Answer:
Explanation:
D is the answer
Each kind of atom has a characteristic difference in energy levels for electrons, this property accounts for the fact that atoms can be identified by an examination, therefore the correct answer is option D.
What is the photoelectric effect?It is the process of emission of electrons from the material because of absorption of electromagnetic radiation in form of photons of light waves.
The photoelectric effect explains the particle behavior of the light waves.
Each kind of atom has a characteristic difference in energy levels for electrons this fact can be used to identify the different atoms by using inspection.
Thus, the correct answer is option D.
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What is an electrolytic cell?
A. A cell with a negative cell voltage
OB. A cell with a spontaneous redox reaction
C. A cell with a positive cell voltage
D. A cell that has a salt-bridge connection
Answer:
A. A cell with a negative cell voltage
Explanation:
other answer is wrong
An electrolytic cell is a cell with a spontaneous redox reaction (option B).
What is an electrolytic cell?Electrolytic cell is an electrochemical cell that utilizes an external source of electrical energy to force a chemical reaction that would otherwise not occur.
An electrolytic cell converts electrical energy into chemical energy. The redox reaction in the cell occurs spontaneously and is responsible for the production of electrical energy.
Therefore, according to this question, option B is correct.
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during June , earth is 152,000,000km from the sun. how far is earth from the sun in miles
Answer:
94448421.2201
Explanation:
multiply the value in kilometers by the conversion factor '0.62137119223684'.
So, 152000 kilometers = 152000 × 0.62137119223684 = 94448.42122 miles.
a) Give the reaction that occurs when 1 gram of sodium is added to 100 ml of ethanol.
b) This solution is then heated with 5 grams of 1-bromobutane. What is the maximum yield of the final product from this reaction?
A book is held against a wall by applying a force perpendicular to the surface of the book. In a free body diagram of all of the forces acting on the book, what force would keep the book from sliding down the wall? A. force of hand B. force of gravity C. friction force D. normal force
In a free body diagram of all of the forces acting on the book, the force which would keep the book from sliding down the wall is; Choice A: Force of hand.
In modern mechanics, it is noteworthy to know that the normal force, F(n) is the component of a contact force which is perpendicular to the surface that an object contacts.In this instance, the surface which the object contacts is the wall.
It has however been stated within the question that;
A book is held against a wall by applying a force perpendicular to the surface of the book.In conclusion, the force which keeps the book from sliding down the wall is the force of the hand which is perpendicular to the object's surface of contact.
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Answer:
FORCE OF HAND
What does it mean to say that a wave is cyclic, or periodic, disturbance?
Answer:
Wave is a disturbance or energy that propagate through medium from one point to other point
So basically it is a flowing energy that flows into the medium and hence medium particles start oscillating about their mean position to and fro.
This motion of medium particles or this to and fro motion is about their mean position and this will always be cyclic or periodic motion
This means the disturbance or energy continuously flow through the medium such that it will change the position of medium particle and this will be cyclic in order
For an example
y(x,t) = Asin(kx - ωt + φ)
So here above equation of wave is a travelling wave in which displacement of medium particle from its mean position is given by "y"
Now we can see that this disturbance depends upon the sine function and it will repeat its same position after every 2 pi time interval as it is cyclic function for this value
Due to this phenomenon of repetition of its same position we can say that it is disturbance of wave is cyclic.
Explanation:
help please please please please please
Answer:
wow only six points, you have to amp it up a little
Explanation: because
half of the earth is in the light and the other half is in the shadow because
Answer:
the sun doesn't shine on that half
Explanation:
Determine mass contribution for the following isotopes of the same element.
At the end, tell me the atomic mass of the element using the mass contributions.
Do not forget your units or the question will be marked incorrect.
Isotope 2 amu: 186.956
percent abundance: 62.6%
Atomic Mass of the element ?
Answer: Not possible to find average amu with only the information provided.
Explanation:
Is there more information about the other isotopes? I don't see how one could calculate an overall atomic mass with only one isotope is known. An isotope of 186.956 with abundance of 62.6% isn't enough information. We're not told anything about the other isotopes: are they larger, smaller, and at what percentage. If one has an amu of 204.956 at 37.4%, the overall atomic mass would be quite different than if it had an atomic mass of 182.956 at 37.4%. More infornmation is required.
H2F5BLi
How many atoms are in the chemical formula?
Answer:
eight atoms
hope it helps
when two or more elements are combined, the substance produced is a:
A compound is formed when two or more elements are chemically combined.
Ex: [tex]H{2}O[/tex]
A mixture is formed when two or more elements and/or compounds are physically combined.
Ex: [tex]NaCl + H{2}O[/tex]
when using a ph meter to monitor a stirring reaction mixture, where should you place the ph sensor electrode?
Answer:Between the stirring vortex and the side of the glassware
When using a ph meter to monitor a stirring reaction mixture, the ph sensor electrode
should be placed;
between the stirring vortex and the side of the glassware.
The pH meter is an electric device that is used to measure the hydrogen-ion activity in water-based solutions. This means that it is used to measure the PH which is the acidity or alkalinity.
The pH meter is made up of a voltmeter attached to a pH-responsive electrode and a reference electrode.
Now, this pH-responsive electrode is usually made of glass while the reference electrode is usually a silver–silver chloride electrode.
Now when monitoring the stirring reaction mixture, the PH-responsive electrode written above is usually placed between the stirring vortex and the side of the glassware.
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Helpppppppppppppppppppp
Answer:
option B it was captured by earth's gravity
Explanation:
please Brinlmark me please
Please help!!!
When magnesium hydroxide, Mg(OH)2, is added to water it...
Select one:
a. falls to the bottom of the beaker undissolved.
b. reacts with the water to form Mg(OH)4
c. produces an acidic solution.
d. dissociates into Mg+2 and (OH)4
Answer:
B
Explanation:
i think it is b Intermediate Mg(OH) reacts with H2O to form the reaction products H2 and Mg(OH)2. There are two kinds of reaction channels.
How is a beta particle formed?
Answer:
forms when a neutron changes into a proton and a high-energy electron .
hope this helps <3
is CuCl2 polar or nonpolar ?
raw or undercooked shellfish may be contaminated with what type(s) of bacteria
vibrio vulnificus
salmonella
vibrio vulnificus and vibrio parahaemolyticus
Answer:
vibrio vulnificus and vibrio
Explanation:
Answer:
vibrio vulnificus and vibrio parahaemolyticus
Which of the following describes a low viscosity liquid
Answer:
a liquid that is thick and sticky
Explanation:
Physical Models Activity (I need help)
You have explored some interesting, informative, and amusing examples of models. Now it's time to get creative and make your own model. Here is the requirement checklist for your model:
✔ Model types can include drawings, diagrams, physical models, virtual simulations, or videos.
✔ Models must be created by you, not something selected from an online or outside source.
✔ Submit a presentation, picture, video, or screenshot of your model.
✔ Submit a one-paragraph summary describing the topic you chose, your model, what it represents, how you made it, and the specific science involved. It is important that you are using science terminology and are accurate.
Now that you know how to create and submit your model, you will need to choose a topic for your model. Choose one of the three topics listed below. Select each topic for an overview.
Conservation of Mass
Atomic Theory
Thermal Energy
The question above wants to assess your ability to create a model to represent a scientific concept. In that case, I can't create the model for you, but I'll show you how to create that template.
First, you must choose one of the topics presented in the question. I suggest that you choose the topic "Conservation of Masses," because of its simplicity, however you should choose the one you are most familiar with.
Next, you should research this topic and look at the factors that make it up.
After that, you can create your template as follows:
Use a software that has ready-made drawings, mainly geometric figures, for you to represent the elements that make up this topic.Use these drawings to represent these elements, place titles that identify them, and add arrows, which direct the viewer's attention to understand the model.You can see examples of "Conservation of Masses," models in the attached figure.
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In an experiment to determine how to make sulfer trioxide, a chemist combines 32.0g of sulfer with 50.0g of oxygen. She finds that she made 80.0g of sulfer trioxide and had 2.0 g of leftover oxygen. How would the chemist make 100.0 g of sulfer trioxide so that she has no leftovers?
Explanation:
i Forgot the answer sorry but ihave that modulehow much muriatic acid to lower alkalinity in pool
Answer:
One gallon of muriatic acid
Explanation:
i think
Help me pls I will mark you as brain
Answer: Is it sewage checks
what is the maximum receiving temperature for tcs in degrees fahrenheit
Explanation:
135F is the temperature
The maximum temperature that a TCS dishes can hold is 135° C and 275 Fahrenheit.
What is TCS dishes?Time/temperature control safety is a measurement of the temperature hold capacity of certain food, such as meat, fish, dairy, cream and custard products.
Thus, the maximum temperature that a TCS dishes can hold is 135° C and 275 Fahrenheit.
Learn more about TCS dishes
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How do I do unabbreviated electron configurations?
Answer:
In shorthand electron configuration, the electron configuration starts with the symbol of the noble gas in the previous period, followed by the additional configuration of the electrons for the given element. For example, aluminum has the atomic number 13, which is the number of protons in the nuclei of its atoms.
if you need more help go to you-tube and search up Abbreviated Electron Configurations and it's by EisleyChem
Max Plank created the idea of quanta4 or quantum energy. This is?
Answer:
A theory of physics in which energy exists only in discrete quantities, called quanta. It was originated in 1900 by the German physicist Max Karl Ernst Ludwig Planck (1858–1947), who suggested that electromagnetic radiation is quantized, i.e. it can be emitted or absorbed only in tiny packets, not continuously.
Explanation:
as the temperature of a gas sample at constant pressure increases, the volume of the gas will _____ and there will be _____ gas particles in the same space. the density of a gas at constant pressure therefore _____ as the temperature increases.
Answer:
Increase
Less/low number
Lessen
Explanation:
Increase > Increase in temperature cause increase in volume.
Less/low number > As volume increases the number of particles to be adjusted in the same space will be lesser than before.
Lessen> At constant pressure as increase in temperature cause increase in volume so the density will lessen due to increase in volume. Density equation is given below.
Density = mass /volume
If volume increases density will get lowered.
What is the last step in the scientific method?
Answer:
D. Communication of results
Answer:
b.
conclusion
because it gives the overall information about the experiment
What isotope forms when radon-215 emits two alpha particle and three gamma rays
why are magnesium fluoride and calcium allowed in water
Answer:
calcium allowed in
Explanation:
Why are magnesium, fluoride, and calcium allowed in water?
✓ They’re naturally occurring elements in many springs & aquifers used for water supply purposes - calcium and magnesium are also essential minerals
Is table sugar(sucrose) a substance or a mixture
Answer: its a compound
Emma strikes a match and sets some logs on fire. As the fire burns, which two forms of energy are released?
Answer:
Explanation:
There are changes in the chemical composition of the word.
There's light energy given off.
There's heat energy given up.