Cl₂ -----> Cl⁻ + OCl⁻
The balance equation is :
Cl₂ + 2OH⁻ -----> Cl⁻ + OCl⁻ + H₂O
The unbalanced chemical equation is give as :
Cl₂ -----> Cl⁻ + OCl⁻
the medium is basic , so add OH⁻ in the left side to balnace the given equation.
Cl₂ + OH⁻ -----> Cl⁻ + OCl⁻
now, to balance OH⁻ ion add water H₂O to the right side of equation to balance the given equation, we get
Cl₂ + OH⁻ -----> Cl⁻ + OCl⁻ + H₂O
now to balance H multiply 2 in OH⁻ , we get
Cl₂ + 2OH⁻ -----> Cl⁻ + OCl⁻ + H₂O
Now, the given chemical equation is balanced .
Thus, Cl₂ -----> Cl⁻ + OCl⁻
The balance equation is :
Cl₂ + 2OH⁻ -----> Cl⁻ + OCl⁻ + H₂O
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7.Which of the following symbols indicates "water solution"?Select one:a. (s)b. (l)c. (g)d. (aq)
Whenever we have a solution with a solvent like water, and a solute that is dissolved in water, we can identify this dissolved solution as an aqueous solution, therefore the symbol will be (aq), letter D
The wave particle duality of matter is-
HELP PLEASEEE!
Answer:
C.) the idea that items like electrons can be described as both a particle and a wave
7.0 mol AgNO3 can form
3.5 mol Zn(NO3)2 and 3.0 mol Zn can
form 3.0 mol Zn(NO3)2. How many
moles of Zn(NO3)2 can form during the
reaction?
Based on the mole ratio from the reaction, the number of moles of Zn(NO₃)₂ that can be formed in the reaction is 3 moles.
What is the number of moles of Zn(NO₃)₂ that can be formed in the reaction?The number of moles of Zn(NO₃)₂ that can be formed in the reaction is determined from the mole ratio of the reaction in the given data.
Equation of the reaction:
2 AgNO₃ (aq) + Zn (s) ----> Zn(NO₃)₂ (aq) + 2 Ag (s)
From the data provided, 7.0 mol AgNO₃ can form 3.5 mol Zn(NO₃)₂.
The mole ratio of AgNO₃ can form 3.5 mol Zn(NO₃)₂; mole ratio is 2: 1
Also, 3.0 mol Zn can form 3.0 mol 3.5 mol Zn(NO₃)₂; mole ratio is 1 : 1
Mole ratio of AgNO₃ (aq) to Zn (s) is 2 : 1
The limiting reagent is Z
Moles of Zn(NO₃)₂ formed = moles of Zn reacted
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Answer: 3.0
..............................
A plane takes off and is flying forward with 20,000 N of applied force, and experiences 10,000 N of air resistance. It has 20,000 N of gravitational force and 20,000 N of lift (upward) force. Show how the forces affect the plane and is it balanced or unbalanced.
The forces affecting the plane are unbalanced. There is a net force in the forwarding direction.
A force is an influence that can exchange the movement of an object. Pressure can cause an item with mass to exchange its velocity, i.e., to accelerate. the force also can be described intuitively as a push or a pull. A pressure has each importance and direction, making it a vector quantity.
The internet force is the vector sum of forces appearing on a particle or object. The internet force is a single force that replaces the impact of the unique forces on the particle's movement.
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A chemist combusts a 5.679 g sample of C5H12 and obtains 10.42 g of CO2. The molar mass of C5H12 is 72.15 g/mol, and the molar mass of CO2 is 44.01 g/mol. What are the theoretical yield, actual yield, and percent yield of CO2? Show your work and round to the correct number of significant figures.
The balanced equation is: C5H12(l) + 8O2(g) --> 5CO2 + 6H2O(l)
The theoretical yield is 0.0395 moles of carbon dioxide while the percent yield is 608%
What is the theoretical yield?
We know that we can be able to obtain the theoretical yield of the reaction from the equation of the reaction and by the use of stoichiometry. We need to know the limiting reactant.
Number of moles of pentane = 5.679 g/72 g/mol = 0.0079 moles
Number of moles of CO2 = 10.42 g/44.01 g/mol = 0.24 moles
If 1 mole of pentane yields 5 moles of CO2
0.0079 moles of pentane yields 0.0079 moles * 5 moles/1 mole
=0.0395 moles or 1.738 g
Hence the percent yield of the CO2 is;
0.24 moles/0.0395 moles * 100/1
= 608%
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What nucleus emits an alpha particle and forms Th-234?
Uranium-238
Explanations:The process by which an atomic nucleus looses energy by radiation is known as radioactivity.
An alpha particle, have an atomic number of 2 and a mass number of 4 as shown;
[tex]_2^4He[/tex]When this is combined with Th-234, it forms Uranium-238. This shows that the uranium nucleus emits alpha particle to form Th-234 according to the chemical equation below;
[tex]_{92}^{238}U\rightarrow_2^4He+_{90}^{234}Th[/tex]A mixture of He, N2, and Ar has a pressure of 21.0 atm at 28.0 °C. If the partial pressure of He is 2427 torr and that of Ar is 1787 mm Hg, what is the partial pressure of N2?
N2=
The partial pressure of N₂ in the mixture containing He, Ar with a total pressure of 21 atm is 11,746 torr.
It is given that the mixture contains He with a partial pressure of 2427 torrs, Ar with 1787torres (1mmHg = 1 torr) and the total partial pressure is given by 21 atm (1atm = 760torr) which is 15960 torr.
To find the partial pressure of N₂, by using Dalton's atomic theory,
P total = Partial pressure of Ar + Partial pressure of He + Partial pressure of N₂
15960 = 1787 + 2427 + Partial pressure of N₂
Partial pressure of N₂ = 15960 - 4214
Partial pressure of N₂ = 11,746 torr
Therefore, the partial pressure of N₂ is 11,746 torr.
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Which statement defines dynamic equilibrium? A state of balance in which the rates of the forward and reverse reactions are equal. A state of balance in which the forward reaction stops but reverse reaction continues. A state of balance in which the forward reaction continues but reverse reaction stops. A state of balance in which the forward and reverse reactions stop.
Answer:
A state of balance in which the rates of the forward and reverse reactions are equal.
Explanation:
The dynamic equilibrium is a state of balance in which the rates of the forward and reverse reactions are equal, like we can see in the following drawing:
And the concentration of the reactants and products become stable in time.
Answer: A state of balance in which the rates of the forward and reverse reactions are equal.
Explanation:
chemical equilibrium is the state in which both the reactants and products are present in concentrations which have no further tendency to change with time.
What is the molarity of a solution composed of 106 g Na Cozin 6.00 L ofsolution?
To solve this problem, we're going to use the formula of molarity:
[tex]\text{Molarity (M)=}\frac{mole\text{s of solute}}{liter\text{s of solution}}\text{.}[/tex]We have to find the number of moles in 106 g of Na. The molar mass of Na can be found in the periodic table, which is 23 g/mol. The conversion would be:
[tex]106\text{ g Na}\cdot\frac{1\text{ mol Na}}{2\text{3 g Na}}=4.61\text{ moles Na.}[/tex]Finally, we replace the moles (4.61 moles) and the liters of solution (6.00 L) in the formula:
[tex]\text{Molarity = }\frac{4.61\text{ moles}}{6.00\text{ L}}=0.768\text{ M.}[/tex]The molarity of the solution would be 0.768 M.
Which of the following compounds is capable
of dipole-dipole interactions?
SF6
CH4
H₂CO
CO₂
The capable of dipole-dipole interactions is H₂CO
Dipole-Dipole InteractionsDipole-dipole interactions, which result from the close association of induced or permanent dipoles, are weak interactions. Van der Waals interactions are the name given to these forces taken as a whole. These interactions are widespread in proteins and range widely in strength. Examples of polar compounds that interact dipole-dipole include hydrogen chloride (HCl), carboxylic acids (such as acetic acid), and amino acids. A polar molecule's positive end will pull another molecule's negative end and change the other molecule's location.
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[tex]2CH_{3}OH + 3O_{2}[/tex] → [tex]2CO_{2} + 4H_{2}O[/tex]how many moles of [tex]CH_{3}OH[/tex] are needed to produce 3 moles of [tex]CO_{2}[/tex]?
1) Balance the chemical equation.
[tex]CH_3OH+O_2\rightarrow CO_2+H_2O[/tex]2) List the elements in the reactant and in the products.
Reactants:
C: 1
H: 4
O: 3
Products:
C: 1
H: 2
O: 3
BalanceH.
[tex]CH_3OH+O_2\operatorname{\rightarrow}CO_2+2H_2O[/tex]Reactants:
C: 1
H: 4
O: 3
Products:
C: 1
H: 4
O: 4
Balance oxygen
[tex]CH_3OH+\frac{3}{2}O_2\operatorname{\rightarrow}CO_2+2H_2O[/tex]Multiply every coefficient by the denominator
[tex]2CH_3OH+3O_2\operatorname{\rightarrow}2CO_2+4H_2O[/tex]Reactants:
C: 2
H: 8
O: 8
Products:
C: 2
H: 8
O: 8
3) Moles of CH3OH needed to produce 3 mol CO2.
The molar ratio between CH3OH and CO2 is 2 mol CH3OH: 2 mol CO2.
[tex]mol\text{ }CH_3OH=3\text{ }mol\text{ }CO_2*\frac{2\text{ }mol\text{ }CH_3OH}{2\text{ }mol\text{ }CO_2}[/tex][tex]mol\text{ }CH_3OH=3\text{ }mol\text{ }CH_3OH[/tex]The moles of CH3OH needed are 3 mol.
.
CO is a colorless, tasteless gas and a by product of incomplete combustion. Calculate the pressure in atm, occupied by this gas, at 42.5L, 65 degrees Celsius, 1.52 moles. Please include equation used, variable you solved for and answer with the correct units
Answer:
[tex]P\text{ = 0.992 atm}[/tex]Explanation:
Here, we want to get the pressure occupied by the gas under the given conditions
We can use the ideal gas equation here
Mathematically, we have this as:
[tex]PV\text{ = nRT}[/tex]P is the pressure which we want to calculate
V is the volume occupied by the gas given as 42.5 L
n is the number of moles, given as 1.52 moles
R is the molar gas constant which is :
[tex]R\text{ = }0.082057LatmK^{-1}mol^{-1}[/tex]T is the temperature which we have to convert to absolute temperature scale (Kelvin) by adding 273.15 K to the Celsius temperature
[tex]273.15\text{ + 65 = 338.15 K}[/tex]Let us rewrite the equation in terms of the Pressure, which we want to calculate
We have this as:
[tex]P\text{ = }\frac{nRT}{V}[/tex]Finally, we proceed to substitute the values given above:
[tex]\begin{gathered} P\text{ = }\frac{1.52\text{ }\times0.082057\times338.15}{42.5} \\ \\ P\text{ = 0.992 atm} \end{gathered}[/tex]Consider the balanced reaction of magnesium and oxygen.
2 Mg + O2–>2 MgO
What mass, in grams, of MgO can be produced from 1.78 g of Mg and 2.36 g of O2?
Taking into account the reaction stoichiometry, 2.95 grams of MgO from 1.78 g of Mg and 2.36 g of O₂.
Reaction stoichiometryIn first place, the balanced reaction is:
2 Mg + O₂ → 2 MgO
By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:
Mg: 2 molesO₂: 1 moleMgO: 2 molesThe molar mass of the compounds is:
Mg: 24.31 g/moleO₂: 32 g/moleMgO: 40.31 g/moleThen, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:
Mg: 2 moles ×24.31 g/mole= 48.62 gramsO₂: 1 mole ×32 g/mole= 32 gramsMgO: 2 moles ×40.31 g/mole= 80.62 gramsLimiting reagentThe limiting reagent is one that is consumed first in its entirety, determining the amount of product in the reaction. When the limiting reagent is finished, the chemical reaction will stop.
Limiting reagent in this caseTo determine the limiting reagent, it is possible to use a simple rule of three as follows: if by stoichiometry 32 grams of O₂ reacts with 48.62 grams of Mg, 2.36 grams of O₂ reacts with how much mass of Mg?
mass of Mg= (2.36 grams of O₂× 48.62 grams of Mg)÷ 32 grams of O₂
mass of Mg= 3.586 grams
But 3.586 grams of Mg are not available, 1.78 grams are available. Since you have less mass than you need to react with 2.36 grams of O₂, Mg will be the limiting reagent.
Mass of Mg formedConsidering the limiting reagent, the following rule of three can be applied: if by reaction stoichiometry 48.62 grams of Mg form 80.62 grams of MgO, 1.78 grams of Mg form how much mass of MgO?
mass of MgO= (1.78 grams of Mg× 80.62 grams of MgO)÷ 48.62 grams of Mg
mass of MgO= 2.95 grams
Finally, 2.95 grams of MgO can be produced.
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What is the mass of water in a 23.5 % solution containing 15.9 g of potassium chlorate?
Considering the definition of percentage by mass, the mass of water in a 23.5 % solution containing 15.9 g of potassium chlorate is 50.63 grams.
Definition of percentage by massThe percentage by mass expresses the concentration and is defined as the ratio of the mass of the solute to the mass of the solution, expressed as a percentage.
The percentage by mass is calculated as the mass of the solute divided by the mass of the solution, the result of which is multiplied by 100 to give a percentage:
percentage by mass= (mass of solute÷ mass of solution)× 100%
Mass of waterIn this case, you know:
percentage by mass= 23.5%mass of solute= 15.9 gmass of water= ?Replacing in the definition of percentage by mass:
23.5%= (15.9 grams÷ mass of solution)× 100%
Solving:
23.5%÷ 100%=15.9 grams÷ mass of solution
0.235= 15.9 grams÷ mass of solution
0.235× mass of solution= 15.9 grams
mass of solution= 15.9 grams÷ 0.235
mass of solution= 66.53 grams
Considering that the mass of solution is the sum of mass of solute and mass of water, the mass of water can be calculated as:
mass of solution= mass of solute + mass of water
66.53 grams= 15.9 grams + mass of water
66.53 grams- 15.9 grams= mass of water
50.63 grams= mass of water
Finally, the mass of water is 50.63 grams.
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How many liters of solution would need to be used to make a 1.5 M solution of HCI if we had 45g of HCI?
Explanation:
We have to find the volume of a 1.5 M solution of HCl that we can make with 45 g of HCl.
The molarity of a solution is defined like this:
Molarity = moles of solute/(volume of solution in L)
We already know the molar concentration and the volume is our unknown.
volume = ?
molarity = 1.5 M
The solute of our solution is going to be HCl and we can convert the grams of it into moles using its molar mass.
molar mass of H = 1.01 g/mol
molar mass of Cl = 35.45 g/mol
molar mass of HCl = 1 * 1.01 g/mol + 1 * 35.45 g/mol
molar mass of HCl = 36.46 g/mol
moles of HCl = 45 g * 1 mol/(36.46 g)
moles of HCl = 1.23 mol
Finally we can replace these values in the molarity formula and solve it for the volume to get the answer to our problem.
Molarity = moles of HCl/(volume of solution)
volume of solution = moles of HCl/(molarity)
volume of solution = 1.23 moles/(1.5 M)
volume of solution = 0.82 L
Answer: We will need to use 0.82 L.
If a container has 3 moles of a compound in 6 liters of solution, what is the concentration?2.000 M0.500 M1.000 M1.500 M
Molarity or molar concentration is a measure of the concentration of a chemical species, of a solute in a solution, using as units, number of moles, and volume in liters. The formula for Molarity is:
M = n/V
Where:
n = number of moles, 3 moles
V = volume in Liters, 6 Liters
Now adding these values into the formula:
M = 3/6
M = 0.500 M is the molarity or molar concentration, 2nd option
A golden-colored cube is handed to you. The person wants you to buy it for $100, saying that is a gold nugget. You pull out your old geology text and look up gold in the mineral table, and read that its density is 19.3 g/cm3. You measure the cube and find that it is 2 cm on each side, and weighs 40g. What is its density? Is it gold? Should you buy it? Make sure you include units and provide details to support your response.
The density is 5g/cm³ and the cube is not gold and i will not buy it
Density is the mass of the object divided by its volume gives the density of the object
Here given data is
Mass = 40g
Volume of cube = 2cm
Volume = 2³
Volume = 2×2×2cm³
Volume = 8cm³
Density of cube = ?
Then formula of density is
Density = mass/volume
Density of cube = 40g/ 8cm³ = 5g/cm³
Therefore, the given gold has density = 19.3 g/cm³ and cube density is less than of gold so cube is not a gold and i will not buy it
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IS NEEDED ASAP PLEASE
Read the selection from the section "Yeast And Fermentation."
For example, the organelles in yeast allow it to perform processes like fermentation. Humans have long harnessed fermentation to make bread, wine, beer, and even biofuel. Fermentation is possible because of certain enzymes within yeast that allow it to convert sugars into alcohol.
Which two words would BEST replace "harnessed" and "convert" in the selection above?
controlled; blend
admired; separate
rejected; remove
used; transform
The correct answer is used, transform. Option D.
The word used means to control and use and the word transform means to change or transform. The other options are incorrect because they have different meanings than bind and convert. Adjective superlative of good better than comparative Highest Quality Excellence or Reputation Best Work best student.
Most Advantageous Most Suitable, or Most Desirable Best Way. Replace something or put something or someone in place of something or someone else Factories have replaced most of their workers with robots. Best can be a noun. Marilyn only wanted the best for herself and her family. As an adverb, it's best to modify a verb. is the best. The noun best may or may not be countable.
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if 2.00 moles of H2 and 1.55 moles of o2 react how many moles of exess reagent will be left over 2H2(g)+O2(g)=2H2O (g)
2 moles of excess reagent will be left over 2H2 + O2 = 2H20 when 2 moles of H2 and 1.55 moles of oxygen react.
What is a mole and how many moles of excess reagent will be left over ?A mole is one of the seven fundamental quantity to determine the amount of substance present in per litre of solution.In the question is given the number of moles of hydrogen is 2 moles, number of moles of oxygen is 1.55 .2H2 + O2 = 2H20 is the balanced equation of the question upon which we will calculate the number of moles which will be left over.Because two moles of water molecules is formed by then all the hydrogen molecules would already have been consumed.The remaining amount of oxygen will remain unreacted , in the reaction .To know more about moles visit:
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Aqueous hydrochloric acid (HCI) will react with solid sodium hydroxide (NaOH) to produce aqueous sodium chloride (NaCl) and liquid water (H₂O).
Suppose 17. g of hydrochloric acid is mixed with 6.44 g of sodium hydroxide. Calculate the minimum mass of hydrochloric acid that could be left over by the
chemical reaction. Round your answer to 2 significant digits.
The minimum mass of hydrochloric acid that could be left over by the
chemical reaction, is nearly 12.0 grams.
How to calculate leftover mass?According to given reaction is :
HCl +NAOH --> NaCl + H2O
mass of HCl = 35 g
molar mass of HCl=36.46 g/mol
moles of HCl present = 35 g/36.46 g/mol =0.466 moles
mass of NaOH = 6.44 g
molar mass of NaOH= 40 g/mol
moles of NaOH present = 28.7 g/40g/mol = 0.161 moles
Moles of HCl is more than that of NaOH. Hence limiting reactant is NaOH
It will consume completely
mole ratio HCl : NaOH= 1:1
thus moles of HCL consumed = moles of NaOH present =0.141 moles
moles of HCl remaining = 0.466 moles- 0.141 moles = 0.325 moles
molar mass of HCl= 36.46 g/mol
mass of HCl remaining = moles of HCl remaining* molar mass
= 0.325 mol *36.46 g/mol = 11.84 g
after rounding
mass = 12.0 g
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Pls help it’s due by Friday and I don’t understand the question
The average atomic mass of an element is calculated by multiplying the masses of all of its isotopes by the element's natural abundance (the decimal associated with percent of atoms of that element that are of a given isotope)
How does the average atomic mass of an element change depending on the percent abundance of its isotopes?Explanation: The Periodic Table's referenced atomic mass is the WEIGHTED average of each isotopic mass. The more that isotope contributes to the isotopic mass, the larger its isotopic percentage. Because of this, non-integral masses make up the majority of the masses stated on the Table.
How can you calculate atomic mass using isotope abundance and natural mass?Divide each percentage of abundance into decimal form Multiply this number by the isotope's atomic mass, which is 100. To get the average atomic mass for each isotope, add everything up.
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What are possible indicators that a chemical reaction has occurred?
Which location focuses its use on a nonrenewable energy source?
Natural gas power plants focus on using non-renewable energy resources.
Found in subterranean layers of rocks and sediments. Pressure and heat worked together to transform plant and animal debris into crude oil also known as petroleum coal, and natural gas. Our energy supply comes primarily from fossil fuels, with nuclear power and renewables rounding out the whole. These sources mainly come from our nearby star the Sun. Electricity falls into its own category because it is an energy medium and not a primary source.
Non-renewable energy resources are limited because they usually take time to replenish. The advantage of these non-renewable resources is that the power plants that use them can produce more electricity on demand. A non-renewable energy resource is a coal. Non-renewable energy is an energy source that will eventually run out. Most non-renewable energy sources are fossil fuels such as coal gas, and oil.
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Answer:natural gas powerplant
Explanation: because
It was shown that 150 J was required to raise the temperature of 20.0 g of an unknown metal from 30°C to 50°C. Using a table of specific heat
capacities, identify the unknown metal.
Answer:
0.375 J/g°C
Brass
Explanation:
To identify the unknown metal, you first need to calculate the specific heat capacity using the following equation:
Q = mcΔT
In this equation,
-----> Q = heat energy (J)
-----> m = mass (g)
-----> c = specific heat capacity (J/g°C)
-----> ΔT = change in temperature (°C)
You can find the specific heat capacity by plugging the given values into the equation and simplifying to find "c".
Q = 150 J c = ? J/g°C
m = 20.0 g ΔT = 50°C - 30°C = 20°C
Q = mcΔT <----- Given equation
150 J = (20.0 g)c(20°C) <----- Insert values
150 J = (400 g°C)c <----- Multiply 20.0 g and 20°C
0.375 J/g°C = c <----- Divide both sides by 400 g°C
The specific heat capacity of the unknown metal is 0.375 J/g°C. According to my research, there is no metal with this exact specific heat capacity. However, the closest I could find was brass (0.377 J/g°C).
How many grams of silver/IN dichromate are neiled)when 353 p of Tin 1 hydrogen carbonate is complailyused up in a double displacement reaction? Use the following balanced equation:1 Sn(HCO3)2 + 1 Ag›Cr207 ---> 1 SnCr207 + 2 AgHCO3
Answer:
[tex]63.63\text{ g}[/tex]Explanation:
Here, we want to get the mass of silver(I) dichromate needed
Firstly, we need to get the number of moles of Tin(I) Hydrogen Carbonate used up
To get this, we have to divide the mass used up, by the molar mass
The molar mass of Tin(I) Hydrogen Carbonate is 241 g/mol
Mathematically:
[tex]Number\text{ of moles = }\frac{mass}{molar\text{ mass}}[/tex]We have the number of moles as:
[tex]Number\text{ of moles = }\frac{35.5}{241}\text{ = 0.1473 mole}[/tex]From the equation of reaction, 1 mole of Tin hydrogen carbonate used 1 mole of silver dichromate
That means 0.1473 mole of the carbonate will also use 0.1473 mole of the dichromate
Now, to get the mass of the dichromate, we have to multiply the number of moles by the molar mass of the dichromate
The molar mass of the dichromate is 432 g/mol
Thus, we have the mass used up as:
[tex]0.1473\text{ }\times\text{ 432 = 63.6 g}[/tex]Someone help me 1-10 correct answer only I give Brainly
The following substances are classified as
1. Chicken Noodle Soup is heterogeneous mixture. 2. Salt (NaCl) is Pure Substance. 3. Concrete is a heterogeneous mixture. 4. Vegetable Oil is homogeneous mixture. 5. Air is Homogeneous mixture. 6. Paint is Heterogeneous mixture. 7. Sea water is Homogeneous mixture. 8. Alcohol is Pure Substance. 9. Steel is Homogeneous mixture. 10. Sugar is Homogeneous mixture.
What is Pure Substance ?Pure substance are defined as the substance which has a constant or fixed chemical composition throughout.
What is Homogeneous mixture?Homogeneous mixture is defined as the mixture in which the components are mixed up with the same appearance and uniformly throughout the mixture.
What is Heterogeneous mixture?Heterogeneous mixture is defined as the mixture in which the composition is not uniform throughout the mixture.
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What is the temperature (in K) of a sample of helium with an root-
mean-square velocity of 450.0 m/s? The universal gas constant,
R=8.3145 J/mol.K.
Temperature of the sample helium with an root-mean-square velocity of 450.0 m/s is 32.47K
What is root mean square (rms) velocity?The value of the square root of the sum of the squares of the stacking velocity values divided by the number of values is the root-mean square (rms) velocity.
As we know, from Maxwell's speed distribution, the rms speed of velocity of gas is given by,
[tex]V_{rms}[/tex] = [tex]\sqrt{3RT/M}[/tex]
450 = [tex]\sqrt{(3*8.3145*T)/4*10^{-3} }[/tex] [ Mass of helium = 4.00 u]
T = 32.47 K
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Your kidneys remove this type of waste from your cells
A:carbon dioxide
B:oxygen
D:nitrogen
Answer:
D:nitrogen
Explanation:
Nitrogen is a waste product that your kidneys remove from your blood.
Question 18 of 25Which are the correct descriptions of the phase changes?Check all that apply.O A. Vaporization is a change from gas to liquid.B. Sublimation is a change from solid to gas.C. Boiling is a change from liquid to gas.aD. Condensation is a change from liquid to gas.
Answer
Explanation
A is wrong because vaporization, conversion of a substance from the liquid to gas, not the other way round.
B is correct because sublimation is the transition from the solid phase to the gas phase without passing through an intermediate liquid phase.
C is correct because boiling is the process by which a liquid turns into a vapor/gas when it is heated to its boiling point.
D is correct because condensation is the change from a vapor to a condensed state
Calculate the number of grams present in 100 atoms of aluminum?
Answer
1 mole Al= 27gm
6.022X10^23 atoms of Al=27 gm
1 atom Al=( 27/6.022X10^23)gm
100 atom Al= (27/6.022X10^23) X 100 gm
= 4.4835 X 100 X 10^-23
= 4.4835X( 10^-21) gram====>>answer
