Which of the following best
explains why matter changes
from one phase to another?
A. Changes in color causes matter to change
phase.
B. Changes in size causes matter to change
phase.
C. Changes in energy causes matter to change
phase.
D. Changes in volume causes matter to change
phase.

Answer:

12.979 m:L (3 d.p.)

Explanation:

Combined Gas Law

[tex]\sf \dfrac{P_1V_1}{T_1}=\dfrac{P_2V_2}{T_2}[/tex]

Temperature must be in kelvins (K).

To convert Celsius to kelvins, add 273.15.

Volume can be in any unit.

Given values:

Rearrange the equation to isolate V₂:

[tex]\implies \sf V_2=\dfrac{P_1V_1T_2}{P_2T_1}[/tex]

Substitute the given values into the equation:

[tex]\implies \sf V_2=\dfrac{0.837 \cdot 17.5 \cdot 283.15}{0.995 \cdot 321.15}[/tex]

[tex]\implies \sf V_2=12.979\:mL\:(3\:d.p.)[/tex]

Therefore, the volume at 10°C will be 12.979 mL (3 d.p.).

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Temperatures

Apply combined gas law

[tex]\\ \rm\dashrightarrow \dfrac{P1V1}{T1}=\dfrac{P2V2}{T2}[/tex]

[tex]\\ \rm\dashrightarrow V2=\dfrac{P1V1T2}{P2T1}[/tex]

[tex]\\ \rm\dashrightarrow V2=\dfrac{0.837(17.5)(283)}{0.995(321)}[/tex]

[tex]\\ \rm\dashrightarrow V2=12.978mL[/tex]

[tex]\\ \rm\dashrightarrow V2=12.98mL[/tex]

Hii there !

The reaction accompanying production of water in this case would be -

[tex]\green{ \underline { \boxed{ \sf{H_2+ \frac{1}{2}O_2\longrightarrow H_2O}}}}[/tex]

Thus ,by observing the reaction, we can conclude that 1 mole of Hydrogen (H[tex]_2[/tex])react with 1/2 mole of oxygen(O[tex]_2[/tex])to produce 1 mole of water (H[tex]_2[/tex]O)

[tex]\implies[/tex]Therefore, 37.0 moles of hydrogen(H[tex]_2[/tex]) will be required to produce 37.0 moles of water.

Hope it helps.

Answer:

76.210kPa

Explanation:

[tex] \frac{p1v1}{t1} = \frac{p2v2}{t2} \\ p1 = \frac{p2v2t1}{v1t1} \\ p1 = \frac{101.325 \times 200 \times 308}{300 \times 273} \\ p1 = 76.210kpa[/tex]

For an adjustment of the alkalinity from 70 ppm to 100 ppm in a 250,000 gallon pool using sodium bicarbonate, the amount of added chemical  is mathematically given as

X=105lbs

Generally, the equation for the Chemical added  is mathematically given as

X=requred usage*desired change/10ppm*pool of gallon/10000

Therefore

X=1.4*(100-70/10)*(250000/10000

X=105lbs

In conclusion, the added chemical

X=105lbs

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Answer:

The answer is provides an impenetrable outer covering that cannot be penetrated by most pathogens :)

Explanation:

The cells line the skin so then it makes it really difficult for germs to get through. :)

Have an amazing day!!

Answer:

89.6 liters

Explanation:

A STP (standard temperature and pressure) ONE mole of any idea gas will occupies 22.4 liters. So,...

4 moles x 22.4 L/mol = 89.6 liters

8.96 L is the answer

Answer:

Flammable liquid is any liquid having a flashpoint at or below 199.4 °F (93 °C).

Explanation:

:)

Flashpoints for flammable liquids are at 100°F. Lower flash points allow for easier ignition of liquids. A liquid's flash point is the lowest temperature at which a concentrated enough layer of vapor accumulates on top of its surface to allow for ignition.

A liquid that is flammable has a flash point* below 37.8 ° C (100 ° F). A flammable liquid has a flash point that ranges from 37.8 to 93.3° C (100 to 200° F), which is above the standard working temperature. Flammable liquids emit a vapor that, at standard working temperatures, is easily ignitable.

The substance ignites more readily the lower the flash point. For instance, petrol is more flammable than ethylene glycol and has a flash point of about -40 degrees C (-40 °F).

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Answer:

41.495

Explanation:

107 gm of 2NH4Cl gives 111 gm of CaCl2

40 gm of 2 NH4Cl gives =(111*40)/107

=41.495 gm of CaCl2

Examples of agroecology method use are in Burkina Faso are conservation tillage, green manures, natural fertilisers, biological predators and so on.

Agroecology refer to an approach that use ecological processes in agricultural production systems.

The benefits of Agroecology is that it help to protect, restore and also improve agriculture and food systems when there is climate shocks and unfavorable weather conditions.

Therefore, Examples of agroecology method use are in Burkina Faso are conservation tillage, green manures, natural fertilisers, biological predators and so on.

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Answer: Your answer is D. Energy is absorbed.

Hope this helps!

Answer:

Energy is absorbed

Explanation:

For sublimation ....let's look at ice as an example

 you must add calories (heat ) to melt the ice and then heat to produce water vapor  .... sublimation requires energy input

Answer:

true

Explanation:

Answer:

three to four days

Explanation:

Leftover steak is safe to eat after three to four days in the refrigerator—any longer and you could catch a foodborne illness from bacteria growth. Bacteria can also grow on perishable food that has been left out at room temperature for over two hours or kept at a temperature lower than 40°F.

Answer: Ok

Explanation: Explanation:Using recombinant DNA technology to modify an organism's DNA to achieve desirable traits is called genetic engineering. Addition of foreign DNA in the form of recombinant DNA vectors that are generated by molecular cloning is the most common method of genetic engineering.

1129.9 grams of rock salt, NaCl should be added to a 3.78 kg of ice to get the temperature to drop to -19 °C.

The mass of rock salt required to lower the temperature of ice by 19 °C is determined using the Blagden's Law given below:

where;

The van't hoff factor for NaCl, i = 2

Kf for water/ice = 1.86 °C kg/mol

molalityof NaCl = (mass/molar massl) / kg of ice

The mass of NaCl is derived as follows:

molar mass of NaCl = 58.5

mass of ice = 3.78 kg

Let molality of NaCl = X

ΔT = 19 °C

Inputting the values above in the equation of Blagden law:

19 = 2 x 1.86 °C kg/mol x X

X = 5.11 mol/kg

Then, the mass of NaCl will be;

mass of NaCl = 5.11 × 3.78 × 58.5

mass of NaCl = 1129.9 g

Therefore, 1129.9 grams of rock salt, NaCl should be added to a 3.78 kg of ice to get the temperature to drop to -19 °C.

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Answer: Because most electrical wires have an outer coating so you don't get electrocuted when you touch them. You could ask why don't you get electrocuted when you touch a phone charger, same answer, same outer coating.

Answer:

The copper in electrical wires is a great conductor, and birds are not great conductors. So the energy will just bypass the birds and keeps moving along the wire.

Explanation:

Answer:

A: ATCGGA

Explanation:

First, think about which base pairs arise in complementary strands of DNA..

The attractions between anions and cations throughout a crystal are known collectively as ionic bonds.

The ionic bonds are a special type of bond where ions (cations and anions) are mutually attracted.

The ionic bonds are fundamental bonds for the development of certain compounds and molecules.

Ionic bonds may be produced between metal compounds that lose electrons (e-) and non-metals that gain e-.

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Answer:

immediately flush the affected area gently with lukewarm water for at least 30 uninterrupted minutes

Explanation:

If strong acid comes into contact with the skin, immediately wash the affected area gently with lukewarm water for at least 30 minutes and get medical attention immediately.

Exposure to strong acids such as sulphuric acid can occur as skin contact, ingestion, or inhalation of vapors. Each kind of exposure can create serious hazards to health and should be managed quickly and appropriately by medical professionals to reduce damage and health risks.

If strong acid comes into contact with the skin, quickly flush the affected area gently with cold water for at least 30 minutes and seek medical attention immediately. If strong acid gets into your eyes, then flush the eye(s) with water for 30 minutes.

If accidentally ingest strong acid, rinse your mouth with water immediately. But do not induce vomiting and continually rinse your mouth with water. If you inhale strong acid aerosols, get fresh air, and medical attention immediately.

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Answer:

Carbon monoxide

Explanation:

Carbon dioxide and carbon monoxide have the same number of carbon atoms.

Mark Brainliest

Answer:

It has no definite shape or volume.

Explanation:

1) False

2) True

3) True

4) True

5) False

6) True

7) False

8) False

9) False

10) True

I hope it helps you

I'm sorry if I'm late

Work is said to be done when force moves a distance and the direction of motion is in the direction of applied force.

Work done is defined as the product of applied force and the distance which the applied force moves.

According to Newton's second law of motion the acceleration of a body is inversely to its mass ut directly proportional to the force and takes place in the direction of the applied force.

Therefore, work is done when force moves a distance and the direction of motion is in the direction of applied force.

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1 mol BaBR2 produces 2mol KBr .

7 mol s of BaBr_2 produces:-

Option D is correct

Answer:

0.17637 pounds

Explanation:

hope this help

The number of units of NaOH are in 80 grams is 12.046 x 10²³ Particles of NaOH.

The mole, symbol mol, is the SI base unit of amount of substance.

The quantity amount of substance is a measure of how many elementary entities of a given substance are in an object or sample.

Formula to calculate number of Particles when weight of the sample is given ;

N = given weight  / Molecular weight x Nₐ

   = 80 / 40 x 6.023 x 10²³ Particles

   =  12.046 x 10²³ Particles of NaOH

Hence, The number of units of NaOH are in 80 grams is 12.046 x 10²³ Particles of NaOH.

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Based on the titration curve of the monoprotic acid, pKa of the monoprotic acid is closest to 8.0.

A titration curve of an acid is a curve obtained from the plot of the pH against the amount of base added.

The titration curve of an acid reveals its pKa.

The pKa corresponds to the midpoint of titration when equal concentrations of the acid and base have reacted.

From the titration curve above, the pKa of the monoprotic acid is closest to 8.0.

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Considering that copper occupies Group 11, the ionic compound with a transition metal in it is c. CuSO₄.

A transition metal is any of the set of metallic elements occupying a central block (Groups 3–12) in the periodic table. The differential electron occupies a d subshell.

Which of the following ionic compounds has a transition metal in it?

The ionic compound with a transition metal in it is c. CuSO₄.

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The type of carbon fixation stores carbon dioxide in acid form is CAM i.e. crassulacean acid metabolism.

CAM stands for crassulacean acid metabolism in this process photosynsthesis is occured at day time but the exchange of gases takes place at night itself only.

In this carbon fixation process, carbon dioxide is stored in the form of organic acid malic acid and losses carbon dioxide at the night time and by doing this it helps in the storage of water.

Hence option (C) is correct.

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Answer:

CAM

Explanation:

Yes the correct answer is option C, ( CAM)  I just took the test.