Answer: Harold car has better mileage
Explanation: US gallon is 3.785 litres and one mile is 1.6 km.
35 · 1.6 km/ 3.785 l = 14.8 km/l
The Harold's car has a fuel efficiency of 35 miles per gallon and has better gas mileage.
What is efficiency?The efficiency is defined as the peak level of performance that uses the least amount inputs to achieve the highest amount of output.
Effectiveness is the ability to produce a better result, one that delivers more value or achieves a better outcome.
Efficiency is expressed as
Efficiency = output / input
The mileage of Harold's can be calculated as:
US gallon has 3.785 liters and 1 mile is 1.6 km
Thus mileage = 35 x 1.6 km / 3.785 l
= 14.8 km/l
Mileage of Frank's car = 12 x 1.6 km / 3.785 l
= 5.07 km/l
Thus, the Harold's car has a fuel efficiency of 35 miles per gallon and has better gas mileage.
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Need Help!!
Explain the relationship between volume and temperature (Charles’ Law)
Answer:
the volume of a give gas simple is directly propotional assolute temperature at constant pressure .the volume of a gavi. amount of gass is inversely propotional ot Its pressure when temperature is help constant
A sample of Xe gas is observed to effuse through a pourous barrier in 4.83 minutes. Under the same conditions, the same number of moles of an unknown gas requires 2.29 minutes to effuse through the same barrier. The molar mass of the unknown gas is _____ g/mol.
Answer:
28.93 g/mol
Explanation:
This is an extension of Graham's Law of Effusion where [tex]\frac{R1}{R2} = \sqrt{\frac{M2}{M1} } = \frac{t2}{t1}[/tex]
We're only talking about molar mass and time (t) here so we'll just concentrate on [tex]\sqrt{\frac{M2}{M1} } = \frac{t2}{t1}[/tex]. Notice how the molar mass and time are on the same position, recall effusion is when gas escapes from a container through a small hole. The time it takes it to leave depends on the molar mass. If the gas is heavy, like Xe, it would take a longer time (4.83 minutes). If it was light it would leave in less time, that gives us somewhat an idea what our element could be, we know that it's atleast an element before Xenon.
Let's plug everything in and solve for M2. I chose M2 to be the unknown here because it's easier to have it basically as a whole number already.
[tex]\sqrt{\frac{M2}{131} } = \frac{2.29}{4.83}[/tex]
The square root is easier to deal with if you take it out in the first step, so let's remove it by squaring each side by 2, the opposite of square root essentially.
[tex](\sqrt{\frac{M2}{131} } )^2= (\frac{2.29}{4.83})^2[/tex]
[tex]{\frac{M2}{131} } = (0.47)^2[/tex]
[tex]{\frac{M2}{131} } = 0.22[/tex]
M2= 0.22 x 131
M2= 28.93 g/mol
How many individual atoms are represented in the reactants of the equation shown below?
There are 3 individual atoms are represented in the reactants of the equation.
What is an atom?An atom is a particle of matter that uniquely defines a chemical element. An atom consists of a central nucleus that is surrounded by one or more negatively charged electrons. The nucleus is positively charged and contains one or more relatively heavy particles known as protons and neutrons.
In the reactants given, we have methane which has 2 individual atoms (Carbon and hydrogen) and oxygen has 1 individual atom.
Therefore, There are 3 individual atoms are represented in the reactants of the equation.
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The horse achieved its highest status during the___________dynasty (618-906 CE), a time of unparalleled political, artist, and cultural greatness.
A. Qin
B. Han
C. Tang
D. Shang
(c) Write the balanced neutralization reaction and calculate the volume in mL of a 1.420 M NaOH solution required to titrate 25.00 mL of a 5.400 M H2SO4 solution
Answer:
2NaOH + H₂SO₄ → Na₂SO₄ + 2H₂O
190.14 mL of the NaOH solution would be required.
Explanation:
The balanced reaction is:
2NaOH + H₂SO₄ → Na₂SO₄ + 2H₂ONow we calculate how many H₂SO₄ moles are there in 25.00 mL of a 5.400 M solution, using the definition of molarity:
Molarity = moles / litersMoles = Molarity * liters25.00 mL * 5.400 M = 135 mmol H₂SO₄Now we convert H₂SO₄ moles into NaOH moles, using the stoichiometric coefficients of the balanced reaction:
135 mmol H₂SO₄ * [tex]\frac{2mmolNaOH}{1mmolH_2SO_4}[/tex] = 270 mmol NaOHFinally we calculate the volume of a 1.420 M solution that would contain 270 mmoles:
Molarity = moles / litersliters = moles / molarity270 mmol / 1.420 M = 190.14 mLWhat is the molality of a solution made with 5.6kg of water and 2.11moles of solute?
Answer:
THE MOLARITY IS 2.22 MOL/DM3
Explanation:
The solution formed was as a result of dissolving 37.5 g of Na2S in 217 g of water
Relative molecular mass of Na2S = ( 23* 2 + 32) = 78 g/mol
Molarity in g/dm3 is the amount of the substance dissolved in 1000 g or 1 L of the solvent. So we have;
37.5 g of Na2S = 217 g of water
( 37.5 * 1000 / 217 ) g = 1000 g of water
So, 172.81 g/dm3 of the solution
So therefore, molarity in mol/dm3 = mol in g/dm3 / molar mass
Molarity = 172.81 g/dm3 / 78 g/mol
Molarity = 2.22 mol/dm3
The molarity of the solution is 2.22 mol/dm3
Explanation:
PLEASE ANSWER ILL GIVE BRAINLY ASAP!!! A student stands in exactly the same location facing north at different times throughout the day. She also observes the suns position in the sky. She draws the following diagram to show what she observed. PLEASE SHOW A DRAWING ON THE RESULTS
Answer:i do not get it
Explanation:
1. A student performed the titration as in this experiment. He transferred a 2.00 mL sample of the
acid into a flask, diluted it with water, and then began to add sodium hydroxide solution from the
buret. After adding 50 mL of NaOH solution, the sample in the flask still had not turned pink.
What error did the student make?
Answer:
The student shouldn't have added water to the acid.
Explanation:
The aim of titration is to standardize an unknown solution. Recall that a standard solution is one whose concentration is known.
After the acid has been prepared, it has a particular concentration. The student should't have diluted it further. The further dilution of a small volume of acid drastically reduces the concentration of the acid to such low value that the H^+ ions present are insufficient to react with the OH^- from base in order to turn the solution to pink.
Which of the following preparation of salt is incorrect? *
Acid + alkali
Acid + hydrogen
Acid + carbonate
Acid + metal oxide
Answer:
acid + hydrogen
Explanation:
gives a good combination
A sample of neon gas at 52°C and a volume of 2.5 liters is cooled to 25°C. Calculate the new volume of the neon.
The new volume of the neon gas as its temperature is reduced is 2.29L.
Charles's lawCharles's law states that "the volume occupied by a definite quantity of gas is directly proportional to its absolute temperature.
It is expressed as;
V₁/T₁ = V₂/T₂
Given the data in the question;
Initial temperature of gas T₁ = 52°C = 325.15KInitial volume of gas V₁ = 2.5LFinal temperature T₂ = 25°C = 298.15KFinal volume V₂ = ?To determine the new volume of the neon gas, we substitute our given values into the expression above.
V₁/T₁ = V₂/T₂
V₂ = V₁T₂ / T₁
V₂ = ( 2.5L × 298.15K ) / 325.15K
V₂ = 745.375LK / 325.15K
V₂ = 2.29L
Therefore, the new volume of the neon gas as itstemperature is reduced is 2.29L.
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Which is not a critical part of collision theory?
orientation
energy
amplification
collisions
Answer:
Amplification
Explanation:
Which change is an environmental effect of destroying wetlands?
loss of habitat
less flooding
smog
acid rain
Answer: Trust me 100% plz its loss of habitat wat they said
Explanation:
HELPPPP FASTTT! 4. Which is more electronegative?
A. Fluorine
B. Chlorine
C. Bromine
D. Iodine
Explain Your Answer Choice
Answer:
D.lodine
Explanation:
Lodine is a nonsteroidal anti-inflammatory drug . It works by reducing hormones that cause inflammation and pain in the body. Lodine is used to treat mild to moderate pain, osteoarthritis, or rheumatoid arthritis.
I hope it's helpful for you......
pls help!!!!
Predict the missing component
in the nuclear equation.
1331 → X + -e
A
B
с
131 Cs
131Xe
1311
55
54
53
Answer: b
Explanation:
its b
The missing component in the nuclear equation.1331 → X + -e will be 131Xe54. option B is correct.
What is nuclear reaction?The particles in the nucleus are changed, and one element is transformed into another element when particles in the nucleus are gained or lost.
Nuclear reactions are processes in which one or more nuclides are produced from the collisions between two atomic nuclei or one atomic nucleus and a subatomic particle.
This was the first observation of an induced nuclear reaction, that is, a reaction in which particles from one decay are used to transform another atomic nucleus.
The most notable man-controlled nuclear reaction is the fission reaction which occurs in nuclear reactors. A target nucleus are within the range of nuclear forces for the time allowing for a large number of interactions between nucleons.
therefore , option B is correct.
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What is the total pressure inside a flask that contains 2.15 atm helium, 4.62 atm xenon, and 0.65 atm argon?
Answer:
7.42 atm
Explanation:
The total pressure is just the sum of partial pressures:
2.15 + 4.62 + 0.65 = 7.42 atm
What happens when you mix lead nitrate and hydrogen peroxide?
Answer:
Sorry I dont know I just need points
Explanation:
Have a good day :)
Answer: Lead Nitrate combines with HYDROGEN PEROXIDE, REDUCING AGENTS, POWDERED CARBON, LEAD HYPOPHOSPHITE, AMMONIUM THIOCYANATE, POTASSIUM ACETATE, and POWDERED METALS. Lead Nitrate is a Powerful OXIDIZER that can ignite ORGANIC and COMBUSTIBLE MATERIALS.
Explanation:
calcium + nitrous acid → calcium nitrite
+
nitrogen monoxide
+ water
Answer:
It is double displacement reaction
BRAINLIESTTTT
If a solution has pOH of 5.2 the pH of the solution is?
A. 0.17
B. 5.2
C. 6x10-6
D. 8.8
Answer:
D 8.8
Explanation:
To solve this question you must know that, using the kw equation:
Kw = 1x10⁻¹⁴ = [H⁺] [OH⁻]
-log 1x10⁻¹⁴ = -log ([H⁺] [OH⁻])
14= -log [H⁺] + -log [OH⁻]
As pH = -log[H⁺] and pOH = -log [OH⁻]
we can obtain the equation:
pH = 14 - pOH
As the pOH of the solution is 5.2:
pH = 14 - 5.2
pH = 8.8
Right option is:
D 8.8A sample of Xe gas is observed to effuse through a pourous barrier in 4.83 minutes. Under the same conditions, the same number of moles of an unknown gas requires 2.29 minutes to effuse through the same barrier.
The molar mass of the unknown gas is
_____ g/mol.
Answer:
28.93 g/mol
Explanation:
This is an extension of Graham's Law of Effusion where [tex]\frac{R1}{R2} = \sqrt{\frac{M2}{M1} } = \frac{t2}{t1}[/tex]
We're only talking about molar mass and time (t) here so we'll just concentrate on [tex]\sqrt{\frac{M2}{M1} } = \frac{t2}{t1}[/tex]. Notice how the molar mass and time are on the same position, recall effusion is when gas escapes from a container through a small hole. The time it takes it to leave depends on the molar mass. If the gas is heavy, like Xe, it would take a longer time (4.83 minutes). If it was light it would leave in less time, that gives us somewhat an idea what our element could be, we know that it's atleast an element before Xenon.
Let's plug everything in and solve for M2. I chose M2 to be the unknown here because it's easier to have it basically as a whole number already.
[tex]\sqrt{\frac{M2}{131} } = \frac{2.29}{4.83}[/tex]
The square root is easier to deal with if you take it out in the first step, so let's remove it by squaring each side by 2, the opposite of square root essentially.
[tex](\sqrt{\frac{M2}{131} } )^2= (\frac{2.29}{4.83})^2[/tex]
[tex]{\frac{M2}{131} } = (0.47)^2[/tex]
[tex]{\frac{M2}{131} } = 0.22[/tex]
M2= 0.22 x 131
M2= 28.93 g/mol
A person has a systolic pressure of 174 mm Hg. What percentage of normal (120 mm Hg) is this?
Answer:
145%
Explanation:
175/12 = 14.5
14.5 * 10 = 145%
A person has a systolic pressure of 174 mm Hg. Then the normal percentage is 145 mm Hg.
What is systolic pressure ?Systolic blood pressure, which is the first number, gauges the pressure in your arteries when your heart beats. Diastolic blood pressure, or the second number, gauges the pressure in your arteries between heartbeats.
Two numbers are used to represent blood pressure values. The highest figure represents the maximal pressure that the beating heart can produce (systolic pressure). The pressure in the arteries between beats is shown by the bottom number (diastolic pressure).
The causes of high systolic blood pressure are numerous. Our arteries tighten as we age, which over time helps to cause high blood pressure. High blood pressure can also be brought on by the genes we inherit. High blood pressure can also result from underlying disorders including thyroid illness, excessive cortisol, and obesity.
Thus, the normal percentage is 145 mm Hg.
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What is the change in electrons for sulfur in the following
reaction?
SO2 (aq) + Cr2O7^2-(aq) -> SO4^2- (aq) + Cr^3+ (aq)
A. Gain 3 electrons
B. Gain 5 electrons
C. Lose 2 electrons
D. Lose 1 electron
Answer:
Sulfate loses 2 electrons to sulphur dioxide.
What is the molarity of NaCl in which AgCl has a molar solubility of 2.38 x 10-9 mol /L? The Ksp for Silver Chloride is: 1.83 x 10-10.
Answer:
The concentration of this NaCl solution is 0.0769M
Explanation:
Hello there!
In this case, since we are dealing with a solubility equilibrium in which it is desired to compute the concentration of a common-ion effect to chloride solution in the form of NaCl, we can set up the equilibrium reaction and expression:
[tex]AgCl(s)\rightleftharpoons Ag^+(aq)+Cl^-(aq)\\\\Ksp=[Ag^+][Cl^-]\\[/tex]
It is possible to insert the concentration of starting chloride ions provided by the ionization of NaCl and in terms of the molar solubility, s, equal to 2.38x10^{-9}M:
[tex]Ksp=(s)(C+s)\\\\1.83x10^{-10}=(2.38x10^{-9})(M+2.38x10^{-9})[/tex]
Thus, solving for M, we obtain:
[tex]\frac{1.83x10^{-10}}{2.38x10^{-9}} =M+2.38x10^{-9}\\\\M=\frac{1.83x10^{-10}}{2.38x10^{-9}} -2.38x10^{-9}\\\\M=0.0769M[/tex]
Thus, the concentration of this NaCl solution is 0.0769M.
Best regards!
what is a null hypothesis
Answer:
In inferential statistics, the null hypothesis is a default hypothesis that a quantity to be measured is zero.
How many carbon atoms are in 1.25 mol of silver acetate?
The number of carbon atoms present in 1.25 mol of silver acetate is 1.875 × 10²³.
What is Avogadro's number?Avogadro's number is define as the number of atoms of any substance present in one mole of that substance, and it is equal to 6.022 × 10²³, i.e.
1 mole = 6.022 × 10²³ atoms/mol
Given moles of silver acetate = 1.25 moles
Number of atoms of silver acetate in 1.25 moles = 1.25 × 6.022 × 10²³ = 7.5×10²³
Molecular formula of silver acetate is CH₃CO₂Ag, means in this molecule total 8 atoms are present so number of carbon atom will be calculated as:
Carbon atoms = (2× 7.5 × 10²³) / 8 = 1.875 × 10²³ atoms [here we multiply by 2 because 2 atoms of carbon is present in olecule]
Hence required atoms of carbon is 1.875 × 10²³.
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Climate change is ONLY caused by human activities
OTrue
O False
Answer:
That is False
Explanation:
That is false because climate change happen due to Wind, rainfall etc
Hydrogen and oxygen react under a specific set of conditions to produce water according to the following equation.
2 H2(g) + O2(g) 2 H2O(g)
(a) How many moles of hydrogen would be required to produce 2.8 mol of water?
(b) How many moles of oxygen would be required?
Answer:
fccdsetyujvreettyukknop
Question 5 of 10
Transmutation occurs during which types of radioactive decay?
O A Beta gamma and alpha
OB. Gamma and beta
ОООО
O Gamma and alpha
D. Beta and alpha
SUBMIT
Answer:
D. Beta and Alpha
Explanation:
Just took it on Ap3x
Transmutation occurs during Beta and alpha radioactive decay, Hence option D is correct.
What is nuclear reaction ?There are two types of nuclear reactions. Nuclear fission and nuclear fusion.
Nuclear reactions are classified into two types: fission and fusion. Nuclear fusion is the collision of two or more light nuclei to produce a heavier nucleus. Nuclear fusion happens in low-atomic-number elements such as hydrogen. Nuclear fusion is the inverse of nuclear fission, in which heavy atoms scatter and lighter elements are produced. Nuclear fusion and fission both provide massive quantities of energy.
A nuclear process in which low-atomic-number atomic nuclei fuse to form a heavier nucleus, releasing energy.
Every star in the universe, including the sun, is alive because of nuclear fusion. As a result of this activity, they create enormous amounts of heat.
Fission is a nuclear phenomenon in which a heavy nucleus spontaneously fractures or collides with another particle, releasing energy. Nuclear fission happens when an atom's nucleus splits into lighter nuclei as a result of a nuclear process. This decay can occur naturally due to radioactive decay, or it can be mimicked in a laboratory by creating the necessary conditions (bombarding with neutrinos). The overall mass of the resulting fragments is less than that of the original. The missing mass is converted into nuclear energy in the preceding step.
Hence option D is correct.
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How many molecules are there in 10 grams of N2I6?
How is an element's most likely oxidation state related to its valence electrons? A. It indicates how many valence electrons the element has. B. It indicates what energy level the valence electrons of that element are in C. It indicates how many electrons are required to complete a full valence shell D. It indicates how many valence electrons have been lost by that element.
Answer:
I would pick C
The element's most likely oxidation state related to its valence electrons "It indicates how many electrons are required to complete a full valence shell."
What is oxidation?
An atom's oxidation count would be the charge an atom would have been in the compound were made up of ions.
What is valence electrons?
The amount of electrons given atom needs to lose or gain to achieve the electrical configuration of the next noble gas as well as inert gas is known as valence.
Its only electrons that an element loses were usually its valence electrons. The largest positive oxidation state of a substance is usually determined by the count of valence electrons.
The element's most likely oxidation state related to its valence electrons "It indicates how many electrons are required to complete a full valence shell."
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What are the steps to balance a chemical equation?
Answer:
Step 1: The Unbalanced Chemical Equation. The unbalanced chemical equation is given to you. ...
Step 2: Make a List. ...
Step 3: Identifying the Atoms in Each Element. ...
Step 4: Multiplying the Number of Atoms. ...
Step 5: Placing Coefficients in Front of Molecules. ...
Step 6: Check Equation. ...
Step 7: Balanced Chemical Equation.
Explanation:
