Answer:
[CO] = 0.2064M
[Cl2] = 0.0074M
[COCl2] = 0.3876M
Explanation:
Based on the reaction, Kc at 1000K is:
Kc = 255.0 = [COCl2] / [CO] [Cl2]
Where [] are concentrations at equilibrium
As the reaction is 1:1, the concentrations at equilibrium are:
[CO] = 0.5940M - X
[Cl2] = 0.3950M - X
[COCl2] = X
Where X is reaction coordinate
Replacing:
255.0 = [X] / [0.5940 - X] [0.3950 - X]
255.0 = X / 0.23463 - 0.989 X + X²
59.8307 - 252.195 X + 255 X² = X
59.8307 - 253.195 X + 255 X² = 0
Solving for X:
X = 0.605M. False solution because produce negative answers
X = 0.3876M. Right solution.
Replacing:
[CO] = 0.5940M - 0.3876M
[Cl2] = 0.3950M - 0.3876M
[COCl2] = 0.3876M
[CO] = 0.2064M
[Cl2] = 0.0074M
[COCl2] = 0.3876M
The concentration at equilibrium of CO is 0.2064 M, [tex]\rm Cl_2[/tex] is 0.0074 M, and [tex]\rm COCl_2[/tex] is 0.3876 M.
The initial concentration of CO = 0.5940 M
[tex]\rm Cl_2[/tex] = 0.3950 M
At equilibrium,
Let the concentration of formed [tex]\rm COCl_2[/tex] = x
Concentration of CO = 0.5940 - x M
Concentration of [tex]\rm Cl_2[/tex] = 0.3950 - x M
[tex]\rm K_c[/tex] = 255
[tex]\rm K_c[/tex] = [tex]\rm \dfrac{[COCl_2]}{[CO]\;[Cl_2]}[/tex]
255 = [tex]\rm \dfrac{x}{[0.5940-x]\;[0.3950-x]}[/tex]
(151.47 - 255x) (100.727-255x) = x
15,256 - 65,025 [tex]\rm x^2[/tex] = x
0 = 65,025 [tex]\rm x^2[/tex] +x - 15,256
x = [tex]\rm\dfrac{-b\;\pm\;\sqrt{b^2\;-\;4ac} }{2a}[/tex]
a = 65,025
b = 1
c = -15,256
x = 0.38 M
Thus, the concentration at equilibrium of CO is 0.2064 M, [tex]\rm Cl_2[/tex] is 0.0074 M, and [tex]\rm COCl_2[/tex] is 0.3876 M.
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How many molecules are present in this sample
0.423 mol co
H2SO4 +HI → __ H2S+12 +H2O balance the equation
Answer:
H2SO4 + 8HI → H2S + 4I2 + 4H2O
X, Y, Z là ba axit cacboxylic đơn chức cùng dãy đồng đẳng (MX < MY < MZ), T là este tạo bởi X, Y, Z với một ancol no, ba chức, mạch hở E. Đốt cháy hoàn toàn 26,6 gam hỗn hợp M gồm X, Y, Z, T (trong đó Y và Z có cùng số mol) bằng lượng vừa đủ khí O2, thu được 22,4 lít CO2 (đktc) và 16,2 gam H2O. Mặt khác, đun nóng 26,6 gam M với lượng dư dung dịch AgNO3/NH3, sau khi các phản ứng xảy ra hoàn toàn thu được 21,6 gam Ag. Mặt khác, cho 13,3 gam M phản ứng hết với 400ml dung dịch NaOH 1M và đun nóng, thu được dung dịch N. Cô cạn dung dịch N thu được m
How does chemistry affect the food you eat?
A.
All food can be analyzed to determine what nutrients they contain.
B.
Some fruits and vegetables may be genetically modified to resist diseases.
C.
Food can be transported in containers that keep it at safe temperatures.
D.
Some meats may be vacuum sealed to preserve their freshness.
Answer:
A
Explanation:
Chlorine can be made by the electrolysis of sodium chloride solution. Calculate the mass of chlorine that can be formed from 50.0g of sodium chloride.???
Answer:29.9 or 30
Explanation:
Total, 30.38 grams of chlorine gas can be formed from 50.0 grams of sodium chloride through electrolysis.
To calculate the mass of chlorine that can be formed from 50.0g of sodium chloride (NaCl) through electrolysis, we need to consider the balanced chemical equation for the electrolysis of NaCl;
2 NaCl (aq) → 2 Na (s) + Cl₂ (g)
From the balanced equation, we can see that 2 moles of NaCl produce 1 mole of chlorine gas (Cl₂).
Convert given mass of sodium chloride to moles.
Molar mass of NaCl = 22.99 g/mol (Na) + 35.45 g/mol (Cl)
= 58.44 g/mol
Moles of NaCl = 50.0 g / 58.44 g/mol ≈ 0.856 mol
Calculate moles of chlorine gas formed.
From the balanced equation, 2 moles of NaCl produce 1 mole of Cl₂.
Moles of Cl₂ = 0.856 mol / 2 ≈ 0.428 mol
Convert the moles of chlorine gas to mass.
Molar mass of Cl₂ = 2 × 35.45 g/mol
= 70.90 g/mol
Mass of Cl₂ = 0.428 mol × 70.90 g/mol
≈ 30.38 g
So, approximately 30.38 grams of chlorine gas can be formed from 50.0 grams of sodium chloride through electrolysis.
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please answer this as quickly as possible
Explanation:
I. Because an explosion is a very fast exothermic reaction
ll. it depends on the it's particle size
What is the speed of a wave that has a frequency of 220 Hz and a wavelength
of 0.39 m?
A. 0.002 m/s
B. 564 m/s
C. 85.8 m/s
D. 0.01 m/s
Answer:
12d
Explanation:
Nombra cada uno de los siguientes hidrocarburos de acuerdo a las reglas de la IUPAC
Answer:
i) ciclobutano
ii) 3-etil-4-metil ciclopenteno
Explanation:
Toda la idea de la nomenclatura IUPAC es permitir que la estructura de la sustancia se derive de su nombre y viceversa.
La nomenclatura IUPAC es un sistema universalmente aceptado para nombrar compuestos químicos.
los nombres de los compuestos enumerados son;
i) ciclobutano
ii) 3-etil-4-metil ciclopenteno
un estudiante introduce un corcho cuya densidad es 0.95 g/cm en cada uno de los liquidos que figura representa mejor la situacion
Answer:
La respuesta correcta es la opción A.
Explicación:
La densidad del corcho es 0.95g / cm3 por lo que se hundirá en la solución de acetona porque el corcho es más denso que la solución de acetona mientras que por otro lado, el corcho flotará en otros dos líquidos porque la densidad del corcho es menor que en otros dos líquidos o, en otras palabras, los dos líquidos son más densos que el corcho, por eso el corcho flotará en estos dos líquidos.
Please help me guys to solve this problem!
(a) distance measured with metre rule or tape rule
time measured with stopwatch/ stop clock/ timer
Average speed = total distance / time
(b) (i) decrease in speed
(ii) Change in speed = a * t
4.5 m/s
hope this helps......
Read temprature on thermometer i am confusion
Answer:
a)22.2°C after adding magnesium
b)17.3°C before adding magnesium
c) 4.9 is change
A gas has a pressure of 2.36 kPa at 62 °C. What is the pressure at standard
temperature?
Answer:
P2 = 1.94 kPa
Explanation:
Given the following data;
Initial pressure = 2.36 kPa
Initial temperature = 62°C
Standard temperature = 0°C
Conversion:
Kelvin = 273 + C
Kelvin = 273 + 62 = 335 K
Kelvin = 273 + 0 = 273 K
To find the final pressure, we would use Gay Lussac's law;
Gay Lussac states that when the volume of an ideal gas is kept constant, the pressure of the gas is directly proportional to the absolute temperature of the gas.
Mathematically, Gay Lussac's law is given by;
[tex] PT = K[/tex]
[tex] \frac{P1}{T1} = \frac{P2}{T2}[/tex]
Making P2 as the subject formula, we have;
[tex] P_{2}= \frac{P1}{T1} * T_{2}[/tex]
[tex] P_{2}= \frac{2.36}{335} * 273 [/tex]
[tex] P_{2}= 0.0071 * 273 [/tex]
P2 = 1.94 kPa
El Niño begins with which of the following?
Answer:
El Niño is a climate cycle in the Pacific Ocean with a global impact on weather patterns. The cycle begins when warm water in the western tropical Pacific Ocean shifts eastward along the equator toward the coast of South America. Normally, these warm water pools near Indonesia and the Philippines.
Explanation:
is silicone malleable or brittle
Answer:
Luster: Silicon for example appears lustrous, but is not malleable or ductile (it is brittle - a characteristic of some nonmetals). It is a much poorer conductor of heat and electricity than the metals.8 May 2021
Elements: Oxygen; Carbon
Explanation:
hope it helps
A 125 mL sample of phosphoric acid was titrated with an average of 63.7 mL of a 0.050M barium hydroxide solution according to the given reaction: 2 H3PO4 + 3 Ba(OH)2 ⇌ Ba3(PO4)2 + 6 H2O Determine the concentration of the phosphoric acid sample:
Answer:
0.017 M
Explanation:
The balanced equation for the reaction is given below:
2H₃PO₄ + 3Ba(OH)₂ ⇌ Ba₃(PO₄)₂ + 6H₂O
From the balanced equation above,
The mole ratio of acid, H₃PO₄ (nₐ) = 2
The mole ratio of base, Ba(OH)₂ (n₆) = 3
Finally, we shall determine the concentration of the phosphoric acid, H₃PO₄. This can be obtained as follow:
Volume of acid, H₃PO₄ (Vₐ) = 125 mL
Volume of base, Ba(OH)₂ (V₆) = 63.7 mL
Concentration of base, Ba(OH)₂ (C₆) = 0.050M
Concentration of acid, H₃PO₄ (Cₐ) =?
CₐVₐ / C₆V₆ = nₐ/n₆
Cₐ × 125 / 0.05 × 63.7 = 2/3
Cₐ × 125 / 3.185 = 2/3
Cross multiply
Cₐ × 125 × 3 = 3.185 × 2
Cₐ × 375 = 6.37
Divide both side by 375
Cₐ = 6.37 / 375
Cₐ = 0.017 M
Thus, the concentration of the phosphoric acid, H₃PO₄ is 0.017 M
If oxygen has 6 valence electrons how many it would like to gain to have full valence shell? And what charge will it give to oxygen ion?
Answer:
Gain 2, and become negatively charged
Explanation:
A full valence shell, thus stablilized, has 8 electrons, and so it would need two more, and when atoms gain electrons, they become negatively charged because there are now more electrons than protons (and so, when they lose electrons, they become positively charged). Hope this helps! :)
2. Evaluate :
(i) 28 : 23
Answer:
28/23
Explanation:
28 : 23
this is written as ,
28/23
u can convert into simplest form but in this question u can't so leave it as it is.
Fig. 6.1 shows the structural formula of an organic compound.
Fig. 6.1 (a) Name any two functional groups presents in the compound. (b) Give the structure of the organic product formed when the compound is reacted with Brz in an inert solvent, (ii) hot concentrated KMnO4, Na solid, (iv) CH3COCI benzenediazonium salt. (c) State the observations made in each of the reactions in each reaction in b
Answer:
A dono wat is da anser sori man hehe
Answer:
(a).
→ Hydroxyl group.
→ Carbon-carbon double bond. ( alkene )
→ Esters.
(c).
(I). A colourless solution : with bromine atoms on cyclo hexene.
or: A white precipitate due to bromine atoms formed on phenol.
(ii). The purple solution turns colourless due to oxidation of the cyclo hexene.
(iii).
Bubbles of a colourless gas ( hydrogen gas ) formed when sodium reacts with the hydroxyl group to form Sodium oate ions.
(iv). Am not sure about my answer.
(v).
A red dye is formed. ( and azo dye is formed due to benzenediazonium salt reacting with phenol ).
Iron pieces can be separated from sand using
Answer:
A Magnet or Magnetic Filtration
Answer:
Magnetic Filtration
Explanation:
That is the answer
How does an indicator show the difference between an acid and an alkali?
Explanation:
When a base dissolves in water it is an alkali and makes an alkaline solution.
...
Litmus.
Red Litmus Blue Litmus
Acidic solution Stays red Turns red
Neutral solution Stays red Stays blue
Alkaline solution Turns blue Stays blue
Why do we need to know these organic molecules?
Are they important to living things?
Answer:
Organic molecules are important to living things because life is based on the properties of carbon.
Properties of Carbon
Carbon is an important element because it can form four covalent bonds.
Carbon skeletons can vary in length, branching, and ring structure.
The carbon skeletons contain the functional groups that are involved in biochemical
Explanation:
Hope it helps
What does botanist study? A. Boats
B.Matter
C. chemicals
D. Plants
What does botanist study?
[tex]\implies {\blue {\boxed {\boxed {\purple {\sf {D.\: Plants}}}}}}[/tex]
[tex]\bold{ \green{ \star{ \orange{Hope\:it\:helps.}}}}⋆[/tex]
Pottery and china are suitable for making tea pots because they are:
brittle.
transparent
heat insulators.
non-conductors of electricity.
Quick help me
Answer:
non-conductors of electricity.
Explanation:
One of the auxiliary pleasures of drinking tea is selecting accoutrements: utensils, cups, kettles, storage tins, and, of course, teapots. The choices are legion with a dazzling array of shapes, sizes, decorative touches. Sometimes that blinds us to one of the most important decisions we must make in teapot selection: its function!
One of the auxiliary pleasures of drinking tea is selecting accoutrements: utensils, cups, kettles, storage tins, and, of course, teapots. The choices are legion with a dazzling array of shapes, sizes, decorative touches. Sometimes that blinds us to one of the most important decisions we must make in teapot selection: its function!Your teapot-buying decision should be based first and foremost on size (options often go from one to six cups, sometimes larger). The next most important aspects are your personal preference for material (glass, ceramic or porcelain) and whether it will be used for brewing tea or pouring brewed tea. Other important factors include: whether it's easy to hold, pours well, and, of course, fits into your budget. A gigantic Majolica pot, festooned with monkeys and in a brilliant highly-glazed green, may warm your heart; but if when filled with tea it weighs five pounds and holds more than your family can drink, it will probably be better suited for the collector�s shelf than the tea table.
brainly me pls
PLEASE HELP!
need answers to a and b !
thank you!
a) The genotype is Hh. We simply combine the two given letters together to get this genotype.
b) The phenotype is Widow's peak. The uppercase letter is the dominant allele, while the lowercase is recessive. Any presence of the dominant allele (even a single letter) will mean the dominant phenotype will present itself. We can see that HH leads to Widow's peak phenotype, so that applies to Hh as well. Only when there isn't a dominant allele at all, the genotype hh, is when the recessive phenotype will show up.
Blue litmus paper is used to determine the acidity of a compound. When litmus paper detects hydrogen ions (H+), the paper turns red. Which solution will leave the blue litmus unchanged in color? hydrochloric acid (HCI) hydrobromic acid (HBr) B C sodium hydroxide (NaOH) sodium chloride salt (NaCl)
A. Hydrochloric acid (HCI)
B. Hydrobromic acid (HBr)
C. sodium hydroxide (NaOH)
D. sodium chloride (NaCI)
Answer:
Bases Do not Change the Color of Blue Litmus.
I'd go with Option C.
Sodium Hydroxide.
17. (1.09 x 102) x (2.79 x 10')
18. (5.75 x 104) / (4.71 102)
19.(3.38 x 106) x (7.80 x 104)
20. (7.04 x 10) / (9.45 x 10-)
Answer:
17. 3,101.922
18. 1.2447441822
19. 288,057.12
20. 0.74497354
A boulder rests on a ledge 31.2 m above a lake. If it has 2.65 x 10 J of gravitational
potential energy relative to the lake surface, what is the mass of the boulder?
Answer:
This question is incomplete, the gravitational potential energy is 2.65 x 10^5 J
mass of the boulder = 866.7g
Explanation:
Potential energy (P.E) refers to the energy due to the position of a body. It can be calculated as follows:
P.E = m × g × h
Where;
m = mass of substance (g)
g = acceleration due to gravity (m/s²)
h = height (m)
According to the information provided in this question,
h = 31.2 m
g = 9.8m/s²
m = ?
P.E = 2.65 x 10^5 J
Using P.E = m × g × h
2.65 x 10^5 = m × 9.8 × 31.2
2.65 x 10^5 = 305.76m
265000 = 305.76m
m = 265000 ÷ 305.76
m = 866.69
mass of the boulder = 866.7g
types of molecular forces
Answer:
Hydrogen bonds
Covalent bonds
Van Der Walls Forces
Ionic Bonding
London Dispersion forces
Metallic bonding
Chemical bonds
I have oxygen gas at 2 L and 2 atm. At what pressure is the oxygen gas if my volume decreases to 1 L?
Answer: The oxygen gas has a pressure of 4 atm if my volume decreases to 1 L.
Explanation:
Given: [tex]V_{1}[/tex] = 2 L, [tex]P_{1}[/tex] = 2 atm
[tex]V_{2}[/tex] = 1 L, [tex]P_{2}[/tex] = ?
Formula used to calculate the new pressure is as follows.
[tex]P_{1}V_{1} = P_{2}V_{2}[/tex]
Substitute the values into above formula as follows.
[tex]P_{1}V_{1} = P_{2}V_{2}\\2 atm \times 2 L = P_{2} \times 1 L\\P_{2} = 4 atm[/tex]
Thus, we can conclude that the oxygen gas has a pressure of 4 atm if my volume decreases to 1 L.
Please tell me the answer
Answer:
the pair of isotopes are b and e
the element with mass no of 19 is C
the element with atomic no 7is D
Explanation:
B and E are isotopes bcos they have the same atomic no, i.e no of protons. They bother have atomic no of 17 BUT have different mass no i.e sum of neutrons and protons.
(b)C is correct because the sum of the protons and neutrons is 19
(c) D because it has 7 protons