Two white powders are mixed in a flask the bottom of the flask feels cooler this is an example of what kind of reaction?

Answers

Answer 1
This is an endothermic reaction.

Related Questions

What causes water droplets to form on the outside of a glass?

Answers

Water droplets are formed in the outside of a cold glass because of condensation.

Answer:

under me :)

Explanation:

There is water vapour present around us. When you put cold glass on a table, the water vapour comes in contact with the glass, and condenses, forming water droplets which are seen around the glass. Hope this helps

Why glucose and fructose produce same shaped products with phenylhydrazine?

Answers

During the reaction of glucose and fructose with excess phenylhydrazine to form osazone, only the C-1andC-2 atoms of glucose and fructose participate in the reaction. The rest of the molecule remains intact. Hence, glucose and fructose produce the same osazone.

Weathering and Erosion Unit Test
Explain how crustal deformation builds landforms.
O
When two tectonic plates start to push into each other they can rise up and build mountains, or sink under
and create deep valleys.
O When wind and rain slowly wear away rock, they leave behind new looking landforms.
If
o
When two tectonic plates slide away from each other the inner liquid layer of the mantle comes to the
surface as lava and creates new islands.
It
When sediments are laid down over vast areas the forces involved create rock over a very long period of
time.
It
HELP ME ASAPPP PLEASEEE

Answers

Crustal deformation builds landforms when two tectonic plates start to push into each other they can rise up and build mountains, or when they sink under, they create valleys.

How crustal deformation builds landforms?

Tectonic pressure in a crust can cause folding. Folding can end up with  the formation of valleys and mountains so we can conclude that when two tectonic plates start to push into each other they can rise up and build mountains, or when they sink under, they create deep valleys.

Learn more about plates here: https://brainly.com/question/16939139

What is the wavelength of a light of frequency 4.47x10^14 Hz?​

(It's 671 nm)

Answers

Its a the first one number 671

What is the difference between a nuclear and thermonuclear bomb.

Answers

Explanation:

the difference between a nuclear bomb and a thermonuclear bomb is that :

A nuclear bomb derives it's destructive force from nuclear reaction. That is,fission reaction, fusion reaction or both.

While thermonuclear bomb derives it's own force from a chain reaction in which isotopes of hydrogen combines under extremely high temperature to form helium under a process known as nuclear fusion.

PLEASE RATE AND MARK BRIANLIEST!!!

Heavy rain and runoff can
A cause erosion
B cause flooding
C fill reservoirs
D all of the above

Answers

The answer is D, all of the above

Which chemical compound is added to natural gas to safely detect leaks in pipelines and appliances?.

Answers

Answer:

Mercaptan is the additive that is added to natural gas to make it easier to detect in case of a leak. The most important thing to know about mercaptan is that it stinks. Some people compare it to the smell of rotten eggs.

Explanation:

how many moles of hydrogen are in 4.0 moles of H2SO4

Answers

Answer:

1 grams H2SO4 is equal to 0.010195916576195 mole.

Explanation:

I need help finding real life images of both prophase and interphase. I end up mixing them together

Answers

Answer:

the first picture is of prophase and the second one is interphase

Explanation:

please Mark as BRAINLIEST

According to the Law of Conservation of Matter _______.
a. No atoms are created or destroyed whenever matter undergoes a physical change but can when matter undergoes a chemical change.
b. Atoms are created but not destroyed whenever matter undergoes a physical or chemical change.
c. Atoms are destroyed but not created whenever matter undergoes a physical or chemical change Some atoms are created or destroyed whenever matter undergoes a physical or chemical change.
d. No atoms are created or destroyed whenever matter undergoes a physical or chemical change.

Answers

Answer:

A.

Explanation:

Matter is neither created nor destroyed unless it is acted upon by a chemical force/change.

What kind of energy can be transferred?
____energy

Answers

Answer:

I think it's thermal energy. c:

Answer

Thermal energy transfers occur in three ways: conduction, convection, and radiation. Conduction is when thermal energy is transferred between molecules in contact with one another.

Thermal is the answer.

What type of compound is HCI?
A. Ionic
B. Molecular
C. Acid
D. Hydrate

Answers

HCL is an acid so the correct answer is C

Describe how the mol- ecule whose formula is NO is different from the molecule whose formula is N 2 O.

Answers

Answer:

No, it's a molecule that contains one nitrogen atom and one oxygen atom. This is in contrast to N 2 O, which consists of two nitrogen atoms and one oxygen atom.

What is the main source of energy for the water cycle.

Answers

Answer:

The main source of energy is the sun. The sun has a big part in the water cycle because it turns the water into water vapor. This cause the water cycle to start over again once it rains. Therefore, making the sun ne of the biggest parts in the water cycle.

What is the empirical formula of these molecules? Down below. Show your work.

Answers

censures hydrogen Oxygen

Answer:

v

Substance Specific Heat Capacity J/Kgo C Ammonia 4700 Ethanol 2440 Gasoline 2220 Water 4186 A liquid has a mass of 18. 39g. If 655J of heat are required to change the temperature from 32. 8oC to 18. 2oC, what is the identity of the liquid? A) ammonia B) ethanol C) gasoline D) water

Answers

Answer:

B) ethanol

Explanation:

that is the answer I got it in my test

What number of moles of aluminum is required to completely react with 3.20 moles of iron(III) oxide, Fe2O3 according to the following reaction?
SHOW YOUR WORK!!

Fe2O3 + 2 Al → 2 Fe + Al2O3

Answers

Answer: 6.40 moles

Explanation:

How many moles are in 3.5 of “K”?

Answers

Answer: 136.84405 g of potassium

Explanation: i don't know how can i know the moles in element?

Use the image to rank the colors from the color that will refract the least to the color that will refract the most.

Least





Most

Answers

Answer:

Violet is most likely to refract, while red is least likely to refract

Explanation:

The wavelengths :)

Dispersion states that the shorter the wavelength of the light/color, the more it is refracted. Because of this, the red light is less likely to refract while violet light is most likely to refract

What are the uses of Diamonds?
your own answer
please help​

Answers

Answer:

Diamonds are very important in our daily lives ,so therefore it has many uses

1.They are used ad beauty products

2.They are used in automative industry

3.They are used in making windows

4.They are used as medicine

Explain the process that creates chemical elements lighter than iron, including evidence.

Answers

Answer:

. The authorities have closed the casino.(change in passive)

Is boiling a chemical reaction?

Answers

Answer:

yes, because water is reacting with air and heat and creating a boiling effect.

Explanation: kracken doge

Answer: Freezing and boiling are considered to be examples of chemical reactions. This depends on their conception of substance. If students regard ice as a different substance from liquid water they are likely to classify the melting of ice as a chemical change.

Explanation:

Boiling water, boiling water is an example of a physical change and not a chemical change because the water vapor still has the same molecular structure as liquid water (H2O). No, boiling water is NOT a chemical reaction, but it is a physical change.

3. If a sample of gas occupies 6.80 L at 325oC, what will its volume be at 25oC if the pressure doesn't change

Answers

Answer:

V2 = 3.39

Explanation:

V1/T1 = V2/T2

V1 = 6.80L

T1 = 325C (must be convert to K by + 273.15) = 598.15 K

T2 = 25C = 298.15 K

V2 =?

T2xV1/T1 = V2

298.15 x 6.80/ 598.15 = V2

3.39 = V2

So 3.39 is the answer!

Is H2O a compound, mixture or element? Molecule, mixture, compound, element.

Answers

Answer:

Compound

Explanation:

This is because it made up of two elements that's is hydrogen and oxygen in the ratio of 2:1 respectively

Answer:

Compound

Explanation:

H2O isn't on the periodic table so it's not an element. H2O isn't a molecule because it's water. H2O isn't a mixture because it can't be seperated. So, it must be a copound.

A weather map of Chicago with a high pressure system and warm front. Based on the weather map, what might the upcoming weather be like in Chicago? Warm, dry, clear skies Warm, humid, possible thunderstorms Cold, dry, clear skies Cool, humid, possible thunderstorms.

Answers

A weather map of Chicago with a high pressure system and warm front, so the upcoming weather be Warm, dry, clear skies in Chicago.

What is high pressure of air?

High pressure of air tries to compress the gas from upper atmosphere to lower atmosphere.

When any gas has high pressure then it sinks towards the land from the upper atmosphere, and at the upper part air gets cool and form water vapor. When air comes towards the land then, it becomes warm and dry as it doesn't participate in the formation of precipitate. Due to which we are able to see clear sky at the dry days.

Hence, option (1) is correct i.e. Warm, dry, clear skies are the upcoming weather.

To know more about pressure of air, visit the below link:

https://brainly.com/question/441281

Answer:

A. Warm, dry, clear skies

( Hope this helps ) <3    ( Give person above brainliest )

help please:)


how do the red blood cell's shape and size support its function

Answers

Answer:

The size of a red blood cell allows for more room to have more cells, The shape of a red blood cell allow it to trap and absorb oxygen

Explanation:

Red blood cells are very small, The shape of a red blood cell isn't just a sphere

Name the different groups of metals. Name an element with each group.

Answers

Answer:

alkali metals, alkaline earth metals, transition metals, basic metals, lanthanides (rare earth elements), and actinides. 

Explanation:

How do you test for carbon dioxide ?? Explain

Answers

Answer:

Carbon dioxide reacts with calcium hydroxide solution to produce a white precipitate of calcium carbonate

Explanation:

. Limewater is a solution of calcium hydroxide. If carbon dioxide is bubbled through limewater, the limewater turns milky or cloudy white

You have 40 g of NaCl in 530 g of water.
What is the freezing point?

Answers

Answer:

801 •C

Explanation:

Hope this helps! :)

Please mark brainliest if it helped!

Aluminum has a density of 2.70 g/cm 3 . Boron has a density of 2.08 g/cm 3 . Predict the density of gallium. Explain your answer.

Answers

Answer:

dohsf approval all or pow

Explanation:

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