Answers
Answer:
the nucleoid
Explanation:
Related Questions
In IR spectroscopy, a primary amine will produce two signal(s) above 3300 cm-1, because the amino group ________________________.
Answers
A primary amine will produce two signal(s) above 3300 [tex]cm^1[/tex], because the amino group has two possible modes of stretching (symmetric and asymmetric)
What is IR?Infrared radiation (IR), sometimes referred to simply as infrared, is a region of the electromagnetic radiation spectrum where wavelengths range from about 700 nanometers (nm) to 1 millimeter (mm).
The N-H stretches of amines are in the region 3300[tex]cm^1[/tex].
These bands are weaker and sharper than those of the alcohol O-H stretches which appear in the same region.
In primary amines ([tex]RNH_2[/tex]), there two bands in this region, the asymmetrical N-H stretch and the symmetrical N-H stretch.
Hence, In IR spectroscopy a primary amine will produce two signal(s) above 3300 cm-1, because the amino group has two possible modes of stretching (symmetric and asymmetric).
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Which has the most thermal energy?
1 points
200 ml of cold water
200 ml of hot water
100 ml of hot water
100 ml of cold water
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is there enough oxygen for complete combustion?
Answers
Answer:
Complete combustion occurs when there is enough oxygen to completely use up all the reactants. Incomplete combustion occurs when there is not enough oxygen resulting in the production of smoke, and less energy is produced when compared with complete combustion.
Draw a complete enthalpy diagram for the following reaction: 4Na(s) + O2(g) → 2Na2O(s). H=-178kJ
Answers
The enthalpy change of the given reaction is negative, so the reaction is an exothermic reaction.
What is enthalpy change of a reaction?Enthalpy change of a reaction is the energy changes that occur when reactant molecules form products.
Enthalpy is the heat content of a substance.
When enthalpy change is positive, the heat content of the product is greater than that of the reactant and the reaction is an endothermic reaction.
Whereas, when enthalpy change is negative, the heat content of the reactant is greater than that of the product and the reaction is an exothermic reaction.
Therefore, since the enthalpy change of the given reaction is negative, the reaction is an exothermic reaction.
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The diagram depicts the flow of
water through a dam. The flow
of water causes the turbine
blades to turn. This, in turn,
causes : generator to provide
energy to the power lines.
Which of the flowcharts best
outlines the conversion of
energy
A) chemical energy to kinetic
energy to electrical energy
B) Solar energy to mechanical
energy to electrical energy
C) kinetic energy to mechanical
energy to electrical energy
D) mechanical energy to
electrical energy to kinetic
energy
Answers
Question:
the initial pressure of a 4.0 l sample of helium gas is measured to be 12 atm.
if the pressure of the sample is reduced 3.0 atm, what is the resulting volume?
options:
a. 12l
b. 16l
c. 1.0 l
d. 9.0 l
Answers
Answer:
B
Explanation:
Recall the ideal gas law:
[tex]\displaystyle PV = nRT[/tex]
Because n, R, and T remain constant, we can rewrite the equation as:
[tex]\displaystyle k = P_1V_1 = P_2V_2[/tex]
Where k is some constant. This form of the ideal gas law is referred to as Boyle's Law.
Substitute and evaluate:
[tex]\displaystyle \begin{aligned} (4.0\text{ L})(12\text{ atm}) & = (3.0\text{ atm})V_2 \\ \\ V_2 & = 16\text{ L} \end{aligned}[/tex]
In conclusion, the answer is B .
A 115.0-g sample of oxygen was produced by heating 400.0 g of potassium chlorate. 2kclo3 right arrow. 2kci 3o2 what is the percent yield of oxygen in this chemical reaction? use percent yield equals startfraction actual yield over theoretical yield endfraction times 100.. 69.63% 73.40% 90.82% 136.2%
Answers
The percentage yield of oxygen obtained from the reaction, given that 400 g of potassium chlorate was heated is 73.4%
Balanced equation2KClO₃ —> 2KCl + 3O₂
Molar mass of KClO₃ = 122.5 g/mole
Mass of KClO₃ from the balanced equation = 2 × 122.5 = 245 g
Molar mass of O₂ = 32 g/mole
Mass of O₂ from the balanced equation = 3 × 32 = 96 g
SUMMARY
From the balanced equation above,
245 g of KClO₃ decomposed to produce 96 g of O₂
How to determine the theoretical yieldFrom the balanced equation above,
245 g of KClO₃ decomposed to produce 96 g of O₂
Therefore,
400 g of KClO₃ will decompose to produce = (400 × 96) / 245 = 156.7 g of O₂
How to determine the percentage yield Actual yield of O₂ = 115 gTheoretical yield of O₂ = 156.7 gPercentage yield =?Percentage yield = (Actual /Theoretical) × 100
Percentage yield = (115 / 156.7) × 100
Percentage yield = 73.4%
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Answer:
B. 73.40%
Explanation:
I AM JUST HIM
find out about the irish scientist, Robert Boyle and highlight his contributions to scientific concepts and ideas
Answers
Answer:
Known for his law of gases, Boyle was a 17th-century pioneer of modern chemistry. Every general-chemistry student learns of Robert Boyle (1627–1691) as the person who discovered that the volume of a gas decreases with increasing pressure and vice versa—the famous Boyle's law.
identify two ways recycling can reduce energy use?
Answers
Which describes interactions between substances and stomata during photosynthesis? Check all that apply.
Oxygen enters stomata.
Oxygen is released through stomata.
Carbon dioxide enters stomata.
Carbon dioxide is released through stomata.
Hydrogen enters stomata.
Hydrogen is released through stomata.
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During photosynthesis, Oxygen is released through stomata and Carbon dioxide enters stomata.
What is photosynthesis?Photosynthesis is defined as the process by which green plants use sunlight, water, and carbon dioxide to manufacture their own food in the form of sugar.
The stomata is a pore found on the leaves stem and roots which controls the movement of molecules in and out of the plant.
During photosynthesis, Oxygen is released through stomata and Carbon dioxide enters stomata.
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Answer:
The answer is B, and C
Explanation:
What is the molality of a solution in which 13.7 grams of nacl have been dissolved in 500 grams of water?
Answers
Answer: 0.5 M
Explanation:
molarity = (moles of solute)/(liters of solution)
To find liters of solution, we can convert the 500 grams of water to liters, which is 0.5 L.The formula mass of NaCl is about 58.44 g/mol, so 13.7 grams is about 13.7/58.44 = 0.234 mol.Hence, the molarity is (0.234)/(0.5) = 0.5 M (to 1 s.f.)
What happens when a saturated solution is further heated?
Answers
Answer:
If a saturated solution is heated to a higher temperature, it becomes unsaturated. Hence, the saturation point of a solution increases with the increase in temperature as there is an increase in solubility of the solute.
Explanation:
I hope this is able to help you! Please feel free to give feedback :)
24. Explain why a saturated solution is not necessarily a concentrated solution.
Answers
Answer:
A saturated solution may not be a concentrated solution IF the solute is only sparingly or slightly soluble in the solution.
which device requires electrical energy to produce a chemical change
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Electrolytic cell is the device which requires electrical energy to produce a chemical change.
What is an Electrolytic cell?This is referred to as electrochemical cell that requires an external source of electricity to effect a chemical change.
Without the source of the electricity, the chemical change won't have been produced at all.
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What is the compound N₂O3 called?
Answers
Answer:
Explanation:
Dinitrogen trioxide is a nitrogen oxide. Nitrogen trioxide appears as a blue liquid with a sharp, unpleasant chemical odor.
Description: Dinitrogen trioxide is a nitrogen oxide.ChEBINitrogen trioxide appears as ...
Synonyms: Dinitrogen trioxideNITROGEN TRIOXIDENitrogen oxide (N2O3)10544-7...
Molecular Formula: N2O3
Molecular Weight: 76.012 g/mol
Answer:
It is called Dinitrogen trioxide. Hope this helps!
Mention five characteristics of an ideal fuel
Answers
Answer:
Ideal fuel shows the following characteristics:
• It should be less expensive,
• It should be easily available,
• It should produce a large amount of heat,
• It can be transported easily.
• It has high calorific value.
• It should burns easily in air at a moderate rate.
Describe the problem you have chosen to investigate. Plan your investigation and write out the steps in your procedure. Include a sketch of your set up. Explain how this procedure and set-up will help you investigate the problem.
Answer:
Answer both asap for brainliest
Carry out your experiment. Present evidence that you have carried out the experiment below. You may upload photos as evidence. Record your data in a chart. Be sure you have starting data and several data points. Analyze your results. You may want to present your data as a graph. Did the investigation you planned determine the relationships among temperature, the energy transferred, the type of matter, the mass, and the change in the average kinetic energy of the particles as measured by the temperature of the sample? How do you know? Use complete sentences and paragraph form for your analysis.
Answers
Answer:
Six step guide to help you solve problems
Step 1: Identify and define the problem. State the problem as clearly as possible. ...
Step 2: Generate possible solutions. ...
Step 3: Evaluate alternatives. ...
Step 4: Decide on a solution. ...
Step 5: Implement the solution. ...
Step 6: Evaluate the outcome
Anders Celsius made the __________
discovery of atoms
barometer
Periodic Table of the Elements
Centigrade thermometer
Answers
Anders Celsius made the centigrade thermometer.
Express your opinion for or against the theory of evolution
Answers
Explanation:
Critics of evolution commonly appeal to past scientific hoaxes such as the Piltdown Man forgery. It is argued that because scientists have been mistaken and deceived in the past about evidence for various aspects of evolution, the current evidence for evolution is likely to also be based on fraud and error.
I answered all of the previous questions, but I'm not sure I understand questions 4 and 5, so I'm hoping you can assist me.
Answers
For 2. Look up what bonds the elements make when combined.
For 3. Look up the detention of the bond.
I hope this helps!
Fill in the blanks to create the lesson question, which is the broad question about gases that Boyle’s law answers. You will explore this question in the lab experiment.
Lesson Question: What is the effect of on the volume of a gas?
A. pressure
B. the number of moles
C. temperature
D. molecular structure
E. The mass of the Gas
Hypothesis: If the pressure on a gas is increased, then its volume will ..
A. Decrease
B. increase
C. Stay the same
D. fluctuate randomly
because the gas molecules will ...
A. scatter at random
B. Break apart
C. change into solid form
D. be pushed closer together
E. be pushed farther apart
Answers
Answer:
The kinetic energy would decrease with increasewhat is an unsaturated solution
Answers
Unsaturated solution: a solution in which more solute can be dissolved.
Explanation:
Salt dissolved in water or even sugar dissolved in water is an unsaturated solution if the quantity of dissolved salt/sugar is below the saturation point.
unsaturated solution: a solution in which more solute can be dissolved.
Explanation:
A solution in which the maximum amount of solvent has been dissolved. Any more solute added will sit as crystals on the bottom of the container.
A. Match the term with its definition. (1 point)
A. Frequency
B. Wavelength
C. Velocity
_____ The direction and speed at which a wave is traveling
_____ The distance between two adjacent wave peaks
_____ The number of waves passing a point in 1 second
B. What is the equation that illustrates the relationship between wave velocity, frequency, and wavelength? (1 point)
Answers
Taking into account the definition of wavelength, frecuency and propagation speed:
Frequency: The number of waves passing a point in 1 second.Wavelength: The distance between two adjacent wave peaks.Velocity: The direction and speed at which a wave is traveling.The equation that illustrates the relationship between wave velocity, frequency, and wavelength is v = f×λ.
WavelengthWavelength is the minimum distance between two successive points on the wave that are in the same state of vibration. It is expressed in units of length (m).
FrequencyOn the other side, frequency is the number of vibrations that occur in a unit of time. Its unit is s⁻¹ or hertz (Hz).
Propagation speed or velocityFinally, the propagation speed is the speed with which the wave propagates in the medium, that is, it is the magnitude that measures the speed at which the wave disturbance propagates along its displacement.
The propagation speed relate the wavelength (λ) and the frequency (f) inversely proportional using the following equation:
v = f×λ
All electromagnetic waves propagate in a vacuum at a constant speed of 2,998 x 10⁸ m / s, the speed of light.
Therefore, the previous expression establishes an inversely proportional relationship between the frequency and the wavelength: The higher the frequency, the lower the wavelength and when the frequency is lower, the greater the wavelength.
SummaryIn summary, the definition of frequency, wavelength and velocity are:
Frequency: The number of waves passing a point in 1 second.Wavelength: The distance between two adjacent wave peaks.Velocity: The direction and speed at which a wave is traveling.Finally, the equation that illustrates the relationship between wave velocity, frequency, and wavelength is v = f×λ.
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Part A The first step to engineering is to define the problem. Write down the problem the students have to solve, and describe the challenges they will face when coming up with a solution.
WILL MARK BRAINLIEST!!
Answers
Answer:
Engineering is all about solving problems using math, science, and technical knowledge. And engineers have solved a lot of problems in the world by designing and building various technologies. We have everything from machines that can breathe for you in hospitals to suspension bridges to computers we use every day. All of these things were once designed by engineers using the engineering design process.
Explanation:
Answer:
Students will have to use their brains to solve problems and challenges they will face to find a solution to cleaning up oil spills. Students will face failures after completing their solution, lots of research, and problems during the making of their solutions. What will work? What won't?
Explanation:
Hope this helps!
A species that has experienced a severe bottleneck event would be expected to _______. a. be better able to adapt to changing environmental pressures b. have few instances of inbreeding c. be more susceptible to disease and famine d. retain significant genetic diversity
Answers
Answer:
hi the answer is C
Explanation:
hope i helped :)
Answer:
be more susceptible to disease and famine
Explanation:
the planet saturn rotates much more rapidly than earth. this would affect the length of saturn's...
Answers
The planet Saturn rotates much more rapidly than earth, this would affect the length of Saturn's day and night.
How day and night occur?Day and night occur on any planet due to the rotation of the planet in its own axis with respect to the position of the sun.
As speed of planet Saturn is much more as compared to the speed of planet Earth. So occurring of day and night in the Saturn takes place faster as compared to earth.
Hence, length of day and night is get affected due to the fast movement.
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why is the ring around saturn
Answers
Answer:
Saturn's rings are made up of ice, dust, rocks, moons and other satellite that orbit the gas giant as its equator, where gravity is strongest.
Explanation:
Calculate the heat absorbed when 31.6 g of ice at 0°C is completely melted
Answers
Latent heat of fusion for ice is 33600J/k
Mass=31.6J/kHeat absorbed
k_f×m31.6×336001061,740mJ1061J1. How can the rate of a chemical reaction be controlled?
Answers
Answer:
it can be controlled by balancing of the reaction
the fastest train on earth, the TGV in france, can travel 800 miles in 2.5. what is the speed?
Answers
Answer:
s= 3.20 mph
Explanation:
s=t/d
s=380miles/5hours