When a gas is subjected to different pressure conditions and the volume changes, we use Boyle's Law, which states that the pressure of a gas is inversely proportional to its volume, provided the temperature remains constant. The volume of gas when the pressure is 1140 mmHg is 2.05 L, approximately.
Given the initial volume of gas as 3.5 L and the initial pressure as 760 mmHg, we are to find the volume of gas when the pressure is 1140 mmHg. To solve the problem, we can use Boyle's Law, which states that the pressure of a gas is inversely proportional to its volume, provided the temperature remains constant. The mathematical representation of Boyle's Law is P1V1 = P2V2, where P1 and V1 are the initial pressure and volume, respectively, and P2 and V2 are the final pressure and volume, respectively. The equation can be rearranged as V2 = (P1V1)/P2 to solve for the final volume of gas, V2.Substituting the given values in the formula, we have V2 = (760 mmHg x 3.5 L)/1140 mmHgV2 = 2344/1140V2 = 2.05 L Therefore, the volume of gas when the pressure is 1140 mmHg is 2.05 L, approximately.
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Ionic compounds tend to be ...
A. Hard
B. Soft
C. Bendable
Answer:
A
Explanation:
Answer:
A. Hard
Explanation: got it correct on Edg
What are the 3 steps to balancing a chemical equation?
First, count the atoms on each side. Next, change the coefficient of one of the compounds. Once the equation is balanced, repeat steps two and three one more time while counting the atoms.
It is important to deduce the unbalanced equation from the reactant and product chemical formulas (if it is not already provided). It is necessary to compare the total number of atoms of each element on the reactant side and the product side. Stoichiometric considerations are now taken into account for molecules made up of an element that has a distinct number of atoms on both the reactant and product sides. The coefficient must balance the amount of atoms on either side. To calculate the number of atoms in one species, keep in mind that the stoichiometric coefficient must be multiplied by the total number of atoms of an element present in 1 molecule of the species.
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A cylinder contains 239 L of hydrogen gas (H_2) at 0.0°C and a pressure of 10.0 atm. How much energy is required to raise the temperature of this gas to 30.5°C? Universal gas constant is 8.314 J/(mol·K). For H_2 ,C_v = 20.4 J/(mol·K).
573,213 Joules of energy is required to raise the temperature of the hydrogen gas from 0.0°C to 30.5°C.
To calculate the energy required to raise the temperature of the hydrogen gas, we can use the equation:
ΔE = n * Cv * ΔT
where:
ΔE is the change in energy,
n is the number of moles of gas,
Cv is the molar heat capacity at constant volume,
ΔT is the change in temperature.
First, we need to calculate the number of moles of hydrogen gas using the ideal gas law:
PV = nRT
where:
P is the pressure,
V is the volume,
n is the number of moles,
R is the ideal gas constant,
T is the temperature.
Rearranging the equation, we have:
n = PV / RT
Given:
P = 10.0 atm
V = 239 L
R = 8.314 J/(mol·K)
T1 = 0.0°C = 273.15 K (convert to Kelvin)
T2 = 30.5°C = 303.65 K (convert to Kelvin)
Cv = 20.4 J/(mol·K)
Now, let's calculate the number of moles of hydrogen gas:
n = (10.0 atm * 239 L) / (8.314 J/(mol·K) * 273.15 K)
n ≈ 92.05 moles
Next, we can calculate the change in energy using the equation mentioned earlier:
ΔE = n * Cv * ΔT
ΔE = 92.05 moles * 20.4 J/(mol·K) * (303.65 K - 273.15 K)
Calculating this expression will give us the energy required to raise the temperature of the hydrogen gas.
ΔE ≈ 573,213 J
Therefore, approximately 573,213 Joules of energy is required to raise the temperature of the hydrogen gas from 0.0°C to 30.5°C.
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In a common bipedal primate, whose body temperature is 38oC, the ionic concentrations inside
and outside a typical nerve cell are shown below
Ion Inside Outside
Na+ 10 mM, 150 mM
K+ 112 mM, 3 mM
Cl- 4 mM, 88 mM
a) Calculate the equilibrium potentials for Na+, K+, and Cl-
The equilibrium potentials for Na⁺ = +71.7 mV , K⁺ = -95.9 mV and for Cl⁻ = -81.9 mV in a common bipedal primate, whose body temperature is 38°C .
a)
ENa = 61 [log (150/10)] mV
= 61 X (1.176) mV
= +71.7 mV
EK = 61 [log (3/112)] mV
= 61 X (-1.572) mV
= -95.9 mV
ECl = -61 X log([Cl-]out/[Cl-]in)
= -61 X (1.342)
= -81.9 mV.
b) Action potential depolarizations approach ENa but rarely reach it. As a result, Vm may become inside-positive up to +71.7 mV during an action, but no higher.
[ Since most action potentials end too quickly for the membrane to become this positive, the transmembrane potential is likely to be slightly less positive than this at the action potential peak.]
Potential depolarization :When an internal change alters the distribution of electric charges within a cell, depolarization occurs, leaving the cell with a lower negative charge than the outside. Depolarization is necessary for many cell functions, cell-to-cell communication, and an organism's overall physiology.
Incomplete question :
In a common bipedal primate, whose body temperature is 38oC, the ionic concentrations inside and outside a typical nerve cell are shown below Ion Inside Outside
Na+ 10 mM, 150 mM
K+ 112 mM, 3 mM
Cl- 4 mM, 88 mM
a) Calculate the equilibrium potentials for Na+, K+, and Cl-.
b) What is the most positive voltage to which an action potential could go in this organism?
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. Fire can be extinguished by: - a. Lowering temperature below ignition temperature b. Cutting the supply of oxygen c. Removing non-combustible substances from surroundings d. Both a & b
Answer:
B. Cutting the supplies of oxygen
The most common isotope of chromium is 52Cr. How many neutrons does an atom of 52Cr have?
a. 24
b. 28
c. 52
d. 80
Calculate the density of an object, if the object has a mass of 30 grams and the volume is 10.0 ml.
Answer:
3.0grams/ml
density is a ratio of mass to volume
that implies 30grams/10ml
you can get a different answer depending on the unit
The student then takes a 1. 00 M stock solution of table sugar (sucrose, C12H22O11) and mixes 0. 305 L of stock solution with additional distilled water to create a dilute solution with a total volume of 1. 25 L.
• Explain how the student can determine the molarity of the resulting solution. Show a valid calculation for the final molarity
The final molarity of the resulting solution is approximately 0.244 M.
To determine the molarity of the resulting solution, the student can use the formula:
M₁V₁ = M₂V₂
Where:
M₁ = initial molarity of the stock solution
V₁ = initial volume of the stock solution
M₂ = final molarity of the resulting solution
V₂ = final volume of the resulting solution
In this case:
M₁ = 1.00 M (stock solution molarity)
V₁ = 0.305 L (initial volume of the stock solution)
V₂ = 1.25 L (final volume of the resulting solution)
The student needs to solve for M₂, the final molarity of the resulting solution.
M₁V₁ = M₂V₂
(1.00 M)(0.305 L) = M₂(1.25 L)
M₂ = (1.00 M)(0.305 L) / (1.25 L)
M₂ ≈ 0.244 M
Therefore, the final molarity = 0.244 M.
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A chemist needs to neutralize 349 L of HF solution that has a molarity of 3.6 M. She currently has an NaOH solution with a
molarity of 5.4 M. How many liters of her NaOH solution would she need to neutralize the HF?
The chemical equation for this reaction is HF + NaOH → NaF + H₂O
Enter a number with units.
The volume (in L) of 5.4 M NaOH solution needed to neutralize the HF solution is 232.67 L
How do i determine the volume of NaOH needed?The volume of NaOH needed can be obtained as illustrated below:
HF + NaOH → NaF + H₂O
The mole ratio of the acid, HF (nA) = 1The mole ratio of the base, NaOH (nB) = 1Volume of acid, HF (Va) = 349 L Molarity of acid, HF (Ma) = 3.6 MMolarity of base, NaOH (Mb) = 5.4 MVolume of base, NaOH (Vb) =?MaVa / MbVb = nA / nB
(3.6 × 349) / (5.4 × Vb) = 1
1256.4 / (5.4 × Vb) = 1
Cross multiply
1 × 5.4 × Vb = 1256.4
5.4 × Vb = 1256.4
Divide both side by 0.2
Vb = 1256.4 / 5.4
Vb = 232.67 L
Thus, we can conclude that the volume of NaOH needed is 232.67 L
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If the sun output of solar radiation increased by 20% how would this impact the temperature of earth's mantle
Answer:
The temperature will not be affected directly
Explanation:
The solar radiation has a direct effect on the outer surface and inner part of the earth but an increase by 20% of the solar radiation will not cause the temperature of the Earth's mantle to increase because the factors that heat up the Earth's mantle are : Friction between core materials that sink into the center of the planet and Heat from decay of radioactive materials
What is the concentration of lead ions and chromate ions in a saturated lead chromate solution at 25°C? (K sp =1.8*10^ -14 ).
Answer: What is the Concentration of Lead Ions and Chromate Ions in a Saturated Lead Chromate Solution at 25°C? (K sp =1.8*10^ -14 ).
Explanation:
The solubility product expression for lead chromate is:
PbCrO4 (s) ⇌ Pb2+ (aq) + CrO42- (aq)
Ksp = [Pb2+][CrO42-]
At equilibrium, the concentration of Pb2+ and CrO42- in a saturated solution of PbCrO4 will be equal to x mol/L. Substituting these values in the Ksp expression and solving for x gives:
Ksp = x^2
x = sqrt(Ksp) = sqrt(1.8 x 10^-14) = 1.34 x 10^-7 M
Therefore, the concentration of lead ions and chromate ions in a saturated lead chromate solution at 25°C is 1.34 x 10^-7 M.
{I Hope This Helps! :)}
which are the four quantum numbers of the last potassium layer?
Which bond is the source of a large amount of energy in reactions involving atp?
The high-energy phosphate bond within ATP is the source of a large amount of energy in reactions involving ATP.
The bond that is the source of a large amount of energy in reactions involving ATP is the high-energy phosphate bond. ATP, or adenosine triphosphate, is a molecule that stores and transfers energy within cells. It consists of three phosphate groups attached to an adenosine molecule. The bond between the second and third phosphate groups is a high-energy bond that can be easily broken, releasing energy.
When a cell needs energy, the ATP molecule undergoes hydrolysis, which is the process of breaking the high-energy phosphate bond. This reaction converts ATP into ADP (adenosine diphosphate) and inorganic phosphate (Pi). The release of one phosphate group results in the formation of ADP, releasing a significant amount of energy that can be used by the cell for various metabolic processes.
The hydrolysis of ATP is an exothermic reaction, meaning it releases energy. This energy is utilized by cells for various activities like muscle contraction, active transport, synthesis of macromolecules, and nerve impulse transmission. ATP acts as the energy currency of the cell, continuously being synthesized and hydrolyzed to provide the necessary energy for cellular functions.
In summary, the high-energy phosphate bond within ATP is the source of a large amount of energy in reactions involving ATP.
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2. A gas container is initially at 40 mm Hg and 77K (liquid nitrogentemperature.) What will the pressure be when the container warmsup to room temperature of 298K?
ANSWER
The final pressure of the gas is 155mmHg
EXPLANATION
Given that:
The initial pressure of the gas is 40mmHg
The initial temperature of the gas is 77K
The final temperature of the gas is 298K
To find the final pressure, follow the steps below
In the given data, the volume of the container is fixed. Hence, the process is an Isochoric.
Step1: Write the gas law at constant volume
\(\frac{P1}{T1}=\frac{P2}{T2}\)Step 2: Substitute the given data into the formula in step 1 to find P2
\(\begin{gathered} \frac{40}{77}=\frac{P2}{298} \\ \text{ Cross multiply} \\ \text{ 40}\times\text{ 298 }=\text{ 77}\times P2 \\ 11920\text{ }=\text{ 77}\times\text{ P2} \\ \text{ Divide both sides by P2} \\ \text{ P2 }=\frac{11920}{77} \\ P2\text{ }=154.8mmHg \\ P2\approx155mmHg \end{gathered}\)Hence, the final pressure of the gas is 155mmHg
10) Some steakhouses offer a 72-oz steak for free if you can eat it. How many pounds of meat would you
have to swallow for a free dinner?
Answer:
4.5 lb (pounds)
Explanation:
IF YOU CONVERT OUNCES TO POUNDS 72 OZ IS EQUAL TO 4.5 POUNDS
can someone help me plz
Answer:
what do you need help with?
Explanation:
Answer:
Hello brainly user! You did not provide a question for us to help you with! In order for someone to help you, you need to provide the question you are in need of help for. What's your question?
49. Identify the noble gas that has atoms in the ground state with the same electron configuration as the nitrogen in a molecule of isocyanic acid
Answer:
Neon (Ne)
Explanation:
Nitrogen in it's neutral state has valency of 5 and it's electronic configuration is given as;
1s2 2s2 2p3
However in isocyanic acid, it forms a covalent bond with hydrogen and carbon. Due to this bond, it is able to achieve stable octet configuration. The configuration is given as;
1s2 2s2 2p6
This is the same electronic configuration as Neon
How many moles are in 1.204x10^24 atoms of a gas?
Please help!
1.999 mol gas
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightChemistry
Atomic Structure
Using Dimensional AnalysisAvogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.Explanation:Step 1: Define
1.204 × 10²⁴ atoms gas
Step 2: Identify Conversions
Avogadro's Number
Step 3: Convert
Set up: \(\displaystyle 1.204 \cdot 10^{24} \ atoms \ gas(\frac{1 \ mol \ gas}{6.022 \cdot 10^{23} \ atoms \ gas})\)Multiply/Divide: \(\displaystyle 1.99934 \ moles \ gas\)Step 4: Check
Follow sig fig rules and round. We are given 4 sig figs.
1.99934 mol gas ≈ 1.999 mol gas
A sample of gas has a volume of 215 cm3 at 23.5 °C and 3 atm. What will the volume of the gas be at STP
Answer:
165.3 cm^3
Explanation: hope this is correct!!
P1 * V1 / T1 = P2 * V2 / T2
P1 = 84.6 kPa
V1 = 215 cm³
T1 = 23.5°C = 23.5 + 273 K = 296.5 K
At STP:
P2 = 101.3 kPa
V2 = ?
T2 = 273 K
Chlorine–35 has 17 protons. How many protons and neutrons does the isotope chlorine–36 have? 19 protons and 17 neutrons 17 protons and 18 neutrons 17 protons and 19 neutrons 18 protons and 17 neutrons
Answer:
17 protons
19 neutrons
Explanation:
Chlorine will always have the same amount of protons, and that would be 17 protons.
The atomic mass will change according to how many neutrons are present.
Cl - 35 is comprised of 17 protons and 18 neutrons.
We want to find Cl - 36:
We simply add 1 neutron. 18 + 1 = 19 neutrons.
a sample of water, h2o, has a mass of 24.50 g. calculate the number of water molecules in the sample.
Therefore, the number of water molecules in the given sample is approximately \(8.18 * 10^2^3\) molecules.
What is Avogadro's number?To calculate the number of water molecules in the given sample, we need to use the concept of Avogadro's number and the molecular weight of water.
The molecular weight of water (H2O) is:
H = 1.008 u (atomic mass units)
O = 15.999 u (atomic mass units)
Molecular weight of H2O = (2 x 1.008 u) + 15.999 u = 18.015 u
Using the molecular weight of water, we can calculate the number of moles of water in the sample:
Number of moles = mass / molecular weight
Number of moles = 24.50 g / 18.015 g/mol
Number of moles = 1.359 mol
Now, using Avogadro's number (\(6.022 *10^2^3\) molecules/mol), we can calculate the number of water molecules in the sample:
Number of water molecules = Number of moles x Avogadro's number
Number of water molecules = \(1.359 mol * 6.022 *10^2^3\) molecules/mol
Number of water molecules =\(8.18 * 10^2^3\)molecules
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does carbon dissolve in water
Answer:
yes
Explanation:
CO2 is soluble because water molecules are attracted to these polar areas. The bond between carbon
How does an emerging idea differ from scientific consensus? Which best describes emerging scientific ideas?
Emerging scientific ideas are new theories or ideas that are gaining attention in the scientific community, but have not yet been fully accepted or confirmed.
Emerging ideas refer to the new and innovative ideas or theories that have yet to gain full scientific acceptance. While a scientific consensus is a view or theory that has been universally accepted and confirmed by multiple experiments or research, an emerging scientific idea is a new and unproven theory or idea that is gaining attention in the scientific community. These emerging ideas may also be referred to as scientific hypotheses. In contrast to scientific consensus, emerging scientific ideas have not yet been subjected to rigorous testing and confirmation.
They are generally proposed to explain new observations or experimental results, which have not yet been fully understood or explained by established scientific theories. Emerging scientific ideas can have the potential to challenge the current scientific consensus. If an emerging scientific idea is found to be valid, it can ultimately lead to the establishment of a new scientific consensus. For example, the emerging scientific idea of the Higgs boson particle led to the discovery of a new field in particle physics, which is now an established scientific consensus.
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Which property could allow a student to easily separate sand and iron filings? (1 point,
O melting point
Omagnetism
Oboiling point
Osolubility
Magnetic separation is a method that uses magnetic force to remove the magnetically sensitive material from a mixture. Because iron is attracted by magnets, this is the ideal method for separating sand and iron fillings.
Magnetism was the physical attribute that allowed this combination to be separated. I used the magnet to separate the iron filing from the sand in the mixture. The magnet attracted the iron filings but not the sand. We were able to separate the iron filings from the sand as a result of this.
Because iron is magnetic while the other two are not, a magnet may be used to pull the iron filings out of the mixture while leaving the salt and sand. Sand is not water-soluble, although salt is. This implies they may be combined in water and swirled together. The salt dissolves, but the sand does not.
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someone help plz!
what is a Hydrogel?
Answer:
Hydrogels can be defined as systems comprising of three-dimensional, physically or chemically bonded polymer networks entrapping water in intermolecular space.
Explanation:
If the average penny is 2mm thick how far toward the sun would a 1 mole stack of pennies reach
Answer: why would u need the answer for that question
Explanation: Height of penny: .2 mm
Distance from earth to sun: 1.5 x 10^17 millimeters.
2mm x 6.022x10^24= 1.2044x10^24 millimeters(1.2044 x 10^24) / (1.5 x 10^14)
= 8 029 3333.3 times to the sun
80329333.3 / 2= 4 014 6666.5 times to the sun from earth and back
Final Answer: 4,014,6666.5
One mole of any substance contains 6.022 × 10²³ atoms or particles. If we stalk one mole of pennies it would heigh 6.022 × 10²³ mm. Thus for one penny of 2 mm thick the distance of sun from the stalk will be 1.204 × 10¹⁸ km.
What is one mole?A substance containing 6.022 × 10²³ atoms is called one mole of that substance. This number 6.022 × 10²³ is a called Avogadro number.
One mole of every element thus have 6.022 × 10²³ atoms. Similarly one mole of every compounds contains 6.022 × 10²³ molecules.
Now one mole of pennies contains 6.022 × 10²³ equivalent pennies. If one pennie have a thickness of 2mm, 6.022 × 10²³ pennies have a thickness of 2 × 6.022 × 10²³ = 1.204 × 10²³ mm.
1 mm = 10⁻⁶ km.
Thus, 1.204× 10²³ mm = 1.204 × 10²³ × 10⁻⁶ km
= 1.204 × 10¹⁸ km.
Therefore, if one mole of pennies each of 2 mm thick is stalked it will be 1.204 × 10¹⁸ km far from the sun.
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2. write a conclusion statement that will address the following:
write in complete sentences.
is your hypothesis supported or not? explain using your data/calculations for support.
the accuracy & precision of your data.
possible further experimentation.
possible sources of error
.
(the hypothesis is : if the density of the object is 19.32 g/ml then the object is gold)
Based on the data and calculations obtained, it can be concluded that the hypothesis stating, "If the density of the object is 19.32 g/ml, then the object is gold" is not supported.
To support this conclusion, the data and calculations regarding the density of the object should be analyzed. If the calculated density of the object differs significantly from the expected value of 19.32 g/ml, it indicates that the object is not gold.
The accuracy and precision of the data can be assessed by comparing the calculated density with the expected density value. If the calculated density is close to the expected value, it suggests high accuracy. Additionally, if multiple measurements of density yield consistent results, it indicates high precision.
Further experimentation could involve additional tests to determine the identity of the object. These tests could include assessing other physical or chemical properties such as melting point, electrical conductivity, or reactivity with certain substances.
Possible sources of error in the experiment could include instrumental errors in measuring the mass or volume of the object, contamination of the object, or inaccuracies in the known density of gold used for comparison. These factors could contribute to deviations between the calculated and expected densities.
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how can we separate the mixture of water and sugar.how?explain
Which of the following measurements has three significant figures?
A. 5100 m
B. 0.005 m
C. 0.510
D. 0.051
The correct answer is C: 0.510 m
N I C E - D A Y!
Answer:
C
Explanation:
a) has 2 sig. figures
b) has 1 sig. figures
c) has 3 sig. figures
d) has 2 sig. figures
formula for lead(III) sulfite?
Answer:
PBSO4
FOrmula of lead(III) sulfite
PBSO4