Answer:
[tex]6.05211\times 10^{23}\ \text{atoms}[/tex]
Explanation:
Moles of carbon dioxide = 1.005 moles
[tex]N_A[/tex] = Avogadro's number = [tex]6.022\times 10^{23}\ \text{mol}^{-1}[/tex]
Number of atoms is given by
[tex]\text{Moles}\times N_A=1.005\times 6.022\times 10^{23}[/tex]
[tex]=6.05211\times 10^{23}\ \text{atoms}[/tex]
The number of atoms in the given amount of moles of carbon dioxide is [tex]6.05211\times 10^{23}\ \text{atoms}[/tex].
How many kJ are 3,340J?
options:
3,340,000 kJ
334,000 kJ
3.340 kJ
33.40 kJ
When coal is burned to produce electricity, the electrical energy produced is less than the
potential energy in the coal. Which best explains this observation?
A. As coal is heated, some of the molecules move so fast that they are destroyed.
B. Some of the energy in coal is destroyed by the intense heat required to release its potential
energy
C. Some of the potential energy in coal is converted into forms of energy other than electricity.
D. The amount of potential energy in fuels is overestimated.
Answer: it should be c or b
Explanation:
The statement that best explains this observation is that some of the energy in coal is destroyed by the intense heat required to release its potential energy. The correct option is B.
What is electricity?Electricity is light energy that is produced when charged atoms move through a closed wire made up of a substance. The motion of the charged particle produces electricity.
Here, when coal is burned to produce electricity it is less than potential energy because in making energy some amount of energy is lost in the form of heat and is released. The amount of electrical energy generated from burning coal is less than the coal's potential energy.
Thus, the correct option is B. Some energy in coal is destroyed by the intense heat required to release its potential energy.
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6. Besides hydrogen and the polyatomic ion ammonium, what type of element forms cations: metal, metalloid, non-metal?
Answer: Metals
Explanation:
When an atom accepts an electron negative charge is created on atom and is called as anion.
When atom loses an electron positive charge is created on atom and is called as cation.
The cation is formed by loss of electrons by metals and anions are formed by gain of electrons by non metals.
Thus metals form cations.
NEEED HELP PLEASE IM VERY STRESSED
Answer:
C) It moves faster and collects more data
Explanation:
Is the water found in the watershed clean and safe for drinking?
(No plagiarism & will give brainliest)
Which two statements describe what happens to the nuclei of atoms during a fusion reaction? O A. Large nuclei break apart into two or more smaller nuclei. O B. A small amount of mass in the nuclei that combine is converted to energy. O c. Each nucleus formed has fewer protons than each original nucleus had. O D. Nuclei with small masses combine to form nuclei with larger masses.
Answer:
D. Nuclei with small masses combine to form nuclei with larger masses.
B. A small amount of mass in the nuclei that combine is converted to energy
Explanation:
A nuclear fusion, in contrary to fission, is the process by which the nuclei of two atoms combine to form a much larger atom with a large nuclei. Likewise, during a fusion reaction, a large amount of energy is released from the small amount of mass in the nuclei (two) that combines.
According to this question, the following are true of a fusion reaction:
- Nuclei with small masses combine to form nuclei with larger masses.
- A small amount of mass in the nuclei that combine is converted to enormous energy.
Developing Scientific knowledge
Fill in each blank with the word that best completes the statement
Scientists develop knowledge by making
about the natural world that may lead to a
scientific question
A scientific question may lead to an)
which can be tested
The results of
can lead to changes in scientific knowledge.
Answer:
Scientists develop knowledge by making observation about the natural world that may lead to a scientific question.
A scientific question may lead to a(n) hypothesis which can be tested.
The results of experimentation can lead to changes in scientific knowledge.
Explanation:
In the process of developing scientific knowledge, scientists carry out series of observations on what happens in the natural world. This helps them to develop scientific questions. These scientific questions drawn can then lead to hypotheses which are testable.
The testing process leads to experimentation. It is in this process that much scientific questions receive answers. Testing actually lies at the core of scientific inquiry for all scientists. Whatever hypothesis made must always be tested.
The result of the testing or experimentation brings changes in scientific knowledge.
Pleaseeee help me
balance the following formula equation Al(s) + CuCl2 (aq) = AICI3 (aq) + Cu(s) Coloress
Answer:
[tex]2Al (s) + 3CuCl2( aq) --> 2AlCl3 (aq) + 3Cu(s)[/tex]
Explanation:
The main thing for this equation is to follow the amount on each side. Count each element on each side. Then by looking at the numbers figure out what numerical digit would make them equal.
For example:
On the left we have
Cu=1 and Cl=2.
But on the right we have
Cu=1 and Cl=3.
In order for them to be the same, we must add a coefficient of 3 to CuCl2 (aq0 on the left and a coefficient of 3 to Cu(s) on the right.
What type of reaction is...
(NH4)2CO3(aq) → NH3(g) + CO2(g) + H2O(l)
a. combustion
b. single replacement
c. synthesis
d. double replacement
e. decomposition
Answer:
d: double replacement
Explanation:
We have that for the Question "What type of reaction is...
(NH4)2CO3(aq) → NH3(g) + CO2(g) + H2O(l)
" it can be said that
(NH4)2CO3(aq) → NH3(g) + CO2(g) + H2O(l) is a decomposition reaction
Option E
From the question we are told
What type of reaction is...
(NH4)2CO3(aq) → NH3(g) + CO2(g) + H2O(l)
a. combustion
b. single replacement
c. synthesis
d. double replacement
e. decomposition
Generally
We have that a combustion is a reaction with oxygen to release energy a
it is in the form of
[tex]X+0_2 ---CO_2+H_2O[/tex]
double replacement
in this reaction two ionic compounds share ions to create two variant compounds with the same amount of ions
decomposition
This occurs when a compound is broken down into smaller compounds
Therefore
(NH4)2CO3(aq) → NH3(g) + CO2(g) + H2O(l) is a decomposition reaction
Option E
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Carbon dioxide goes into a plant's leaves when it's photosynthesizing is this an example of diffusion or osmosis or neither?
Answer:
diffusion
Explanation:
plants have stomata at the bottom of their leaves. these allow for CO2 to diffuse in and out of the plant.
Scientists are now able to use the genetic code of organisms to find out more about their evolutionary history. How is this most likely to impact classification
The group of choices associated with the given question are as follows:
Organisms once thought to be unrelated may be found to be related.
Mode of nutrition of some organisms may change.
Organisms that do not have a backbone may develop one.
All multicellular organisms may be found to be prokaryotes
Answer:
The correct answer would be - Organisms once thought to be unrelated may be found to be related
Explanation:
Classification of the organisms is based on the shared characteristics and structural or environmental similarities of the organisms which are modified and evolved during the period of time. It is also known as life sciences evolve and genetic code provides more accurate information.
These evolutionary changes and will lead to certain organisms that are once thought to be unrelated organisms that may actually be related based on a genetic code. These codes have every small and accurate change that occurs and can also find out when these changes occured.
Concerning the structure of molecules, the biggest factor that affects solubility is
Your answer:
A. polarity
B. tarnish
C. mixiness
Answer:
A
Explanation:
Have a nice day
What can the period number of an element tell us about that element?
Answer:
All of the elements in a period have the same number of atomic orbitals.
Explanation:
I need help I tried many times and I don’t get it
Answer: ummm what is this cause I don't get it either
Explanation:
i need help with this to lol
write down the formula for B
example:
Hydrogen + Fluorine = Hydrogen Fluorine
help
Answer:
P³⁻ + Cl⁻ --> PCl₃
Explanation:
PCl₃: phosphorus trichloride. prefix in front of chloride is "tri"–meaning three.
Answer:
phosphorus + chlorine = phosphorus trichloride
(He asked for word equation)
A gas sample occupies 200 mL at 760 mm Hg. What volume does the gas occupy at 400 mm Hg?
Answer:
201.9
Explanation:
when you divided 760 with 400 yo get 19.0 the add it with 200 you get that answer
Need help with this (Chemistry)
Answer:
State is shown inside the parenthesis.
s is for solid
aq is for aqueous solutions
l for liquid
1.Which of the following would decrease the rate of a chemical reaction?
A Increase the temperature
B Reduce the concentration of a reactant
C Increase the concentration of a reactant
D Add a catalyst
Answer:
d.) add a catalyst
Explanation:
ae per I know this is Ur , but I am not sure so u check it
B. Reduce the concentration of a reactant
A chemical reaction is a process that leads to the chemical transformation of one set of chemical substances to another.When the surface area of reactants is more the sites available for the collisions increase. More collisions between the reactants increases the rate of a chemical reaction. Decreasing the surface area of reactants decreases available site for collision. This eventually decreases the rate of a chemical reaction.To decrease the rate of a chemical reaction, B. Reduce the concentration of a reactantFor more information:
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Bombardier beetles release a burst of hot chemical spray with a popping sound. The chemical is sprayed from a structure present under the belly of the beetles.
Which is the likely advantage of such a behavior?
It allows the beetles to attract mates.
It allows the beetles to move obstacles out of their paths.
It allows the beetles to escape from predators.
It allows the beetles to stay warm in cold conditions.
It allows the beetles to escape from predators
How do the ideas of electrolytes and IV fluids relate?
Answer:
Electrolytes, particularly sodium, help the body maintain normal fluid levels in the fluid compartments because the amount of fluid a compartment contains depends on the amount (concentration) of electrolytes in it. If the electrolyte concentration is high, fluid moves into that compartment (a process called osmosis).
Explanation:
Answer:
Electrolytes are minerals in your body that have an electric charge. They are in your blood, urine, tissues, and other body fluids. Electrolytes are important because they help
Balance the amount of water in your body
Balance your body's acid/base (pH) level
Move nutrients into your cells
Move wastes out of your cells
Make sure that your nerves, muscles, the heart, and the brain work the way they should
Sodium, calcium, potassium, chloride, phosphate, and magnesium are all electrolytes. You get them from the foods you eat and the fluids you drink.
The levels of electrolytes in your body can become too low or too high. This can happen when the amount of water in your body changes. The amount of water that you take in should equal the amount you lose. If something upsets this balance, you may have too little water (dehydration) or too much water (overhydration). Some medicines, vomiting, diarrhea, sweating, and liver or kidney problems can all upset your water balance.
Treatment helps you to manage the imbalance. It also involves identifying and treating what caused the imbalance.
hope it's help you plz mark as brain listIf you had 3.6 moles of AI(NO3)3, how many grams would you expect to have?
766.7856 g
Molecular weight of Aluminium Nitrate is 212.996 g/mol. 3.6 moles of Aluminium Nitrate is: 212.996 × 3.6 = 766.7856
three ways how travelers should be considerate towards other travelers when using public transport
The three ways in which travelers should be considerate when using public transport include the following:
Use of headphonesUsing a handkerchief when sneezingNot stepping on people by being aware and vigilantWhat is a Public transport?This is the type of transport which is available to the general public such as trains, buses etc.
It is best to be considerate when using it by applying the following methods mentioned above to prevent disturbance and conflict.
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Methanol, CH3OH, is the simplest of the alcohols. It is synthesized by the reaction of hydrogen and carbon monoxide. Write chemical reactions. If 500 mol of CO and 750 mol of H2 are present, which is the limiting reactant?
Answer:
The limiting reactant is H₂
Explanation:
The reaction of hydrogen (H₂) and carbon monoxide (CO) to produce methanol (CH₃OH) is the following:
2H₂(g) + CO(g) → CH₃OH(g)
From the balanced chemical equation, we can see that 1 mol of CO reacts wIth 2 moles of H₂. So, the stoichiometric ratio is:
2 mol H₂/1 mol CO = 2.0
We have 500 mol of CO and 750 mol of H₂, so we calculate the ratio to establish a comparison:
750 mol H₂/500 mol CO = 1.5
Since 2.0 > 1.5, we have fewer moles of H₂ than are needed to completely react with 500 moles of CO. In fact, we need 1000 moles of H₂ and we have 750 moles. So, the limiting reactant is H₂.
How many atoms are in magnesium acetate!? Please I cant answer its and feel free to add me
Answer:
Hey this is your answer 59.05.
Explanation:
C) $18.06 \times {10^{23}}$ D) $24.08 \times {10^{23}}$ Hint: In order to find the number of atoms in 48 g of Mg, use the formula which relates the number of particles/atoms with the Avogadro number and number of moles of the substance and this required formula is: number of atoms = number of moles × Avogadro's number.
Please can I have brainliest :]
Needing help please help me
Answer:
18. E. 0%
19. D. 25%
Explanation:
Question 18:
Let's use "B" to represent the dominant allele of "light blue skin", and
"b" for recessive "light green skin".
Squidward => BB - light blue skin
Squidward's bride => bb - light green skin
When they cross, they will have the following offsprings:
(BB) × (bb) - Parent
(Bb) (Bb) (Bb) (Bb) - Offspring
All the offspring would be light green skin. The dominant allele of light green skin will express itself over the recessive allele.
Therefore, the chances of Squidward and his bride having light green skin is 0%
Question 19:
Squidward's son => Bb - light blue skin
Squidward's son's bride => Bb - light blue skin
(Bb) × (Bb) - parent
(BB) (Bb) (Bb) (bb) - offspring
They will have the following offspring:
BB and Bb - light blue - 75%
bb - light green - 25%
Chance of having offspring with light green skin is 25%
A scientist is using robots to perform thousands of experiments on different
chemical compounds to see how they affect cancer cells. What is this
process called?
A. An intravenous solution
B. Evaluating test results
C. Screening
D. Engineering process
A scientist is using robots to perform thousands of experiments on different chemical compounds to see how they affect cancer cells.This process is called Screening.
What is screening?The method to test diseases and health condition of body used by scientist and doctor is called screening. The screening helps to find problem earlier and treat them.
What is an intravenous solution?The liquid given to replace water, sugar and salt needed if you are ill or having operation.There are three type of an intravenous solution, isotonic, hypotonic and hypertonic.This an intravenous solution used in an intravenous therapy.What is evaluating test?The process by which of system and component are compared against requirement and specification through testing. The result of the evaluating test is called Evaluating test resultsWhat is Engineering process?The process used by Engineer design and create functional products. This process is a series of steps.To learn more about chemical compounds here.
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Answer: screening
Explanation:
Separation units often use membranes, absorbers, and other devices to reduce the mole fraction of selected constituents in gaseous mixtures. Consider a mixture of hydrocarbons that consists of 62 percent (by volume) methane, 28 percent ethane, and 10 percent propane. After passing through a separator, the mole fraction of the propane is reduced to 1 percent. The mixture pressure before and after the separation is 100 kPa. Determine the change in the partial pressures of all the constituents in the mixture.
Answer:
See explanation
Explanation:
We first obtain the mole fraction of propane at the start and end;
0.01 = x/0.62 + 0.28 + x
0.01[0.62 + 0.28 + x] = x
0.01[0.9 + x] =x
9 * 10^-3 + 0.0.1x = x
9 * 10^-3 = x - 0.0.1x
9 * 10^-3 = 0.99x
x = 9 * 10^-3/0.99
x = 9.09 * 10^-3
After
For methane
0.62/ 0.28 + 0.62 + 9.09 * 10^-3 = 0.68
For ethane
0.28/0.28 + 0.62 + 9.09 * 10^-3 =0.31
Change in partial pressure of methane = (0.68 - 0.62) * 100kPa = 6 kPa
Change in partial pressure of ethane = (0.31 - 0.28) * 100kPa = 3 kPa
Change in partial pressure of propane= (0.01 - 0.1) * 100kPa = -9 kPa
Drag each item to show if it is matter or not matter.
light bulb added to
sunlight
heat
lamp
matter
light bulb
not matter
Q 20.17: In IR spectroscopy, a conjugated ketone will produce a C=O signal at a ___________________ wavenumber, compared with a non-conjugated ketone of similar structure.
Answer:
See explanation
Explanation:
Infrared spectroscopy is concerned with transitions between vibrational energy levels. Each infrared active vibration leads to a change in dipole moment.
A ketone compound contains the -C=O group whose signal normally occurs at about 1710 cm-1.
A conjugated ketone is one in which the -C=O group is attached to the -C=C group. This leads to delocalization and reduces the electron density of the C=O double bond, which weakens this bond hence lowering the stretching frequency of the -C=O bond from 1710 to about 1680cm-1.
calculate the number of moles of al2o3 that are produced when 3.60 mol fe is produced in the following equation. 2Al+3FeO—> 3Fe+Al2O3
Answer:
5. a
Explanation:
Al+3FeO—> 3Fe+ Al2O3
3.60—>3.60÷3=1.20 (mol)