Mark all correct answers. Which of the following statements correctly describes plasmas
Answers
ANSWER Plasamas are good conductors of electricity and are affected bt magnetic fields
Related Questions
Tornadoes form so readily in Dixie Alley and Tornado Alley because different ___________________________ meet or collide here. In Tornado Alley, the ________, _________ air from Canada and the Rocky Mountains collides with ________, _________ air from the __________________________________. In Dixie Alley, the __________, _________ air from _______________________________ collides with the __________, _________ air from the _________________________________.
Answers
atmospheric conditions; warm, moist; hot, humid; Gulf of Mexico; cool, dry; Gulf Coast; warm, moist; Gulf of Mexico
Tornadoes are powerful, destructive columns of air that rotate rapidly and move across the ground. When warm, humid air and cold, dry air collide, they are created.Dixie Alley and Tornado Alley are where many atmospheric variables meet or clash, which explains why tornadoes originate here so easily. In Tornado Alley, hot, humid air from the Gulf of Mexico collides with warm, wet air from Canada and the Rocky Mountains. The Gulf Coast's cool, dry air and the Gulf of Mexico's warm, humid air meet in Dixie Alley.
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How many atoms are in 18.99g of fluorine?
Answers
18.99g/mol F = 1 mole of F
1 mole is equal to Avogadro's number which is:
\(6.02214076 × {10}^{23} \)
Therefore, one mole of fluorine has 6.02214076 × 10^23 fluorine atoms.
Answer:
Explanation:
The Molar mass of fluorine= 18.99
Moles=mass/molar mass=18.99/18.99=1
Numbers of atoms=1x6.02x10^23=6.02x10^23
I hope it helps
what do you think happens to the rate of a gas phase reaction if concentrations of reactants are increased? (temperature is constant)
Answers
Increasing the concentration of one or more reactants frequently causes the gas-phase reaction to accelerate.
What are the factors affecting the gas phase reaction?The rate of gas-phase chemical reactions tends to increase rapidly as temperature rises. This is primarily due to the fact that the fraction of molecules with energy greater than the activation energy increases with temperature.Increasing the concentration of one or more reactants frequently causes the reaction to accelerate. This is due to the fact that a higher concentration of a reactant causes more collisions with that reactant in a given time period. The physical state and surface area of the reactants.The rate of the reaction is determined by the reactant concentrations, the reaction temperature, the phase and surface area of the reactants, the solvent, and the presence or absence of a catalyst.To learn more about gas-phase reaction refer to :
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The solutions in the two arms of this U-tube are separated by a membrane that is permeable to water and glucose but not to sucrose. Side A is half-filled with a solution of 2 M sucrose and 1 M glucose. Side B is half-filled with 1 M sucrose and 2 M glucose. Initially, the liquid levels on both sides are equal. A U-shaped tube with two arms A and B that are separated by a membrane on the base of U. Arm A is filled with a solution containing 2 molar solution of sucrose and 1 molar solution of glucose. Arm B is filled with a solution containing 1 molar solution of sucrose and 2 molar solution of glucose. The liquid levels are equal in both arms. When the system illustrated above reaches equilibrium, the sugar concentrations on both sides of the U-tube will be ________. 2 M sucrose, 1 M glucose 1.5 M sucrose, 1.5 M glucose 1 M sucrose, 1 M glucose 1 M sucrose, 2 M glucose
Answers
The diagrammatic expression for the solutions in the two arms of the U-tube separated by a membrane that is permeable to water and glucose but not to sucrose is shown in the image attached below.
When the system illustrated above reaches equilibrium, the sugar concentrations on both sides of the U-tube will be 1.5 M sucrose, 1.5 M glucose
From the image attached, if the system approaches equilibrium;
The movement of the solute(i.e. one molecule of sucrose) have the potential to proceed and move to the other arm of the U-shaped tube but with that, the total overall concentration cannot change in the whole U-tube structure due to the fact that the volume of the solvent(water) is constant.
Similarly, both arms of the U-tube shape have the same concentration as well as the same net Kinetic energy of solutes giving them the isotonic condition property.
Now, at equilibrium, the concentration of the sugar on both sides is:
= \((\dfrac{1M +2M}{2})\)
\(\mathsf{=\dfrac{3M}{2}}\)
= 1.5 M sucrose, 1.5 M glucose
Therefore, we can conclude that the concentration of the sugar on both sides at equilibrium is 1.5 M sucrose, 1.5 M glucose.
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conversion factors are useful in solving problems in which a given measurement must be expressed in
Answers
Answer:
In humans, a cleft chin is dominant and no-cleft is recessive. What will the generations look like? Assume that Mendel’s method of crossing two true breeding parents with opposite traits is followed. Check all that apply.
The P generation, F1 generation, and F2 generation will have all cleft chins.
The P generation, F1 generation, and F2 generation will have all no-cleft chins.
The P generation and F1 generation will have all cleft chins.
The F1 generation will have all cleft chins.
The P generation and F2 generation will have all no-cleft chins.
The P generation and F2 generation will have cleft chins and no-cleft chins.
The P generation, F1 generation, and F2 generation will have cleft chins and no-cleft chins.
Explanation:
Question
In the diagram, which letter represent the transition from solid to liquid?
Responses
A. A
B. B
C. C
D. D
Answers
The letter represent the transition from solid to liquid E. E.
What is the transition ?Transition is a process of change from one state or condition to another. It is a fundamental element of life, as it allows us to move forward, adapt, and develop. Transition can be physical, emotional, spiritual, or even intellectual. It can involve a change in environment, relationships, beliefs, roles, or responsibilities. Transition can be gradual, or it can happen suddenly. It can be difficult and require a lot of effort, or it can be relatively easy. Transition can be a positive experience, or it can be a difficult experience. Regardless of the form it takes, transition is a necessary part of life and growth.
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It takes more force to move an object with less mass.
True or false
Answers
Answer:
False
Explanation:
Answer:
False
Explanation:
How would Earths revolution be affected if it had a larger orbit??
Answers
Answer:
When the Earth rotates on its axis, it prevents air currents from going in a straight line to the north and the south from the equator. It results in one of the effects of rotation of the Earth: the Coriolis Effect.
If you find the mass of a sample to be 42.1 g and the actual mass is 42.0 g. your percent error would be what?
Answers
Answer:
0.24%
Explanation:
To find the percent error, first subtract the actual value by the expected value. You can ignore the sign of the difference.
42.0 - 42.1 = -0.1 = 0.1
Divide the difference by the expected value and multiply by 100%.
0.1/42.1 = 0.0024 × 100% = 0.24%
The percent error is 0.24%.
which element does not have the same number of electrons
Answers
The element that does not have the same number of electrons in its outermost shell as the other elements in its group is helium. option C is correct.
Helium is a gas and the second element of the periodic table. It has an atomic number of 2. It is a colorless, odorless, and non-toxic gas. Furthermore, it is the lightest gas, and it is used in filling in the tires of airplanes and balloons.
The group in which helium is present in group 18. It contains 6 elements. Helium is the first element. All element in the periodic table has eight electrons in their last shell. But only helium has 2 electrons in its outer valence. So, helium is different from other elements present in its group.
Thus, the correct option is C i.e Helium (He).
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The complete question is
Which element does not have the same number of electrons in its outermost shell as the other elements in its group?
hydrogen (H)
boron (B)
helium (He)
bromine (Br)
formation of a solid, formation of a gas, and a color change can also occur during some physical changes. give examples of physical changes that could produce these clues. what evidence suggests that the changes you observed in test tubes 1-3 were, in fact, chemical changes
Answers
Answer:
Examples of these physical changes are melting ice-cream, or boiling water as well as freezing it. Adding dye to water is also a physical change since the chemical compounds remain the same, it is only the physical appearance that changes.
Possible reasons for chemical changes are the formation of a precipitate (solid), or formation of gas (bubbling) as well as release of heat or light or release of odor.
the pressure of 5.0 l of gas increases from 1.50 atm to 3.1 atm. what is the final volume of the gas, assuming constant temperature?
Answers
The volume of the gas at constant temperature would be 4.60 L.
How this is done?
P1 = 1.5 atm
V1 = 5 lit
P2 = 1240 mm Hg = 1.63 atm
V2 = ?
P1V1 = P2V2
1.5 X 5 = 1.63 X V2
V2 = 7.5
The volume of a fixed mass of a gas decreases on cooling it and increases by increasing the temperature.
V1 / T1 = V2 / T2 (Sometimes known as Charles's Law)
V1 = is the starting volume
T1 = is the starting temperature
V2 = is the finishing volume
T2 is the finishing temperature
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An ion has 26 protons, 28 neutrons, and 24 electrons. Which element is this ion? a. Xe b. Ni c. Fe d. Mg e. Cr
Answers
The ion that has 26 protons, 28 neutrons, and 24 electrons is Iron (Fe) (option c).
An element can be determined by the number of protons in the nucleus of its atom. The number of protons present in an atom is referred to as the atomic number of the element.
This means that the number of protons in an atom is unique to a specific element.
Iron (Fe) has 26 protons in the nucleus of its atom.
Therefore, an ion with 26 protons is an ion of the element iron (Fe).
Magnesium (Mg) has 12 protons, Chromium (Cr) has 24 protons, Xenon (Xe) has 54 protons and Nickel (Ni) has 28 protons.
Thus, an ion which has 26 protons, 28 neutrons, and 24 electrons is Fe (option c)
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WHOEVER ANSWERS A GOOD ANSWER I WILL GIVE BRAINLIEST!
What would happen to the rate of evaporation if you moved all the containers outdoors into direct sunlight?
Answers
Answer:
Molecules contained in a liquid evaporate from the surface area. This means that the larger the surface area, the faster the rate of evaporation. ... This means all the other factors that affect the rate of evaporation are identical. Leave the containers for one hour.
Explanation:
Answer:
Evaporation would accelerate.
Explanation:
Direct sunlight increases the thermal energy on the containers, increasing evaporation.
11. In the boxes below make Bohr models for each of the elements.
a. Determine how many electrons, protons, and neutrons there are in each atom.
b. Draw a Bohr model of each element using the number of electrons, protons, and neutrons
Electrons.
Protons
Neutrons
HELIUM
Electrons
Protons
Neutrons
OXYGEN
Answers
The atomic number represents the number of protons, whereas the mass number represents the quantity of protons and neutrons. The number of protons equals the amount of electrons.
In a Bohr diagram, where do you determine the number of neutrons?The atomic number is the number of protons. The number of neutrons may be calculated by subtracting the number of protons from the atomic mass, which is then rounded to the closest whole number.
For neutrally charged species, the number of electrons in an atom equals the atomic number of an element. This signifies that the number of electrons and protons in an element are equal. As a result, the number of electrons in oxygen is eight.
The number of valence electrons in neutral atoms equals the atom's main group number. A periodic table column can be used to determine an element's main group number. Carbon, for example, belongs to group 4 and contains four valence electrons.
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In an experiment, calcium carbonate reacted with different volumes of hydrochloric acid in water. One of the products formed during the experiment was carbon dioxide. The time taken for 0.89 mL of carbon dioxide to form was recorded. A partial record of the experiment is shown.
Based on factors that affect the rates of chemical reactions, which of the following would describe the trend expected in the table?
A. Time increases as the volume of hydrochloric acid decreases
B. Time increases as the volume of hydrochloric acid remains the same
C. Time decreases as the mass of calcium carbonate decreases
D. Time decreases as the mass of calcium carbonate remains the same
Answers
Based on the factors that affect the rates of chemical reactions, the trend expected in the table would be:
A. Time decreases as the volume of hydrochloric acid increases.
The rate of a chemical reaction depends on the concentration of the reactants. In this case, the hydrochloric acid is a reactant, and increasing its volume will increase its concentration, leading to a faster reaction rate and shorter time for the formation of carbon dioxide.
Therefore, option A is the correct answer. The mass of calcium carbonate may affect the reaction rate if it affects the surface area or particle size of the reactant, but the information provided in the question is not sufficient to determine such an effect. The volume of hydrochloric acid is a more significant factor in this case.
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which ketone in each pair is more reactive? 2-hexanone or 3-hexanone
Answers
2-hexanone is more reactive than 3-hexanone.
The reactivity of a ketone can be influenced by the position of the carbonyl group relative to the alkyl substituents. In the case of 2-hexanone and 3-hexanone, the position of the carbonyl group differs.
2-hexanone has the carbonyl group located on the second carbon of the hexane chain, whereas 3-hexanone has the carbonyl group on the third carbon. The reactivity of ketones typically increases as the carbonyl group is closer to the end of the alkyl chain.
In this case, 2-hexanone has a more reactive carbonyl group than 3-hexanone because it is closer to the end of the carbon chain. The proximity to the end of the chain allows for greater accessibility and interaction with nucleophiles during reactions.
The increased reactivity of 2-hexanone can be attributed to the greater electronic and steric effects experienced by the carbonyl group, which make it more susceptible to nucleophilic attack or other chemical transformations compared to 3-hexanone.
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A 10.0−mL solution of 0.660 M NH3 is titrated with a 0.220 M HCl solution. Calculate the pH after the following additions of the HCl solution: (a) 0.00 mL (b) 10.0 mL (c) 30.0 mL (d) 40.0 mL
Answers
A 10.0−mL solution of 0.660 M NH₃ is titrated with a 0.220 M HCl solution. The PH after the following additions of the HCl solution: a) pH = 11.24, b) pH = 8.44, c) pH = 6.37, d) pH = 5.20.
What is PH?PH stands for potential hydrogen. It is a measure of the acidity or alkalinity of a solution and is measured on a scale of 0-14. A solution with a pH of 0 is highly acidic, a solution with a pH of 7 is neutral, and a solution with a pH of 14 is highly alkaline.
a) pH = 11.24
The pH of the NH₃ solution before any HCl has been added is 11.24, since the initial concentration of NH₃ is much higher than the HCl.
b) pH = 8.44
After 10.0 mL of the HCl solution has been added, the solution is at the equivalence point, where the amount of HCl added is equal to the amount of NH₃ in the solution. The pH of the solution is 8.44, which is the pH of a 1:1 mixture of NH₃ and HCl.
c) pH = 6.37
After 30.0 mL of the HCl solution has been added, the amount of HCl is now three times the amount of NH₃. The pH of the solution is 6.37, which is the pH of a 1:3 mixture of NH₃ and HCl.
d) pH = 5.20
After 40.0 mL of the HCl solution has been added, the amount of HCl is now four times the amount of NH₃. The pH of the solution is 5.20, which is the pH of a 1:4 mixture of NH₃ and HCl.
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Which is a way for solutes to move from an area of high solute concentration to an area of low solute concentration
Answers
Diffusion is a way for solutes to move from an area of high solute concentration to an area of low solute concentration.
What is Diffusion ?Diffusion is a physical process in which the movement of gases from a high concentration area t o a area of low concentration through a semi permeable membrane. It can occur in any medium like solid, liquid and gas.
Thus, from the above conclusion we can say that Diffusion is a way for solutes to move from an area of high solute concentration to an area of low solute concentration.
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What mass of Na2SO4, is dissolved in a 75L tank that has a concentration of 0.150 M?
Answers
According to the molar concentration, 1597.5 grams of sodium sulfate is dissolved in a 75 L tank that has a concentration of 0.150 M.
Molar concentration is defined as a measure by which concentration of chemical substances present in a solution are determined. It is defined in particular reference to solute concentration in a solution . Most commonly used unit for molar concentration is moles/liter.
The molar concentration depends on change in volume of the solution which is mainly due to thermal expansion. Molar concentration is calculated by the formula, molar concentration=mass/ molar mass ×1/volume of solution in liters.
The given values are:
Molar mass= 142 g
Molarity=0.150 M
Volume= 75 L
Substitution in above formula gives,
\(\rm{mass}=\dfrac{0.150\times142\times75}{1}\\=1597.5 \ g\)
Thus, 1597.5 grams of sodium sulfate is dissolved in a 75 L tank that has a concentration of 0.150 M.
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The mass of Na2SO4 dissolved in a 75L tank with a 0.150M concentration is approximately 1.60 kg.
Explanation:The question is asking for the mass of sodium sulfate (Na2SO4) dissolved in a 75L tank with a concentration of 0.150M. In chemistry, molarity (M) is defined as the number of moles of solute per liter of solution. Thus, we can calculate the number of moles of Na2SO4 in the tank by multiplying the volume of the tank by the molarity: 75L * 0.150 mol/L = 11.25 mol. Since the molar mass of Na2SO4 is approximately 142.04 g/mol, the mass of Na2SO4 in the tank is 11.25 mol * 142.04 g/mol = 1597.95g, or approximately 1.60 kg.
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T/F The reason that atomic numbers are always integer values is because every element has:a particular number of protons
Answers
This statement is True. The atomic number of an element represents the number of protons in its nucleus, which is an integer value. Therefore, the reason that atomic numbers are always integer values is that every element has a particular number of protons.
The reason atomic numbers are always integer values is that every element has a particular number of protons, and the atomic number represents the number of protons in the nucleus of an atom of that element.
Since protons are discrete particles, the atomic number must be an integer value.
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a. on the basis of your intuitive understanding of the chemical properties of sodium and gold, where in your activity series would you place sodium and gold? b. will hydrochloric acid react with gold metal to produce gold(iii) ions and hydrogen gas? explain.
Answers
Based on my understanding of the chemical properties of sodium and gold, I would place sodium higher than gold in the activity series.
What is sodium?Sodium is a highly reactive metal that readily loses its outermost electron to form a positively charged ion, whereas gold is a relatively inert metal that does not easily undergo chemical reactions.
As for the second part of the question, hydrochloric acid (HCl) will not react with gold metal to produce gold(III) ions and hydrogen gas. Gold is a noble metal, which means it is resistant to oxidation and does not readily react with acids like HCl. However, aqua regia, a mixture of nitric acid and hydrochloric acid, can dissolve gold by forming complex ions, such as AuCl4-, which are more soluble in water than pure gold metal.
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Weight is the measure of gravity on an object measured by a weight in Newtons. Weight changes if gravitational force changes.
Mass is the amount of kilogram in an object measured by a __________ in grams and does not change…it stays the _________.
Answers
Mass is an intrinsic property of matter and is measured in kilograms. The mass of a bird is a constant. A 15-gram bird is 15 grams, whether measured on the Earth, the Moon, or Mars. Weight is a measure ofthe force of gravity on a physical object and is measured in newtons.
Explain the structure of an atom.
Answers
\(\huge\purple{Hi!}\)
An atom is a complex arrangement of negatively charged electrons arranged in defined shells about a positively charged nucleus. This nucleus contains most of the atom's mass and is composed of protons and neutrons (except for common hydrogen which has only one proton). All atoms are roughly the same size. A convenient unit of length for measuring atomic sizes is the angstrom (Å), which is defined as 1 x 10-10 meters. The diameter of an atom is approximately 2-3 Å.
In 1897, J. J. Thomson discovered the existence of the electron, marking the beginning of modern atomic physics. The negatively charged electrons follow a random pattern within defined energy shells around the nucleus. Most properties of atoms are based on the number and arrangement of their electrons. The mass of an electron is 9.1 x 10-31 kilograms.
One of the two types of particles found in the nucleus is the proton. The existence of a positively charged particle, a proton, in the nucleus was proved by Sir Ernest Rutherford in 1919. The proton's charge is equal but opposite to the negative charge of the electron. The number of protons in the nucleus of an atom determines what kind of chemical element it is. A proton has a mass of 1.67 x 10-27 kilograms.
The neutron is the other type of particle found in the nucleus. It was discovered by a British physicist, Sir James Chadwick. The neutron carries no electrical charge and has the same mass as the proton. With a lack of electrical charge, the neutron is not repelled by the cloud of electrons or by the nucleus, making it a useful tool for probing the structure of the atom.
Even the individual protons and neutrons have internal structure, called quarks. Six types of quarks exist. These subatomic particles cannot be freed and studied in isolation. Current research continues into the structure of the atom.
What is the molarity of a solution that has 90 mol of solute dissolved in 6 liters of solvent? ___ M
Answers
Answer:
15M
Explanation:
To find molarity, you use the equation :
Molarity = \(\frac{moles of solute}{liters of a solution}\)
So to find the molarity, you would do 90mols of the solute divided by 6 liters of the solvent which is 15M.
Why was Byzantium made the new Roman capital? Choose three correct answers.
Answers
Answer + Explanation:
Byzantium had a natural harbor.
Byzantium is located in one of the best natural harbors in the world, in a small peninsula in front of the strait of Bosphorus, which links the Black Sea with the Mediterranean Sea (via the Sea of Marmara and the Aegean Sea).
Rome had been destroyed by invaders.
Rome was sacked in 410 by an army of Visigoths lead by king Alaric. The sacking proved fatal for Rome, and the city would not regain its condition for over a thousand years after.
Byzantium provided greater access to trade routes.
Besides being a great port, Byzantium is also a link between Europe and the Middle East (and Asia), and the Mediterranean and the Black Seas. This means that Byzantium was at a crossroads, and had access to several trade routes.
(from " sebastiansierraocm")
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What type of reaction would NI3+ ->lead to?
Answers
Answer:
Reduction potential (Eo) is defined as a tendency of a chemical species to be reduced by gaining an electron and is defined with electrochemical reference of hydrogen, which is globally given the reduction potential of zero [24].
Explanation:
how much water in the graduated cylinder picture below
Answers
Answer: i believe it is a quarter six
What is the comversion factor used when converting mass to moles?
A. 6.02 x10 particles = 1 mole
B. 22.4L = 1 mole
C. the answer is not listed
D. molar mass = 1 mole
Answers
Answer:
6.02 x 10^23 particles = 1 mole
Explanation:
If A. has 10 to the power of 23 then that is the answer, but if it does not, then the answer is C.
Sulfur dioxide reacts with oxygen to produce sulfur trioxide. Write the equation. Identify the limiting reagent when 20.0 g of SO2 react with 15.6 g of O2.
Answers
The equation related to reaction between Sulfur dioxide and oxygen to produce sulfur trioxide is 2SO\(_2\)(g) + O\(_2\)(g) \(\rightarrow\) 2SO\(_3\) (g). SO\(_2\) is limiting reagent.
What is limiting reagent?The reactant that controls how much of the products are generated inside a chemical reaction is known as the limiting reagent. Since some of the other reactants remain that after limiting reagent has been used fully, it is occasionally discovered that they are in excess in the reactions. The theoretical yield is the most product that can theoretically be produced.
2SO\(_2\)(g) + O\(_2\)(g) \(\rightarrow\) 2SO\(_3\) (g)
moles of SO\(_2\) =20.0 g / 64.07
=0.312moles
moles of O\(_2\)= 15.6 g/32
=0.487moles
On dividing the moles by stoichiometry, out of O\(_2\) and SO\(_2\), SO\(_2\) is limiting reagent.
Therefore, the equation related to reaction between Sulfur dioxide and oxygen to produce sulfur trioxide is 2SO\(_2\)(g) + O\(_2\)(g) \(\rightarrow\) 2SO\(_3\) (g). SO\(_2\) is limiting reagent.
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