Answer:B
Explanation:got it right
The statement, "It is technically challenging to create nuclear fusion reactions safely and efficiently", is related to nuclear fusion reaction. Thus, Option B is correct.
This is due to the need to reach and maintain the extreme temperatures and pressures required for the reaction to occur and to confine and control the plasma in which the reaction takes place.
Nuclear fusion is a promising source of energy that has the potential to provide abundant, clean & sustainable power. However achieving nuclear fusion requires overcoming several challenges including the technical difficulties of creating and controlling the extreme conditions required for the reaction to occur.
Fusion reactions can produce high-energy neutrons that can damage the materials used to contain the reaction and require special handling and disposal. While progress has been made in developing fusion technologies, there is still much work to be done to make fusion a viable source of energy for the future.
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Jupiter revolves around the sun in a predictable pattern because
Determine the percentage composition of Ptl2
Answer:
Percent Composition
1. Find the molar mass of all the elements in the compound in grams per mole.
2. Find the molecular mass of the entire compound.
3. Divide the component's molar mass by the entire molecular mass.
4. You will now have a number between 0 and 1. Multiply it by 100% to get percent composition.
When hydrogen gas is bubbled into 2-butyne, the product is
Answer:
On treatement of 2 -with hydrogen gas and lindlar catalyst, the major product obtained is cis-2butene.
In this experiment, simple chemical reactions are used to generate small quantities of hydrogen and
oxygen gases. These methods would be too expensive and too complicated if large quantities of these
gases were needed, however. Use your textbook, a chemical encyclopedia, or an online source to look
up the major industrial methods of preparing very large quantities of these gases. Summarize your
findings here.
One of the industrial method for the production of hydrogen is the steam reforming process while oxygen is air separation.
Industrial method of hydrogen preparation
One of the industrial method for the production of hydrogen is the steam reforming process also known catalytic steam–hydrocarbon process.
In catalytic steam–hydrocarbon process, gaseous or vaporized hydrocarbons are treated with steam at high pressure over a nickel catalyst at 650°–950° C to produce carbon oxides and hydrogen.
Industrial method of oxygen preparationOne of the industrial method of oxygen production is the separation of air using either a cryogenic distillation process or a vacuum swing adsorption process.
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An air mattress is filled with 0.55 moles of air. the air inside the mattress has a temperature of 295 k and an absolute pressure of 3.5 kilopascals. what is the volume of the air mattress? the volume of the air mattress is liters.
The volume of the air mattress filled with 0.55 moles of air and has a temperature of 295 k and an absolute pressure of 3.5 kilopascals is 386L.
How to calculate volume?The volume of a gas can be calculated by using the ideal gas law equation as follows:
PV = nRT
Where;
P = pressureV = volumen = number of molesR = gas law constantT = temperature0.0345 × V = 0.55 × 0.0821 × 295
0.0345V = 13.32
V = 386L
Therefore, the volume of the air mattress filled with 0.55 moles of air and has a temperature of 295 k and an absolute pressure of 3.5 kilopascals is 386L.
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Answer:
The answer is 34.2 L.
Explanation:
Ideal Gas Law = PV = nRT
(where P is pressure, V is volume, n is the number of moles, R is the ideal gas constant, and T is the temperature in Kelvin.)
Plug in the known values into the Ideal Gas Law equation:
3.5 kPa * V = 0.55 moles * 8.31 J/mol*K * 295 K
Finally, solve for V:
V = (0.55 moles * 8.31 J/mol*K * 295 K) / 3.5 kPa
= 34.2 L
What is the molar mass of H₂CO₂?
Answer:
I think the Molar mass of H₂CO₂ should be 62..
Explanation:
I'm not too sure tho... Hope this helps!
Which information must be known about a compound to find the molecular formula from the empirical formula?
Answer:
Empirical formulas can be determined from the percent composition of a compound. In order to determine its molecular formula, it is necessary to know the molar mass of the compound. Chemists use an instrument called a mass spectrometer to determine the molar mass of compounds.
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What must happen for carbon dioxide to sublimate at a given pressure ?
Answer:
If the pressure is reduced on the solid carbon dioxide the temperature will drop and the liquid carbon dioxide will solidify into snow-like substance.
Explanation:
A catalyst ______. (select all that apply.) multiple select question. is depleted in a chemical reaction undergoes no permanent change during a reaction does not participate in a chemical reaction
The statements that are true regarding a catalyst are as follows:
It undergoes no permanent change during a reaction
It does not participate in a chemical reaction
What is a catalyst?
A catalyst is a substance that increases the rate of a chemical reaction without being consumed in the process.
A catalyst increases the rate at which a chemical reaction occurs by decreasing the activation energy of the reaction.
Since a catalyst is not used up in the reaction, the following statement applies:
It undergoes no permanent change during a reaction
It does not participate in a chemical reaction
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Assuming a parent isotope with a half-life equal to 4.5 billion years, what percentage
of the original parent remians after 6.75 billion years have passed?
Answer:
35.4 % left
Explanation:
6.75 / 4.5 = 1.5 half lives
1/2 ^(1.5) = .354 or 35 .4 %
Perform the following
mathematical operation, and
report the answer to the
correct number of significant
figures.
3.96 * 0.1159 = [?]
The answer to the problem 3.96 * 0.1159 is : 0.459 (3 significant figures)
Meaning of Significant figures and the rule of engagementSignificant figures can be defined as numbers in a group of numbers that place number in the right value or worth.
Significant figures defined the value of measurement of a particular number.
The rules of engagement in this case is the set of rules or laid down principles that direct how we interact with this significant figures and how they are used.
For this case the significant figures of the product will be the same as the figure with the least significant figure in the multiplication.
In conclusion, The answer to the problem 3.96 * 0.1159 is : 0.459 (3 significant figures)
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Calculate the mass of water producd from the reaction of 126g of pentaboron noahydride with 192g of moleculAR OXYGEN
Answer:
81.08g of H[tex]_{2}[/tex]O will be produced.
Explanation:
Write down the balanced chemical equation:
[tex]B_5H_9 + O_2[/tex] ⇒ [tex]B_2O_3+H_2O[/tex]
[tex]2B_5H_9+12O_2[/tex] ⇒ [tex]5B_2O_3+9H_2O[/tex]
Determine the limiting reagent:
[tex]B_5H_9[/tex] :- 126/63.12646 = 1.995993 mol
1.995993/2 = 0.9979965
[tex]O_2[/tex] :- 192/31.9988 = 6.000225 mol
6.000225/12 = 0.50001875
Therefore, [tex]O_2[/tex], is the limiting reagent.
Use stoichiometry ratios to determine the number of moles of water produced:
[tex]O_2[/tex] : [tex]H_2O[/tex]
12 : 9
6.000225 : 4,500168756328362
Use the mole formula to calculate the mass of water produced:
[tex]n=\frac{m}{M} \\m=nM\\m=(4.500168756328362)(18.01528)\\m=81.08g[/tex]
After learning about climate change in her science class, selena wants to make a few changes at home so she can affect climate change in a small way. which changes will give her the best results?
Selena can change from burning fossil fuel in her home to using solar energy.
What causes climate changes?Climate change is caused by the release of the greenhouse gases which is gotten through the use and burning of fossil fuels such as coal.
The use of solar panels and solar energy by Selena in her house can help adjust the climate changes by decreasing the amount of greenhouse gases released into the atmosphere.
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Which is the electron configuration for zinc?
O 1s²2s²2p 3s²3p64s²3d³
O 1s22s22p 3s23p64s¹3d¹0
O 1s22s22p53s23p64s²3d¹0
O 1s²2s²2p 3s23p64s²3d¹0
The electronic configuration of zinc is expressed as [tex]1s^2 2s^2 2p^6 3s^2 3p^6 3d^{10} 4s^2[/tex]. Hence, option D is correct.
What is an electron configuration?Electronic configuration, also called electronic structure, is the arrangement of electrons in energy levels around an atomic nucleus.
The atomic number of zinc is 30 therefore The electronic configuration of zinc is expressed as [tex]1s^2 2s^2 2p^6 3s^2 3p^6 3d^{10} 4s^2[/tex].
In simpler form expressed as [Ar] [tex]3d^10 4s^2[/tex]. The electronic configuration shows the distribution of the electrons of an atom or a molecule.
Hence, option D is correct.
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Determine the mass of water produced from 50g hydrochloric acid and
excess potassium hydroxide. HCI + KOH --> H₂O + KCI
Answer:
24.7 grams H₂O
Explanation:
To find the mass of water, you should (1) convert from grams HCl to moles (via molar mass from periodic table), then (2) convert from moles HCl to moles H₂O (via mole-to-mole ratio from equation), and then (3) convert from moles H₂O to grams (via molar mass from periodic table).
1 HCl + KOH --> 1 H₂O + KCl
Molar Mass (HCl): 1.008 g/mol + 35.45 g/mol
Molar Mass (HCl): 36.458 g/mol
Molar Mass (H₂O): 2(1.008 g/mol) + 16.00 g/mol
Molar Mass (H₂O): 18.016 g/mol
50 g HCl 1 mole HCl 1 mole H₂O 18.016 g
-------------- x ------------------ x ------------------- x ------------------- = 24.7 g H₂O
36.458 g 1 mole HCl 1 mole H₂O
why does the sloth have both a scientific name and common name
Boxes on trees in swamps give wood ducks a place to build their nests platforms built on top of telephone poles provide a place for eagles to make their nests
in backyards and parks, people may set up houses for bats, birds, or toads how do these artificial homes affect resources in the animal's environments? how
does this in turn affect population size?
These artificial homes preserve the resources in the animal's environment and increases population size.
What is Population size?This is defined as the number of organisms in a population at a given place and time.
Since the resources used are artificial, they are preserved with an increase in the population due to reproduction.
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In a simple distillation setup, what is the sequence of equipment from the bench top to the round bottom flask
In a simple distillation setup, the sequence of equipment from the bench top to the round bottom flask is:
ThermometerDistillation flaskLiebig condenserRound bottom flaskBunsen burnerWhat is Distillation?This is the process in which a mixture is separated through selective boiling and condensation.
The distillation flask and liebig condenser are usually located above the round bottom flask in the set up.
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What is the concentration of hydronium and hydroxide ions in pure water at 25°c.
Explanation:
The concentration of hydronium and hydroxide ions are equal in pure water at 25 degree Celsius. Bringing the pH of pure water to be 7.is calcium hydroxide a strong alkali? if no, why? if yes, why? i really don’t understand
Answer:
Yes
Explanation:
Neither Calcium nor hydrogen nor oxygen are alkali metals
Alkali metals are Group 1 elementsThey are very soft and mellable.H,Li,Na,K,Cs,Fr are included in it however H is not a actual memberHere
Ca(OH)_2 is the compound
Vant Hoff factor is 3
As it's greater than 1 it's a very strong base .
The pOH of this comes around 1.5 to 1.3
So very heavy ionic dissociation
Strong Alkali
Calcium hydroxide [tex] \sf \: Ca(OH)_2[/tex] is a really strong alkali or base since it has the power to accept proton when added to a solution.. Its pH is 9 and we know that when the pH is more than 7 it is a base..
One more reason why calcium hydroxide is a strong alkali is that it dissociates completely when added to any solution...
calculate the number of moles of nitrogen monoxide gas used to form 72.0 grams of water vapor.
4 moles of nitrogen monoxide gas used to form 72.0 grams of water vapor.
What is a mole ?A mole is the measurement unit which is used to correlate the molar mass with number of molecules present.
The equation for reaction of Nitrogen monoxide to form water vapor is given by
4NH₃ + 6NO ----> 5N₂ + 6H₂O
72 grams of water vapor means = 72/18 = 4 mole of water vapour
The mole fraction of NO to H₂O is 6 : 6
Therefore for 4 moles of water vapor formation , 4 moles of nitrogen monoxide will be required.
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when 2 moles of C6H6 react with excess Oxygen gas, how many moles of water are produced?
C6H6 + 9 O2 ------> 6CO2 + 6 H20
Answer:
12 moles H₂O
Explanation:
To find the amount of water produced, you need to use the given amount and multiply it by the mole-to-mole ratio from the equation. These numbers are the coefficients of the molecules you are converting from and to. When writing the ratio, make sure to arrange it in a way that allows for the cancellation of units.
1 C₆H₆ + 9 O₂ ----> 6 CO₂ + 6 H₂O
2 moles C₆H₆ 6 moles H₂O
--------------------- x ------------------------- = 12 moles H₂O
1 mole C₆H₆
A new band sensation is playing a concert and recording it for a live album to be released this summer. select all the statements that are true for band producing sound.
a) the frequency or amplitude of the sound waves will not change
b) the frequency or amplitude of the sound waves will change if the singer varies their voice
c)producing sound changes the wane from an electromagnetic wave to a mechanical wave
d)the produced sound waves are mechanical waves
e)the produced sound waves are electromagnetic waves
f) producing the sound does not change the wave type
g) producing sound changes the wave from mechanical wave to an electromagnetic wave
They travel in compressions and rarefactions and are propagated through air.
What are sound waves?Sound waves are longitudinal waves. They travel in compressions and rarefactions and are propagated through air.
The following are true about sound waves:
the frequency or amplitude of the sound waves will change if the singer varies their voice.the produced sound waves are mechanical waves. producing the sound does not change the wave typeLearn more about sound waves:https://brainly.com/question/11797560
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compare molecular & covalent network crystal solid?
Answer:
Molecular solids and covalent network solids are two types of solid compounds. The key difference between molecular solid and covalent network solid is that molecular solid forms due to the action of Van der Waal forces where as covalent network solid forms due to the action of covalent chemical bonds.
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please help!
What happens when a hot metal rod with a temperature of 100 degrees is placed in 10 degree cold water ?
1) the temperatures of the rod & water will both decrease
2) heat will travel out of the metal rod & into the water
3) the temperatures of the rod & water will both decrease
4) the temperatures of the rod & water will both increase
Answer:
What happens when a piece of hot metal is dropped in room temperature water. Over time the metal will cool and the water will heat up. Eventually the two objects will have the same temperature. They are then said to be in thermal equilibrium with one another.
Explanation:
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Which description best describes n in the ideal gas law equation? *
How hard the particles are pushing on something
How many particles of something there is
How hot/cold something is
How much space something takes up
8.3145 L kPa / K mol
Answer:
How Hot Or cold it is is how it may be perceived
When carbon bonds in organic compounds, which of the following is/are true: (1) Carbon makes 4 bonds. (2) Carbon can form single, double or triple bonds. (3) Carbon atoms can form branched chains. (4) Carbon forms covalent bonds. (5) All of the above are true.
All of the above are true as regards carbon bonds in organic compounds and is denoted as option 5.
What is Organic compound?These are chemical compounds which contain carbon-hydrogen or carbon-carbon bonds. Carbon has four valence electrons which makes it tetravalent and able to form multiple bonds.
They can form multiple bonds and branched chains in hydrocarbons such as alkanes, alkenes and alkynes during reactions.
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The solubility of sodium hydrogen carbonate in water 20 degrees is 9.6 g/100 g h2o.
what is the mole fraction of nahco3 in a saturated solution?
what is the molality of the solution?
We can see from the details below that, the value of the solution's molality is 1.14 mol/Kg.
What is solubility?The term solubility has to do with the quantity of solute that is able to dissolve in a given quantity of solvent. We have the solubility of the sodium hydrogen carbonate in water at 20 degrees as 9.6 g/100 g h2o.
Number of moles of sodium hydrogen carbonate = 9.6 g/84 g/mol = 0.114 moles
Number of moles water = 100 g /18 g/mol = 5.55 moles
Mole fraction of sodium hydrogen carbonate is obtainable by the use of the relation;
0.114 moles/0.114 moles + 5.55 moles
= 0.02
Molality of the solution = 0.114 moles/0.1 Kg = 1.14 mol/Kg
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How do scientists answer questions?
OA. By making observations and performing experiments
OB. By listening to the ideas of others and choosing the best one
OC. By writing papers that support their opinions
OD. By reading reliable sources on the subject they are interested in
In[7.60x10-³] = In(5.63×10-2) - (k s¯¹)(480 s)
Answer:
I'm not understand that question
I'm so sorry