Identify the phase change described by the following equations.

a. C18H38(s) → C18H38(l) _______________________

b. CO2(g) → CO2(s) _______________________

c. NH3(l) → NH3(g) _______________________

Answers

Answer 1

Answer:

it is b

Explanation:

Becuase CO2(g) is the right answer bc i said so ok if u think im wrong ask your mom of if u say im dum im not im a teacher ok bye


Related Questions

can someone help me please

Answers

First response

Answer:

102°C is equal to

375.15 kelvin

Formula:

102°C + 273.15 = 375.15K

Therefore! your answer would be the third option

Answer:

375.15

Explanation:

102°C+273.15=375.15K

Hope I helped!

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It's like eviction number four now
Go 'head and ash it on the floor now
Girl go 'head and show me how you go down
And I feel my whole body peaking
And I'm F anybody with they legs wide
NAME THE SONG

Answers

Low life?- i’m pretty sure

Balanced Equation for C3H8​

Answers

Answer:

The balanced chemical equation for the combustion of propane is: C3H8(g)+5O2(g)→3CO2(g)+4H2O(g).

hope it helps :)

What Happens When extra Solute is added to unsaturated ,saturated and supersaturated solution​

Answers

Answer:

If More solute is added and it does not dissolve,then the original solution was saturated. if the added solute dissolves,then the original solution was unsaturated. A solution that has been allowed to reach equilibrium but which has extra undissolved solute at the bottom of the container must be saturated.

Electromagnetic waves used in broadcasting are called?

Answers

Frequency ehdjdjdjdjdjdjdjdjdjdjdjdjdjdjsjdjssjs

A ball is thrown upward as shown. Gravity pulls (accelerates) the ball back down. Which of the following statements is true?

Velocity and acceleration are both positive.


Velocity is negative and acceleration is positive.


Velocity is positive and acceleration is negative.


Velocity and acceleration are both negative.

Answers

Answer:

I think third one is the right answer

Explanation:

if it is right please mark me as brainliest

Answer:velocity is positive

acceleration negative?

Explanation:

A sample of helium gas at a pressure of 0.538 atm and a temperature of 256 °C, occupies a volume of 437 mL. If the gas is cooled at constant pressure until its volume is 316 mL, the temperature of the gas sample will be

Answers

Answer:

110 °C

Explanation:

The following data were obtained from the question:

Initial pressure (P1) = 0.538 atm

Initial temperature (T1) = 256 °C

Initial volume (V1) = 437 mL.

Final pressure (P2) = constant = 0.538 atm

Final volume (V2) = 316 mL

Final temperature (T2) =?

Next we shall convert 256 °C to Kelvin temperature. This Can be obtained as follow:

T(K) = T(°C) + 273

Initial temperature (T1) = 256 °C

Initial temperature (T1) = 256 °C + 273 = 529 K

Next, we shall determine the new temperature of the gas as illustrated below:

Pressure = constant

Initial temperature (T1) = 529 K

Initial volume (V1) = 437 mL.

Final volume (V2) = 316 mL

Final temperature (T2) =?

Applying the Charles' law equation, we have:

V1 /T1 = V2 /T2

437/529 = 316/T2

Cross multiply

437 × T2 = 529 × 316

437 × T2 = 167164

Divide both side by 437

T2 = 167164 / 437

T2 = 382.5 ≈ 383 K

Finally, we shall convert 383 K to celsius temperature. This can be obtained as follow:

T(°C) = T(K) – 273

T(K) = 383 K

T(°C) = 383 – 273

T(°C) = 110 °C

Therefore, the new temperature of the gas is 110 °C

As you move down the periodic table the atomic radius gets bigger. This is because __

Answers

the atoms have more energy levels

HELP!!!!!!! THIS NEEDS TO BE DONE BY TODAY!!!!

Answers

Answer:I think it is A or C

Explanation:

Based on what you know about the daughter cells that form by mitosis and meiosis, how do you think the offspring of asexually and sexually reproducing organisms compare to their parents? Justify your answer.

Answers

Answer:

well u see the offspring of asexual production will be identical to the parent because it only needs 1 parent where as sexual production requires 2 parents so it would look like both parents

Which is a fungus that lives together with a certain algae or bacteria?


spore

hyphae

lichen

fruiting body

Answers

lichen because it lives with the bacteria

is silver nitrate a gas or solid

Answers

Answer:

soild

Explanation:

Answer:solid

Explanation:

what is the oxidation state of calcium

Answers

0

Rule 1 states that the oxidation numbers of an atom in an element is always 0, so the oxidation number for Ca in the metal and O in O2 have oxidation numbers of zero

hope this helped :)

Verbal expressions, body language, and facial expressions are all __________ components of emotion.
A.
psychological
B.
physiological
C.
cognitive
D.
behavioral


Please select the best answer from the choices provided

Answers

Answer:

D

I just got it right

Answer:

D

Explanation:

On edge

INFER if the total mass of the products in a reaction is 90 grams,
what was the total mass of the reactants?

Answers

Answer:

90 grams. Input mass = output mass

Explanation:

Which of the following is accurate
regarding intrusive igneous rock?

A. It forms on the earth's surface.

B. It forms inside the earth.

C. It is made from sediments.

D. It has a fine-grained texture.

Answers

Answer:

B

Explanation:

I believe because intrusive stays within the earth

The accurate statement regarding the intrusive igneous rock is that It forms inside the earth.Hence, Option (B) is correct.

What are Intrusive igneous rock ?

Intrusive, or plutonic, igneous rock forms when magma remains inside the Earth's crust where it cools and solidifies in chambers within pre-existing rock.

The magma cools very slowly over many thousands or millions of years until is solidifies.

Therefore, The accurate statement regarding the intrusive igneous rock is that It forms inside the earth.Hence, Option (B) is correct.

Learn more about Rocks here ;

https://brainly.com/question/19930528

#SPJ2

The table below describes two parts of living cells.
WHO EVER ANSWERS IT I WILL GIVE BRAINIEST!!

Parts of Living Cells

Plant cell Animal cell

Part A Present Present

Part B Present Absent

Which of the following is most likely correct? (1 point)


a

Part A is vacuole, Part B is nucleus


b

Part A is mitochondria, Part B is cell wall


c

Part A is cell wall, Part B is cell membrane


d

Part A is chloroplast, Part B is mitochondria

Answers

Answer: membrane and cell wall

Explanation: this is because the cell wall is only known to happen in plant cells and a membrane is in both plant and animal cells so it is most likely membrane and cell wall.

Answer:

C

Explanation:

A sample of xenon gas occupies 1.90L at 251 kPa and -18°C. What was the temperature of the xenon if the gas originally measured 1.65 L at 205 kPa?

Answers

The temperature of the xenon : 180.863 K

Further explanation

Combined with Boyle's law and Gay Lussac's law  

[tex]\tt \dfrac{P_1.V_1}{T_1}=\dfrac{P_2.V_2}{T_2}[/tex]

P1 = initial gas pressure (N/m² or Pa)  

V1 = initial gas volume (m³)  

P2 = final gas pressure  

V2 = finalgas  volume  

T1 = initial gas temperature (K)  

T2 = final gas temperature  

P1=251 kPa

T1=-18+273=255 K

V1=1.9 L

P2=205 kPa

V2=1.65 L

[tex]\tt \dfrac{251\times 1.9}{255}=\dfrac{205\times 1.65}{T_2}\\\\T_2=\dfrac{205\times 1.65\times 255}{251\times 1.9}=180.863~K[/tex]

what is the charge on copper in CuSO4?

Answers

HIIIHERE'S YOUR ANSWER

copper sulfate is an ionic compound whose overall charge is zero. The copper ions have a +2 charge. The sulfate ions have a -2 charge.

HOPE IT HELPS YOU OUT PLEASE MARK IT AS BRAINLIEST AND FOLLOW ME PROMISE YOU TO FOLLOW BACK ON BRAINLY.IN

When ice cubes cause weathering, what type of weathering is it called?

Answers

Answer:

Chemical Weathering

Explanation:

Ice wedging and abrasion are two important processes of mechanical weathering. Chemical weathering breaks down rocks by forming new minerals. These minerals are stable at the Earth's surface. Water, carbon dioxide, and oxygen are important agents of chemical weathering.

- Weathering | CK-12 Foundation

Which organelle acts as a temporary storage center, containing water,
waste, and other products?
A. cell membrane
B. cytoplasm
C. vacuole
D. nucleus

Answers

The correct answer would be C, vacuole.

Answer:

pretty sure it is vacuole

Explanation:

...

What is the correct order of biological levels of organization, from the most complex (largest) to least complex (smallest)?

Answers

Answer:

The biological levels of organization of living things arranged from the simplest to most complex are: organelle, cells, tissues, organs, organ systems, organisms, populations, communities, ecosystem, and biosphere

Explanation:

.

What is the state of matter of neon at -247°C?

Answers

Answer:atomic number 10 noble gas

Explanation:

Brian's family has a compost pile at home. They put all the weeds they pull up from the garden in it as well as any vegetable waste they gather from the kitchen. If they keep it moist, all this vegetation will
eventually turn into organic soil by the chemical process of decay. Since decay involves a variety of chemical reactions, how might temperature affect the rate at which the compost turns into sol?
Temperatures near freezing would make it speed up.
It would happen faster at warmer air temperatures.
Changing temperatures would not affect the chemical reactions.
Warm summer air temperatures would make it slow down.

Answers

Answer:

Option - It would happen faster at warmer air temperatures

Explanation:

The chemical process of converting organic matter such as plants, litter into organic soil, or organic compost called decomposition and perform by decomposers such as fungus or bacteria.

Like all other living organisms, decomposers also live in an optimal range of temperature. The major decomposers normally lie in the range of 30 to 40-degree celsius. Any type of fluctuation in this range might slow down the reaction of decomposition.

I need help it’s due in a couple minutes !

Answers

Answer:

chemical composition

Density of water is 1 g/ml. If a piece of wood with a density of 5 g/ml is
placed in a tub of water, will it sink or float? Explain.

Answers

Answer:

The piece of wood will sink

Explanation:

If an object has a density higher than water, it will sink, and the piece of wood is more dense than water when measured.

I need help please 18 points.

Answers

Answer is c hope this helps

Which element below has properties of both metals and non metals ?

Answers

Answer:

I need more information.

Explanation:

Answer:

The answer is metalloids.

The metalloids are a unique group of elements that share properties of both metals and nonmetals. They're also called the semimetals because of the shared properties of these elements along the dividing line between metals and nonmetals.

Hope this helps, have a great day/night, and stay safe!

In all organisms, energy is stored in molecules called:

A. mitochondria
B. heat
C. glucose
D. ATP

Answers

Answer:

It is the D. Atp

Explanation:

Have a good day

How are protons and neutrons the same and how are they different?

Answers

Explanation:

Protons, Neutrons and Electrons are the three primary subatomic particles that form an atom.

Protons and Neutrons are large particles and are densely compacted into the nucleus of the atom. Protons are electrochemically positive in charge and the Neutrons are electrochemically neutral in charge.

Together the protons and Neutrons make up the mass of the atom.

Electrons are electrochemically negatively charged particles that move random around the nucleus. They have a relatively small mass compared to Protons and Neutrons. They are found in electron clouds that surround the nucleus and their movement and properties provide for the bonding characteristics of each atom.

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