Chemistry Middle School

Which of the following is the best way to explain how baking a cake or frying an egg is a chemical change?

A Both are changing size and shape.
B Heat is changing the texture of both substances.
C Heat is being added to both, causing a phase change.
D The end products of both cannot be reversed to their original forms.

Answers

Answer 1

Answer:

I think C if not then B

Explanation:

Heat will change the product and will become a chemical change.

Answer 2

Answer:

Explanation:

because you literately cant change it back

to its original form also chemical change means something is permanently

changed so when you bake a cake or fry an egg there is no way possible to change it back

Related Questions

What physical property of mercury makes it best suited for use in a thermometer

Answers

Answer:

High coefficient of expansion

Explanation:

It is only mercury that is in liquid form at room temperature. It works on the principle of thermal expansion, it expands when heated and contracts when cooled. The very minute change can be notable by the use of mercury in the thermometer. So this property of the thermometer makes it suitable for measuring temperatures.

High coefficient of expansion

write a short story using the characteristics of the subatomic particles and their locations in the atom. For example, you need a positive character, a neutral character, and a negative character. You need two different locations. One to be the center location of the story and the other to be outside the center. At a minimum you should have at least 1 paragraph with about 5 sentences. Make sure that you use complete sentences.
Make sure it is school appropriate!!

Answers

Explanation: There are three subatomic particles called electrons, protons, and neutrons. Electrons have a negative charge, protons have a positive charge, neutrons have no charge. The particles are held withen the atom by 4 fundamental forces-gravity, electromagnetic force, strong force, and weak force

A whole story ??? Like a full on story or

All the elements in this group form __________ ions with a positive _________ charge. _____________ is the most reactive element in the group.

(group 2-alkaline earth metals)

Answers

Answer:

1) positive

2)2

3)strontium

Explanation:

Choose all the answers that apply.
Extinction can be caused by _____.
habitat destruction
natural disasters
disease
invasive species
The answer is all of the above

Answers

Answer:

All of above

Explanation:

There are still more like global warming, population over growth, and even overconsumption. But mainly habitat destruction, natural disasters, disease, and invasive species. Just remember that this are all naturally occurring ways of extinction.

1. Using D10W and a vial of NaCl 4 mEq/mL, how many mL of NaCl are needed to prepare 250 mL of a
D10/NS solution?
a. 4.8mL
b. 9.6ml
c. 19.6mL
d. 154mL

Answers

To prepare 250 mL of a D10/NS solution using D10W and a vial of NaCl 4 mEq/mL, you would need 9.6 mL of NaCl. Normal saline (NS) contains 154 mEq/L of sodium chloride (NaCl). To prepare 250 mL of NS, you would need 250 mL * (154 mEq/L) = 38500 mEq of NaCl. Since the vial of NaCl contains 4 mEq/mL, you would need 38500 mEq / (4 mEq/mL) = 9625 mL = 9.6 mL of NaCl. So the correct answer is b. 9.6ml.

the correct answer is A 4.8 mL

What type of person studies and collects data on the weather?

Answers

The answer would be a Meteorologist

Meteorologist is a person who studies and collects data

Number the events from earliest (1) to most recent (6) to outline the development of the cell theory.

____ Anton van Leeuwenhoek observed small organisms he called “animalcules.”

_____ Robert Hooke was the first to use the word “cell.”

_____ Matthias Schleiden theorized that plants are made of cells.

______ Theodor Schwann theorized that animals are made of cells.

______ Hans and Zacharias Janssen created the first microscope.

_____ Rudolf Virchow theorized that cells come from other pre-existing cells.

sorry if it's the wrong subject, science wasn't on there sorry
offering 40 points for this question
Please answer correctly
brainly for the correct answer

Answers

Answer:

Explanation:

__3__ Anton van Leeuwenhoek observed small organisms he called “animalcules.”

___2___ Robert Hooke was the first to use the word “cell.”

___4___ Matthias Schleiden theorized that plants are made of cells.

___5___ Theodor Schwann theorized that animals are made of cells.

___1___ Hans and Zacharias Janssen created the first microscope.

___6___ Rudolf Virchow theorized that cells come from other pre-existing cells

Order from earliest to most recent:
3
2
4
5
1
6

please help with checking over work

Answers

Answer: Water Particles!

Explanation: You are correct! Water particles help the sound waves to travel back and forth.

You are correct without a doubt good job man

HELP PLS EEEEEEEEEEEEEEEEEEEE

Answers

Answer:

what do you help with

Explanation:

I think it’s B!! Good luck

G
A substance occupies one half of an open container. The atoms of the substance are closely packed but are still
able to slide past each other.
What is most likely the phase of the substance?
gas
liquid
solid and gas
O liquid and solid
Mark this and return
Save and Exit
Next
Submit

Answers

Answer:

Solid and gas

Explanation:

The total answer is solid and gas

please hurry Participants in an informal discussion would most likely

use casual, friendly conversation.
establish rules and guidelines to follow.
set certain goals and work to meet them.
prepare before the discussion takes place.

Answers

The answer is A. use casual, friendly conversation.

The answer is A informal is when you have a relaxed, friendly, or unofficial style, manner, or nature

actinium-226 has a half-life of 29 hours if 100 mg of actinium-226 disintegrates over a period of 58 hours how many mg of actinium-226 will remain

Answers

i am not sure i’m sorry

Answer:25 g

Explanation:

in quizlet

is this loki on fairy tail because with blond hair and with glasses or without glasses (he has no glasses anymore)

Answers

Answer:

yes it is

Explanation

grey vs natsu

Can somebody help me with my science HW

Answers

1.C 2. A 3. A 4. B 5. B 6. C

1. D
2. C
3. C
4. B
5. C

Simple and complex molecules are similar in that they both involve ____ atoms A water B simple C bonded D complex

Answers

Answer:

The answer is C.

Explanation:

Please give brainliest

Answer:

Explanation:

complex, in chemistry, a substance, either an ion or an electrically neutral molecule, formed by the union of simpler substances (as compounds or ions) and held together by forces that are chemical (i.e., dependent on specific properties of particular atomic structures) rather than physical.

Which statement describes what is gained or lost during radioactive decay?

Atoms gain other atoms.
Elements take in energy.
Atoms lose smaller particles.
Elements gain smaller particles.

Answers

Answer: The correct statement is: Atoms lose smaller particles during radioactive decay.

Explanation:

Radioactive decay is a process where unstable atomic nuclei lose energy by emitting radiation in the form of particles or electromagnetic waves. As a result of this process, the unstable atoms transform into a different element or isotope. During the decay, the atoms lose smaller particles such as alpha particles, beta particles, or gamma rays. This loss of particles changes the number of protons and neutrons in the nucleus, which leads to the formation of a new element.

statement describes what is gained or lost during radioactive decay: atoms lose smaller particles. That is the third option, as during radioactive decay, the nucleus of an atom can lose subatomic particles, such as alpha or beta particles, which results in the transformation of the original atom into a new atom or a different isotope of the same element.

What is radioactive decay?

Radioactive decay is a process by which the nucleus of an unstable atom loses energy by emitting subatomic particles, such as alpha or beta particles, or electromagnetic radiation, such as gamma rays. This loss of energy can result in the transformation of the original atom into a new atom or a different isotope of the same element.

Hence, the statement describes what is gained or lost during radioactive decay: atoms lose smaller particles, which is the third option.

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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.

How do you know if something is alive? Describe some of the characteristics of living things

Answers

Breathing,Moving,Hunger,and the need to. Drink water

growth & development, reproduction, movement, breathing, & responds to the environment

Which accurately describes reproduction in gymnosperms? Select four options.

Some require heat for seed dispersal.
Female cones produce pollen.
Most gymnosperms produce male and female cones.
Fertilized ovules grow into seeds.
Male and female cones may grow on the same plant.

Answers

The four options that accurately describe reproduction in gymnosperms are:Fertilized ovules grow into seeds.Male and female cones may grow on the same plant.Most gymnosperms produce male and female cones.Some require heat for seed dispersal.Female cones do not produce pollen in gymnosperms. Instead, male cones produce pollen which is then carried by the wind or insects to the female cones for fertilization.

One of the major ways humans depend on marine plants is for which of the following?

A.) Production of oxygen

B.) Regulation of ocean temperature

C.) Increasing atmospheric carbon dioxide

D.) Maintaining the concentration of salt

Answers

A. Production of oxygen

Matter are anything that is made up of atoms. The quantity of matter can be observed only on the basis of mass and volume calculation. Therefore, the correct option is option A.

What is matter?

Matter is a substance that has some mass and can occupy some volume. The matter is mainly used in science. Matter can be solid, liquid or gas.

Matter is anything that is made up of atoms. Anything around us that can be physically seen and touched are matter. Ice, water and water vapors are example of matter.

So as we saw that matter has some mass so mass can be measured in gram only. Mass can also be represented as number of molecules. We also saw that matter occupy some volume and that volume is measured only in liter. Oxygen is the only thing for which humans depend on marine plants. Oxygen is very important for humans.

Therefore, the correct option is option A.

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QUESTION 1.... Please help!!
Competition between two organisms for resources is a limiting factor because...
A. There is only a limited amount of food and living
space available in any ecosystem.

B.Predator-prey populations often increase and decrease in cycles.

C.Abiotic factors such as light, water, and temperature are present.

D.Cities, highways, campgrounds, and orchards provide alternate environments for
animals and plants.

Answers

I would say the answer is A. It makes the most sense because the organisms must compete for the limited amount of food and living space.

How does an increase in altitude affect the climate?

Answers

Answer:

As you increase in elevation, there is less air above you thus the pressure decreases. As the pressure decreases, air molecules spread out further (i.e. air expands) and the temperature decreases. If the humidity is at 100 percent (because it's snowing), the temperature decreases more slowly with height.

Explanation:

Hopes this helps and plz mark me brainliest!

Which of the following is not true about both scientific laws and scientific theories?

A. Both are based on hypotheses

B. Both can be used to make predictions

C. Both can be modified if new evidence arises

D. Both are used to explain why a phenomenon happens.

Answers

Answer:

Explanation:

the answer would be : D

when do scientists use models i will mark best one brainlest

Answers

They use models when they are trying to find stuff in the ground like fossils so they match them up so they can find if it’s the same or not please mark brainliest must appreciated !

Scientists use models when doing research to lay out their data. They can also use them to explore phenomena that are too vast complex or to dangerous to study first hand. They use it to investigate objects or processes that happen too slowly to quickly or on to small of a scale to observe directly

Even though the iceberg and the water that surrounds it are made up of the same substance, the iceberg is able to float. Why is this?

HELP ME PLZ!!

Answers

Answer:

Because ice contains some air in it.

Probably because ice is about 9% less dense than water

Please help me por favor :'(

Answers

More volume, takes longer to heat all the molecules.

What was the low temperature for hurricane Katrina?

Answers

Answer: 90 degrees F

Explanation:

The temperature was 90 F (32 C)

Which group of elements is not usually reactive with any other elements?
A. metaloids
B. plastics
C. noble gases
D. metals

Answers

Answer:

Noble gases

Explanation:

Noble gases are usallly unreactive.

Answer:

Nobel gases

Explanation:

Which of the units below could be used to measure velocity? Check all that apply.
Group of answer choices

32 ft/sec downward

14 m/s

165 km/min to the right

285 yd/hr

5 mi/min

27 mph North

Answers

The answers are 32 ft/sec downward and 165 Km/min to the right.

Answer:

32 ft/sec downward and 165 km/min to the right

Explanation:

Can somebody help me with this, please? Please Asap

Answers

Answer:

im not sure what exactly you want? if its answering the questions then search up each one and rephrase the answers you get, for instance for mitochondria is the powerhouse of the cell. just write something simple thats what i did when i had to do something like this it took only a couple of minutes

Explanation:

The Organelles help the cell to function efficiently.

What are the organelles in the cell?

I can see that your question has to do with the organelles in the cell but I don't quite get the analogies that you intend to use. However, I would explain the organelles one after the other.

Endoplasmic reticulum: The endoplasmic reticulum (ER) is a network of membranous tubes and sacs within the cytoplasm of eukaryotic cells. It serves as a transport system for proteins and lipids, as well as a site for folding and modification of newly synthesized proteins.

Ribosomes: Ribosomes are complex molecular machines that are found in the cytoplasm of all living cells. They are responsible for synthesizing proteins from amino acids, which are the building blocks of proteins.

Mitochondria: These are organelles found in the cytoplasm of eukaryotic cells. They are often referred to as the "powerhouses" of the cell because they are responsible for producing most of the cell's energy in the form of ATP (adenosine triphosphate).

Vacuole: Vacuoles are membrane-bound organelles found in eukaryotic cells. They are large, fluid-filled compartments that serve several important functions within the cell, including storage of nutrients and waste, regulation of the cell's water balance, and maintenance of cell shape.

Cytoplasm: Cytoplasm is the gel-like substance that fills the interior of eukaryotic cells, excluding the nucleus. It is a complex mixture of water, ions, organic molecules, and a variety of cellular structures, including organelles such as mitochondria, ribosomes, endoplasmic reticulum, and lysosomes.

Lysosomes :Lysosomes are membrane-bound organelles found in eukaryotic cells. They are referred to as the "garbage trucks" of the cell because they are responsible for breaking down and recycling cellular waste and unwanted material.

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