Application of boyle's law a 12-liter tank contains helium gas pressurized to 160 atm. part b what size tank would be needed to contain this same amount of helium at atmospheric pressure (1 atm)? express the size in liters to three significant figures.
Using Boyle's Law, which states that the pressure and volume of a gas at constant temperature are inversely proportional, we can calculate that a tank of about 1920 liters would be needed to contain the same amount of helium at atmospheric pressure.
Explanation:The application of Boyle's law, which describes the inverse relationship between the pressure and volume of a gas at a constant temperature, can assist in determining the size of the tank needed to contain the same amount of helium at atmospheric pressure. This relationship is expressed by the formula P₁V₁ = P₂V₂, where P₁ and V₁ are the initial pressure and volume, and P₂ and V₂ are the final pressure and volume.
Here, the initial pressure (P₁) is 160 atm, the initial volume (V₁) is 12 L, and we want to find the final volume (V₂) at atmospheric pressure (P₂) of 1 atm. By substituting these values into the formula, we have 160 atm * 12 L = 1 atm * V₂. The calculation leads to V₂ = 1920 L.
So, a tank of approximately 1920 liters would be needed to contain the same amount of helium at atmospheric pressure according to Boyle's Law.
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Studies involving humans or animals are conducted under strict policies and procedures. This solution addresses which limitation?
Studies involving humans or animals are conducted under strict policies and procedures, and this solution addresses the ethical concerns as the animals and humans should not be harmed in such processes.
What are the ethical concerns in the scientific experiment?In general, animals such as mice, pigs, and other animals are used in scientific experiments for clinical tests such as vaccine tests, drug tests, and so on for safety reasons, and as a result, the animals' health suffers and they may die. So there are always ethical concerns in scientific research when there is the involvement of animals and humans, and that should be replaced with safe and secure research.
Hence, studies involving humans or animals are conducted under strict policies and procedures, and this solution addresses the ethical concerns as the animals and humans should not be harmed in such processes.
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The question is incomplete, the complete question is here
Studies involving humans or animals are conducted under strict policies and procedures. This solution addresses which limitation?
A) Lack of proper equipment
B) Size of the system
C) Limited amount of time
D) Ethical Concerns
In the presence of oxygen, the three-carbon compound pyruvate can be catabolized in the citric acid cycle. first, however, the pyruvate (1) loses a carbon, which is given off as a molecule of co2, (2) is oxidized to form a two-carbon compound called acetate, and (3) is bonded to coenzyme
a. why is coenzyme a, a sulfur-containing molecule derived from a b vitamin, added?
If a concentration of E. coli exceeding 200 colonies per 100 mL of water is unsafe for swimming, tubing, or rafting, on which of the following collection days and at which of the 2 sites would it have been unsafe to swim, tube, or raft?
The question does not provide specific data for different sites or collection days to determine where swimming would be unsafe. However, if E. coli concentration exceeds 200 colonies per 100 mL water, it's unsafe. Regular sampling and testing is crucial to ensure water safety for recreational activities.
Explanation:The information provided does not include specific data on the concentration of E. coli colonies at different sites or at different collection days, which makes it impossible to identify the days or sites where it would have been unsafe to swim, tube, or raft. However, the concept of unsafe concentrations of E. coli in water can be discussed. The U.S. Environmental Protection Agency (EPA) sets enforceable concentration values for primary contaminants, and these are known as Maximum Contaminant Levels (MCLs). For E. coli, a concentration exceeding 200 colonies per 100 mL is deemed unsafe.
Water sampling and testing for the presence of E. coli is a common microbial testing procedure. In a simplified process, the sample is diluted in lactose broth tubes at different volumes and then incubated. If E. coli is present, it ferments the lactose, causing a color change in the broth. This method helps to estimate the probable number of bacteria per 100 mL of water.
Maintaining good personal hygiene and avoiding untreated water in developing nations is crucial to preventing E. coli infections. Ensuring the safety of recreational water activities involves continuous monitoring and testing of water samples to prevent potential health hazards related to excessive E. coli concentration in the water. In the absence of monitoring and testing, any water body could potentially be unsafe for swimming, tubing, and rafting.
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Sound is not part of a electromagnetic spectrum because
A: Sound is not a type of energy wave
B: Sound is not a type of electromagnetic radiation
C: Sound does not have a wavelength
D: Sound does not have a frequency
Imagine the water is leaking from a container, at a rate of 1.2 ml/hour. If this rate does not change, how many liters of water will be lost in a week?
At a consistent leakage rate of 1.2 mL/hour, a container will lose 0.2016 liters of water over the span of a week.
Explanation:If water is leaking from a container at a rate of 1.2 mL/hour, we can calculate the total amount of water lost in a week by first understanding the total hours in a week and then multiplying this by the rate of leakage.
A week consists of 7 days, and each day has 24 hours, making the total hours in a week 168 hours. Given the rate of 1.2 mL/hour, we multiply this rate by the total hours to find the total volume of water lost over the week:
1.2 mL/hour * 168 hours = 201.6 mL
To convert this volume into liters, we remember that 1000 mL equals one liter. Therefore, dividing 201.6 mL by 1000 gives us the volume in liters:
201.6 mL / 1000 = 0.2016 liters
Thus, at a rate of 1.2 mL/hour, a total of 0.2016 liters of water will be lost in a week.
What effect would a decrease in ph have on the amount of potassium ion in the urine?
The equation represents the combustion of sucrose. C12H22O11 + 12O2 12CO2 + 11H2O If there are 10.0 g of sucrose and 8.0 g of oxygen, how many moles of sucrose are available for this reaction?
Final answer:
To determine the moles of sucrose available, the molar mass of sucrose is calculated and used to convert the given mass of sucrose to moles, resulting in approximately 0.0292 moles.
Explanation:
To calculate the number of moles of sucrose available for the combustion reaction, first, we need to find the molar mass of sucrose (C₁₂H₂₂O₁₁). By adding the atomic masses of carbon (12 atoms × 12.01 g/mol), hydrogen (22 atoms × 1.008 g/mol), and oxygen (11 atoms × 16.00 g/mol), we can determine the molar mass of sucrose to be approximately 342.3 g/mol. Using the mass of sucrose given, we can calculate the number of moles of sucrose as follows:
Convert grams of sucrose to moles using the molar mass: 10.0 g of sucrose × (1 mol / 342.3 g) ≈ 0.0292 moles of sucrose.Therefore, there are approximately 0.0292 moles of sucrose available for the reaction.
Which of the following samples has the greatest population density? a. 125,000 organisms in 2.5 mi2028-02-04-03-00_files/i0170000.jpg b. 13,000 organisms in 1.0 mi2028-02-04-03-00_files/i0170001.jpg c. 150,000 organisms in 4.0 mi2028-02-04-03-00_files/i0170002.jpg d. 100,000 organisms in 0.5 mi2028-02-04-03-00_files/i0170003.jpg
Answer: the correct choice is d) 100000 organisms in 0.5 miles.
Explanation: Population density is directly proportional to the number of species(organisms) and inversely proportional to the land area.
population density = number of organisms/land area
Let's plug in the values for all the choices and see which one gives greatest population density.
a) population density = [tex]\frac{125000}{2.5}[/tex] = 50000
b) population density = [tex]\frac{13000}{1.0}[/tex] = 13000
c) population density = [tex]\frac{150000}{4.0}[/tex] = 37500
d) population density = [tex]\frac{100000}{0.5}[/tex] = 200000
From above calculations, the greatest population density(200000 organism per mile) is for the last choice.
So, the correct choice is d) 100000 organisms in 0.5 miles.
The first letter of a chemical symbol is capitalized.true or false
Answer: True
Explanation: The Periodic Table is an orderly grouping chemical elements known to scientists. This table includes the name of each element, its symbol, atomic mass (weight), and electron distribution. The first letter of each chemical symbol is capitalized.
If you cannot get a chair to move across the floor, it is because ___ friction opposes your push.
Answer:
If you cannot get a chair to move across the floor, it is because ___ friction opposes your push.
Static friction.
Explanation:
Fluid friction is the resistance an object encounters in the water surface so in our case it's incorrect because we can't see any water in our scenario.
Rolling friction is the friction a wheel or sphere finds as resistance in the surface. In our scenario, we are talking about a wheelchair or a chair with small wheels like the office ones. So it is incorrect.
Sliding friction is the friction that an object encounters when it is pushed to move in a surface that slides against the direction of the object. Or that opposes gravitational resistance against the object direction because it is in a certain degree of elevation. Meaning that the surface is perpendicularly pointing the sky.
Static friction is the type of resistance an object finds when it is moved after being static. And this is our answer because the chair was static without wheels.
which sentence correctly describes the position of electrons within an atom?
A. Electrons exist outside the nucleus in indistinct electron clouds
B. electrons orbit the nucleus in distinct circular paths
c. electrons are attatched to the outside of the nucleus
d. electrons orbit the nucleus in uniform concentric circles
Answer: B. electrons orbit the nucleus in distinct circular paths
Explanation: Electrons are found in shells or orbitals that surround the nucleus of an atom.
what tools should a scientist use to measure an object in milligrams
Organic compounds with two oh groups per molecule are called
Why is mercury not “destroyed” when coal containing mercury impurities is burned?
Many toxic manufacturing compounds are securely disposed of through the means of high-temperature combustion. However mercury is not "annihilated" when coal comprising mercury impurities is scorched. This is happening because when the mercury in the carbon (coal Hg) is burned it changes into a gas which is emitted into the atmosphere.
An atom of rubidium has 37 protons and 48 neutrons. If the atom loses one electron what will be the charge on the ion that forms?
-36
+1
36
-1
Answer:
+1
Explanation:
How is a hydrogen-1 atom different form a hydrogen-2 atom? How are they similar?
What type of radiation is carbon emitting in the following equation? 14/6C - 0/-1 + 14/7N A. alpha particles B. beta particles C. gamma rays
Answer is: B. beta particles.
Nuclear reaction: ¹⁴C → ¹⁴N + e⁻ + νe (electron antineutrino).
In beta minus decay (atomic number Z is increased by one, from 6 in carbon to 7 in nitrogen) neutron is converted to a proton and an electron and an electron antineutrino.
Beta decay is radioactive decay in which a beta ray and a neutrino are emitted from an atomic nucleus.
Magnesium has 12 protons. how many electrons are in its second energy level?
Which equation represents the reaction of acetic (ethanoic) acid with water?
CH3COO- + H2O CH3COOH + OH-
CH3COOH + H2O CH3COO- + H3O+
CH3COO- + H2O CH3COO2- + H3O+
CH3COOH + H2O CH3COOH2+ + OH-
Answer:
in shorter terms, the answer is B. CH3COOH + H2O CH3COO- + H3O+
Explanation:
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Calculate the volume, in ml. of the 1.0 m naoh stock solution needed to prepare 250 ml of 0.1 molar naoh.
Which of the following laboratory instruments can be heated up with a Bunsen burner?
Erlenmeyer flask
Graduated cylinder
Plastic pipette
Chromatography paper
Which block on the periodic table contains the actinide series of elements?
the most common source of copper (Cu) is the mineral chalcopyrite (CuFeS2). How many kilograms of chalcopyrite must be mined to obtain 475 g of pure Cu?
When hydrogens on an unsaturated fatty acid lie on the same side of the carbon-carbon double bond, a ____________ formation exists?
Molecules can be either positively or negatively charged depending upon their elemental arrangement
What element has a mass number of 16 and 8 neutrons
A 55.9 g sample of water at 99.2 °c is placed in a constant pressure calorimeter. then, 23.9 g of zinc metal at 21.1 °c is added to the water and the temperature drops to 96.9 °c. what is the specific heat capacity of the zinc metal measured in this experiment?
Heat capacity is the amount of heat required to raise the temperature of the system by 1 degree Celsius. Thus the specific heat capacity of zinc is 0.0071 calorie / (g °C).
What is Enthalpy?Enthalpy term is basically used in thermodynamics to show the overall energy that a matter have. Mathematically, Enthalpy is directly proportional to specific heat capacity of a substances.
Mathematically,
Enthalpy=mass of solution ×specific heat capacity of solution ×Change in temperature.
Heat released by the water = 55.9 g × 1 calorie/ (°C g) ×(99.2 - 96.9 )°C
Heat absorbed by the zinc metal = 23.9 g ×specific heat ×(96.9 - 21.1) °C
Heat absorbed by zinc metal = heat released by water
23.9 × Specific heat of zinc metal ×75.8 = 55.9 ×1 ×2.3
specific heat of zinc metal = 128.57 ÷1811.62 = 0.0071 calorie / (g °C)
Thus the specific heat capacity of zinc is 0.0071 calorie / (g °C)
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The _____ carries no electrical charge in the atom. electron proton gluon neutron
The answer would be neutron. This is 100% correct, because I got it right on my lesson.
The smallest unit that can exist as an element and still have the properties of that element is a(n):
A.electron
B.proton
C.neutron
D.atom
Final answer:
The correct answer "atom". The smallest unit that can maintain the properties of an element is an atom. Atoms are composed of electrons, protons, and neutrons, with the number of protons determining the element type. Atoms are the key to understanding elemental properties.
Explanation:
The smallest unit that can exist as an element and still maintain the properties of that element is a(n) atom. An atom is the foundational building block of all matter, and it retains all the characteristics of the element. By definition, atoms are composed of subatomic particles: electrons (negative charge), protons (positive charge), and neutrons (neutral). These particles are what give the atom its properties. The number of protons in an atom’s nucleus specifically determines the type of element it is.
Atoms are extremely small, typically around 100 picometers in size, and their behavior is heavily influenced by quantum mechanics. This means that classical physics, which might treat particles like billiard balls, does not accurately predict atomic behavior. Atoms are the smallest units that maintain the properties of an element, making it the correct answer (D).