction shown? Record the answer in the grid. Plz help :))

Answers

Ca=Calcium

Ci=Iron

Ag= Silver

No-Nobelium

can someone make me a lab report? Please......... Objective(s): In your own words, what was the purpose of this lab? Hypothesis: In this section, include the if/then statements for your lab. These statements reflect your predicted outcomes for the experiment. Procedure: In your own words, summarize the steps you took to complete your lab. Data: Data tables and graphs should be included in this section. Conclusion: Your conclusion will include a summary and an interpretation of the data results.

Answers

Answer:

When i used baking soda and water whith hydro-oxide it made elephant -toothpaste

Explanation:

hope this helped!

Need help with 7th grade science
Help ASAP
What are some of the raw materials that are used in making T-shirts. (Except cotton)
Raw materials: a material that is made by/in nature/earth. Example mine materials, nature materials (tree/grass)

Answers

Answer:

Cotton, polyester, and pima

Explanation:

T-shirts are generally made of a stretchy, light and inexpensive fabric and are easy to clean. Typically made of cotton textile in a stockinette or jersey knit, it has a distinctively pliable texture compared to shirts made of woven cloth.

Which three temperature readings all mean the same thing?


273 Kelvin, 100 degrees Celsius, 212 degrees Fahrenheit

100 Kelvin, 0 degrees Celsius, 32 degrees Fahrenheit

273 Kelvin, 0 degrees Celsius, 212 degrees Fahrenheit

373 Kelvin, 100 degrees Celsius, 212 degrees Fahrenheit

Someone please help!

Answers

The last one is correct :)

Answer:

273 Kelvin, 0 degrees Celsius, 32 degrees Fahrenheit

Explanation:

what papper that does not get wet do NOT USE the G O O G L E if u did u lose but try and I'll tell u
- Expermint get a cup put water then put papper on top any papper in the cup then filp it over in the sink What happens... if ur papper not wet and water did not sink through u win but tell me what happens to urs

Answers

Answer:

Stone Paper, known since I was a kid.

Explanation:

Answer:

Explanation:

Da papper

Please help me I will give you extra points and the brain thing please actually do it.

Explain in your own words, what is Inertia?

Answers

inertia is the retaliation of an object to change in its velocity

Which of the following compounds contains twice as many carbon atoms as oxygen atoms?
Plz help :)

Answers

Answer 2 =C2 H6 O11 i hope that help

How does the equation below support the idea that matter is not created or destoryed?

6H2O + 6CO2 -----> C6H12O6+ 6O2

Answers

Answer:

the numbers all stay the same, just distributed

Explanation:

theres still only 6 c. 12 h. and the same amount o

Answer:

its us air

Explanation:

bc u said ha

Please answer
Which describes sand?

fine-grained
retains water
water drains quickly
good for growing crops


-KUBAN

Answers

Answer:

c

Explanation:

What are the 3 most important ecosystem services of a coral reef
1: Home to housands of species of fish, plants, and turtles

2: Corals provide treatments to human illnesses.

3: Reduces wave energy and helps protect against tsunamis

4: Heats up the planet.

5: Provides a good source of tacos.

Answers

2 Corsls provide treatments
1. Home to thousands of species of fish plants and turtles
2. Corals provide treatments to human illnesses
3. Reduces wave energy and helps protect against tsunamis
The other two answers aren’t true and don’t make sense

which of molecules do u get from food

Answers

Answer:

carbohydrates, proteins and fats.Explanation:

Answer:

Explanation:

Instead, let's start applying what we learned so far by looking at the most common groups of molecules in food: carbohydrates, proteins and fats. These molecules are also called 'macronutrients' and are essential for us from a nutritional point of view.

HurryPlant species rely on various methods of seed dispersal. Which type of seed dispersal would most likely be used by the organism shown in the diagram? Animal dispersal Wind dispersal Water dispersal Gravity dispersal

Answers

The answer is ANIMAL DISPERSAL

Answer: animal dispersal

Explanation:

The formation of hurricanes, cyclones, and typhoons
A.true
B.false

Answers

True homie Bc I said it was
I say true aswell cause it makes sense

What kinds of changes happen to water as it goes through the water cycle? Are they physical or chemical?

Answers

Answer:

When water changes state in the water cycle, the total number of water particles remains the same. The changes of state include melting, sublimation, evaporation, freezing, condensation, and deposition. All changes of state involve the transfer of energy.

Explanation:

and its physical

Answer:

The answer is Physical

Explanation:

The changes of state include melting, sublimation, evaporation, freezing, condensation, and deposition. All changes of state involve the transfer of energy. They are all the same but no matter what state it's in it's still water so it's physical.

help now NOW NOW NNNOOOWWW, please

Answers

The answer is c i now this stuff

What flows directly into the ocean? *
A. Glaciers, heat, and water
B. Glaciers, Rivers, and Groundwater
C. Glaciers, sewers, and helium
D. None of the above

Answers

the answer is A. (glaciers, heat and water)
The person above is right :)

Which of the water alternative energy source has an energy transfer chain of GPE-->KE-->EE?

Answers

Um what’s the question?
Elastic Potential Energy. Uses Gravitational potential energy, kinetic energy and EE.

How many more oxygen atoms are in Na2HPO4H(disodium phosphate) then in 2H3PO(Phosphoric Acid)?

Answers

Answer:

in disodium phosphate = 4 oxygen atoms

in phosphoric acid = 1 oxygen atom

Answer: There are 3 more oxygen atoms in Na2HPO4H than 2H3PO

Explanation:

There are 4 oxygen atoms in Na2HPO4H and 1 in 2H3PO. You subtract 4 - 1 =3

Other Questions
10. Maltase 11. Peptidase 12. Phospholipase 13. Polymerase 14. Ribonuclease 15. Sucrase Look at the list of Enzymes provided. Decide which substances are affected by these enzymes. The invasion of which country by Germany began World War II?A.) CzechoslovakiaB.) AustriaC.) BritainD.) Poland What features of gothic literature does the excerptinclude? Check all that apply.a focus on fear and horroran exploratign of strong emotionsa reliance on mystery and suspensean inclusion of supernatural creaturesa showing of supernatural events Brandon opened a checking account with $125 and deposits $25 into it every week. He opened another account with $225 and deposits $35 into it every week. a. Write a simplified expression to represent how much he will have in both accounts after w weeks. b. After 15 weeks, how much money will he have? can someone help me with this problem? -9.32 x 10^-? put it in standard form. Describe your morning routine to get ready for school.Explain in 10 or 12 sentences! PLZ HELP ME THIS IS 7th GRADE MATH i will give u the brainliest i need the answer with the steps .pls abswer soon The Munich Pact, agreed to in the 1930s, favored A. Germany B. England C. USSR I need major help Ill give u brainlest On a cold winter day, the temperature in minimal was 12 degrees below zero. On the same day, the temperature in Anchorage was-21 Degrees below zero. In which city was it colder? Explain how you know...Please help Pls I need help ASAP Karen owns stock in an industry that includes a few large businesses thatdominate the market. What type of market structure best describes herbusiness?A. An oligopolyB. A conglomerateC. An entrepreneurshipD. A subsidiary What is the coefficient of the variable in the following expression? 6w + 8 Complete the following crossword puzzle with words related to downtown and its all gonna be in Spanish Horizontales5. La oficina est en un (blank) grande.6. Hay muchos edificios en el (blank)7. El concierto de rock va a ser en la (blank)8. Una (blank)es una calle grande. Verticales1. Vamos al (blank) de arte.2. El actor est en el (blank) 3. La (blank) de Mxico es grande.4. Voy a la (blank) porque necesito ropa nueva.6. Los carro van por la (blank). When a wave hits an object,energy from the wave is both absorbed and reflected off the object A. TrueB. False P.S pls help why does random error affects precision? 10 pointsElizabeth was cleaning her purse on Monday. She discovered $4.60 in the bottom of her purse. The coins were only dimes and nickels. She had a total of 49 coinsand solve a system of equations to determine how many of each coin Elizabeth has.1 Drag ni Drop here or BrowseI PLEASE PLEASE HELP THANKS SO MUCH This planet is about the size of Earth. It has a very thick atmosphere witha lot of gases. The surface temperatures and pressures are extremelyhigh.Which planet does this describe?