Answer:
Partial pressure of Ar = 0.73 atm
Explanation:
Given data:
Volume of flask = 1.00 L
Mass of Ar = 1.20 g
Temperature = 25 °C (25+273.15 K= 298.15 k)
Total pressure = 1.300 atm
Partial pressure of Ar = ?
Solution:
First of all we will calculate the number of moles of Ar:
Number of moles = mass/ molar mass
Number of moles = 1.20 g/ 39.95 g/mol
Number of moles = 0.03 mol
Pressure of Ar:
PV = nRT
R = general gas constant = 0.0821 atm.L /mol.K
P×1.00 L = 0.03 mol × 0.0821 atm.L /mol.K× 298.15 k
P = 0.73 atm.L /1.00 L
P = 0.73 atm
Total pressure = Partial Pressure of Ar + Partial pressure of ethane
1.300 atm = 0.73 atm + P(ethane)
P(ethane) = 1.300 atm - 0.73 atm
P(ethane) = 0.57 atm
How the lead (II) carbonate can be separated and collected from the product mixture with ammonium nitrate?
Answer:
fgedhwkmgfvhcdnxj
Explanation:
gtryijdohuygfvbhgfy
How can you ensure the chemical reaction produces the right amount of heat in a hot pack without hurting you?
Answer:
Heat packs that contain iron and water packets: Exposing the solution to air results in the oxidation of the iron (creates rust). The oxidation of the iron is an exothermic process. Heat packs that contain supersaturated sodium acetate: These are reusable, the packs are boiled to dissolve sodium acetate.
Explanation:Thanks for asking question
how glass tube filed with acidified potassium dichromate detect drunken driver
Answer:
See explanation
Explanation:
The reaction between alcohol and acidified potassium dichromate is a redox reaction. This reaction can be used to detect a drunken driver.
Alcohols can be oxidized to aldehydes, ketones and carboxylic acids depending on the structure of the alcohol. Primary alcohols yield adehydes and carboxylic acids while secondary alcohols are oxidized to ketones.
The colour of the acidified potassium dichromate turns from orange to green when exposed to alcohols from the breath of a drunken driver.
A sample of methane gas collcted t a pressure of 0.0884 atm and a temperature of 6.00 C is found to occupy a volume of 26.5 L. How many moles of CH4 gas are in the sample? ____ mol
Answer:
0.1mole
Explanation:
Given parameters:
Pressure = 0.0884atm
Temperature = 6°C = 6 + 273 = 279K
Volume occupied = 26.5L
Unknown:
Number of moles = ?
Solution:
To solve this problem, we are going to use the ideal gas equation:
PV = nRT
P is the pressure
V is the volume
n is the number of moles
R is the gas constant = 0.082atmLmol⁻¹k⁻¹
T is the temperature.
Insert the parameters and solve for n;
0.084 x 26.5 = n x 0.082 x 279
n = 0.1mole
0.2 moles of aluminum has a mass of 5.4 g. what is The molar mass of aluminum
Answer:
Molar mass = 27 g/mol
Explanation:
Given data;
Number of moles of Al = 0.2 mol
Mass of Al = 5.4 g
Molar mass of Al = ?
Solution:
Formula:
Number of moles = mass/molar mass
By putting values,
0.2 mol = 5.4 g/ molar mass
Molar mass = 5.4 g/ 0.2 mol
Molar mass = 27 g/mol
How many liters of O2 at STP will react with 8.7 grams of C2H4 to form CO2 and H2O? C2H4 + 3 O2 -------> 2 CO2 + 2 H2O
Answer:
6.944 liters of O₂ at STP will react with 8.7 grams of C₂H₄ to form CO₂ and H₂O.
Explanation:
The balanced reaction is:
C₂H₄ + 3 O₂ ⇒ 2 CO₂ + 2 H₂O
Being the molar mass of the elements:
C: 12 g/moleH: 1 g/moleThen the molar mass of compound C₂H₄ is:
C₂H₄= 2*12 g/mole + 4*1 g/mole= 28 g/mole
By stoichiometry of the reaction (that is, the relationship between the amount of reagents and products in a chemical reaction), 1 mole of C₂H₄ acts. Then, being the mass of a mole of a substance, which can be an element or a compound, 1 mole of C₂H₄ is 28 g, which is the amount of mass that reacts in this case.
Then be able to apply the following rule of three: if by stoichiometry 28 grams of C₂H₄ react with 3 moles of O₂, 8.7 grams of C₂H₄ with how many moles of O₂ do they react?
[tex]moles of O_{2} =\frac{8.7 grams ofC_{2} H_{4}*3 moles of O_{2} }{28grams ofC_{2} H_{4}}[/tex]
moles of O₂= 0.31
The STP conditions refer to the standard temperature and pressure. Pressure values at 1 atmosphere and temperature at 0 ° C are used and are reference values for gases. And in these conditions 1 mole of any gas occupies an approximate volume of 22.4 liters.
Then we can apply the following rule of three: if by definition of STP 1 mole occupies 22.4 L, 0.31 moles how much volume will it occupy?
[tex]volume=\frac{0.31 moles*22.4 L}{1 mole}[/tex]
volume= 6.944 L
6.944 liters of O₂ at STP will react with 8.7 grams of C₂H₄ to form CO₂ and H₂O.
The volume of O₂ at STP that will react with the given C₂H₄ is 20.8 L
First, we will determine the number of moles of O₂ required.
From the given balanced chemical equation,
C₂H₄ + 3O₂ → 2CO₂ + 2H₂O
This means
1 mole of C₂H₄ is required to react completely with 3 moles of O₂
Now, we will determine the number of moles of C₂H₄ present
Mass of C₂H₄ = 8.7 g
Using the formula
[tex]Number\ of\ moles = \frac{Mass}{Molar\ mass}[/tex]
Molar mass of C₂H₄ = 28.05 g/mol
∴ Number of moles of C₂H₄ = [tex]\frac{8.7}{28.05}[/tex]
Number of moles of C₂H₄ = 0.31016 mole
Since
1 mole of C₂H₄ is required to react completely with 3 moles of O₂
Then,
0.31016 mole of C₂H₄ will react completely with 3 × 0.31016 mole of O₂
3 × 0.31016 = 0.9305 mole
∴ Number of moles of O₂ required is 0.9305 mole
Now, for the volume of O₂ at STP that will react
Since 1 mole of a gas occupies 22.4 L at STP
Then,
0.9305 mole of O₂ will occupy 0.9305 × 22.4 L at STP
0.9305 × 22.4 = 20.8432 L
≅ 20.8 L
Hence, the volume of O₂ at STP that will react with the given C₂H₄ is 20.8 L
Learn more here: https://brainly.com/question/15209655
- Is energy absorbed or released by a material during the phase change from a solid to a liquid?
A)Absorbed
B)Released
Answer:
A) Abosrbed
Explanation:
The change is endothermic, meaning the material absorbs energy when it changes its phase from a solid to a liqiud.
Can someone help
Me out pls if your good at chemistry
PLEASE HELP, dana wants...
Answer:
C
Explanation:
Answer:
I think A, not sure
Explanation:
her weight depends on the force of gravity
HELPPPPPPPPPP
IDENTIFY THE ELEMENT WHICH HAS A GREATER ATOMIC MASS FLOURINE OR CLOURINE
Answer:
Cu Copper 63.546
Cl Chlorine 35.453
F Fluorine 18.998403
Explanation:
I don't know whether you asked for Cu or Cl so answered it both.
How many grams of zinc chloride will be produced from 55. grams of zinc assuming hydrochloric acid is available in excess
Answer:
Mass = 114.5 g
Explanation:
Given data:
Mass of zinc = 55 g
Mass of ZnCl₂ produced = ?
Solution:
Chemical equation:
Zn + 2HCl → ZnCl₂ + H₂
Number of moles of Zn:
Number of moles = mass/molar mass
Molar mass of Zn = 65.4 g/mol
Number of moles = 55 g/ 65.4 g/mol
Number of moles = 0.84 mol
Now we will compare the moles of Zn and zinc chloride,
Zn : ZnCl₂
1 : 1
0.84 : 0.84
Mass of ZnCl₂:
Mass = number of moles × molar mass
Molar mass of ZnCl₂= 136.3 g/mol
Mass = 0.84 mol × 136.3 g/mol
Mass = 114.5 g
What type of system is impacting weather in Houston?
A) High pressure
B) Low pressure
C) Warm pressure
D) Cold pressure
Answer:
a) high pressure
that is the answer i got, but wait for a few more answers before you write the answer
Which section of the ocean floor is near the coastline of all continents?
Answer shallow ocean
Explanation:
i think
what volume (in L) of ethane (C2H6) will be required to produce 42.5 L of carbon dioxide in the reaction below?
2C2H6(g)+7O2(g)->4CO2(g)+6H2O(g)
Answer:
21.25
Explanation:
A sample of carbon dioxide gas at a pressure of 891 mm Hg and a temperature of 84 C occupies a volume of 5.61 L. If the gas is cooled at constant pressure to a temperature of 40 C, the volume of the gas will be __ L.
Answer:
4.92L
Explanation:
Given parameters:
Initial pressure = 891mmHg
Initial temperature = 84°C = 84 + 273 = 357k
Initial volume = 5.61L
New temperature = 40°C = 273 + 40 = 313k
Unknown:
New volume = ?
Solution:
Since we are dealing with constant pressure condition, we apply charles's law.
It states that the volume of a fixed mass of gas varies directly as its absolute temperature if the pressure is constant.
Mathematically ;
[tex]\frac{V1}{T1}[/tex] = [tex]\frac{V2}{T2}[/tex]
V1 is the initial volume V2 is the new volume
T1 is the initial temperature T2 is the new temperature
[tex]\frac{5.61}{357}[/tex] = [tex]\frac{V2}{313}[/tex]
V2 = 4.92L
A compound whose empirical formula is NO₂ could have a molecular mass of? 23 g/mol 39 g/mol 92 g/mol 120 g/mol
The molecular formula of a compound gives the actual number of atoms of various elements present in one molecule of the compound. The molecular mass is 92 g/mol. The correct option is C.
What is empirical formula?The empirical formula of a compound can be defined as the formula which gives the simplest whole number ratio of atoms of various elements present in one molecule of the compound.
The molecular formula of a compound is a whole number multiple of its empirical formula.
Molecular formula = n × Empirical formula
The value of 'n' can be obtained from the relation:
n = Molecular mass / Empirical formula mass
Here the value of n = 2. Then,
Molecular mass = n × Empirical formula mass
Empirical formula mass of NO₂ = 45.8 g
2 × 45.8 = 91.6 ≈ 92 g/mol
Thus the correct option is C.
To know more about empirical formula, visit;
https://brainly.com/question/14044066
#SPJ7
I neeeeeeeeed help you within 30 min
Answer:
The answers to your question are given below
Explanation:
The equation for the reaction is given below:
2KClO₃ —> 2KCl + 3O₂
The total number of each atoms present in the reactants and products can be obtained by doing a head count as illustrated below:
Reactants >>>>>> Number of atoms
Potassium (K) >>> 2 × 1 = 2
Chlorine (Cl) >>>> 2 × 1 = 2
Oxygen (O) >>>>> 2 × 3 = 6
Products >>>>>>> Number of atoms
Potassium (K) >>> 2 × 1 = 2
Chlorine (Cl) >>>> 2 × 1 = 2
Oxygen (O) >>>>> 3 × 2 = 6
Please help I’ll put u Brainlyiest.
Answer:
it should be the stamen but to be sure look up the structure of a flower
If you have 8.5 moles of water (H2O), how many grams of water do you have?
Answer: i think it is 144.16
Explanation:
How many grams of K2Cr2O7, are soluble in 100 g of
water at 95 °C?
Answer:
75 grams
Explanation:
At 95 °C, you can dissolve up to 75 grams of K2Cr2O7 in 100 mL of water.
What is solubility?The solubility of a substance in a particular solvent is the maximum amount of that substance that can dissolve in the solvent at a given temperature. The solubility of a substance can be affected by factors such as temperature, pressure, and the presence of other substances.
For K2Cr2O7, the solubility in water is highly dependent on temperature. At 95 °C, the solubility of K2Cr2O7 in water is approximately 75 g/100 mL. This means that at 95 °C, you can dissolve up to 75 grams of K2Cr2O7 in 100 mL of water. Since 100 g of water is equivalent to 100 mL, you can dissolve up to 75 grams of K2Cr2O7 in 100 g of water at 95 °C.
Learn more about solubility, here:
https://brainly.com/question/28170449
#SPJ2
What happens to hydrogen during hydrogen bonding?
The proton spends a lot of time away from hydrogen and hydrogen's electron is exposed for
interaction
The electron spends a lot of time away from hydrogen and hydrogen's electron is exposed for
interaction
The electron spends a lot of time away from hydrogen and hydrogen's nucleus is exposed for
interaction
The proton spends a lot of time away from hydrogen and hydrogen's nucleus is exposed for
interaction
Answer:
The electron spends a lot of time away from hydrogen and hydrogen's nucleus is exposed for
interaction
Explanation:
I got the question right
During hydrogen bonding, The electron of hydrogen spends a lot of time away from hydrogen and hydrogen's nucleus is exposed for interaction. Option C is correct.
The presence of hydrogen atoms bound to strongly electronegative elements like nitrogen, oxygen, or fluorine as well as the polarity of the molecule determine whether hydrogen bonds are present in the molecule.
The electron density in the bond between a hydrogen atom and one of these electronegative atoms shifts in favor of the electronegative atom, giving rise to a partial positive charge on the hydrogen atom and a partial negative charge on the electronegative atom. Therefore, the hydrogen atoms in one molecule can establish hydrogen bonds with the electronegative atoms in other molecules.
To know more about hydrogen bonding here
brainly.com/question/17659933
#SPJ2
The question should be
What happens to hydrogen during hydrogen bonding?
a)The proton spends a lot of time away from hydrogen and hydrogen's electron is exposed for interaction
b)The electron spends a lot of time away from hydrogen and hydrogen's electron is exposed for interaction
c)The electron spends a lot of time away from hydrogen and hydrogen's nucleus is exposed for interaction
d) The proton spends a lot of time away from hydrogen and hydrogen's nucleus is exposed for interaction
Is luster a chemical or physical change? (Worth 50 POINTS!)
Answer:
It is a Physical change, have a great day :)
Explanation:
A chemical change is a permanent change. A Physical change affects only physical properties i.e. shape, size, etc. ... Some examples of physical change are freezing of water, melting of wax, boiling of water, etc. A few examples of chemical change are digestion of food, burning of coal, rusting, etc.
Apollo 11 made a ______ landing.
Answer:
Apollo 11 made a capsule landing
Explanation:
Answer: i don’t know what type of landing you mean
Explanation:
They did a lunar landing then reentry and then capsule landing.
help me please!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Which products would form if chlorine gas was bubbled through a solution of sodium bromide?
a. Na and BrCl
b. Na snd BrCl2
c. Na and Br2
d. Na(cl)2 and Br2
Answer:
NaCl and Br2
Explanation:
Edge 2020
Answer:
The Answer is C: Na and Br3
Explanation:
Increasing the temperature of a given amount of gas at constant volume causes the pressure to increase because _____. there is less space where the molecules can move around there are more molecules the molecules are striking a larger area with less force the molecules are moving more quickly
Answer:
the molecules are moving more quickly
Explanation:
The relationship between temperature and pressure is explained using the kinetic theory of matter.
As the temperature of the gas is increased, the molecules have a greater kinetic energy. This increased energy of the gas molecules make the collision between the molecules and with the walls of the container more rapid.
The correct option is;
the molecules are moving more quickly
What is a disadvantage of geothermal energy
Answer:
it runs the risk of triggering earthquakes. releases harmful gases
You have a particle of length 68 nm. What is this in meters? ( need help asap)
Answer:
B
Explanation:
pls answer i need it now!! I will give brainliest to the best answer!!
Answer:
sample 2
Explanation:
hope this helps
Sally is building a list of the types of matter that have energy. She includes liquids on her list because she can see that liquids flow. Is her list complete?
a. yes, her list with just liquids on it is complete
b. no, she should add only gases to her list
c. no, she should add only solids to her list
d. no, she should add gases and solids to her list
Answer:
I just looked up the types of matter energy has.
Explanation:
I believe the answer is D.
Sally's list of matter that have energy is not complete as all the types of matter have energy as all matter have mass , and mass and energy are related, so she should have added gases and solids to her list.
What is matter?Matter in chemistry, is defined as any kind of substance that has mass and occupies space that means it has volume .Matter is composed up of atoms which may or not be of the same type.
Atoms are further made up of sub atomic particles which are the protons ,neutrons and the electrons .The matter can exist in various states such as solids, liquids and gases depending on the conditions of temperature and pressure.
The states of matter are inter convertible into each other by changing the parameters of temperature and pressure.
Learn more about matter,here:
https://brainly.com/question/13556931
#SPJ2
