Mole (mol): the amount of material counting 6.02214 × 1023 particles. The value of the mole is equal to the number of atoms in exactly 12 grams of pure ... A silver ring contains 1.1 x 1022 silver atoms. How many moles of silver are in ... Answers. 1. (a) 2.26 × 10. 24 silver atoms; (b) 1.42 × 10. 24 xenon atoms (c) 3.07 × 10.
Explanation:
HELP PLS, ILL GIVE BRAINLIEST, 100 POINTSAbove is the word equation for photosynthesis. Respiration is another biochemical process that takes place within animals. The molecules involved in photosynthesis and respiration are water (H2O), carbon dioxide (CO2), oxygen (O2) and glucose (C6H12O6).
Select the equation below that best represent the process of photosynthesis.
Select one:
A.
B.
C.
D.
Answer:
C
Explanation:
Answer:
A.)
Explanation:
Identify the scientist associated with each major contribution to the development of atomic theory. He discovered the electron. He discovered periodic changes in properties of elements when they are listed in order of their atomic weights. He experimented with the deflection of cathode rays by a magnetic field. He carried out experiments, using gold foil, that measured the scattering of positively charged alpha particles by heavy atoms. He proposed that atoms are the basic units of matter. He proposed the model of the atom had most of its mass concentrated in a very small nucleus. He proposed that in a chemical reaction, atoms are neither created nor destroyed. Answer Bank
Answer:
He discovered the electron- J.J Thompson
He discovered periodic changes in properties of elements when they are listed in order of their atomic weights- Dimitri Mendeleev
He experimented with the deflection of cathode rays by a magnetic field- J.J Thompson
He carried out experiments, using gold foil, that measured the scattering of positively charged alpha particles by heavy atoms- Ernest Rutherford
He proposed that atoms are the basic units of matter- John Dalton
He proposed the model of the atom had most of its mass concentrated in a very small nucleus- Ernest Rutherford
He proposed that in a chemical reaction, atoms are neither created nor destroyed-John Dalton
Explanation:
J.J Thompson was the discoverer of the electrons. He also worked hard to show that they were negatively charged particles after he experimented with them using a magnetic field. He named them cathode rays.
Dimitri Mendeleev found that, when all the known chemical elements were arranged in order of increasing atomic weight, the resulting table displayed a recurring pattern, or periodicity, of properties within groups of elements(Encyclopedia Britannica).
Ernest Rutherford demonstrated by experiment using a thin gold foil and alpha particles that the atoms are composed of a positive massive core called the nucleus.
John Dalton proposed that matter is composed of atoms. Also, in a chemical reaction, atoms are neither created nor destroyed.
Perform each conversion
5.88 dL to liters
Answer:
5.88 dL = 0.588 litre
Explanation:
We need to find a conversion from 5.88 dL to liters.
We know that the conversion is as follows :
1 deciliter = 0.1 litre
To find 5.88 dL to liters, we use the unitary method. So,
5.88 dL= (0.1×5.88) litre
5.88 dL = 0.588 litre
So, there are 0.588 liters in 5.88 dL.
Al
Express your answer as an integer.
Z=
Atomic number is denoted by 'Z' which is the atomic number of an element and Z=13 for aluminium , the atomic number of aluminium.
It is defined as a substance which cannot be broken down further into any other substance. Each element is made up of its own type of atom. Due to this reason all elements are different from one another.
Elements can be classified as metals and non-metals. Metals are shiny and conduct electricity and are all solids at room temperature except mercury. Non-metals do not conduct electricity and are mostly gases at room temperature except carbon and sulfur.
Aluminium has 13 protons and thus it's atomic number that is 'Z' is equal to 13.
Thus, 'Z' which is the atomic number of an element and Z=13 for aluminium ,the atomic number of aluminium.
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Which color marks the places on the map where the continental shelf is most likely found?
Answer:
blue
Explanation:
A biologist explored a remote island and discovered a new living organism. After several observations were made of the
organism, the biologist claimed that it was a vascular plant. His notes are listed below.
"I have found a new organism during my explorations. The organism was found low to the ground and is green. Based on
experiments, the organism seems to require sunlight to survive. Small, oval seeds were
found on the organism; they grew
into identical organisms when put in the soil. The organism had sharp spikes around the main body, most likely for
protection. The organism was able to absorb water from the surrounding soil. It was also observed that the organism used
specialized veins to carry water throughout its body. Based on these observations and experiments, I have determined that
this organism is a vascular plant."
Which of the following observations LEAST supports his claim?
A)
The organism is low to the ground.
B)
The organism reproduces with seeds.
The organism requires sunlight.
D)
The organism was able to transport water through specialized veins.
3. If the sun heats my car from a temperature of 20.0 C to a temperature of 55° C, what will the
pressure inside my car be? Assume the pressure was initially 570 mmHg.
FORMULA:
Answer:
I would try but i just need points good luck tho
wright it in 500 words Submit your persuasive essay about nuclear power. Remember to proofread your work before submitting.
Answer:
Explanation:
Introduction Paragraph. Hook. Background Points. Thesis Statement.( done)
Body Paragraph. Topic Sentence. Supporting fact 1. Supporting fact 2. Transition Sentence.(done)
Conclusion Paragraph. Re-statement of Thesis. Summary of Main Point. Challenge to the Reader.( done)
What should a consumer consider when shopping for a credit card? Check all that apply.
Answer:
B. the initial fees to open the account
C. the fees charged for late payments
E. the annual percentage rate for the card
Explanation:
Edg
Rotation about C-C single bonds allows a compound to adopt a variety of _____________. conformations configurations formations isomers projections are often used to draw the various conformations of a compound. conformations are lower in energy, while conformations are higher in energy. The difference in energy between staggered and eclipsed conformations of ethane is referred to as strain. strain occurs in cycloalkanes when bond angles deviate from the preferred °. The conformation of cyclohexane has no torsional strain and very little angle strain. The term "ring flip" is used to describe the conversion of one conformation into the other. When a ring has one substituent the equilibrium will favor the chair conformation with the substituent in the position.
Answer:
Conformation
Explanation:
Conformation refers to "any of the spatial arrangements which the atoms in a molecule may adopt and freely convert between, especially by rotation about individual single bonds"(Oxford dictionary).
Carbon-Carbon single bonds are known to undergo rotations about its axis. These rotations leads to various conformations. The energy difference between conformations may be low or high depending on the structure of the molecule. The difference in energy between conformations determines a molecules's preferred conformation.
Which of the following is an ionic bond?
Answer:
thats the answer I hope it helps you
54.1miles/gallons how many liters of gas will be consumed traveling 132 km
Answer:
5.75 L.
Explanation:
From the question given above, the following data were obtained:
Rate = 54.1 miles/gallons
Distance = 132 km
Volume (in L) consumed =?
Next, we shall convert 132 km to mile. This can be obtained as follow:
1 km = 0.621 mile
Therefore,
132 km = 132 km × 0.621 mile / 1 km
132 km = 81.972 mile
Next, we shall determine the volume (in gallons) of the gas needed. This can be obtained as follow:
Rate = 54.1 miles/gallons
Distance = 81.972 mile
Volume (in gallon) =?
Rate = Distance / volume
54.1 = 81.972 / volume
Cross multiply
54.1 × volume = 81.972
Divide both side by 54.1
Volume = 81.972 / 54.1
Volume = 1.52 gallon.
Finally, we shall convert 1.52 gallon to litre (L). This can be obtained as follow:
1 gallon = 3.785 L
Therefore,
1.52 gallon = 1.52 gallon × 3.785 L / 1 gallon
1.52 gallon = 5.75 L
Therefore, 5.75 L of the gas will be consumed.
Explain the regiochemical outcome for chlorination of bromobenzene.
Ortho attack and para attack are preferred because each of these pathways involves a sigma complex with__________resonance structures. Attack at the meta position involves formation of a sigma complex with only___________ resonance structures. The reaction will proceed more rapidly via the____________ energy sigma complex, so attack takes place at the ortho and para positions in preference to the meta position.
Answer:
See explanation
Explanation:
In a chemical reaction, a particular reaction path may be favoured due to the fact that it is energetically more favourable(lower energy sigma complex is formed).
The more the resonance structures produced in a particular reaction pathway, the more energetically favourable it is.
In the chlorination of bromobenzene, ortho attack and para attack are preferred because each of these pathways involves a sigma complex with__4________resonance structures. Attack at the meta position involves formation of a sigma complex with only____3_______ resonance structures. The reaction will proceed more rapidly via the_____lower_______ energy sigma complex, so attack takes place at the ortho and para positions in preference to the meta position.
Select the correct answer
Which hand is negatively charged?
Option B is the correct answer .
What is Charge ?
Charge is a basic property of matter that is associated with the presence or absence of electrons. Objects can have positive or negative charge, or they can be neutral, which means they have an equal number of positive and negative charges. In physics, charge is one of the fundamental concepts used to explain the behavior of matter and energy in the universe. The interaction between charges is described by Coulomb's law, which states that the force between two charges is proportional to the product of their charges and inversely proportional to the square of the distance between them.
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an affect of climate change that is a hydrometeorological event
Answer:
An another result of climate change is the increasing in the frequency of high intensity rainfall events,which increase the regional water damage events.If the precipitation volume decreases in summer time and increases in winter time,then it will be lower infiltration and more runoffs.
Severe hydro-meteorological activities, including heavy precipitations or lack thereof, floods, and droughts, are becoming greater excessive and common because of weather exchange and can strongly affect water first-rate.
What are the common impact of hydrometeorological hazards on the environment?Hydrometeorological hazards, such as floods, droughts, landslides, and hurricane surges, can pose an instantaneous risk to lives and impact livelihoods by way of detrimental and destroying transport links, power components, agencies, and agricultural land.
Hydrometeorological dangers are a result of extreme meteorological and climate events, along with floods, droughts, hurricanes, tornadoes, landslides, or mudslides.
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Use the Henderson-Hasselbalch equation, eq. (3), to calculate the pH expected for a buffer solution prepared from this acid and its conjugate base, assuming: the mass of the weak acid is 0.2 g and the mass of the conjugate base is 0.2 g will be added to 25 mL of water. Also assume the molar mass of the weak acid is 234 and its conjugate base is the sodium salt.
Answer:
[tex]pH=4.56[/tex]
Explanation:
Hello there!
In this case, given the Henderson-Hasselbach equation, it is possible for us to compute the pH by firstly computing the concentration of the acid and the conjugate base; for this purpose we assume that the volume of the total solution is 0.025 L and the molar mass of the sodium base is 234 - 1 + 23 = 256 g/mol as one H is replaced by the Na:
[tex]n_{acid}=\frac{0.2g}{234g/mol}=0.000855mol\\\\n_{base}= \frac{0.2g}{256g/mol}=0.000781mol[/tex]
And the concentrations are:
[tex][acid]=0.000855mol/0.025L=0.0342M[/tex]
[tex][base]=0.000781mol/0.025L=0.0312M[/tex]
Then, considering that the Ka of this acid is 2.5x10⁻⁵, we obtain for the pH:
[tex]pH=-log(2.5x10^{-5})+log(\frac{0.0312M}{0.0342M} )\\\\pH=4.60-0.04\\\\pH=4.56[/tex]
Best regards!
50 POINTS WILL MARK BRAINLIEST
If the actual yield of sodium carbonate is 9.34g, what is the percent yield of Na2CO3?
Answer: expalin
Explanation:
Which element has a larger atomic size? Nitrogen or phosphorus, explain how you know.
Explanation:
The elements nitrogen and phosphorus are in the same Group 15 with nitrogen being higher, so for the neutral atoms, N with its outer electrons in the n = 2 level would have a smaller radius than P with its outer electrons in the n = 3 level. ... (a) N3- has the largest radius.
On the periodic table, nitrogen and phosphorus can both be found in group 15, with nitrogen in period two and phosphorous in period three. This indicates that phosphorus has more electron shells occupied than nitrogen. Thus, nitrogen's atomic size will be lowered.
What is atomic size ?A chemical element's atomic radius, which is typically the average or typical distance between the nucleus's core and the outermost isolated electron, serves as a gauge for the size of an atom. Considering that the boundary is not a clearly defined physical object.
Atomic radii in the periodic table decrease across a row from left to right and increase across a column from top to bottom. Due to these two patterns, the periodic table's lower left and upper right corners, respectively, contain the largest and smallest atoms.
The size of the atom or ion is determined by the size of the largest filled orbital because electrons are what occupy space in atoms.
Thus, nitrogen's atomic size will be lowered.
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What is a good example of food waste that can be added to compost?
O oil
O chicken breast
O eggshells
Oyogurt
Salts when dissolved in water releases
Water molecules pull the sodium and chloride ions apart, breaking the ionic bond that help them together.After the salt compounds are pulled apart ,the sodium and chloride atoms are surrounded by water molecules,as this diagram shows.Once this happens,the salt is desolved,resulting in a homogeneous solution
How many days are there between a Spring Tide and neap tide
Answer:
≃ to 7 days
Explanation:
Gooogle doesn't lie, hahaha :)
A wave is a ______ that carries ______ from one place to another?.
Answer: disruption and energy
Explanation:
Answer: disturbance; energy
Explanation:
Describe how and why the statue of the Sphinx has changed since it
was made.
Answer:
I don't know if this will help but. The Great Sphinx has suffered from erosion and vandalism. Hatshepsut's stepson was too young to rule at the time of her husband's death, so she just took the job.
What is the correct ionic charge for a barium atom
Convert 0.859 mg to cg.
Help me plz :(
Answer:
0.0859
Explanation:
What is the formula for tin (II) nitrite?
Answer:
tin nitrite Formula:Sn(NO2)2
The formula for tin (II) nitrite Sn(NO2)2.
What is Molecular formula?Two atoms together chemically form a molecule. The chemical formula for a molecular compound's molecular formula lists the variety of atoms that make up the molecule.
A subscript under oxygen in CO2, for instance, indicates that there are two oxygen atoms present, but a subscript under carbon indicates that there is just one carbon atom present.
A nitronium salt is produced when tin(IV) nitrate and trifluoroacetic acid anhydride combine. Trifluoroacetic acid produces a similar molecule when it is solvated with it.
The number of each atom contained in a given molecule is indicated by the molecule's molecular formula. In essence, it is a list of the elements that are present in a molecule and how many of each there are.
Therefore, The formula for tin (II) nitrite Sn(NO2)2.
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10)
What is the function of phloem tissue in the plant transport system?
A)
It prepares food
B)
It transports food.
C)
It transports water.
D)
It provides support
12. What power do you start when using a microscope?
Extra high power
Low power
Medium Power
d. High Power
moralenses
When focusing on a slide, ALWAYS start with either the 4X or 10X objective. Once you have the object in focus, then switch to the next higher power objective. Re-focus on the image and then switch to the next highest power.
What was the Copernican revolution?
Answer:
Explanation:
Copernicus proposed that the Earth is not the center of the solar system, and that the Sun is the center. It's called heliocentric. He wrote a book summarizing all his ideas called De Revolutionbus. The Copernican Revolution though, is when a majority of the people started taking his ideas seriously and a major shift happened in what people think about the solar system.
Answer:the discovery that the earth revolves around the sun
Explanation:
20 point, pls help. A 5.50 mole sample of a gas has a volume of 2.50 L. What would the volume be if the amount increased to 11.0 moles?
At constant temperature and pressure, If the amount of gas increases to the given value, its volume also increases to 5L.
What is Avogadro's law?Avogadro's law states that "equal volumes of all gases, at the same temperature and pressure, have the same number of molecules."
It is expressed as;
V₁/n₁ = V₂/n₂
Given the data in the question;
Initial amount of gas n₁ = 5.50molesInitial volume v₁ = 2.50LFinal amount of gas n₂ = 11.0molesFinal volume v₂ = ?We substitute our values into the expression above.
V₁/n₁ = V₂/n₂
V₁n₂ = V₂n₁
V₂ = V₁n₂ / n₁
V₂ = (2.50L × 11.0moles) / 5.50moles
V₂ = 27.5molesL / 5.50moles
V₂ = 5L
Therefore, at constant temperature and pressure, If the amount of gas increases to the given value, its volume also increases to 5L.
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