What is the mass in grams of 5. 90 mol CH4?
A.
94. 7 g
B.
0. 272 g
C.
0. 368 g
D.
695 g
E.
596 g
Answers
Given, the number of moles of CH4 = 5.90 mol To find: The mass of CH4 in grams. The molar mass of CH4 is as follows
Hence, the correct option is (A) 94.7 g.
C = 12.01 g/mol, H = 1.01 g/mol. Molar mass of CH4 = 12.01 + (4 × 1.01) g/mol= 16.05 g/mol Now, we can find the mass of CH4 as follows
Mass = number of moles × molar mass of CH4= 5.90 mol × 16.05 g/ mol = 94.7 g Therefore, the mass in grams of 5.90 mol CH4 is 94.7 g. Hence, the correct option is (A) 94.7 g.
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Related Questions
Temperature (average kinetic energy) affects the density of a substance.
True
False
Answers
Answer:
True
Explanation:
Higher temperature will have greater volumes so the density will be less.
Balance the following equation
H2SO4 + Ca(OH)2 --> CaSO4 + H20
PLEASE HELP
Answers
Answer:
H2SO4 + Ca(OH)2 --> CaSO4 + 2H2O
A gas sample was produced in the laboratory. The gas was determined to be more dense than air (which is mostly composed of nitrogen). What is the identification of the gas? a)Hydrogen b)Neon c)Methane (CH_4) d)Carbon Dioxide
Answers
The correct option is (d) Carbon Dioxide.
Explanation:
The density of air is around 1.2 g/L, which means that any gas with a density above this value is more dense than air.
Carbon dioxide has a density of approximately 1.98 g/L, which is considerably more dense than air (composed of nitrogen and oxygen).
As a result, if a gas sample is determined to be more dense than air, it is likely to be carbon dioxide (CO2), which has a molecular weight of 44 g/mol.
Carbon dioxide is produced in the laboratory by many chemical reactions and is commonly employed in the food and beverage industries, such as carbonating soda and beer.
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During the apollo missions,an astronaut took a golf ball to the moon. He placed it on the moon’s surface and hit the ball with a golf club. Which property of the golf ball was different on the moon than on earth?
A.) density
B.) mass
C.) volume
D.) weight
Answers
Answer:
b.)
Explanation:
Because you would have a different weight on the moon because of it's low gravity
the ability for bonds to take on an intermediate character in which the electrons are able to occupy different regions of a molecule at the same time is called hybridization. true false
Answers
True. The ability for bonds to take on an intermediate character in which the electrons are able to occupy different regions of a molecule at the same time is called hybridization.
What is hybridization ?When two atomic orbitals join to generate a hybrid orbital in a molecule, the energy of the individual atoms' orbitals is redistributed to give orbitals of equivalent energy. We refer to this process as hybridization. Hybridization occurs when the atomic orbitals of an atom are mixed together to form new, hybrid orbitals. These hybrid orbitals have properties that are intermediate between those of the original atomic orbitals, and they are able to bond with other atoms in different ways. Hybridization is important in the formation of chemical bonds and in the determination of the shape and properties of molecules.Hybridization is often used to explain the behavior of atoms in molecules, particularly when the bonding patterns and shapes of the molecules do not conform to the predictions of simple valence bond theory.To learn more about hybridization refer:
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Construct two possible hypothetical paths for the calculation of enthalpy change of the following process. Without calculation, write all the steps and equations that should be used for the calculations procedure.
o-xylene (s, 20°C, 3 atm) o-xylene (v, 20°C, 2 atm)
Answers
Two possible hypothetical paths for the calculation of the enthalpy change for the given process are: (1) using Hess's law and (2) utilizing the standard enthalpy of formation.
First, calculate the enthalpy change for the conversion of solid o-xylene (s) to gaseous o-xylene (g) at the same temperature and pressure. This can be achieved by subtracting the enthalpy of vaporization (∆Hvap) from the enthalpy of fusion (∆Hfus) of o-xylene. Then, determine the enthalpy change for the change in pressure from 3 atm to 2 atm, assuming ideal gas behavior. Finally, sum up the enthalpy changes from the two steps to obtain the total enthalpy change for the process.
Start by determining the standard enthalpy of formation (∆Hf°) of solid o-xylene and gaseous o-xylene at the same temperature and pressure. Then, subtract the standard enthalpy of formation of the reactants from the standard enthalpy of formation of the products. The resulting value represents the enthalpy change for the given process under standard conditions.
It is important to note that the specific values for enthalpy changes, enthalpy of vaporization, enthalpy of fusion, and standard enthalpy of formation are not provided in the given question and would need to be obtained from reliable sources or experimental data for accurate calculations.
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Where would (aq) (s) go in Cr(NO3)3+K3PO4
Answers
Answer:
Cr(NO3)3 (aq) +K3PO4 (s)
Explanation:
What is the molality of a CaCl2 solution that contains 166.5 g CaCl2 and is dissolved in 3.5kg of water? 0.429 molal 47.6 molal 5.25 molal 1.50 molal
Answers
The molality of the CaCl₂ solution given that 166.5 g of CaCl₂ dissolves in 3.5 Kg of water is 0.429 M
What is molality?This is the defines as the mole of solute per unit mass (in Kilogram) of water.
Molality = mole / mass of water (in Kg)
How to determine the mole of CaCl₂The mole of 166.5 g of CaCl₂ can be obtained as illustrated below:
Mass of CaCl₂ = 166.5 gMolar mass of CaCl₂ = 40 + (35.5×2) = 111 g/moleMole of CaCl₂ = ?Mole = mass / molar mass
Mole of CaCl₂ = 166.5 / 111
Mole of CaCl₂ = 1.5 moles
How to determine molality of the solutionThe molality of the CaCl₂ solution can be obtained as illustrated below:
Mole of CaCl₂ = 1.5 molesMass of water = 3.5 KgMolality of CaCl₂ = ?Molality = mole / mass of water (in Kg)
Molality of CaCl₂ = 1.5 / 3.5
Molality of CaCl₂ = 0.429 M
Thus, the molality of the solution is 0.429 M
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if you dissolve 93.1g of k2CO3(s) (molar mass=136.21 g/mol) in enough water to produce a solution with a volume of 1.09 L. what is the molarity
Answers
Answer: The molarity of the K2CO3 solution is 0.625 M.
Explanation: To find the molarity of a solution, you need to know the moles of solute and the volume of the solution in liters. Here's how to solve the problem:
Calculate the moles of K2CO3 using its given mass and molar mass:
moles = mass / molar mass = 93.1 g / 136.21 g/mol = 0.682 mol
Calculate the volume of the solution in liters:
volume = 1.09 L
Calculate the molarity of the solution using the moles and volume:
molarity = moles / volume = 0.682 mol / 1.09 L = 0.625 M
how does carbon dioxide get into the atmosphere?
Answers
Answer:
By condensation.
Explanation:
Have a nice day dear
How many 4d electrons would be predicted in the ground state for the following elements?a. zirconiumb. cadmiumc. iridiumd. iron
Answers
In order to answer the question first we must write the atomic number of each element:
Zirconium (Zr): 40
Cadmium (Cd): 48
Iridium (Ir): 77
Iron (Fe): 26
Then, we have to complete the distribution of electrons in each orbital for each atom:
The first 4 levels have the following distribution:
Level1: 1s
Number of electrones: 2
Level 2: 2s, 2p
Number of electrones 8 (2 in the s orbital and 6 in the p orbitals).
Level3: 3s, 3p, 3d
Number of electrones 18 (2 in the s orbital, 6 in the p orbital and 10 in the d orbitals)
Level 4: 4s, 4p, 4d, 4f
Number of electrones 32 (2 in the s orbital, 6 in the p orbitals, 10 in the d orbitals and 14 in the f orbitals)
The order in which the orbitlas are completed depends on the energy of each level. For example the 4s orbitals will be completed before the 3d orbitals because their energy is lower.
The order is as follows:
1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d, 5p...
Now, knowing the atomic number we can answer the question:
For Zirconium (total 40 electrones):
\(1s^2,2s^2,2p^6,3s^2,3p^6,4s^2,3d^{10},4p^6,5s^2,4d^2\)2 electrones are predicted in the 4d orbital
For Cadmium (total 48 electrones):
\(1s^2,2s^2,2p^6,3s^2,3p^6,4s^2,3d^{10},4p^6,5s^2,4d^{10}^{}\)10 electrones are predicted in the 4d orbital
For iridium, as it has an atomic number higher than Cadmium we can predict tha it also complets the 4d orbital, then it has also 10 electrones in it.
For iron (total 26 electrones)
\(1s^2,2s^2,2p^6,3s^2,3p^64s^2,3d^6\)Iron has no electrones in the 4d orbitals
If u answer will answer the brainlest
Answers
Answer:
the electricity dissipated, because of the time.
Explanation:
electricity dissipates.
CREB
The brightness of a star as seen from Earth is referred to as
brightness.
Answers
Answer:
Explanation:
Astronomers define star brightness in terms of apparent magnitude. How bright the star appears from Earth and absolute magnitude is how bright the star appears at a standard distance of 32.6 light-years, or 10 parsecs. (A light-year is the distance light travels in one year is about 6 trillion miles, or 10 trillion kilo meters.) Astronomers also measure luminosity, the amount of energy (light) that a star emits from its surface.
Distance of a light year = 3600 x 24 x 365.25 x 3 x \(10^{5}\) ≅ 10 trillion kilo meters
Answer:
apparent
Explanation:
The brightness of a star as seen from Earth is referred to as
apparent brightness.
Question: How many grains of rice are in a 453.6 g (1lb.) bag of rice?
The rice is white.
The height of the bag of rice is 2.54 cm.
The length of the bag of rice is 20 cm.
The width of the bag of rice is 8 cm.
A grain of rice has a length of 6.0 mm.
20 grains of rice weigh .58 grams.
Answers
Answer:
453.6/58/2=453.6/2.9=156.314 grains
The number of grains in a 453.6 g (1lb.) bag of rice is equal to 157 grains of rice.
What is weight?The weight can be described as the force acting due to gravity. Weight can be considered as a vector quantity if the gravitational pull is acting on the body.
Therefore, in free fall, the weight of the object would be zero. Therefore, terrestrial objects can be weightless while ignoring air resistance.
The unit for measurement of weight is the same as of force, which is the newton. A body with a mass of 1 kilogram will exhibit a weight of about 9.8 Newton on the surface of the Earth, and about 1/6th as much weight on the Moon.
Given the weight of the 20 grains = 58 g
The weight of one grain = 58/20 = 2.9 g
The number of grains (n) of rice in weight 453.6 g of the bag of rice can be calculated as:
n = 453.6/2.9
n = 156.4 ≈ 157
Therefore, the number of grains can be considered equal to 157 grains of rice.
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a beaker containing 50.0 ml of 0.50 m naoh is titrated using a burette containing a solution of 0.50 m hcl. report all answers to two decimal places (e.g. 1.00) prompt 1what is the resulting ph of the solution if only 25.0 ml of titrant is added? answer for prompt 1 what is the resulting ph of the solution if only 25.0 ml of titrant is added? prompt 2what is the resulting ph of the solution if 50.0 ml of titrant is added? answer for prompt 2 what is the resulting ph of the solution if 50.0 ml of titrant is added? prompt 3what is the resulting ph of the solution if 75.0 ml of titrant is added?
Answers
The pH of the solution after 28.0 ml of NaOH have been added to the acid exists 0.85.
How to estimate the ph of the solution?The balanced reaction between base and acid exists;
NaOH + HCl → NaCl + H₂O
NaOH exists a strong base and HCl exists a strong acid therefore complete dissociation. Stoichiometry of acid to base exists 1: 1.
The number of moles of base added - 0.5 M /1000 mL/L × 28.0 mL = 0.014 mol
the number of acid moles present - 0.5 M /1000 mL/L × 50.0 mL = 0.025 mol.
acid reacts with base 1: 1 ratio
Therefore excess amount of acid present - 0.025 - 0.014 = 0.011 mol
Total volume = 50.0 + 28.0 = 78.0 mL
[H⁺] = 0.011 mol/0.078 L = 0.14 M
Therefore, pH = -log [H⁺]
substitute the values in the above equation, we get
pH = -log(0.14)
simplifying the above equation, we get
pH = 0.85.
Therefore, the pH of the solution after 28.0 ml of NaOH have been added to the acid exists 0.85.
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Solve the questions shown
Answers
The number of electrons, protons, and neutrons in argon is 18, 18 , and 22 respectively, the number of electrons , protons and neutrons in sulphur-32 is 16, 16, 16 respectively. The number of protons, neutrons, and electrons are 6 , 8 and 6. And for uranium-238 , 92 protons , 92 electrons and 146 neutrons.
What is proton, neutron, and electron and argon, sulphur, and uranium consist how many electrons, neutrons and protons?Electrons are the one revolving around the nucleus in shells K,L,M and N which have attraction to the nucleus.For uranium which is a radioactive element have two isotopes namely uranium-238 and uranium-235.The number of electrons , protons and neutrons in argon which is a noble gas element have 18, 18 and 22 respectively.The number of electrons, protons and neutrons in sulphur are 16, 16 and 16 respectively.The number of electrons, protons and neutrons in argon is 18,18 and 18 .To know more about electrons visit:
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the diels-alder reaction is one example of what type of reaction?
Answers
The Diels-Alder reaction is an electrocyclic process that involves the [4+2]cycloaddition of 2 and 4 electrons from the dienophile and 4 electrons from the conjugated diene (an alkene or alkyne).
What is a case of a Diels-Alder reaction?A conjugated diene and an alkene undergo a cycloaddition event in the Diels-Alder reaction. A 1,4-addition product is created by this reaction. The reaction of 1,3-butadiene with maleic anhydride serves as an example.
Which reaction most accurately sums up the Diels-Alder reaction?Consequently, [4+2] cycloaddition is the name given to the cyclic addition of diene and dienophile. This shows that a Diels-Alder reaction is best described by the [4+2] cycloaddition.
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Which of these ions has the correct charge?
O2-
B2+
P2-
Li2+
Answers
Answer:
B2
Explanation:
"+" contains positivity
How could IR spectroscopy distinguish between 1-hexyne, 2-hexyne, and 3-hexyne? Check all that apply.
2-Hexyne will show neither the absorption band at ∼3300cm−1 nor the one at ∼2100cm−1 (there is no change in dipole moment when the C≡C stretches).
1-Hexyne will show absorption bands at ∼3300cm−1 for a hydrogen bonded to an sp carbon and at ∼2100cm−1 for the triple bond.
3-Hexyne will show the absorption band at ∼2100cm−1 but not the one at ∼3300cm−1.
3-Hexyne will show neither the absorption band at ∼3300cm−1 nor the one at ∼2100cm−1 (there is no change in dipole moment when the C≡C stretches).
1-Hexyne will show the absorption band at ∼2100cm−1 but not the one at ∼3300cm−1.
2-Hexyne will show absorption bands at ∼3300cm−1 for a hydrogen bonded to an sp3 carbon and at ∼2100cm−1 for the triple bond.
1-Hexyne will show neither the absorption band at ∼3300cm−1 nor the one at ∼2100cm−1 (there is no change in dipole moment when the C≡C stretches).
1-Hexyne will show absorption bands at ∼2100cm−1 for a hydrogen bonded to an sp carbon and at ∼3300cm−1 for the triple bond.
2-Hexyne will show the absorption band at ∼2100cm−1 but not the one at ∼3300cm−1.
Answers
1-Hexyne will show absorption bands at ∼3300cm−1 for a hydrogen bonded to an sp carbon and at ∼2100cm−1 for the triple bond.
2-Hexyne will show absorption bands at ∼3300cm−1 for a hydrogen bonded to an sp3 carbon and at ∼2100cm−1 for the triple bond.
3-Hexyne will show the absorption band at ∼2100cm−1 but not the one at ∼3300cm−1.
IR spectroscopy is a technique that measures the vibrational modes of molecules. Each molecule has a unique set of vibrational modes that correspond to different types of bonds within the molecule. In the case of alkynes, the C≡C triple bond is a strong bond that will produce a characteristic peak in the IR spectrum at around 2100 cm^-1. The presence or absence of other peaks will depend on the specific structure of the molecule.
For 1-hexyne, the hydrogen bonded to the sp carbon will produce a peak at around 3300 cm^-1 due to the stretching of the C-H bond. The C≡C triple bond will produce a peak at around 2100 cm^-1.
For 2-hexyne, the hydrogen bonded to the sp3 carbon will produce a peak at around 3300 cm^-1 due to the stretching of the C-H bond. The C≡C triple bond will produce a peak at around 2100 cm^-1.
For 3-hexyne, the C≡C triple bond will produce a peak at around 2100 cm^-1, but there is no hydrogen bonded to an sp carbon, so there will be no peak at around 3300 cm^-1.
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The molar mass of cu is 63. 5 g/mol. The molar mass of ag is 107. 9 g/mol. What mass, in grams, of ag is produced from a reaction of 31. 75 g of cu? 26. 95 grams 107. 9 grams 215. 91 grams 431. 82 grams.
Answers
The correct answer is 107.9 g of Ag is produced from a reaction of 31. 75 gram of Copper.
How to calculate The Molar Mass?Molar mass of a substance is the mass in grams of one mole of the compound. A mole is the measurement of the number of things, such as atoms, molecules, and ions, that are present in a substance. Any material has 6.022 x 1023 molecules in a mole, it is known as Avogadro's number . The mole is used to determine the size of the tiniest entities quantitatively, just as we use a standard value to quantify many things, such as 1 dozen = 12 items.
Formula - Molar mass = mass in grams/mole = g/mol
Molar mass of a substance can be calculated as:
Given,
n = W/M, where
W = required mass
M= molar mas
Given chemical reaction is:
Cu + 2AgNO₃ → Cu(NO₃)₂ + 2Ag
From the stoichiometry of the reaction,
1 mole of Cu = produce 2 moles of Ag
Given mass of Cu = 31.75g
Molar mass of Cu = 63.5g/mol
Moles of Cu = 31.75g / 63.5g/mol = 0.5 moles
0.5 moles of Cu = produce 2×0.5 = 1 mole of Ag
Molar mass of Ag = 107.9g/mol
Required mass of Ag = 1mol × 107.9g/mol = 107.9 g
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determine the kb of an acid with a ka of 7.8x10-3. kw at 25 oc is 1x10-14 group of answer choices 1.3x10-11 1.3x1012 1.3x1011 1.3x10-12 1.3x10-10
Answers
For an ion-product constant for water, Kw = 1.0 × 10⁻¹⁴ the value base- dissociation constant, Kb is 1.3x10⁻¹². So, the correct choice for answer is option (d).
We have specify the rate constant for water, acid and base. The ion product constant of water Kw = 1x10⁻¹⁴
The acid dissociation constant of acid Ka = 7.8x10⁻³
We have to determine the base dissociation constant Kb. In any acid-base reaction, the equilibrium will move the reaction that forward to the stronger base. This equilibrium constant is referred to as the ion-product constant in case of water, Kw. At 25°C, Kw = 1.0 × 10⁻¹⁴ , water is an amphoteric. A base ionization constant (Kb) is defined as the equilibrium constant for the ionization of a base. Now, the product of the acid-dissociation constant for an acid and the base-dissociation constant for its conjugate base is the ion-product constant for water Ka x Kb = Kw
So, Kb = Kw/Kₐ
plugging the known values
=> Kb = 1x10⁻¹⁴/7.8x10⁻³
= 1.28× 10⁻¹² ~ 1.3 × 10⁻¹²
Hence, required value is 1.3 × 10⁻¹².
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The way Earth's rotation makes winds curve.
Answers
Answer:
it is called the prevailing westerlies
Explanation:
What is the [OH) if the poH is 4.9?
a) 4.9 x 10-10 M
Ob) 1.0 x 10-4 M
C) 1.25 x 10-5 M
O d) 7.94 x 10-10 M
Answers
Answer:
the answer is 4.9×10-10M
The ______________________________ of freshwater is greatest at 4 degrees Celsius.
A.) cohesion
B.) specific heat
C.) polarity
D.) density
Answers
dog water ;-; yes friend
what is a compound
Answers
Answer:
compound is a material formed by chemically bonding two or more chemical elements.
Explanation:
When the concentration of a reactant is doubled what effect does it have on the reaction rate if the order with respect to that reactant is (a) zeroth order, (b) first order, and (c) second order (explain)
Answers
The effect on the reaction rate when the concentration of a reactant is doubled depends on the order of the reaction with respect to that reactant.
(a) Zeroth order: If the reaction is zeroth order with respect to a reactant, then the reaction rate is not dependent on the concentration of that reactant. Therefore, doubling the concentration of the reactant will have no effect on the reaction rate.
(b) First order: If the reaction is first order with respect to a reactant, then the reaction rate is directly proportional to the concentration of that reactant. Therefore, doubling the concentration of the reactant will double the reaction rate.
(c) Second order: If the reaction is second order with respect to a reactant, then the reaction rate is proportional to the square of the concentration of that reactant. Therefore, doubling the concentration of the reactant will quadruple (4 times) the reaction rate.
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TRUE / FALSE. the entire food chain on earth is supported by the chemical process known as .
Answers
False. The chemical activity known as photosynthesis does not support the complete food chain on Earth. Plants and certain microorganisms employ a process called photosynthesis to transform solar energy into chemical energy, which is subsequently used to create sugars, the plant's primary source of nutrition.
Since this process creates oxygen, which is necessary for the majority of life forms, it is significant for the environment's health. However, other mechanisms that certain microorganisms and some animals utilise, such chemosynthesis and carnivory, also contribute to maintaining the food chain.
Additionally, photosynthesis is not the only process that transfers energy via the food chain. Sunlight provides energy to plants via the mechanisms through the microorganisms.
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What is the number of moles of glucose (C₆H₁₂O₆) in 0.500 L of a 0.40 M solution?
Answers
Answer:
0.20 moles
Explanation:
In order to solve this problem it is necessary to keep in mind the definition of molarity:
Molarity = moles / litersIf we input the data given by the problem we're left with:
0.40 M = moles / 0.500 LMeaning that we can proceed to calculate the number of moles:
moles = 0.40 M * 0.500 Lmoles = 0.20 molesThe number of moles of glucose (\(C_6H_{12}O_6\)) in 0.500 Liters of a 0.40 M solution is 0.2 moles.
Given the following data:
Molarity of solution = 0.40 MVolume of solution = 0.500 LTo determine the number of moles of glucose (\(C_6H_{12}O_6\)) in 0.500 Liters of a 0.40 M solution:
Mathematically, the molarity of a solution is given by the formula:
\(Molarity = \frac{number\;of\;moles}{Volume \;in\;liters}\)
Making number of moles the subject of formula, we have:
\(Number\;of\;moles = Molarity \times Volume\)
Substituting the given parameters into the formula, we have;
\(Number\;of\;moles = 0.40 \times 0.500\)
Number of moles = 0.2 moles.
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An asteroid in space has traveled 4,500 km in 60 s, what is the average speed of the asteroid?
Answers
How many moles are in 7.9 grams of P 2 O 5?
Answers
Answer: 0.0556555468903552 moles, you can estimate that to its nearest hundreth, or thousandth.
Explanation:
im just naturally a genius