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According to Ampere, which of the following sets of current-carrying wires would repel each other? The arrow point indicates the direction of the current in each wire.
Answers
Answer: Option (c) is the correct answer.
Explanation:
When current passes through a wire then a magnetic field is formed. Therefore, when two wires carry current in the same direction then both the wires with have respective magnetic fields in the same direction and their total magnetic field will be large.
But when current between two wires flow in opposite direction then the magnetic field produced will also be in opposite direction. Therefore, both the magnetic fields cancel each other out. Thus, total magnetic field will be small.
As a result, wires which carry current in the opposite direction repel each other.
Related Questions
The number of moles of mgo produced when 0.20 mole of o2 reacts completely is ________. 2mg + o2 → 2mgo
Answers
2Mg + O2 → 2MgO
from this equation we can see that:
1 mole of O2 gives → 2 moles of MgO
So 0.2 moles of O2 will give → ????
So the number of moles of MgO = (0.2 mol O2 )* (2 mol MgO) / (1 mol of O2)
= 0.4
The reaction of 0.20 moles of oxygen on complete utilization produces 0.40 moles of MgO.
From the reaction,
1 mole of oxygen produced 2 moles of MgO.
So, 0.20 moles of oxygen produces:
Moles of MgO produced = 0.20 [tex]\times[/tex] 2
Moles of MgO produced = 0.40 moles.
The reaction of 0.20 moles of oxygen on complete utilization produces 0.40 moles of MgO.
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If a reaction has an equilibrium constant slightly greater than 1, what type of reaction is it?
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How many moles of sodium acetate (nach3coo) must be added to 1.000 liter of a 0.500 m solution of acetic acid (ch3cooh) to produce a ph of 5.675? the ionization constant of acetic acid is 1.8 × 10−5 ?
Answers
ck(CH₃COOH) = 0,5 M.
V = 1 L.
Ka = 1,8·10⁻⁵.
pKa = -logKa = 4,75.
pH = 5,675.
Henderson–Hasselbalch equation: pH = pKa +
log(cs/ck).
5,675 = 4,75 + log(cs/ck).
log(cs/ck) = 5,675 - 4,75 = 0,925.
cs/ck = 10∧(0,925) = 8,4.
cs = 8,4 · 0,5 M = 4,2 M.
n(CH₃COONa) = 4,2 mol/L · 1 L = 4,2 mol.
Calculate ΔH∘ in kilojoules for the reaction of ammonia (ΔH∘f=−46.1 kJ/mol) with O2 to yield nitric oxide NO (ΔH∘f=91.3 kJ/mol) and H2O(g) (ΔH∘f=−241.8 kJ/mol), a step in the Ostwald process for the commercial production of nitric acid.,
Answers
Final answer:
The standard enthalpy change (ΔH°) for the reaction of ammonia with O2 to yield nitric oxide and H2O(g) is calculated using standard enthalpies of formation and is found to be -633.2 kJ.
Explanation:
To calculate the standard enthalpy change (ΔH°) for the reaction of ammonia (NH3) with O2 to yield nitric oxide (NO) and H2O(g), we can use the standard enthalpies of formation (ΔH°f) for the reactants and products. Unfortunately, the provided information contains several elements that are not relevant to this question. Let us use the correct ΔH°f values to find the ΔH° for this reaction. Assuming we have balanced the equation and it is:
4NH3(g) + 5O2(g) → 4NO(g) + 6H2O(g)
The formula to calculate ΔH° is:
ΔH° = [∑ (ΔH°f products) × (moles of product)] - [∑ (ΔH°f reactants) × (moles of reactant)]
Using the values given for ΔH°f:
ΔH°f NH3 = -46.1 kJ/mol
ΔH°f NO = 91.3 kJ/mol
ΔH°f H2O(g) = -241.8 kJ/mol
For the reaction:
ΔH° = [4×91.3 kJ/mol + 6×(-241.8 kJ/mol)] - [4×(-46.1 kJ/mol) + 5×0 kJ/mol]
ΔH° = (365.2 kJ - (-1448.8 kJ)) - (-184.4 kJ + 0 kJ)
ΔH° = -817.6 kJ + 184.4 kJ
ΔH° = -633.2 kJ
Therefore, the standard enthalpy change for the reaction is -633.2 kJ.
when you discuss calories in food you are talking about kilocalories (Kcal) which is the amount of heat necessary to raise 1000 mL of water by 1 degree Celsius which is approximately 4.18 kJ. compare the number of Kilocalories in one gram of tomatoes to the number of Kilocalories in one gram of corn chips
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100 g of corn chips has 17.69 calories
1 g of corn chips has 17.69/100 or 0.1769 calories
Therefore, 1 g of tomatoes has 0.1769 x 10⁻³ kilocalories
100 g of corn chips has 518 calories
1 g of corn chips has 518/100 or 5.18 calories
Therefore, 1 g of corn chips has 5.18 x 10⁻³ kilocalories
Which equation represents the reduction half-reaction for this redox equation?
Mg + CuSO4 MgSO4 + Cu
A. Cu Cu
B. Cu + 2e- Cu
C. Cu Cu + 2e-
D. Cu + 3e- Cu,
Answers
The oxidation number of Cu in CuSO₄ is +2 and 0 in Cu, the free elemental form. As the oxidation of Cu decreases from +2 to 0, we are looking at the reduction half-reaction for the given redox reaction:
Cu²⁺ + 2e⁻ → Cu
The correct answer is option B.
#1: Lemon juice is a weak acid. It has a [H+] of 5.0 × 10^-2 M. What is the pH of lemon juice?
A. 1.0
B. 1.3
C. 5.0
D. 7.5
***my answer: B. 1.3
is that right?,
Answers
So pH of lemon juice = - log [H+] = - log (0.05)
pH = - log (0.05)
pH = - (-1.3) = 1.3
So the pH of the Lemon Juice = 1.3
How many grams of ch3oh must be added to water to prepare 325 ml of a solution that is 4.50 mch3oh?
Answers
V(solution) = 325 ml ÷ 1000 ml/l = 0,325 l.
c(CH₃OH) = 4,5 M = 4,5 mol/L.
n(CH₃OH) = V(solution) · c(CH₃OH).
n(CH₃OH) = 0,325 l · 4,5 mol/l.
n(CH₃OH) = 1,4625 mol.
m(CH₃OH) = n(CH₃OH) · M(CH₃OH).
m(CH₃OH) = 1,4625 mol · 32 g/mol.
m(CH₃OH) = 46,8 g.
How many molecules does 0.773 moles of Ca(OH)2 contain?
Answers
0,773 moles of Ca(OH)₂ contain 4,653 · 10²³ molecules.
To calculate that we need to use the Avogrado Number. This number tells us the number of molecules that are in 1 mol of a substance. The name "Avogrado Number" was given in honor of Amadeo Avogadro, an Italian scientist who studied atomic theory. The number is 6,02· 10²³ molecules/mol. To calculate the number of Ca(OH)₂ molecules we use the following conversion factor:
[tex]nmolecules=0,773 moles Ca(OH)_2* \frac{6,02* 10^{23} molecules Ca(OH)_2 }{1 mol Ca(OH)_2} \\ \\ =4,653 * 10^{23} molecules Ca(OH)_2[/tex]
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Therefore; 1 mole of Ca(OH)2 contains 6.022×10^23 molecules
Thus; 0.773 moles contains;
0.773 × 6.022 ×10^23 molecules
= 4.655 ×10^23 molecules
The helium flash converts helium to the heavier element _____.
Answers
The helium flash, a nearly explosive ignition in a red giant star's core, converts helium into carbon through the triple-alpha process. This marks a crucial step in stellar evolution involving the production of heavier elements. Recognized by two protons in its nucleus, helium exists as the second most abundant element in the universe.
Explanation:The helium flash refers to a nearly explosive ignition of helium as a part of the triple-alpha process in the dense core of a red giant star. During the helium flash, helium (a lighter element) is converted into a heavier element, specifically, carbon. Managed through a sequence called the triple-alpha process, three helium-4 nuclei combine to form a carbon-12 nucleus.
The process of forming helium from hydrogen involves addition of another proton to create the helium nucleus, emitting significant energy. As a part of stellar evolution, the complete exhaustion of helium in the core leads to the production of heavier elements like oxygen, neon, and magnesium, by the fusion of carbon.
For context, helium is the second-most abundant element in the universe, discovered in 1868, and is defined by its two protons within the nucleus. This element is most commonly known as the light gas used to inflate balloons.
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Please use the below balanced equation to answer this question. 2H2(g) + O2(g) -> 2H2O(l) How many grams of water will be produced if I have 83.4 liters of oxygen gas at STP?
A) 48.65 grams H2O
B) 65.78 grams H2O
C) 85.71 grams H2O
D) 134.18 grams H2O
Answers
This rule is applied to O₂
22.4 L volume occupied by 1 mol
Therefore 83.4 L occupied by - 1/ 22.4 x 83.4 = 3.72 mol
stoichiometry of O₂ to H₂O is 1:2
then the number of moles of water produced - 3.72 mol x 2= 7.44 mol
mass of water produced - 7.44 mol x 18.01 g/mol = 134.1 g
correct answer is D
Marco wants to investigate the chemical properties of sodium bicarbonate, or baking soda. He plans to carry out the tests below.
Test 1: Mix a teaspoon of sodium bicarbonate into a cup of warm water to see if it dissolves.
Test 2: Mix a teaspoon of sodium bicarbonate into a cup of vinegar to see if it fizzes.
Test 3: Heat a teaspoon of sodium bicarbonate in the oven to see if its melting point is less than 400 degrees Fahrenheit.
Which statement provides the best assessment of his tests?
Only Test 3 will indicate a chemical property of sodium bicarbonate. Tests 1 and 2 will show a physical property of the substance.
Only tests 1 and 2 will indicate chemical properties of sodium bicarbonate. Test 3 will show a physical property of the substance.
Only Test 2 will indicate a chemical property of sodium bicarbonate. Tests 1 and 3 will show a physical property of the substance.
Only tests 1 and 3 will indicate chemical properties of sodium bicarbonate. Test 2 will show a physical property of the substance.
Answers
Solubility in water and melting point of substance are physical property. In test 2 there is chemical property (chemical reaction):
NaHCO₃ + CH₃COOH → H₂O + CO₂ + CH₃COONa.
Answer:
Only Test 2 will indicate a chemical property of sodium bicarbonate. Tests 1 and 3 will show a physical property of the substance.
Explanation:
1) In test 1 we are dissolving sodium bicarbonate and here there is no chemical change in the property of sodium bicarbonate if it dissolved so it is a pure physical process.
2) In test 2 we are reacting sodium bicarbonate with vinegar (acetic acid).
The reaction is:
[tex]NaHCO_{3}+CH_{3}COOH--->CH_{3}COONa+H_{2}O+CO_{2}[/tex]
Due to formation of carbon dioxide it fizzes. Thus this is a chemical property of sodium bicarbonate to acts as base.
3) In test 3, we are heating and testing the melting point of sodium bicarbonate, which is again a physical property.
A force has to push the bug forward. Identify this force. How does the bug produce it?
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This force is kinetic energy. The bug generates this force by using energy to move its leg(s), making it move forward. The origin of the energy comes from the food that the bug eats. The food is then turned into calories (energy) and stored as potential energy before the bug uses it as kinetic energy.
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Compare and contrast the properties of acids and bases. include two similarties and two differences.
Answers
Similarities:
-They can conduct electric current because they both are ionic substances.-
-They both form Water and Salt when neutralized.
Differences:
-Acids release Hydronium ions (H₃O⁺) when hydrolyzed while Bases release Hydroxyl ions (OH⁻) when hydrolyzed.
-Acids are commonly formed with non-metals (such as Chlorine, Sulfur, Oxygen, and Nitrogen) while Bases are commonly formed with metals (such as Sodium, Potassium, Calcium, and Copper).
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Acids and bases are similar in that they conduct electricity in aqueous solutions and both react to form salt and water. Their differences lie in taste, color changes in litmus paper, and pH values where acids have pH lower than 7 and bases have pH greater than 7.
Explanation:Acids and bases are both types of compounds that chemists often deal with. They are similar in that they both conduct electricity when in aqueous solution and they both react with each other to form salt and water, a reaction known as neutralization. However, they are also distinctly different. The first difference is that acids have a sour taste and can turn blue litmus paper red, while bases have a bitter taste and can turn red litmus paper blue. Additionally, acids tend to have a pH less than 7, whereas bases have a pH greater than 7.
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An isotope contains 56 protons, 54 electrons, and 74 neutrons. What is the identity of the isotope?
Answers
hope this helps
Answer:
The element will be represented as : [tex]Ba_{56}^{130}[/tex]
Explanation:
The identity of an element (isotope) is with its atomic number.
The atomic number is the number of protons in the element.
Irrespective of the number of electrons / neutrons the atomic number will be equal to the number of protons only.
atomic number of the isotope is 56.
The element with 56 atomic number is Barium
The mass number of Barium = protons + neutrons = 56 + 74 = 130
The element will be represented as : [tex]Ba_{56}^{130}[/tex]
URGENT
1. An igneous rock that forms from long, slow cooling is characterized by
A: no crystallization
B: microscopic crystals
C: large, well-defined crystals
Question 2.2. Igneous rocks form when
A: collected sediments accumulate over time
B: extreme heat and pressure change a pre-existing rock
C: magma cools and solidifies
Question 3.3. An igneous rock displays coarse-sized grains that can easily be seen with the naked eyes. The rock is most likely
A: extrusive
B: intrusive
C: volcanic,
Answers
1. C: large, well-defined crystals
2. C: magma cools and solidifies
3. B. Intrusive
Crystals form when molecules collect into an ordered structure. In order for this to happen, the molecules need to be free to move. So if the cooling happens suddenly, the molecules go from a liquid to a solid rapidly before they have a chance to form large crystals. So fast cooling = none to small crystals. Slow cooling = large crystals. With that in mind, let's look at the questions and options.
1. An igneous rock that forms from long, slow cooling is characterized by.Since we're talking slow, this means large crystals, which is option "C: large, well-defined crystals"
2. Igneous rocks form when.
Igneous rock is one of the 3 major types of rock. Since igneous comes from the Latin word ignis meaning fire, igneous rocks are those rocks that come from the cooling of molten material such as lava or magma. This matches option "C: magma cools and solidifies"
3. An igneous rock displays coarse-sized grains that can easily be seen with the naked eyes. The rock is most likely
Since the grains are easily seen, this indicates that the rock cooled reasonably slowly. Of the available options, extrusive doesn't work since extrusive rock occurs when magma reaches the surface and cools rapidly, so you have small crystals. Intrusive does work since in that case magma cools slowly and therefore has larger crystals. And since both extrusive and intrusive rocks can be considered volcanic, volcanic is just too general a term since intrusive describes the rock more accurately. Therefore the answer is "B. Intrusive"
Plants make food through photosynthesis, a chemical reaction. What are the starting substances of the reaction? hydrogen, oxygen, and carbon oxygen, solar energy, and water carbon dioxide, solar energy, and oxygen carbon dioxide, water, and solar energy
Answers
Photosynthesis is a chemical process used by plants where solar energy is used to transform carbon dioxide and water into carbohydrates and oxygen.
What is photosynthesis?It is the biochemical process by which plants convert inorganic matter (carbon dioxide and water) into organic matter (sugars), taking advantage of energy from sunlight.
This process constitutes one of the most important biochemical mechanisms on the planet since it involves the manufacture of organic nutrients that store light energy from the Sun.
Therefore, we can conclude that photosynthesis is the process carried out by plants to transform inorganic matter (Carbon dioxide, water and solar energy) into organic substances.
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How many nitrogen-14 atoms does it take to equal the mass of three calcium-42 atoms?question 6 options:8.5793impossible to determine without additional information?
Answers
It takes 9 nitrogen-14 atoms to equal the mass of three calcium-42 atoms.
Nitrogen-14 and Calcium-42 are isotopes of Nitrogen and Calcium, respectively. The numbers 14 and 42 refers to the mass of those atoms, so, for calculation how many nitrogen 14 atoms does it take to equal the mass of three calcium-42 atoms we need to divide the mass of three calcium-42 atoms between the mass of 1 nitrogen-14 atom:
[tex] \frac{3*m^{42}Ca}{m^{14}N}= \frac{3*42}{14}=9 atoms^{14}N [/tex]
So, the required amount of Nitrogen-14 atoms would be 9
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the answer is 9. took the test and got it correct
Thermal energy is the energy associated with..
electric fields.
being stored in chemical bonds.
the pull of gravity.
temperature.
@aaronq,
Answers
Answer:
D. Temperature
Explanation:
This is the correct answer on edge.
Where do the OH- ions go as additional acid is added?
1. they evaporate.
2. They combine with excess H+ ions to form more water.
3. They remain in solution at the same concentration.
4. They remain in solution but change concentration.,
Answers
Answer:
A: They evaporate
Explanation:
Where do the OH- ions go as additional acid is added? They evaporate. They combine with excess H+ ions to form more water. They remain in the solution at the same concentration.
Sodium ions are present in relatively small concentrations compared to other extracellular cations true or false
Answers
The answer is false.
Within the extracellular fluid (ECF), the major cation is sodium (Na⁺) while the major cation in the intracellular fluid is potassium (K⁺). Sodium-potassium pump, is a solute pump that pumps three sodium ions out of the cell in exchange for two potassium ions pumped in the cell, both against their concentration gradients.These electrolytes play an important role in maintaining homeostasis. The ECF, in particular the interstitial fluid, is surrounding all of the cells in the body and therefore is crucial for their normal functions. The ECF is maintained by a number of homeostatic mechanisms including regulation of sodium concentration.
Potassium, calcium (Ca²⁺) and magnesium (Mg²⁺)are cations that are present in relatively small concentrations in ECF.
A ________ zone is the place where two lithospheric plates converge, one riding over the other. Most volcanoes on land occur parallel to the boundary between the two plates.
a.continental
b.convergent
c.subduction
d.volcanowhat fits in the blank?
Answers
The answer is C. Subduction
Two or more atoms of different elements covalently bonded together are referred to as __________.
Answers
Justification:
1) The chemical combination of two or more different elements is called compound. Each compound has a unique composition and specific properties, which make it different from the elements (atoms) of which it is constituted.
2) The chemical union is called chemical bond. The chemical bonds between elements can be matallic bonds, ionic bonds, or covalent bond.
3) The metallic and ionic bonds do not lead to proper molecules because the structure is continuos.
4) The covalent bonds lead to units named molecules. Some examples of molecular compounds are; CH4, C2H6, C3H8, C4H10.
Enough of a monoprotic acid is dissolved in water to produce a 0.0121 M solution. The pH of the resulting solution is 6.49. Calculate the Ka for the acid.,
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The volume of a gas is reduced from 4 l to 0.5 l while the temperature is held constant. what does the pressure of the gas do?
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The pressure of the gas increases when its volume is reduced from 4 L to 0.5 L at constant temperature, according to Boyle's Law, which dictates an inverse relationship between volume and pressure for a given amount of gas.
When the volume of a gas is reduced from 4 L to 0.5 L while the temperature is held constant, according to Boyle's Law, the pressure of the gas increases. Boyle's Law states that at constant temperature, the volume of a fixed number of moles of a gas is inversely proportional to the pressure applied to it. This means that if you decrease the volume of the gas, the pressure must increase to compensate, assuming the amount of gas does not change.
Therefore, in this case where the volume decreases by a factor of 8 (from 4 L to 0.5 L), the pressure must increase by the same factor, assuming that no gas escapes and the temperature remains constant. It's important to note that these principles assume ideal gas behavior and may not perfectly model real gases under all conditions.
list the 7 diatomic molecules
Answers
Answer is: nitrogen(N₂), oxygen(O₂), hydrogen(H₂), carbon monoxide(CO), calcium oxide(CaO), hydrogen chloride(HCl), sodium hydride(NaH).
Diatomic molecules are molecules made of two atoms.
They can be homonuclear (molecule made of two atoms of the same element) and heteronuclear (molecule made of two different atoms).
How many grams are in .98 mols of C6H12O6 (*round to the nearest hundredth and include the unit "g C6H12O6" after your number)
Answers
6C = 12*6 = 72
12H=1*12 = 12
O6 = 16*6 = 96
Total = 180 grams
0.98 mol
0.98 * 180 = 176.40 My answer would have to go out to 176.40
Note: anyone responding will use rounded numbers for the atomic mass. All periodic tables have variations in them. Use your periodic table to get the better atomic mass.
Answer
176.40 g C6H12O6 <<<<
What is the term for a type of reaction in which an acid and a base react to produce a salt and water?
Answers
is the probable answer, which I don't know how to explain, but I know that's the answer because I learned about it a few years ago and I'm pretty smart. =]
Why do the number of atoms of each element have to be the same on both sides of the equation?
Answers
How do you think the number of valence electrons relates to an element's chemical properties?
Answers
Answer:
Electrons in the outermost shell are called valence electrons, because it is their interactions that determine the chemical properties of an element. The columns that were set up to group elements by similar chemical properties turn out to be the exact same columns defined by the number of valence electrons.
The valence electron of an element determines the group of the element and elements in the same group have similar chemical properties.
The valence electron of an element indicates its the group of the element in the periodic table. Elements found within the same group in the periodic table have similar chemical properties.
For example:
group 1 elements (Alkali metals) have similar chemical propertiesgroup 7 elements (halogens) have similar chemical propertiesThus, we can conclude that valence electron of an element determines the group of the element and elements in the same group have similar chemical properties.
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