[tex]density \: = \frac{mass}{volume} [/tex]
mass = 12.3 × 25
= 307.5
approximately = 308 g
The reaction nC2H4 -> (-C2H4-)n is an example of
1. saponification
2. esterification
3. polymerization
4. fermentation
Answer:
answer
polymerization
Rubidium, Rb, has a heat of vaporization, Hvap of 69.0 kJ/mol and an entropy of vaporization, Svap of 71.9 J/K mol. Calculate the normal boiling point of rubidium. Group of answer choices
nswer: 959.67 K or 686.67 C
Explanation:
Entropy of Vaporization (S) = Heat of Vaporization (H) / T ( boiling point) (in Kelvin)
1.) Flip the equation to have T as the product --> T = H/S
2.) We need to change H from kJ to J --> 69.0 kJ/mol --> 69000J/mol
3.) Substitute numbers in the equation --> (69000 kJ/mol) / (71.9 J/Kmol) = T
4.) T = 959.67 K or in Celcius --> 959.67 - 273 = 686.67 C
How are oxygen and ozone alike and different? Explain.
Answer:
oxygen and ozone are different because they are made up of 3 oxeygen atoms
Explanation:
How many moles of carbon dioxide are produced from the combustion of 110 g of ch4.
Answer:
answer: 6.875 moles
Explanation:
nCH4 = nCO2 = 110/(12 + 4) = 6.875
A chemist uses 0.25 l of 2.00 m h2so4 to completely neutralize a 2.00 l of solution of naoh. the balanced chemical equation of the reaction is given below. 2naoh h2so4 right arrow. na2so4 2h2o what is the concentration of naoh that is used? 0.063 m 0.25 m 0.50 m 1.0 m
The concentration of the NaOH in the solution will be 0.5 mol/L
What will be the concentration?The concentration is defined as the amount of a particular chemical present in the mixture.
Now the given chemical reaction is:
2NaOH + H₂SO₄ = Na₂SO₄ + 2H₂O
The volume of (H₂SO₄)=0.25 L
The concentration of (H₂SO₄)=2.00 mol/L
The volume of (NaOH)=2.00 L
Now the concentration will be calculated as:
[tex]c(NaOH)= \dfrac{2c(H_2SO_4)}{v(NaOH)}[/tex]
[tex]c(NaOH)=\dfrac{2\times2\times 0.25}{2} =0.5\ \frac{mole}{L}[/tex]
Hence, the concentration of a solution of NaOH is 0.5 mol/L
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Answer:
C. 0.50 M
Explanation:
Correct on Edge 2022!!!
Good luck everyone, you got this! Have a great day!
Spindle fibers pull omologous pairs to ends of the cell 4 haploid daughter cells from
HELP PLEASE
What term describes ocean water being forced onto land during a hurricane?
current
tsunami
storm surge
white cap
Answer:
Storm Surge
Explanation:
A storm surge is a rise in sea level that occurs during tropical cyclones, intense storms also known as typhoons or hurricanes.
If 10.00 mL of the solution prepared in question 4 is used to make another 125.00 mL solution of NaCl, what is the new concentration
The new concentration of the solution is 0.016 M
DilutionFrom the question, we are to determine the concentration of the new solution prepared from question 4.
NOTE: Question is provided below
From question 4, the concentration of the sodium chloride solution is 0.200M
Now, to determine the new concentration,
Using the dilution law
C₁V₁ = C₂V₂
Where
C₁ is the initial concentration
V₁ is the initial volume
C₂ if the final concentration
and V₂ is the final volume
Then,
C₁ = 0.200 M
V₁ = 10.00 mL
C₂ = ?
V₂ = 125.00 mL
Then,
0.200 × 10.00 = C₂ × 125.00
[tex]C_{2}= \frac{0.200 \times 10}{125.00}[/tex]
C₂ = 0.016 M
Hence, the new concentration of the solution is 0.016 M
Question 4:
Calculate the amount of solid sodium chloride needed to make 200.00 mL of a 0.200 M solution
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How do electrons transition between energy levels?
3. A chemist collects 59.0 mL of sulfur dioxide gas on a day when the atmospheric pressure is 0.989 atm. On the
next day, the pressure has changed to 0.967 atm. What will the volume of the SO2 gas be on the second day?
Answer:
We have a chemist who collects 59 ml of S. 0. 2 at the pressure atmospheric pressure. Also, this one is considered as proven. We one and this one is pretty even so this is 0.989 atmospheres. Now is the second day the pressure atmospheric pressure was 0.967 atmospheres. Then what is the pressure of sulfur dioxide in the flask? Oh, so if you see here, we know that the one we want is equal to P two. We do so from the ideas equation. So this one is equal to what we want we do so we do is equal to P one. We want we do. Then it is equal to P one is 59 B one and B one is 0.989 and debated by 0.967 atmospheres. So this one is atmospheres and atmospheres and this one is Ml. So here the 0.967 atmospheric pressure is 60.34 ML approximating so this is the pressure of the gas at 0.967 on the second day.
Hope it helps!!!Brainliest pls!!!
The concept Boyle's law is used here to determine the new volume of sulphur dioxide. Boyle’s law was put forward by the Anglo-Irish chemist Robert Boyle in the year 1662. Here the new volume is 60.34 mL.
What is Boyle's law?A gas law known as Boyle's law asserts that a gas's pressure is inversely proportional to its volume when it is held at a fixed temperature and of a given mass. To put it another way, as long as the temperature and volume of the gas remain constant, the pressure and volume of the gas are inversely proportional to one another.
For a gas, the relationship between volume and pressure (at constant mass and temperature) can be expressed mathematically as follows.
P = k*(1/V) ⇒ PV = k
For two different gases, the equation is:
P₁V₁ = P₂V₂
V₂ = P₁V₁ / P₂
0.989 × 59.0 / 0.967 = 60.34 mL
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What is the total number of atoms in
1.0 mole of COz?
Answer:
c.1.5 moles of cu Will contain a total of 9.0 * 10 ^ 23 ATOMS.
To convert moles into atoms they molar amount and number of atom is múltiples by avagadro's number.
Which examples are possible environmental impacts of flooding? Select the two correct answers.(1 point)
reduction in tourism
groundwater recharge
damage to homes
damage to infrastructure
pollution of water supply
The two examples which are possible environmental impacts of flooding include:
Groundwater recharge.Pollution of water supply.What is flooding?Flooding can be defined as a geological process that typically involves the covering of earthen (soil) materials and the transportation of these materials by a natural force such as a large amount of water.
This ultimately implies that, flooding causes and has several environmental impacts on the physical environment due to the submergence of a dry land by a large amount of water, and these include the following:
Groundwater recharge.Pollution of water supply.Read more on flooding here: https://brainly.com/question/15663829
Answer:
The two examples which are possible environmental impacts of flooding include:
1. Groundwater recharge.
2. Pollution of water supply.
Explanation:
In the chemical reaction described by the equation, how many moles of Fe2O3 will be produced from 8 moles of Fe?
4Fe(s) + 3O2(g) ------> 2Fe2O3(s)
4
8
12
16
Answer:
4
Explanation:
4moles of Fe reacts =2moles of Fe2O3
8moles of Fe reacts=x moles of Fe2O3
cross multiply
4★X=8★2
X=16/4
X=4
helpppppppppppp
please
is chromium an element
A low-frequency radio wave has a frequency of 250,000 Hz. What is the wavelength of this radio wave?
Answer:
The wavelength of wave is 1.2×10³ m.
Explanation:
Given data:
Frequency of wave = 250,000 Hz
wavelength of wave = ?
Solution:
Formula:
Speed of light = wavelength × frequency
c = λ × f
λ = c/f
speed of light = 3×10⁸ m/s
Wavelength is designated as "λ" and it is the measured in meter. It is the distance between the two crust of two trough.
λ = 3×10⁸ m/s / 250,000 Hz
Hz = s⁻¹
λ = 1.2×10³ m
The wavelength of wave is 1.2×10³ m.
The solid, liquid, and gas states of water differ from each other in
Ο Α.
the mass of the individual molecules.
O B.
the size of the individual molecules.
Ос.
the average speed of the molecules.
O D.
the electrical charge of the molecules.
Answer:
B
Explanation:
the size of the individual molecules.
PLS HELP ASAPP!!!! Describe how are the two forms of energy carried by waves and matter related????
Answer:
Energy is carried from one point to another or from one region to another by moving mass or through the action of waves.
· All waves have a source. This source transforms energy into forms that can be carried as waves.
· Waves are not material objects. Waves represent the moving energy being carried away from the source.
Waves are coordinated vibrations that transport energy. Sometimes waves require the vibration of particles in matter to move, other waves travel without any need for particle vibrations.
Explanation:
Wave energy requires no motion for its movement whereas matter energy requires motion. Wave energy travels in electromagnetic spectrum whereas this is not applicable to matter energy.
What is wave energy?Wave energy is obtained from the water currents in the ocean and seas. The energy so harnessed is a renewable form of energy.
Wave energy is important as it provides enormous energy harvest. Waves have the high potential to generate energy on a mass scale. This energy can be utilized for energy production, water desalination etc. Special wave energy converters are available for this purpose.
Wave energy will reduce the dependence on fossils for energy. It can be considered as a reliable source to obtain energy using wave power. However, it is an expensive way and also requires high maintenance.
Wave energy is also weather dependent. As disturbances in the weather affect the energy production.
Thus, waves can be considered as an important source of renewable energy on earth.
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How long will it take Barium-142 to decay to 25% of its original size?
HURRY AND ANSWER GIVING BRAINLY!!
Answer:
5.68
Explanation:
just divide. hope this helps!
The process of erosion or landscape is an example of positive feedback. Can you describe a Feedback group that explains this process in more detail, starting with a feedback between plant, humus, and at least one more node in the network? hint: you will need to add more than one negative feedback
Answer:
The feedback mostly on the scenario mentioned is defined downwards.
Explanation:
There seem to be forces that regulate the whole mechanism as well as preserve equilibrium in every natural cycle. It is possible to divide these variables into two simple types:
Negative PositiveThe improvement throughout the natural state is attempted by negative factors as well as the positive reinforcement attempts to mitigate this improvement and approach the problem to something like the primary comfortable position.
Throughout the present situation, erosion seems to be a constructive response throughout the landform transition scenario. This additional elevation is neutralized either by the extrusion process because as landmass becomes lifted by another process. Currently, due to the extreme interplay of several other variables, this shift in landscape height can start happening. The increased height including its landform may be caused by structural elongation of both the rock body. Another mechanism that will act to improve height becomes isostatic equilibrium.So, throughout the context of landform transition, there are several forms of negative comments. The quantity of surface accessible at this site also improves as even the landmass becomes increased. As a consequence, this additional area will be filled by new occupants. Plants as well as other species may be in certain habitats. Whenever these organisms inhabit the location, the organic chemistry created by them often induces biological weathering including its rock. This again serves as a force for the shift in the landform. This excessive precipitation induces some significant erosion at either site. Finally, this reduces the elevation including its landmass and preserves the landform's primary stabilization thereby concludes the circle.Let's take a basic example including its process for suggestions. Users start whimpering if you get too cold. Your body continues to pump additional blood attributable to the whole shivering and indeed the temperature therefore raises. Throughout this circumstance, the temperature drop is a mechanism that serves to initiate the shivering, as well as the shivering attempts to recover the steady body’s temperature. Therefore the shivering case seems to be positive feedback that seeks to restore the primary balance.
Much the same for the landmass uplifting allows the emergence of more life above it. So, social advancement seems to be a system of negative criticism that disturbs the equilibrium. After that, the main elevation of the landform needs to regain the excess volume of degradation. So, this is indeed a tool for constructive feedback.
Why can’t an atom lose or gain a proton
The electrons can jump shells by releasing/gaining energy. If an atom develops a positive charge, how could it have happened? It couldn't possibly have taken on additional protons because protons and neutrons are bound by the strong nuclear force, which keeps the nucleus stable.
Which event most likely occurs at point v? cooling erosion heating melting
The event which most likely occurs at point V during a rock cycle is cooling.
What is point V?Point V is present in the rock cycle, where changes in the state or nature of rock takes place.
When mangma comes towards the surface of the earth then due to change in temperature and pressure it will concerts into the igneous rock by cooling process and coverts into the harder form.
Hence at point V, colling is occur.
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Answer:
A. cooling
Explanation:
edge 22'
Assuming your weight is 440.55 N and the force of gravity on Earth is 9.8 m/s2 what is your mass? *
Answer:
44.95408163 kg
44.95 kg (2 decimal places)
Explanation:
Weight=Mass*Gravity
440.55=m*9.8
Make m the subject
M=440.55/9.8
M= 44.95 kg
Write the steps for an IONIC BOND for KCI.
Answer:
Potassium chloride, KCl , is an ionic compound formed by the electrostatic force of attraction that holds the potassium cations and the chlorine anions together. Potassium, K , is located in group 1 of the Periodic Table.
Explanation:
thanks
Choose the atom with the larger first ionization energy.
Select one:
a. Silicon
b. Tin
Answer:
ACTUALLY the correct answer is
helium
Which chemical is necessary for a cell to go through aerobic respiration instead of anaerobic respiration?.
Answer:
Oxygen
Explanation:
Aerobic respiration specifically requires oxygen, but anaerobic respiration does not.
Which best describes what is happening in the diagram?
At point 1, the air in the convection current is warmer and denser than at point 3 because its molecules contain more kinetic energy.
At point 2, the air absorbs thermal energy from the surrounding air, which causes it to become heavier and sink.
At point 3, the air in the convection current is cooler and lighter than the air in other parts of the current, so it is preparing to rise.
At point 4, thermal energy from warm air over the land is transferred upward toward cooler areas of the atmosphere.
Answer: its D. At point 4, thermal energy from warm air over the land is transferred upward toward cooler areas of the atmosphere
Explanation:
why do we test for the presence of indole rather than pyruvic acid as the indicator of trytophanase activty
How many calories of energy will 20 grams of carbohydrates provide if 1 gram provides 4 calories?
PLEASE COMMENT YOUR ANSWER .
Answer:
i already commented it but i want points anyways its 80 because 20x4 = 80. it said one gram equals 4 calories and there is 20 grams so basically 4+4+4+4+4+4+4+4+4+4+4+4+4+4+4+4+4+4+4+4
20 grams at 4 calories per gram.
20*4=80 Calories.
in the end, A is your answer
Matter has two basic properties: physical properties and
chemical properties. Which of these statements best
describes physical properties?
A) Physical properties behave identically for all matter under
the same conditions.
B) Physical properties can be observed without changing the
identity of a substance.
C) Physical properties are observed by seeing how a
substance reacts with other substances.
D) Physical properties cause atoms and molecules to change
structure when substances are mixed.
Answer:
B
Explanation:
Physical property can be observed without changing the property of substance for example it color, density, and etc.
Chemical property is what C explains as it is how it reacts with other substance
Answer:
physical properties are the can be seen
Explanation:
Example.one physical property of iodine is cluster like when it is solid