An electric motor works by converting electrical energy to mechanical energy in order to create motion.
For example,Force is generated within the motor through the interaction between a magnetic field and winding alternating (AC) or direct (DC) current.
This works because…
An electric motor works by converting electrical energy to mechanical energy in order to create motion.
For example,Force is generated within the motor through the interaction between a magnetic field and winding alternating (AC) or direct (DC) current.
This works because…
Answer : When an electric current flows through the wire in the electromagnet, a magnetic field is produced in the coil.
[tex]\:\mathsf{Hope\:this\:helps\:you!}[/tex]
Answer:
when an electric current flows through the wire in the electromagnet , a magnetic field is produced in the coil .
Explanation:
Hope it's helpful for you .........A compound has a percent composition of 38.7% carbon, 9.76% hydrogen, 51.5% oxygen.
Laboratory data shows that the compound's molar mass is 62.0 g/mol. What is the
molecular formula of the compound?
The molecular formula of the compound that has a percent composition of 38.7% carbon, 9.76% hydrogen, 51.5% oxygen is C2H6O2.
How to calculate molecular formula?The molecular formula can be calculated from the empirical formula. The empirical formula of the compound is calculated as follows:
C = 38.7% = 38.7gH = 9.76% = 9.76gO = 51.5% = 51.5gNext, we convert the mass to moles by dividing by their atomic mass:
C = 38.7 ÷ 12 = 3.23molH = 9.76 ÷ 1 = 9.76molO = 51.5÷ 16 = 3.22molNext, we divide by the smallest (3.22)
C = 1H = 3O = 1Hence, the empirical formula of the compound is CH3O
If the molar mass of the compound is 62g/mol;
(CH3O)n = 62
31n = 62
n = 2
(CH3O)2 = C2H6O2
Therefore, the molecular formula of the compound that has a percent composition of 38.7% carbon, 9.76% hydrogen, 51.5% oxygen is C2H6O2.
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Given the following reaction, what is the conjugate acid of ammonia?
The ammonium ion is formed when ammonia accepts a proton from an acid.
What is conjugate acid?The term conjugate acid refers to a specie that is formed when a base accepts a proton. The conjugate acid of ammonia is the ammonium ion.
This is because, the ammonium ion is formed when ammonia accepts a proton from an acid.
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CH4 + 2 02 > CO2 + 2 H2O
A scientist wants to completely burn 25 L of methane.
How many molecules of oxygen will the scientist need to
complete this experiment?
Answer:
mf i was trying to
find out the same thing
Explanation:
Consider the reaction 2NaN3 → 2Na + 3N2, which is the first reaction that occurs when an air bag expands in a car undergoing a collision. This reaction happens very quickly, as you might suspect.
A graph showing the amount of nitrogen gas (N2) could be best described as which sentence?
A.) The graph line’s general trend is decreasing from left to right.
B.) The graph line’s general trend is absolutely horizontal.
C.) The graph line’s general trend is nearly horizontal.
D.) The graph line’s general trend is increasing from left to right.
Answer:
D) The Graph line’s general trend is increasing from left to right.
Explanation:
N2, a product, will increase over time which means the line of the graph would go up over time. Time increases from left to right so the correct answer is D.
The graph that describes the reaction will have a trend in which the graph is decreasing from left to right.
What is a collision?A collision occurs when two particle bump into each other. We know that a reaction takes place when there is an effective collision between the reacting particles.
In this case, the graph that describes the reaction will have a trend in which the graph is decreasing from left to right.
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Write balanced equations and expressions for ksp for the dissolution of each of the following ionic compounds. Write a balanced equation for the dissolution of baso4
Based on the dissolution equation of BaSO4, the solubility product, Ksp, expression of BaSO4 is: [Ba^{2+}] × [SO4^{2-}]
What is solubility product Ksp of a solute?The solubility product, Ksp, of a substance is an equilibrium constant which expresses the product of the concentration of ions produced by a solute.
The solubility of a solute depends on temperature, thus solubility product also depends on temperature.
The balanced equation for the dissolution of barium sulfate is given below:
BaSO4 ⇌ Ba^{2+} + SO4^{2-}The solubility product for barium sulfate is given as;
Ksp = [Ba^{2+}] × [SO4^{2-}]
Therefore, the solubility product, Ksp, expression of BaSO4 is: [Ba^{2+}] × [SO4^{2-}]
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How does acid react to water mixed with clorine eyedrops
Answer: Chlorine gas is produced when sulfuric acid is mixed with chlorine bleach.
Explanation: This reaction is a function of the change in pH of the solution from alkaline to acidic combined with the strong oxidant properties of hypochlorous acid.
Make sure to reword this in your words!!!Which electromagnetic wave does the student replace the question mark with in the table?
A
radio waves
B
gamma rays
C
infrared waves
D
visible light waves
Answer:
B) Gamma
Explanation:
Gamma is by far the most powerful, and only one that can produce this much energy
option c is your answer.
how many grams of kclo3 are needed to make 30.0 grams of kcl
The mass of potassium chlorate, KClO₃ needed to produce 30 grams of potassium chloride, KCl is 49.33 grams
Balanced equation2KClO₃ —> 2KCl + 3O₂
Molar mass of KClO₃ = 39 + 35.5 + (16×3) = 122.5 g/mol
Mass of KClO₃ from the balanced equation = 2 × 122.5 = 245 g
Molar mass of Kcl= 39 + 35.5 = 74.5 g/mol
Mass of KCl from the balanced equation = 2 × 74.5 = 149 g
SUMMARY
From the balanced equation above,
149 g of KCl were obtained from 245 g of KClO₃
How to determine the mass of KClO₃ neededFrom the balanced equation above,
149 g of KCl were obtained from 245 g of KClO₃
Therefore,
30 g of KCl will be obtained from = (30 × 245) / 149 = 49.33 g of KClO₃
Thus, 49.33 g of KClO₃ are needed for the reaction
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word equation for water
Answer:
The actual reaction to make water is a bit more complicated: 2H2 + O2 = 2H2O + Energy. In English, the equation says: To produce two molecules of water (H2O), two molecules of diatomic hydrogen (H2) must be combined with one molecule of diatomic oxygen (O2). Energy will be released in the process.
Explanation:
Animals burrow into soil is this mechanical weathering or chemical weathering
Answer:
Animals also contribute to mechanical weathering. Digging animals such as moles break apart rocks underground, while the movement of animals on surface rock can scratch the rock's surface or exert pressure that causes the rock to crack.
Explanation:
pls brainlist me, correct me if I'm wrong
Consider the chemical equation. 2h2 o2 right arrow. 2h2o what is the percent yield of h2o if 87.0 g of h2o is produced by combining 95.0 g of o2 and 11.0 g of h2? use percent yield equals startfraction actual yield over theoretical yield endfraction times 100.. 56.5% 59.0% 88.5% 99.7%
The percent yield of H₂O, if 87.0 g of H₂O is produced by combining 95.0 g of O₂ and 11.0 g of H₂ is 87.87%.
How do we calculate mass from moles?Mass of any substance will be calculated by using their moles as:
n = W/M, where
W = given or required mass
M = molar mass
Moles of 95g of Oxygen (O₂) = 95g / 32g/mol = 2.96 moles
Moles of 11g of hydrogen (H₂) = 11g / 2g/mol = 5.5 moles
Given chemical reaction is:
2H₂ + O₂ → 2H₂O
From the stoichiometry of the reaction, it is clear that:
1 moles of O₂ = reacts with 2 moles of H₂
2.96 moles of O₂ = reacts with 2×2.96=5.92 moles of H₂
Here hydrogen is the limiting reagent as it has lower moles and formation of water depends on this only.
2 moles of H₂ = produces 2 moles of water
5.5 moles of H₂ = produces 5.5 moles of water
Mass of 5.5 moles of water will be calculated as:
W = (5.5mol)(18g/mol) = 99g
Given theoretical yield of water = 87g
% yield of water will be calculated as:
% yield = (87 / 99)×100 = 87.87%
Hence required value is 87.87%.
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Answer:
D
Explanation:
Which of the following is not manufactured from high-density polythene?
A. Containers
B. Pipes
C. Candles
D. Toys
Hey there!
C. Candle
Explanation:
Answer. High-density polyethylene or HDPE is a thermoplastic polymer used in the production of plastic bottles, containers, corrosion-resistant pipes, etc. and not used for the production of candles. Commercially available candles are made with paraffin wax.
PLEASE HELP
2. Calcium hydroxide, used to neutralize acid spills, reacts with hydrochloric acid to produce calcium
chloride and water. If you spilled 85.0 grams of hydrochloric acid and put 120 grams of calcium
hydroxide on it, which one is the limiting reactant? Answer:
Answer:
hydrochloric acid (HCl)
Explanation:
balanced equation: Ca(OH)2+2HCl -> CaCl2+2H2O
85.0/36=2.33 mol HCl
120/74=1.62 Ca(OH)2
2.33 mol HCl x 1 mol CaCl2/2 mol HCl = 1.165 mol CaCl2
1.62 mol Ca(OH)2 x 2 mol CaCl2/1 mol Ca(OH)2 = 3.24 mol CaCl2
Acidic oxides are common air pollutants and the source of acid precipitation. Basic oxides are not. Use what you know about these oxides to explain this difference.
Answer:
An acidic oxide reacts with water and produces acid. They are also called acid anhydride, which are oxides that react with water to form an acid, or with a base to form a salt. They are oxides of either nonmetal or of metals in high oxidation states. An oxide is a binary compound that we obtain upon the reaction of oxygen with other elements. Their chemistry can be systematically understood by taking an oxoacid and removing water from it until only an oxide remains. The resulting oxide belongs to this group of substances. Usually, it is the oxide of non-metals. For example, sulfurous acid (SO2), sulfuric acid (SO3), and carbonic acid (CO2) are acidic oxides. Thus, CO2 dissolves in water to give carbonic acid, and NO2 gives a mixture of nitrous and nitric acids. An inorganic anhydride (a somewhat archaic term) is an acid anhydride without an organic moiety.
Explanation:
what is fractional distinction?
Answer:
ANSWERFractional distillation is a technique used to separate miscible liquids that have boiling point difference of less than 25 ºC. The only difference in apparatus between simple and fractional distillation methods is the use of a fractionating column used during fractional distillation.[tex]\sf\large\underline\purple{Fractional\: Distillation:-}[/tex]
Fractional distillation is a type of distillation which involves the separation of miscible liquids.[tex]\rightarrow[/tex]The process involves repeated distillations and condensations and the mixture is usually separated into component parts. The separation happens when the mixture is heated at a certain temperature where fractions of the mixture start to vaporize.
[tex]\rightarrow[/tex]The basic principle of this type of distillation is that different liquids boil and evaporate at different temperatures. So when the mixture is heated, the substance with lower boiling point starts to boil first and convert into vapours.
[tex]\sf\underline\green{Applications\: Of\:Fractional\: Distillation:-}[/tex]
Fractional distillation is used for the purification of water as well as separating acetone and water.Fractional distillation is used in several industries like oil refineries and chemical plants mainly for purification and separation of many organic compounds.Fractional distillation is also used for the separation of (liquefied) air. Components like liquid nitrogen and oxygen as well as concentrated argon are obtained.Distillation is used in the production of high-purity silicon from chlorosilanes. The silicon is widely used in semiconductors.________________________________
Hope it helps you:)
how much electrical energy (in kilowatt-hours) would a 60.0W light bulb use in 60.0 days ifvleft steadily
Answer:
60w x 24 = 1440wh per day
1440 x 60 = 86400 WATTS HOUR FOR 60 DAYS
Explanation:
In short.
86400/1000 = 86.4kwh
brainiest me :> THANK YOU!
Answer:
86.4kwh
Explanation:
What is the main chemical component present in striking surface of a matchbox?
A. Potassium chlorate
B. Phosphorus
C. Potassium
D. Graphite
Answer:
Phosphorus
Explanation:
Actually that's red Phosphorus
The matchstick contains potassium chlorate at topOn reaction between these when we slides them white Phosphorus is formed which burns the match sticksAnswer:
Option B. ( Phosphorus)
Explanation:
Here, we want to select the option which is the main component present in the striking surface of a matchbox
The correct choice here is phosphorus
Red phosphorus which is an allotrope of phosphorus finds use in this particular case. It is the main chemical component present in the striking surface of a matchbox.
Hope this helps!
If you have any queries please ask.
26. Which temperature change indicates an increase
il the average kinetic energy of the molecules in
a sample?
(1) 255 K to 0°C
(2) 355 K to 25°C
(3) 115°C to 298 K
(4) 37°C to 273 K
The temperature change that indicates an increase in the average kinetic energy of the molecules in a sample is 255 K to 0°C.
How does reactions occur?Chemical reactions occur when particles of reactants react or collide with one another, hence, when particles collide faster, reaction also occurs faster.
One of the ways to make reactions occur faster i.e. increasing the average kinetic energy is by increasing the temperature.
The example that depicts an increase in temperature is 255K to 0°C, which is equivalent to 255K to 273K.
Therefore, the temperature change that indicates an increase in the average kinetic energy of the molecules in a sample is 255 K to 0°C.
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4. The students predict that the reaction between hydrogen and sulfur will release a lot of energy. What question could help
provide support for the prediction?
Let's see
[tex]\\ \rm\rightarrowtail H_2+S=H_2S+Heat[/tex]
So
Observe the equation
it releases heat means it's exothermic
So
Question may include+Heatmay include ∆H=+veClassify the following substituents according to whether they are electron donors or electron acceptors relative to hydrogen by the resonance and the inductive mechanisms
Species that have a lone pair of electrons often donate electrons by resonance while substituents that are electron deficient take away electrons by resonance.
What is resonance?The term resonace has to do with the movement of electron pairs in a molecule. Inductive effects has to do with the drawing of electron density towards an atom or bond.
The two effects depends on the nature of a substituent. For instance, species that have a lone pair of electrons often donate electrons by resonance while substituents that are electron deficient take away electrons by resonance.
The question is incomplete hence the exact nature of the substituents can not be determined.
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In resonance, the species with lone pairs donate electrons while the substituent takes electrons away from another species when deficient by resonance.
What is the Inductive and resonance effect?When the electron donor or the withdrawal groups creates the electron density on the molecule then it is called the inductive effect. This results in the creation of permanent dipoles in the bonds of the molecules.
Atom attached to a benzene molecule with higher electronegativity than hydrogen atom then, it will be an acceptor while with lower electronegativity will be a donor.
The movement of the electron pair like lone pair and pi bond in a molecule by the delocalization is called the resonance effect. The electron donation and acceptance depend on the nature of the substituent molecule.
If the atom attached to the benzene molecule is electron-rich, it will be a donor, while the electron-deficient will accept the electron by the method of resonance effect.
Therefore, the nature of the substituent determines the resonance and the inductive effect.
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Can someone please help me? :(
Answer:
Zone A
Explanation:
Because, when facing the sun, the "A" zones would be furthest from the sun, they get the least amount of sunlight (also shows why they are the coldest parts).
The chemical equation shows iron(iii) phosphate reacting with sodium sulfate. 2fepo4 3na2so4 right arrow. fe2(so4)3 2na3po4 what is the theoretical yield of fe2(so4)3 if 20.00 g of fepo4 reacts with an excess of na2so4? 26.52 g 53.04 g 150.8 g 399.9 g
Percentage yield tells the percentage ratio of actual to theoretical yield. The theoretical yield of iron(III) sulfate is 26.52 g.
What is a theoretical yield?The theoretical yield is the product formation from the complete modification of the limiting reagent in a chemical reaction.
The balanced chemical reaction is shown as,
[tex]\rm 2FePO_{4} + 3Na_{2}SO_{4} \rightarrow Fe_{2}(SO_{4})_{3} + 2Na_{3}PO_{4}[/tex]
Moles of ferric phosphate is calculated as:
[tex]\begin{aligned} \rm n &= \rm \dfrac{mass}{molar \; mass}\\\\&= \dfrac{20}{150.82}\\\\&= 0.1326\;\rm mol\end{aligned}[/tex]
From the reaction,
[tex]\dfrac{1 \;\rm mol \; Fe_{2}(SO_{4})_{3} }{2 \;\rm mol \; FePO_{4}}&= \dfrac{\rm X}{ 0.1326 \;\rm mol \; FePO_{4}}[/tex]
Solving for X:
[tex]\begin{aligned} \rm X &= (\dfrac{0.1326}{2}) \times 1 \rm \; mol\\\\&= 0.0663 \;\rm mol \;Fe_{2}(SO_{4})_{3}\end{aligned}[/tex]
Calculating mass from moles:
[tex]\begin{aligned}\rm mass &= \rm moles \times molar \rm \; mass\\\\&= 0.0663 \;\rm mol \times 399.88 \;\rm g/mol \\\\&= 26.51\;\rm g\end{aligned}[/tex]
Therefore, option A. 26.52 gm is the mass of iron(III) sulfate.
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Answer:
A) 26.52
Explanation:
.
Which molecule is a sugar molecule that can be broken down for energy?
Proteins
Peptides
Amino acids
Carbohydrates
Answer:
Carbohydrates
Explanation:
first of all, I took a quiz and got it right but also Carbohydrates fuel the body and are broken down and made into glucose that can be absorbed into the bloodstream. so when absorbed into the bloodstream they travel in the blood to the body's cells where they are used for respiration.
60 points please help me i will appreciate it!
Answer:
[tex]\huge\boxed{\sf T = 682.4 \ K}[/tex]
Explanation:
Given Data:
Mole = n = 0.1 mol
Pressure = P = 530 mmHg = 0.7 atm
Volume = v = 8 L
Ideal gas constant = R = 0.8206 L atm K⁻¹ mol⁻¹
Required:
Temperature = T = ?
Formula:
Pv = nRT
Solution:
Rearranging for T
[tex]\displaystyle T = \frac{Pv}{nR} \\\\T = \frac{(0.7)(8)}{(0.1)(0.08206)} \\\\T = \frac{5.6}{0.008206} \\\\T = 682.4 \ K\\\\\rule[225]{225}{2}[/tex]
What can be told about the age of the fossils in the diagram?
A.
The fossils in layer 5 are the oldest, and the fossils in layer 1 are the youngest.
B.
The fossils in layer 1 are the oldest, and the fossils in layer 5 are the youngest.
C.
All of the fossils are the same age because they were all present during the same period.
D.
Nothing about the ages of the fossils can be determined from the diagram.
Using p and q as variables, write formulas for calculating the probability of an offspring from a population having each of the following genotypes
The genotypes are not found in the question, but p and q can be used to calculate genotypic frequencies by using the equation p2 + 2pq + q2 = 1.
What is the Hardy–Weinberg principle?The Hardy–Weinberg principle is a model used in population genetics to estimate allele and genotypic frequencies in a population.
According to the Hardy–Weinberg principle, the sum of p + q is equal to 1, where p and q represent the dominant and recessive alleles, respectively.
The Hardy–Weinberg principle considers the absence of different evolutionary forces acting on the population.
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The formula for calculating the probability of an offspring from a population having each of the following genotypes is p2 + 2pq + q2 = 1.
What is the genotypic frequency?The number of people with a particular genotype divided by the total number of people in a population is known as genotype frequency.
p2 + 2pq + q2 = 1 is the Hardy Weinberg equation.
Thus, the formula for calculating the probability of an offspring from a population having each of the following genotypes is p2 + 2pq + q2 = 1.
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The equilibrium for the reaction between (ch3)2nh a weak base
The equilibrium for the dissolution of the weak base is ;(CH3)2NH(aq) + H2O(l) ⇄ (CH3)2NH3^+(aq) + OH^-(aq)
What is a weak base?A weak base is one that does not ionize completely in solution. As such, a weak base will have a very low base dissociation constant Kb reflecting its minimal dissociation in solution.
The question is incomplete hence we are are unable to work out the equilibrium but in solution it will look like this;
(CH3)2NH(aq) + H2O(l) ⇄ (CH3)2NH3^+(aq) + OH^-(aq)
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The equilibrium for the reaction between (Ch₃)2NH of the weak base is (CH₃)2NH(aq) + H₂O(l) ⇄ (CH₃)2NH₃⁺(aq) + OH⁻(aq).
What are weak bases?A weak base is one that does not completely dissociate in water.
It leaves only a small proportion of hydroxide ions and the concerned basic radical in the resulting aqueous solution.
A large proportion of dissociated base molecules.
Thus, the equilibrium for the reaction is (CH₃)2NH(aq) + H₂O(l) ⇄ (CH₃)2NH₃⁺(aq) + OH⁻(aq).
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Which of these has an oxidation number of zero (0)? Cal2, Ca CaS, Ca3N2
Ca is the correct answer. Maybe
Please calculate the mass percent of water in the formula: NiSO4.3 H2O
Please help me raise my grade up and I’ll give you brainliest!
Answer:
208.8018 g/Mol you conver the answer by weight and moles