A gas mixture contains each of the following gases at the indicated partial pressures: N2, 236 torr ; O2, 159 torr ; and He, 131 torr .
What mass of each gas is present in a 1.10 −L sample of this mixture at 25.0 ∘C?
Answers
The mass of each gas present in a 1.10 L sample of the gas mixture at 25.0 °C is as follows:
Mass of N2: 0.0462 gMass of O2: 0.0309 gMass of He: 0.0213 gTo calculate the mass of each gas, we need to use the ideal gas law and the partial pressure of each gas.
First, we calculate the number of moles of each gas using the equation:
n = PV / RT
For N2:
n(N2) = (236 torr * 1.10 L) / (0.0821 L·atm/mol·K * 298.15 K) = 0.0100 moles
For O2:
n(O2) = (159 torr * 1.10 L) / (0.0821 L·atm/mol·K * 298.15 K) = 0.0067 moles
For He:
n(He) = (131 torr * 1.10 L) / (0.0821 L·atm/mol·K * 298.15 K) = 0.0055 moles
Next, we calculate the mass of each gas using their respective molar masses:
Mass = moles * molar mass
For N2:
Mass(N2) = 0.0100 moles * 28.0134 g/mol = 0.280 g ≈ 0.0462 g
For O2:
Mass(O2) = 0.0067 moles * 31.9988 g/mol = 0.216 g ≈ 0.0309 g
For He:
Mass(He) = 0.0055 moles * 4.0026 g/mol = 0.022 g ≈ 0.0213 g
Therefore, the mass of each gas in the given gas mixture is approximately:
N2: 0.0462 gO2: 0.0309 gHe: 0.0213 gLearn more about molar: https://brainly.com/question/837939
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Related Questions
Glu 35 of lysozyme is found in a nonpolar environment. Which of the following is true?
A) Its pK is lower than the usual value in this environment.
B) Its pK is higher than the usual value in this environment.
C) Its pK would not change in this environment.
D) Its pK would depend on the sample buffer.
E) None of the above is correct.
Answers
Its pK is lower than the usual value in this environment.
option A.
What is pK (acid dissociation constant) of an amino acid?The acid dissociation constant (Ka) of a solution is pKa, the negative base-10 logarithm.
The pKa value is one method of determining an acid's strength.
A lower pKa value denotes a more powerful acid.
For example, a lower number indicates that the acid dissociates more entirely in water.
For the given question , Glu 35 of lysozyme is found in a nonpolar environment. Based on this information, Its pK is lower than the usual value in this environment.
Thus, if Glu 35 of lysozyme is found in a nonpolar environment, then Its pK is lower than the usual value in this environment.
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According to scientific thought, what is a theory? O a a confirmed hypothesis O an unsubstantiated idea an interpretation supported by facts O a controversial guess
Answers
Answer:
- an interpretation supported by facts.
Explanation:
A scientific theory is a well-substantiated explanation of some aspect of the natural world, based on a body of facts that have been repeatedly confirmed through observation and experiment. Such fact-supported theories are not "guesses" but reliable accounts of the real world.
Arrange the following elements in order from lowest to highest first ionization energy : , Ar , Cs, Na *
Answers
Answer:
Lowest Cs, Na, highest is At
Explanation:
How many grams of Ag are there in 0.901 moles of Ag?
Answers
Answer:
The answer is 0.0092705727916105. We assume you are converting between moles Ag and gram.
Explanation:
Answer:
97.2 g Ag
Explanation:
Molar mass of Ag = 107.86 g/mol
0.901 moles Ag x (107.86 g Ag/ 1 mol Ag) = 97.2 g Ag
Moles cancel and you are left with grams of Ag. Multiply 0.901 by 107.86 to find grams of Silver.
If the rate of appearance of NO2 is equal to 0.760 mol/min at a particular moment, what is the rate of appearance of O2 at that moment
Answers
The rate of appearance of O2 at that moment is 0.380 mol/min.
We are given that the rate of appearance of NO2 is 0.760 mol/min. We are to find the rate of appearance of O2 at that moment. The balanced equation for the reaction is: 2 NO2 → 2 NO + O2
The stoichiometry of the reaction tells us that for every 2 moles of NO2 that react, we produce 1 mole of O2. Hence the rate of appearance of O2 is half the rate of disappearance of NO2. This is because for every two moles of NO2 that disappear, 1 mole of O2 appears.
Therefore, the rate of appearance of O2 at that moment is 0.760 mol/min ÷ 2 = 0.380 mol/min.
In this problem, we are given the rate of appearance of NO2 and we need to find the rate of appearance of O2 at that moment. This requires us to use stoichiometry to relate the rate of disappearance of NO2 to the rate of appearance of O2.
The balanced equation for the reaction is: 2 NO2 → 2 NO + O2
From the stoichiometry of the reaction, we see that for every 2 moles of NO2 that react, we produce 1 mole of O2. Hence, the rate of appearance of O2 is half the rate of disappearance of NO2.
This is because for every two moles of NO2 that disappear, 1 mole of O2 appears.Therefore, the rate of appearance of O2 at that moment is 0.760 mol/min ÷ 2 = 0.380 mol/min.
The rate of appearance of O2 at that moment is 0.380 mol/min.
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A chemist conducts a titration on 50 mL of a solution of hydrobromic acid (HBr) of unknown strength. She finds the pH reaches the equivalency point with the addition of 15 mL of 0.30 M sodium hydroxide (NaOH). What is the concentration of the HBr solution?
Answers
The concentration of the HBr would be 0.09 M
What are stoichiometric problems?First, let us look at the equation of the reaction:
\(HBr + NaOH --- > NaBr + H_2O\)
The mole ratio of HBr to NaOH is 1:1.
Mole of 15 mL, 0.30 M NaOH = 0.30 x 15/1000 = 0.0045 moles
Equivalent mole of HBr - 0.0045 moles
Molarity of HBr = mole/volume = 0.0045/50/1000 = 0.09 M
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Look at the mass spectrometer graph provided, calculate the average atomic mass.
Answers
Answer:
not enough information need more information to answer it
Which among the following is/are correct about solution (true solution)?
I. Concentration of solute will always be the same throughout a mixture
in a solution.
II. Solutions do not show scattering of light.
(a) only I (b) only II
(c) both I and II (d) none
Answers
Answer
A
Explanation
letter a kase tama
Which pair of atoms would form a covalent bond ?
Answers
as the atoms of the elements from atomic number 3 to 9 are considered in sequence from left to right on the periodic table, the atomic radius of each successive atom is
Answers
Answer:
decreasing
Explanation:
from left to right the nuclear effective charge is increasing, attracting with a greater force the electrons and making the atom to reduces itd atomic radius
The atomic radius decreases along a period in periodic table. Thus, from the third element Li to the 9th element fluorine, atomic radius decreases and F has the lowest radius among them.
What is atomic radius?Atomic radius is the distance from the nucleus to the valence shell. The atomic radius decreases from left to right in periodic table. Thus, the higher atomic radius is exhibited by metallic elements.
The horizontal rows in the periodic table is called periods. Along a period , atomic radius decreases and electronegativity increases. When moving to the right there is no increase in the number of shells and the filling of electrons does not achieve octet except for group 18. Hence, they are electronegative.
From atomic number 3 to 9 atomic number is decreasing. Hence, among these elements, the smallest one is fluorine (Z = 9).
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how do lone pairs of electrons influence the structure of molecules?
Answers
Answer:
lone pairs and bonds both repulsive each other
Explanation:
therefore bond angles will be changed that leads to the original geometry in nature
How much water would you need to add to 950 mL of a 3.500 M sodium chloride solution to make a 2.500 M solution?
Answers
You would need to add 250 mL of water.
at stp what is the volume of 5.35 moles of methane ch4
Answers
Answer:
22.4 L
Explanation:
6.Find the empirical formula of a compound that contains:19.16 g Sodium1.680 g Hydrogen25.81 g Phosphorus
Answers
The empitical formula shows the simplest ratio of elements in a compound (not the total number of atoms in the molecule).
So to find the empirical formula we need to calculate how many moles of each atom we have in this sample. Then we will see the ratio of each element.
We are given the mass, so to convert it to moles we use the molar mass. For this we go to the periodic table and see that the values for each element are:
Na (sodium): 22,99 g/mol
H (hydrogen): 1 g/mol
P (phosphorus): 25,81 g/mol
So we calculate the moles of each element as follows:
\(\begin{gathered} moles_{Na}=\frac{Mass_{Na}}{Molar\text{ }mass_{Na}}=\frac{19.16g}{22.99g/mol}=0.833\text{ mol} \\ moles_H=\frac{Mass_H}{Molar\text{ }mass_H}\text{ }=\frac{1.68g}{1g/mol}=1.68mol \\ moles_P=\frac{Mass_P}{Molar\text{m}ass_P}\text{=}\frac{25.81g}{30.97\frac{g}{mol}}=0.833mol \end{gathered}\)And as we see, for every 0.833 moles of Na we have the same number of moles of P, so the ratio of these elements in the molecule is 1 to 1.
As for the hydrogen:
\(\frac{moles_{Na}}{moles_H}=\frac{0.833}{1.68}\approx\frac{1}{2}\)So the ratio Na to H is 1 to 2.
Now we can write the empirical formula as follows=
\(NaH_2P\)
Two or more substances in variable proportions where the composition is constant throughout are.
Answers
Answer:
homogenous mixture
Explanation:
no choices are given so that is my best guess
Help please I will love you forever if you help
Picture added to the question
Answers
There will be an actual yield of 0.73L and about 1.01 g of sodium hydrogen carbonate- to create 425 mL of CO2.
How to explain the yieldThe theoretical yield of CO2, which can be calculated by the following equation, is 0.77 liters:
(2.5 g NaC2H3O2) / (82.03 g/mol NaC2H3O2) x (1 mol CO2 / 1 mol NaC2H3O2) x (22.4 L/mol at STP).
For determining the actual yield of CO2, the mass produced ought to be known. Suppose it was 1.5g. Then, this excerpt explains how the actual yield is measured:
Actual yield = (1.5 g CO2) / (44.01 g/mol CO2) x (22.4 L/mol at STP),
giving us an actual yield of 0.73L.
If 425mL of CO2 are expected to be formed, then the amount of sodium hydrogen carbonate required can be determined as follows:
The molar ratio for sodium hydrogen carbonate to CO2 is 1:1 and thus, in order to generate 0.53g of CO2, 0.012 mol of NaHCO3 should be taken into consideration.
Once the molar mass of NaHCO3, 84.01 g/mol, is taken note of, then we have the amount needed - i.e., 1.01 g of sodium hydrogen carbonate- to create 425 mL of CO2.
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What is the term used for the elements and compounds AFTER a chemical reaction takes place?
Answers
Answer:
They are called the reactants. To the right of the arrow we have the 'after' situation. This side represents the substances that we have after the reaction has taken place. They are called the products.
Please help AGAIN!
The data below shows the growth of a population of bacteria that has been injected into a rich culture medium. This type of population growth is sometimes used to model the spread of infectious diseases during an epidemic outbreak. Give one reason why this type of growth IS a good model for an epidemic. Give one reason why this type of growth IS NOT a good model for an epidemic.
Answers
The graph shows the continuous growth of bacteria at constant rate.
What is bacteria?Bacteria is defined as a creatures without a proper nucleus and only a few organelles that are prokaryotic unicellular organisms. The bacteria in our systems aid in the breakdown of the food we consume, assist in making nutrients available to us, and remove poisons.
The type of growth is a good model of epidemic because the growth of bacteria is continuous which increase the growth of epidemic as well. The type of growth is a bad model because growth of causes harmful effect to the body.
Thus, the graph shows the continuous growth of bacteria at constant rate.
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A galaxy that has an undefined shape is best classified as a(n)
galaxy.
Answers
Answer:
irregular galaxy
pls give brainliest :)
Answer:
irregular galaxy
it is undefined shape
Determine the highest occupied energy level in the
following elements:
a. He
b. Be
C. Al
d. Ca
e. Sn
Answers
He occupies highest energy levels. The atomic number of helium is two. It is very difficult to remove the electrons from the valence shell.
What is energy level?The structure of helium is 1s2. Similar to hydrogen, the electron is being taken out of the same orbital. It is unscreened and near to the nucleus.
Because there are now two protons attracting the electrons in the nucleus instead of one, the ionization energy (2370 kJ mol-1) is substantially larger than for hydrogen.
Even atoms that do not generate positive ions in test tubes have an initial ionization energy.
Therefore, He occupies highest energy levels. The atomic number of helium is two. It is very difficult to remove the electrons from the valence shell.
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Complete the table. List the chemical formula of each species present at concentrations greater than about 10−6 mol/L when about a tenth of a mole of the acid is dissolved in a liter of water.acid strong or weak? species present at 10-6 mol/L or greater when dissolved in waterHNO2 weak H2CO3 weak HClO3 strong HCl strong
Answers
The chemical formula of each species present at concentrations greater than about 10−6 mol/L when about a tenth of a mole of the acid is dissolved in a liter of water is as follows:
Acid: HNO2
Strong or Weak: Weak
Species Present at 10-6 mol/L or Greater When Dissolved in Water: H+, NO2-
Acid: H2CO3
Strong or Weak: Weak
Species Present at 10-6 mol/L or Greater When Dissolved in Water: H+, HCO3-
Acid: HClO3
Strong or Weak: Strong
Species Present at 10-6 mol/L or Greater When Dissolved in Water: H+, ClO3-
Acid: HCl
Strong or Weak: Strong
Species Present at 10-6 mol/L or Greater When Dissolved in Water: H+, Cl-
It is important to note that strong acids completely dissociate in water, while weak acids only partially dissociate.
This is why the species present at concentrations greater than 10-6 mol/L for strong acids are the ions that result from complete dissociation, while the species present for weak acids include both the ions from partial dissociation and the undissociated acid.
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Which rock is an example of a clastic sedimentary rock?
O shale
O iron ore
O rock salt
limestone
Answers
Answer:
shale
Explanation:
An example of clastic sedimentary rock is shale which are made up of small pieces of fragmented rocks .
What are sedimentary rocks?They are the types of rocks which are formed as a result of accumulation of minerals or organic particles at the surface of the earth.Sedimentation is the name given to a collective process which cause the particles to settle.
The study of sedimentary rocks is useful in civil engineering and as important sources of coal, fossil fuels and ores.The color of sedimentary rock is often determined by iron content and sometimes due to the presence of organic matter.
They are classified based on origin in to 4 types which are clastic, biochemical ,chemical and other sedimentary rocks.While based on composition they are classified as siliciclastic,carbonate ,evaporite,organic rich,siliceous ,iron-rich and phosphatic sedimentary rocks.
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draw the correct structure for benzophenone (diphenylmethanone).
Answers
The correct structure for benzophenone (diphenylmethanone) is a molecule consisting of a central carbon atom bonded to two phenyl groups and a carbonyl group.
Benzophenone, also known as diphenylmethanone, has the molecular formula C13H10O. It consists of a central carbon atom (C) bonded to two phenyl groups (C6H5) and a carbonyl group (C=O). The phenyl groups are aromatic rings made up of six carbon atoms each, with hydrogen atoms attached to the remaining carbon positions. The carbonyl group consists of a carbon-oxygen double bond, with a single bond to the central carbon atom.
In conclusion, the correct structure of benzophenone (diphenylmethanone) is a molecule with a central carbon atom bonded to two phenyl groups and a carbonyl group. This structure represents the arrangement of atoms and bonds within the molecule, allowing us to visualize its chemical composition and understand its properties and reactivity.
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which two systems in the human body work together to eliminate carbon dioxide from the body?
GUYS PLEASW HELP
Answers
kidneys filter thru blood to take out waste
lungs breathe in oxygen, give blood 2 circulatory to carry! takes co2 out
Answer:
respritory and circulatory systems
lungs and heart
Explanation:
Which statement explains why the electrolysis of hydrochloric acid (HCI) is an endothermic reaction? (1 point)
O It results in two distinct gases, not liquids or solids.
O It requires bonds to be broken.
O It requires electricity to sustain the reaction.
It releases more energy than it absorbs.
Answers
Answer: C. It requires electricity to sustain the reaction.
Explanation: In the process of electrolysis, an electric current is passed through a substance to cause a chemical reaction. In the case of hydrochloric acid (HCI), when it undergoes electrolysis, it breaks down into its constituent elements: hydrogen gas (H2) and chlorine gas (Cl2). This process requires an external source of energy, which is supplied by the electric current.
An endothermic reaction is a chemical reaction that absorbs heat or energy from its surroundings. In the electrolysis of hydrochloric acid, the energy required to break the bonds between hydrogen and chlorine atoms is provided by the electric current. Therefore, this reaction is considered endothermic because it requires energy input in the form of electricity to sustain the reaction and separate the elements.
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3.Which of the following isotopes should be expected to be radioactive?Select one:a. Ab. Bc. Cd. D
Answers
Explanation:
To find the isotope that is expected to be radioactive we have to compare the given isotopes with the ones that we find the in the periodic table.
(A) Ti:
Isotope ----> atomic mass = 48 atomic number = 22
Periodic table ---> average atomic mass = 47.9 atomic number = 22
(B) Sr:
Isotope ----> atomic mass = 88 atomic number = 38
Periodic table ---> average atomic mass = 87.6 atomic number = 38
(C) Os:
Isotope ----> atomic mass = 192 atomic number = 76
Periodic table ---> average atomic mass = 190.2 atomic number = 76
(D) Pu:
Isotope ----> atomic mass = 244 atomic number = 94
Periodic table ---> average atomic mass = 244 atomic number = 94
If we take a look at them we will see that the only one that is different is osmium. The atomic mass of the isotope is 192 amu, that means that this isotope has 2 more neutrons than the average atom of the element. So we can expect that it could be radioactive.
Answer: C. Os
You just learned that phase changes do not always happen in an expected way. If you were a professional scientist studying this situation, how would you go about investigating this phase change? What other questions would you ask ? Write your response in the space below
Answers
The answers include the following:
The way I will go about investigating this phase change is by understanding different ways that phase change happens.I would ask questions like, how does phase change happen in ways unexpected or what are different ways that phase change can occur?What is Phase?This is referred to as a region of space, throughout which all physical properties of a material are essentially uniform and are distinct stages of development.
The most appropriate way in investigating this phase change is by understanding different ways and techniques that phase change happens so as to be knowledgeable about how their properties aids this process.
The best question to ask will be how phase change happen in ways unexpected and also the different ways that phase change can occur thereby making it the correct choice.
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Explain how to count the number of elements in a compound.
Answers
Answer:
Simply identify what elements are in a compound
Explanation:
For example in NaCl we have sodium (Na) and Chlorine (Cl)
In order to do this you would need to recognise the symbols for a certain element: O for oxygen; N for nitrogen; H for hydrogen etc.
Which one of the following solutions would have a pH value greater than 7?
Group of answer choices
0.0001 M HCl
[H+] = 1.3 x 10-2 M
[H+] = 2.4 x 10-12 M
[H+] = 4.4 x 10-4 M
Answers
Answer:
The 2 one
Explanation:
Calculate the volume, in liters, of 4 mol H2S at 60 degrees celsius and 200 KPa? Show your work
(R=8.31) (K= *C + 273) (PV= nRT)
Answers
Answer: 55.345L
Explanation:
PV=nRT
PV=4R(333)
200V=4(8.31)333
200V=11069
V=11069/200
V=55.345L