If the atmospheric pressure in the laboratory is 1.2 atm, how many moles of gas were in each syringe? (Hint: Choose one volume and temperature pair from your data table to use in your ideal gas law calculation.)
Answers
Answer:
A: 2.525 x 10-4 mol
B: 2.583 x 10-4 mol
Explanation:
Part A:
Data Given:
. Temperature of water (H2O) = 21.3°C
Convert Temperature to Kelvin
T = °C + 273
T = 21.3 + 273 = 294.3 K
volume of (H2O) gaseous state = 5.1 mL
Convert mL to liter
1000 mL = 1L
5.1 ml = 5.1/1000 = 0.0051 L
Pressure = 1.2 atm
. no. of moles = ?
Solution
no. of moles can be calculated by using ideal gas formula
PV = nRT
Rearrange the equation for no. of moles
n=PV/RT......... (1)
where
P = pressure
V = Volume
T= Temperature
n = Number of moles
R = ideal gas constant
where
R = 0.08206 L.atm/ mol. K
Now put the value in formula (1) to calculate no. of moles of
n = 1.2 atm x 0.0051 L / 0.08206 L.atm.mol-1. K-1 x 294.3 K
n = 0.0061 atm.L / 24.162 L.atm.mol-1
n = 2.525 x 10-4 mol
no. of moles of gas (H2O) = 2.525 x 10-4 mol
Part B:
Data Given:
Temperature of water (H2) = 21.3°C
Convert Temperature to Kelvin
T = "C + 273
T= 21.3 + 273 = 294.3 K
volume of (H2) gas = 5.2 mL
Convert mL to liter
1000 mL = 1 L
5.2 ml = 5.2/1000 = 0.0052 L
Pressure = 1.2 atm
. no. of moles = ?
Solution
no. of moles can be calculated by using ideal gas formula
PV = nRT
Rearrange the equation for no. of moles
n= PV / RT......... (1)
where
P = pressure
V = Volume
T= Temperature
n = Number of moles
R = ideal gas constant
where
R = 0.08206 L.atm/mol. K
Now put the value in formula (1) to calculate no. of moles of
n = 1.2 atm x 0.0052 L/0.08206 L.atm.mol-1. K-1 x 294.3 K
n = 0.0062 atm.L/ 24.162 L.atm.mol-1
n = 2.583 x 10-4 mol
I
no. of moles of gas (H2) = 2.583 x 10-4 mol
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Answer:
No oxygen
Explanation:
when something is covered in a blanket it prevents the fire from being able to have any oxygen
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Explanation:
A fire needs three things to burn always: fuel, oxygen, and a heat source. Eventually the heat source will not be an issue, but the oxygen and fuel is. If the fire is small enough throwing a blanket can quite smother it. What happens is it cuts off the oxygen supply the fire needs long enough for it to die out.
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Answer:
pH value test can be used to demonstrate that NaOH is a stronger alkali than NH3
Explanation:
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Answers
Answer: no free electrons
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15. Calculate the hydrogen ion concentration of a
solution whose pH is 2.4
A 3.6 x 0.01
B 2.5 x 0.0001
C 2.5 x 0.01
D 7.0 x 0.01
Answers
Answer:
Explanation:
pH = − log [H+] , we can solve for [H+] as,
− pH = log [H+] ,
[H+] = 10^−pH,
so PH =2.4 in you case is
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The option are not correct it looks
How many moles are in 1.5L of 0.40M Na2SO4?
Answers
Answer:
0.60 moles of Na₂SO₄
Explanation:
Molarity is an unit of concentration defined as the ratio between moles of solute and liters of solution.
A solution of Na₂SO₄ 0.40M contains 0.40 moles of solute (Na₂SO₄) per liter of solution.
As you have 1.5L of solution, moles of Na₂SO₄:
1.5L × (0.40mol / L) = 0.60 moles of Na₂SO₄
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Explanation:
Answer:
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Explanation:
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Answers
Answer:
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Explanation:
Total protons + total neutrons = mass number
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Explanation:
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Answer:
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Answer:
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Answers
Answer:
HNO3 ->NO3²- + H+
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Answers
Answer:
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Explanation:
Firstly, we write the equation of reaction.
When alkali earth metals react with dilute mineral acid, the reaction is vigorous with the production or evolution of hydrogen gas as a result of the displacement of the hydrogen from the acid by the metal. This is one of the basic reactions of mineral acids
Ca + H2SO4 ——> CaSO4 + H2
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What we do now is to calculate the number of moles of calcium produced by 20g of Ca
Mathematically;
number of moles = mass/atomic mass
number of moles of calcium is thus
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Answers
Answer:
0.077M is the concentration of the hydroxyl ion
Explanation:
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Answers
Answer:
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Explanation:
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Answer:
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Answer:
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Explanation:
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Explanation:
did the test online got 100%
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Answers
Answer:
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Answers
Answer:
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Explanation:
Na2CO3 is a compound soluble in water. So the correct option is A.
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The common ionic solids' solubility laws are as follows. When two rules seem to conflict with one another, the prior rule is used.
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Explanation:
23
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Answers
Answer:
Explanation:
Magnesium when it oxidizes has a valence of 2.
Oxygen, when it mixes with something, has a valence of - 2
So Mg and O2 will form something, but what? The answer is MgO
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To balance this equation, you need 2 Magnesiums on the right and 2 Oxygens also on the right. The left will need a two Magnesiums.
The balanced equation will be
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The energy from 0.015 moles of octane was used to heat 250 grams of water. The temperature of the water rose from 293.0 K to 371.2 K. What is the enthalpy of combustion of octane? The specific heat capacity of water is 4.18 J/K g.
A. -5448 kJ/mol
B. 1226 kJ/mol
C. -1226 kJ/mol
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Answers
Answer:
A.) -5448 kJ/mol
Explanation:
I got it correct on founders edtell
CHEMISTRY PUNKS PLEASE HELP ME OUT!!!!!!!!!!!!!!!!! PLS. ILL LOVE U FOREVER N EVER! any point stealers will be reported <3
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Answer: 25.0 L
Explanation:
For this problem, we will need to use Boyle's Law.
Boyle's Law: P₁V₁=P₂V₂
Since we are looking for V₂, we can rewrite the equation.
V₂=P₁V₁/P₂
The pressure should be in atm, so let's convert kPa to atm.
P₁=100 kPa=0.99 atm
P₂=200 kPa=1.97 atm
Now that we know the pressure in atm, we can plug it into the equation and solve.
[tex]V_{2} =\frac{(0.99 atm)(50.0L)}{1.97atm}[/tex]
[tex]V_{2} =25.0 L[/tex]
Select all statements that are true for Sn1 reactions. (a) Formation of the carbocation is the rate-determining step (RDS) (b) The reaction rate depends upon the concentration of both the nucleophile and the electrophile (c) Reactions at chiral carbons proceed with inversion of stereochemistry (d) None of these statements are true for Sn1 reactions (e) Carbocation rearrangements are never observed
Answers
Answer:
(a) Formation of the carbocation is the rate-determining step (RDS)
(c) Reactions at chiral carbons proceed with inversion of stereochemistry
Explanation:
SN1 reactions arenucleophilic substitution reactions in which the rate determining step is unimolecular.
The formation of a carbocation is the rate determining step. This depends on the electrophilicity of the leaving group. Thus the SN1 reaction mechanisms is dependent on the electrophile and not the nucleophile.
Polar and acidic solvents which can assist in the formation of the carbocation speeds up the rate determining step.
If the formation of carbocation occurs at a chiral center, both retention and inversion of stereochemistry are likely to occur.
Therefore, the correct options are A and C.
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Please help, I will mark the answer with brainlist...
Answers
Answer: 30.06% is your answer.
I hope this helps.
Stay safe and have a good day :D
What is the function of these organelles?
endoplasmic reticulum:
Golgi body:
mitochondrion:
ribosome
Answers
Answer:
endoplasmic reticulum:
✔ helps in the production and movement of materials
Golgi body:
✔ packages and distributes materials in and out of cell
mitochondrion:
✔ supplies energy that the cell uses
ribosome:
✔ produces proteins for the cell
Explanation:
I did it on Edge
The function of endoplasmic reticulum is it helps in production and movement of a material.
What is endoplasmic reticulum?Endoplasmic reticulum is defined as a network of membranous tubules present within the cytoplasm of a eukaryotic cell.
It is one of the important organ of human body system which helps us in production and movement of material from one body part to another.
Golgi body helps in packaging and distribution of material in and out of cells.
Mitochondrion supply the energy to the cell. It is called as a power house of cell.
Ribosome helps to produce protein for the cell. It is called as protein factory.
Thus, the function of endoplasmic reticulum is it helps in production and movement of a material.
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Complete the table to summarize the properties of the different subatomic particles by typing in 'yes"
or "no."
A
Answers
Answer:
A=yes
B=yes
Explanation:
Just did the same thing
Protons and neutrons are made of quarks but electrons are not. So A is yes, B is Yes and C is No.
What are quarks?
Quarks are extremely small substances which join with each other by extremely strong forces and makeup neutrons and protons of the atom. They combine in a similar way that the protons and neutrons combine to form the nucleus of an atom.
Quarks are categorized in flavours and there are 6 different types of flavours of quarks. The flavours differ from each other on the basis of their charge and mass.
The six flavours of quarks are grouped as three pairs. These are up and down, charm and strange and top and bottom.
Quarks are defined as true elementary particles. They have no defined structure and cannot be subdivided into smaller particles.
Therefore, the correct option is A is yes, B is Yes and C is No.
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