Chemistry Middle School

I dont understand this question can u guys help

Answers

Answer 1

Answer: B

bye

Explanation:

Answer 2

I think the 4th one

Related Questions

1.a)How many types of particles are formed when a strong alkali is dissolved in water??

b)Identify those particles.

Answers

Answer:

I didn't know how to explane it

but this should help you get your answer

1.a)How many types of particles are formed when a strong alkali is dissolved in water??b)Identify those

An alkali is a substance that produces [ hydroxide ions ] , [OH -(aq) ]
when dissolved in water

The rabbit habitat in this graph has enough water to support 94 rabbits, shelter will support 85 rabbits, and there is enough food for 66 rabbits.

Answers

Answer:

85 rabbits is the carrying capacity

Explanation:

I believe it is 85 rabbita because the shelter ITSELF is able to carry/support 85 rabbits.

Should be 85, the shelter will support 85 rabbits and the 94 for water and 66 for food doesnt so much in this, carrying capacity is 85!

Plz help... idk wut to do!!!!!!!!

Answers

Observation: The man is walking his dog.

Interference: The dog must have saw something and started chasing after it, resulting in the owner being dragged along.

Observation: The man is walking his dog.

Interference: The dog must have saw something and started chasing after it, resulting in the owner being dragged along.

HOPE IT HELPS

Match each letter with the correct label. Use the atom diagram below.

Electron - Nucleus - Proton - Neutron

Answers

D= nucleus
C= protons
B= neutron
A= electron

Answer:

Explanation: First and foremost, we must carefully examine the provided diagram in order to properly name the sections of an atom diagram.

Step-by-step instructions are given along with the answers in sequential sequence.

Correct answer for (A) is Electron since they are present at the outermost shell of an atom.The correct answer for (B) is Neutron since it is the central element of an atom.The proton is the right answer for (C), as it is included in the nucleus grouping with the neutron.The nucleus is the correct option for (D) since it is the primary component of the atom and includes both protons and neutrons.

Learn more about the Atom here:

https://brainly.com/question/12578802

Element X has a nucleon (mass) number of 19 and a proton (atomic) number of 9. Which group does X belong in? Choose one of the following and explain the answer.

a) I b) III c) VII d) 0

Answers

Answer:

Explanation:

Flourine has

9 protons

9 electrons

10 neutrons

this makes the atomic number 9 and the atomic weight 19.

hope it helps

Element X has a nucleon (mass) number of 19 and a proton (atomic) number of 9. Which group does X belong

C the is no other explanation but that trust me

Cacti have thick stems with lots of sharp spines. How do the spines help the cactus survive?

They allow the cactus to capture more sunlight.
They help the cactus grow taller stems.
They help the cactus produce colorful flowers.
They protect the cactus from being eaten by animals.

Answers

I believe it’s the last one: They protect the cactus from being eaten by animals

Answer:

D) They protect the cactus from being eaten by animals.

Explanation:

Cacti have thick stems to keep the animals away.

Wind is caused by differences in elevation.

True
or
False

Answers

Answer:

false

Explanation:

I think the answer is false

8. Which is electrically attracted to positively-charged particles in an atom?
A) neutrons
B) electrons
C) protons
D) nucleus

Answers

Answer:

Electrons

Explanation:

Since electrons have a negative charge, they would attract to the proton to cancel out the charge.

Write a lab report on the lab ¨How do the process of conduction, convection, and radiation help distribute energy on earth.¨ for edge 1. Purpose- state the purpose of the lab.
2. Hypothesis- (Use if, then, because in your statement)
3. Materials- list all materials used in the lab
4. Procedures- state step by step what is being done in the lab
5. Observation/data- state what is being measured
6. Analysis/conclusion-state by summing up what was done in the lab and evaluate your
hypothesis with what actually happened

Answers

Answer: The sections of a lab report can vary between scientific fields and course requirements, but they usually contain the purpose, methods, and findings of a lab experiment. Each section of a lab report has its own purpose. 1. Title: expresses the topic of your study 2. Abstract: summarizes your research aims, methods, results, and conclusions

Explanation:

Compare a heterogeneous mixture and a homogeneous mixture.

Answers

Answer:

A homogeneous mixture has the same uniform appearance and composition throughout. A heterogeneous mixture consists of visibly different substances or phases. The three phases or states of matter are gas, liquid, and solid.

Explanation:

Hope you will like it

Can you guys help me solve this?

Answers

Answer:

Ghethan,Haylei,Liam

Explanation:

Liam

Haylei

Ghethan

I think that's the answer they're going for.^

Ghethan Hayley Liam

help please i dont know how to do this

Answers

I’m gonna assume the answer is b

I think the answer is b

Imagine that you have just made a fresh apple pie. When you take it out of the oven, it is so hot, you can't even hold it in your hand; so you place it on the kitchen table. Now, several minutes later, you are able to cut a slice and eat it. The apple pie has cooled, the question now is, where has the heat gone? Select which of the following below is most likely to have occurred and provide a well developed, written explanation for your response using scientific principles learned in class.

Answers

Answer:

Radiation (I think)

Explanation:

The electromagnetic radiation emitted from the source carries heat energy away from the source to surroundings, the infrared or electromagnetic waves escape from the hot apple pie through radiation into the surrounding air.

How many moles are there in 15. 0 grams of SiO2?

a

0. 170 mol

b 0. 340 mol

c 0. 534 mol

d 0. 250 mol

e 0. 208 mol

Check it

Answers

Answer:

d) 0.250 mol

Explanation:

15.0 grams of sio2 have 1/4 moles.

The answer for the question you have asked is: 0.25

What is NOT true about genes and chromosomes?

Genese are located on chromosomes

Chromosomes are in the nucleus

A single chromosome can contain hundreds of genes

All of these are true

Answers

Let us go option by option :

1) Genes are located in chromosomes. TRUE

Chromosomes are in cell nucleus. A chromosome contains hundreds and thousands of genes. A normal have 23 pairs of chromosomes, and a total of 46.

2) Chromosomes are the in nucleus.

TRUE

Chromosome is structure found in nucleus of the cell. It is made up of protein and DNA.

3) A single Chromosome can contain hundreds of genes.

TRUE

single Chromosome can contain hundreds of tgenes.

4) All of the above

TRUE

As all the statements above are true. The correct option is 4.

Answer:

all of them are true

Explanation:

this is because chromosomes contain genetic materials and it is present in the nucleus.
Therefore, the correct option is 4) all of these are true

no problem

Karissa is conducting an experiment on the amount of salt that dissolves in water at different temperatures. She repeats her tests several times using the same procedure.

What can Karissa do to further increase confidence in the results of her experiment?

1) have another scientist run the same exact procedure in her lab.
2) include several other liquids for comparison.
3) calculate the average amount of salt that dissolves to summarize findings.
4) make sure the experiment follows a specific procedure that allows other scientists to produce the same findings.

Answers

Answer:

I think its 3

Explanation:

I’m pretty sure it’s 3

Check the box of any item below that can be categorized as matter.

gravity

magnetic force

heat

sunlight

air

molecules of salt

atoms

chocolate cake

freedom

cells

steam

magnets

Answers

molecules of salt, atoms, chocolate cake, cells, magnets

piece of roasted salted fish is put in a mouse trap. explainwhy the mouse comes to the trap

Answers

the mouse could have been scavenging for food and thought that it found some. It would unexpectedly walk into the trap because of how desperate it is for food, especially with suspected predators around.

Answer: Food

Explanation:

The rat smells the food or sees the food it goes towards the food to eat it.

Which organism in the food chain has created food from the energy in sunlight?

A
krill

B
phytoplankton

C
leopard seal

D
Antarctic herring

Answers

Answer:

b hope I am right if not I am so sorry

Explanation:

how many joules would it take to raise 2 grams of AL 1 degree?

Answers

Explanation:

Air has a heat capacity of about 700 Joules per kg per °K and a density of just 1.2 kg/m3, so its initial energy would be 700 x 1 x 1.2 x 293 = 246,120 Joules

Which of Newton’s Laws of Motion is represented in the following description: The worker complaining because the box was too heavy to move. He could not apply enough force to move it.

1st Law of Motion
2nd Law of Motion
3rd Law of Motion

Answers

Answer:

In the first law, an object will not change its motion unless a force acts on it. In the second law, the force on an object is equal to its mass times its acceleration. In the third law, when two objects interact, they apply forces to each other of equal magnitude and opposite direction.

Explanation:

3rd law of motion is what is represented

If a substance has a density of 19 g/cm3, then what is the mass of 8 cm3 of this substance?

Answers

The mass is 2.375 grams

The mass is 3.375 grams

Match the term to its definition (Lessons 6.03, 6.04 and 6.05)
(i can't fit this all without confusion)

Answers

Answer: the first paragraph is rain forest biome and the 2nd one is arctic tundra biome and finally the last paragraph is ocean or marine biome

Explanation:

rain forests have warm temperatures and include alot of animals and plants , artctic tundra biome includes cold temperatures ice stuff and all that and ocean or marine biome is pretty much just the ocean with seals , whales and marine life yk.

What kind of information can we read from the period system? How was it built up?

Answers

Answer:

Explanation:

Periods correspond to the relationship of orbitals, or likely areas in which electrons will be found, inside the outermost shell of the atom. Successive periods down the table correspond to atoms with a more electron-rich core of inner shells.

Period systems where built up from elements

What is the charge on the Cr in Cr2O72-

Answers

Answer:

+6.

Explanation:

So, a chromium atom here has an oxidation number of +6.

In the dichromate ion, the oxidation number of chromium is+6. The sum of the oxidation numbers in Cr2O72-, a polyatomic ion, is -2, the charge of the ion.

use bond enthalpy values to calculate the enthalpy change for the following reactions CH4 (g) + 202 (g) --> CO2 (g) + 2H2O (g) SHOW YOUR WORK PLEASE I NEED TO SEE HOW IT WORKS!!!!

Answers

Answer:

: 73.Use bond enthalpy values to calculate the enthalpy change for the following reactions. Bond enthalpy values are given on the next page. It is very important to draw the appropriate Lewis Structures to know exactly which bonds are broken and which bonds are formed. CH4 ( + Brz (→ CH3Br (2+ HBr ( CzH4 + HBr → CzHsBr CaHs to + H2 (→ CH10 l C3H6 tes + 12 6 → CHol2 ley

Explanation:

The enthalpy change for the given following chemical equation is 204 kJ/mole.

What is chemical equation?

Chemical equation is a symbolic representation of a chemical reaction which is written in the form of symbols and chemical formulas.The reactants are present on the left hand side while the products are present on the right hand side.

A plus sign is present between reactants and products if they are more than one in any case and an arrow is present pointing towards the product side which indicates the direction of the reaction .There are coefficients present next to the chemical symbols and formulas .

The sum of reactant's enthalpy, C-H +O=O=413+495=908 KJ/mole and that of product is C=O +H-O=445+467=1112 KJ/mole and hence the difference is 1112-908=204 kJ/mole.

Learn more about chemical equation,here:

https://brainly.com/question/30087623

#SPJ1

I need help ASAP! 10 points!

Answers

Answer:

The answer to this question is ( a )

Explanation:

ionic: transfer of electrons covalent: sharing of electrons

There are two groups of waves with the same amplitude. One contains waves of short wavelength and the other has waves of long wave-length, Which waves have the most energy? (pls answer asap)

Answers

Answer:

i think the long wavelength has more energy

Explanation:

plz correct me if i'm wrong

No thx hehehehehhehe

Name an element that has equal protons and neutrons. plz answer fast

Answers

Answer:

Helium

Explanation:

Helium has atomic number=Z=2Atomic Mass=4uGroup-18(inert/noble gases)Period-1

6. In a hexagonal close-packed crystal, every atom (except those on the surface) has
neighbors.
6
8
12
10

Answers

Answer:

Explanation:

I got it from quizlet

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