The Russian Mir space station used a chemical oxygen generator system to make oxygen for the crew. The system ignited a tube of solid lithium perchlorate (LiClO4) to make oxygen and lithium chloride (LiCl): LiClO4 (s) 2O2 (g) + LiCl (s) If you have 300 g of LiClO4, then… (a) How many moles of oxygen gas will be generated?
(b) The station’s standard operating conditions are a pressure of 101.5 kPa and a temperature of 21°C. Based on this information and your answer to part (a), how many liters of oxygen gas will be generated? (Show your work.)
Answers
300 g of LiClO₄ produce 5.64 moles of O₂, which is equivalent to 136 L of O₂ at 101.5 kPa and 21 °C.
Let's consider the following balanced equation.
LiClO₄(s) ⇒ 2 O₂(g) + LiCl(s)
We can calculate the moles of O₂ produced from 300 g of LiClO₄ using the following relationships.
The molar mass of LiClO₄ is 106.39 g/mol.The molar ratio of LiClO₄ to O₂ is 1:2.[tex]300 g LiClO_4 \times \frac{1molLiClO_4}{106.39gLiClO_4} \times \frac{2molO_2}{1molLiClO_4} = 5.64molO_2[/tex]
Then, we will convert 101.5 kPa to atm using the conversion factor 1 atm = 101.325 kPa.
[tex]101.5 kPa \times \frac{1 atm}{101.325kPa} = 1.002atm[/tex]
Next, we will convert 21 °C to Kelvin using the following expression.
[tex]K = \° C + 273.15 = 21\° C + 273.15 = 294 K[/tex]
Finally, we will calculate the volume occupied by 5.64 moles of oxygen using the ideal gas equation.
[tex]P \times V = n \times R \times T\\\\V = \frac{n \times R \times T}{P} = \frac{5.64 mol \times (\frac{0.082atm.L}{mol.K} ) \times 294K}{1.002atm} = 136 L[/tex]
300 g of LiClO₄ produce 5.64 moles of O₂, which is equivalent to 136 L of O₂ at 101.5 kPa and 21 °C.
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Related Questions
Identify the labeled structures. A: B: B C: < A D: ✓ > E: D AVIS Det E с
please I need your help and fast so as soon as you seen this answer please I will list brainlyist
Answers
Answer:
ahhh i d kkkkk im so so so so sorry
Explanation:
what happens to a circuits resistance (R), voltage (V), and current (I) when you increase the diameter of the wire in the circuit?
a. R increases, V is constant, I increases
b. R decreases, V is constant, I increases
c. R decreases, V increases, I increases
d. R increases, V decreases, I decreases
Answers
Answer:
b. R decreases, V is constant, I increases
Explanation:
when we increase the diameter of wire increases ,resistance decreases and current increases.Therefore, the option is b.
Resistance is an electrical quantity which opposes the electric current in the circuit. Resistance is directly proportional to the length of the wire and inversely proportional to the diameter of the wire. If length of wire increases resistance will increases and if the diameter of the wire increase resistance will decreases.
R = ρ L/A
Here ρ is the resistivity
L is the length of the wire
A is the cross-sectional area of wire/diameter of the wire
Voltage is the potential difference between two terminals of voltage source. Current is the flow of electrons in the circuit. Voltage is the product of current and resistance.
V=IR
Rewrite the above equation interms of current
I=V/R
From the above equation we can say that current is inversly proportional to the resistance.Therefore,the correct option is b.
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MASTERING CONCEPTS
31. List three examples of substances. Explain why each
is a substance.
Answers
Answer:
vc
Explanation:
cvcv
Hi. Please tell me When you test starch with Barfoed’s reagent, what would be the answer, positive or negative? Explain the answer by giving reasons and structures.
Answers
State TRUE or FALSE : Nutrients are not necessary for the functioning of our body
Answers
Answer:
False
Explanation:
Nutrients are so important to our health.Nutrients are compounds in foods essential to life and health, providing us with energy, the building blocks for repair and growth and substances necessary to regulate chemical processes.
The RDI for sodium for adults is 2300mg. What amount of table salt (in grams) contains this quantity of sodium? Express answer to two significant figures and include the appropriate units.
Answers
Answer:
hihihihhihihihihiihihihihiihihihih
Please explain this and give answers
Answers
Answer:
a) 2Ba + O2 → 2BaO
b) 2HCl + Mg → MgCl2 + H2
c) 2HCl + CuO → CuCl2 + H2O
d) Fe + O2 → Fe2O3
Explanation:
Okay so for
a), you must add 2 at the front of Ba and BaO bcuz you're gonna need your equation balanced.
like as you can see, O has 2 so yeahh, you've got to balance it nicely.
b) you must add 2 in front of HCl bcuz the Cl and H after the reaction happened has 2 in them, were talking about balancing so XD
c) and yes again, you're gonna have to add 2 in front of HCl bcuz of the same reason as b).
d) D is definitely a special case bcuz, Fe3+ with O2, so well if you do the cross multiplication technique you'll automatically get Fe2O3. Yas that's it.
English is not my first language so it's hella tuff to explain it to you from in much more detailed perspective T-T Sorry (´∩｡• ᵕ •｡∩`)
help pleaseeeeeeeeeeeeeeeeeeeeeeeeeeeeee
Answers
Answer:
evaporation
Explanation:
An example of this is when puddles evaporate into the air after it has rained. Condensation is the opposite: gas → liquid
Hope this helps!
please help n let me know thank u
Answers
Calculate the number of Calories in a 5 fluid oz glass of red wine that contains 2.1 g carbohydrate and 13.8 g alcohol.
Answers
Answer:
ù
Explanation:
What are the 26 states of matter?
Bose–Einstein condensate.
Fermionic condensate.
Degenerate matter.
Quantum Hall.
Rydberg matter.
Rydberg polaron.
Strange matter.
Superfluid
In this case, the amount of calories is 105 calories.
One gram of alcohol provides approx. 7 calories, whereas one gram of carbohydrates contains 4 calories.In this case, the number of calories can be calculated by summing the calories provided by alcohol and carbohydrates.Number of calories = (2.1g x 4) + (13.8g x 7) = 8.4 + 96.6 = 105 calIn conclusion, the amount of calories, in this case, is 105 calories.
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When two liquids are mixed, they begin to fizz, this is an example of a __1__ change. You know this because __2__.
Answers
Answer:
1.chemical change 2, when two chemicals are mixed they have mix two chemcials into one liquid
Explanation:
A 3.90 L sealed vessel under vacuum is filled with 6.40 g of fluorine gas. What is the pressure (in kPa) of the vessel at 25.0 ⁰C ?
Answers
From the ideal gas law, the pressure of the gas is 106 kPa.
First we must obtain the number of moles of the gas;
Number of moles = mass/molar mass
Molar mass of fluorine gas = 38 g/mol
Number of moles of F2 = 6.40 g/38 g/mol = 0.168 moles
Using the ideal gas equation;
PV = nRT
P = ?
V = 3.90 L
n = 0.168 moles
T = 25.0 ⁰C + 273 = 296 K
R = 8.314 kPa L K-1 mol-1
Substituting values;
P = nRT/V
P = 0.168 moles × 8.314 kPa L K-1 mol-1 × 296 K/3.90 L
P = 106 kPa
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The pressure of the vessel at a temperature of 25 °C is 106.73 KPa
We'll begin by calculating the number of mole of fluorine gas. This can be obtained as follow:
Mass of F₂ = 6.40 g
Molar mass of F₂ = 19 × 2 = 38 g/mol
Mole of F₂ =?Mole = mass / molar mass
Mole of F₂ = 6.40 / 38
Mole of F₂ = 0.168 moleFinally, we shall determine the pressure. This can be obtained as follow:
Volume (V) = 3.90 L
Temperature (T) = 25.0 °C = 25 + 273 = 298 K
Mole of F₂ (n) = 0.168 mole
Gas constant (R) = 8.314 L.KPa/Kmol
Pressure (P) =?PV = nRT
P × 3.9 = 0.168 × 8.314 × 298
P × 3.9 = 416.232096
Divide both side by 3.90
P = 416.232096 / 3.90
P = 106.73 KPaTherefore, the pressure of the vessel is 106.73 KPa
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On vacation, Aria went scuba diving in the Pacific Ocean for the very first time. She rose toward the surface of the water at a steady speed for 4 minutes. She rose 36 meters in that time. What was her speed? HELP ME ASAP!!!!!!!!!!!!!
Answers
Aria speed during scuba diving was 0.15 m/s.
Speed is the ratio of the distance travelled to the time taken. Speed is given by:
Speed = distance / time
Given that the distance travelled was 36 meters and the time was 4 minutes, hence:
Time = 4 minutes × 60 seconds per minute = 240 seconds
Speed = 36 m / 240 s
Speed = 0.15 m/s
Therefore Aria speed during scuba diving was 0.15 m/s.
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Which is not a type of nuclear decay?
A. Zeta
B. Gamma
C. Alpha
D. Beta
Answers
Answer:
The answer is Zeta
Explanation:
The three types of nuclear decay are Gamma, Beta, and Alpha.
what is the resonance structure of ch3
Answers
Answer:
For the CH3- structure use the periodic table to find the total number of valence electrons for the CH3- molecule. Once we know how many valence electrons there are in CH3- we can distribute them around the central atom with the goal of filling the outer shells of each atom.
In the Lewis structure of CH3- structure there are a total of 14 valence electrons.
Also note that you should put the CH3- Lewis structure in brackets with as 1- on the outside to show that it is an ion with a negative one charge.
----- Steps to Write Lewis Structure for compounds like CH3- -----
1. Find the total valence electrons for the CH3- molecule.
2. Put the least electronegative atom in the center. Note: Hydrogen (H) always goes outside.
3. Put two electrons between atoms to form a chemical bond.
4. Complete octets on outside atoms.
5. If central atom does not have an octet, move electrons from outer atoms to form double or triple bonds.
Lewis Structures, also called Electron Dot Structures, are important to learn because they help us understand how atoms and electrons are arranged in a molecule. This can help us determine the molecular geometry, how the molecule might react with other molecules, and some of the physical properties of the molecule (like boiling point and surface tension).
Explanation:
CH3CNO can be represented by at least three different but valid Lewis structures called resonance forms, or resonance structures, shown below.
which of the following is not true for chemical change
Answers
Answer:
"They can be reversed by physical changes."
Explanation:
A chemical change can form a new substance, can be detected by the change in color and they have properties different from their starting materials.
In this experiment you are directed to add a limited amount of NaOH (aq) and then an excess amount. A similar strategy will be used with the addition of NH3(aq). Why? Group of answer choices Both NaOH and NH3 are weak bases. Both NaOH and NH3 are strong bases. Initially a metal hydroxide may form which becomes soluble when more base is added and the metal complex forms. Insoluble metal complexes are first formed which then are replaced by insoluble metal hydroxide precipitates. Initially a complex ion may form which becomes insoluble when more base is added and the metal hydroxide precipitate forms.
Answers
The reason for adding a limited amount and then an excess amount is that initially a metal hydroxide may form which becomes soluble when more base is added and the metal complex forms.
In qualitative analysis is a common to add the base in drops and then in excess. When added in drops, the metal hydroxide is formed. This metal hydroxide is often insoluble.
After this metal hydroxide is formed, the base could be added in excess such that the metal hydroxide dissolves in the excess base by forming a complex.
For instance;
CuCl2(aq) + 2NaOH(aq) -------> Cu(OH)2(s) + 2NaCl(aq)
Cu(OH)2(s) + 2OH^-(aq) -------> [Cu(OH)4]^2+(aq)
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helppppppppppppppppppppppppp
Answers
True
All matter is made up of atoms.
im guessing it probably true
What happens when the two atoms are fairly close?
Answers
Which statement describes the bonds in nitrate (NO3-)?
A) Nitrogen and oxygen have an electronegativity difference of 0.5, so the bond is polar covalent, with oxygen pulling the electrons toward it.
B) Nitrogen and oxygen have an electronegativity difference of 0.5, so the bond is nonpolar covalent.
C) Nitrogen and oxygen have an electronegativity difference of 0.5, so the bond is ionic.
D) Nitrogen and oxygen have an electronegativity difference of 0.5, so the bond is polar covalent, with nitrogen pulling the electrons toward it.
Answers
The bond in NO3- ion is polar covalent and oxygen pulls the electrons.
A polar covalent bond is formed when there is a significant difference in electronegativity between covalently bonded atoms.
Such bonds are said to be polar covalent with the electron density tilted towards one of the bonding atoms.
In NO3-, Nitrogen and oxygen have an electronegativity difference of 0.5, so the bond is polar covalent, with oxygen pulling the electrons toward it.
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The answer is A, Nitrogen and oxygen have an electronegativity of 0.5, so the bond is polar covalent, with oxygen pulling the electrons toward it.
Electronegativity is defined as, a value that describes the relative strength with which an atom of an element attracts electrons to itself in a chemical bond. Moreover, electronegativity can be used to define a bond.
A electronegativity of 0.5-1.7 is determined to be a polar covalent bond, thus the bonds in nitrate is polar covalent.
We know that electronegativity increases on the periodic table across a period, but decreases down a group. Thus, oxygen has a greater electronegativity than nitrogen.
WHAT IS THE COLOR OF METHYL ORANGE
1. YELLOW
2. PINK
3. ORANGE
Answers
Answer:
3.Orange it literally say's it methyl ORANGE
Explanation:
Brainliest plz
Answer:
Other indicators
Indicator Acidic Alkaline
Methyl orange Red Yellow
Phenolphthalein Colourless Pink
What part of the scientific method involves drawing inferences about experimental results and determining if the collected data support the original hypothesis?
Asking a question
Conducting research
Constructing a hypothesis
Drawing conclusions
Answers
Answer:
Drawing conclusions
Explanation:
Một chất phóng xạ có chu kỳ bán huỷ là 10 năm, Hỏi bao nhiêu năm thì lượng phóng xạcòn 10%. Cho biết phản ứng phân hủy chất phóng xạ là phản ứng bậc
Answers
Answer:
what
Explanation:
Please help me with this I’ll give you extra credit it’s due in 10 minutes thank youuu!!! :))
Answers
Answer:
Okay ask away. . . You haven't asked anything that we would be able to answer
does exercise increase, decrease or have no effect on the amount of carbon dioxide you exhale
Answers
Answer:
It increases the amount you exhale
Explanation:
The more you exercise and make your body work, the more oxygen you inhale which causes you to let out more carbon dioxide than if you were just resting.
Hydrocarbons are molecules that consist entirely of carbon and hydrogen atoms and are classified by their bond structure.
a. True
b. False
Answers
Answer:
true
Explanation:
hydrogen and carbon make hydrocarbons
Sodium, Na, is a metallic element.
Explain, with the aid of a labelled diagram, what is meant by the term metallic bonding.
Answers
Answer:
metallic bonding is the bond form between two or more metal elements or between metal element and the other group elements
how to do this question ? can anyone help me urgent
Answers
Answer:
7.50 and 50L
35atm
6.2atm
State TRUE or FALSE : Synthetic fibers resists fire.
Answers
All fabrics will burn, but some are more combustible than others.
hope it helps
Please tell me an example of a protein structure that would give positive test with Molisch’s Reagent?
Answers
Answer:
positive reaction for Molisch's test is given by almost all carbohydrates (exceptions include tetroses & trioses). It can be noted that even some glycoproteins and nucleic acids give positive results for this test (since they tend to undergo hydrolysis when exposed to strong mineral acids and form monosaccharides).
Answer:
glycoproteins
Explanation:
A positive reaction for Molisch's test is given by almost all carbohydrates (exceptions include tetroses & trioses). It can be noted that even some glycoproteins and nucleic acids give positive results for this test (since they tend to undergo hydrolysis when exposed to strong mineral acids and form monosaccharides).
