Calcium oxide is used to remove the pollutant SO2 from smokestack gases. The overall reaction is:
CaO(s)+SO2(g) +(1/2)O2 > CaSO4(s)
For this reaction, Kp = 2.38 × 10^15.
Consider a sample of gas that contains 475 moles of smokestack gas. How many molecules of SO2 are contained in this sample?
Answers
This problem is providing a chemical reaction reaction at equilibrium and its pressure-based equilibrium constant, and thus asks for molecules of SO2 at equilibrium. At the end, the answer turns out to be 1.25x10¹² molecules.
Chemical equilibriumIn chemistry, when chemical reactions take place, they do not necessarily go to completion, but can reach a constant-concentration point denominated "equilibrium" where the reaction does not proceed any longer.
In such a way, for the given reaction, one can write the equilibrium expression based on the law of mass action, which sets the products on top, reactants on bottom and ignores both solids and liquids:
\(Kp=\frac{1}{p_{SO_2}*p_{O_2}^{1/2}}\)
However, in order to calculate this, one needs the partial pressure of O2, defined in similar problems as 0.21 atm for us to find the partial pressure of SO2 first:
\(2.38x10^{15}=\frac{1}{p_{SO_2}*(0.21)^{1/2}}\\\\p_{SO_2}=\frac{1}{(2.38x10^{15})(0.21)^{1/2}}\\\\p_{SO_2}=9.17x10^{-16}atm\)
Keep in mind this 0.21 atm may vary depending on the problem you were given.
Thus, we obtain the mole fraction of SO2 as follows:
\(x_{SO_2}=\frac{9.17x10^{-16}atm}{9.17x10^{-16}atm+0.21atm}=4.37x10^{-15}\\ \\\)
Finally, we use this mole fraction to calculate the moles of SO2 in 475 moles of the gas mixture, and then use the Avogadro's number to calculate the molecules:
\(molecules=475mol*4.37x10^{-15}*\frac{6.022x10^{23}}{1mol} =1.25x10^{12}molecules\)
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Related Questions
Cuando viajo, me gusta comprar recuerdos.
to buy vacations
to buy tickets
to buy souvenirs
to buy postcards
Answers
Answer:
to buy souvenirs
give me big brain
Explanation:
Which of these statements is true of both endothermic and exothermic reactions?
Answers
if you reply with a link, I will report you
Answers
Answer:
1 2 2
Explanation:
Please help me do this
Answers
The total mass of the balloon and its content is 1521.17 g, the number of moles of CO₂ in the balloon is 34.15 mol, and the number of CO₂ molecules in the balloon is 2.06 x 10²⁵ molecules.
a) The molar mass of CO₂ is 44.01 g/mol. To find the total mass of the balloon and its content, we need to add the mass of the balloon (20g) to the mass of the CO₂ inside the balloon.
Mass of CO₂ = number of moles of CO₂ x molar mass of CO₂
Since the balloon is at STP (standard temperature and pressure), we can use the molar volume of a gas at STP (22.4 L/mol) to find the number of moles of CO₂ in the balloon:
Volume of CO₂ = Volume of balloon = 765 L (at STP)
Number of moles of CO₂ = volume of CO₂ / molar volume of a gas at STP
= 765 L / 22.4 L/mol
= 34.15 mol
Mass of CO₂ = 34.15 mol x 44.01 g/mol
= 1501.17 g
Total mass of balloon and its content = 20 g + 1501.17 g
= 1521.17 g
b) Number of moles of CO₂ in the balloon is 34.15 mol
c) To find the number of CO₂ molecules in the balloon, we need to use Avogadro's number (6.02 x 10²³ molecules/mol).
Number of CO₂ molecules = number of moles of CO₂ x Avogadro's number
= 34.15 mol x 6.02 x 10²³ molecules/mol
= 2.06 x 10²⁵ molecules
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Although an object's speed can vary while it moves, which speed listed is possible to calculate by
using total distance and total time?
A. average speed
B. total speed
C. initial speed
D. final speed
Answers
Hope this helps
2. The transfer of heat by direct contact. What kind of heat transfer is this an example of?
Answers
Answer:
The answer is Conduction
Explanation:
Conduction is the process of heat being transferred between objects through direct contact, and it's the most common type of heat transfer.
Answer:
The answer is Conduction
Explanation:
Conduction is the process of heat being transferred between objects through direct contact, and it's the most common type of heat transfer.
I hope this helps!
sulfuric acid is probably the most important industrial chemical because it is used in so many industrial processes to produce or purify other chemicals. it can be produced by a three step process. first, sulfur is burned in air to give sulfur dioxide. second, the sulfur dioxide is converted to sulfur trioxide by passing the sulfur dioxide over a catalyst in the presence of oxygen at a high temperature. third, the sulfur trioxide is reacted with water formed from 1.00 x 103 kg of sulfur, if the three steps gave yields as listed below? how much sulfuric acid can be made from 1.00 x 103 kg of sulfur.s o2 so2 92.5%2so2 o2 2so3 72.6%so3 h2o h2so4 98.2%
Answers
1.00 x 10^3 kg of sulfur can produce 661.94 kg of sulfuric acid.
To calculate the amount of sulfuric acid that can be made from 1.00 x 10^3 kg of sulfur:
First, the amount of sulfur dioxide produced from 1.00 x 10^3 kg of sulfur can be calculated:
1.00 x 10^3 kg x 92.5% = 925 kg of sulfur dioxide
Next, the amount of sulfur trioxide produced from the sulfur dioxide can be calculated:
925 kg x 72.6% = 673.67 kg of sulfur trioxide
Finally, the amount of sulfuric acid produced from the sulfur trioxide can be calculated:
673.67 kg x 98.2% = 661.94 kg of sulfuric acid
Therefore, 1.00 x 10^3 kg of sulfur can produce 661.94 kg of sulfuric acid.
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What volume of concentrated 15M H2SO4 is required to prepare 0.75 liters of a 6.0M solution?
Answers
Answer:
30 ml
Explanation:
Hydrogen reacts with oxygen according to the balanced equation
2H₂ (g) + O2(g) → 2H₂O(g). If X is the number of molecules of H₂ which react,
then the number of O2 molecules reacting is
Answers
Answer:
x/2
Explanation:
X = 2 molecules of H2
For 2 molecules of H2, there's only 1 molecule of O2. Meaning, there's twice the amount of H2, so O2 = x/2 molecules.
I hope I'm understanding this question right.
Daniella found an iron metal cube. The volume of the cube is 20 cm3 as shown below.
non
20.0 cm
If the density of iron is 7.9 g/cm3, what is the mass in grams of this iron cube?
A) 0.395 g
B) 2.53 g
C) 27.99
D) 158 g
Answers
Answer:b) 2.53
Explanation:
How did the instrument in the picture help to disprove part of Dalton's atomic model?
A)
It showed all matter is made of atoms and that atoms are indivisible and
indestructible.
B)
It showed that all atoms of a particular element are not identical.
C)
It showed that compounds are formed by a combination of two or more
different kinds of atoms.
D)
It showed that a chemical reaction is a rearrangement of atoms.
No
Answers
Answer:
It’s b;)
Explanation:
Answer:
B is correct
Explanation:
Why is boiling water a physical change
Answers
Answer:
it is cleaning the water and heating it
Answer:
When boiling the water, the water will begin to evaporate and thats the physical change.
A 25 ml sample of 1.2 molar potassium chloride mix with 15 ml of 0.90 molar barium nitrate solution and precipitate reaction occurs twice case LX + BA no3s aqueous bacl2 solid + 2ks what is the practical yield percentage yield mass is 2.45 g
Answers
theoretical yield) × 100%
Percentage yield = (2.45 g / 2.81 g) x
100%
Percentage yield = 87.2%
Therefore, the practical yield percentage yield is 87.2%, and the mass of the BaCI2 produced is 2.81 g.
Moles of KCI = volume (in L) X
concentration
Moles of KCI = (25/1000) L x 1.2 mol/L
= 0.03 mol
Moles of Ba(NO32 = volume (in L) X
concentration
Moles of Ba(NO3)2 = (15/1000) L x
0.90 mol/L = 0.0135 mol
Moles of BaCI2 formed = 0.0135 mol
The molar mass of BaCI2 is 208.23 g/ mol, so the mass of BaCI2 produced is:
Mass of BaCI2 = moles of BaC12 x
molar mass of BaCI2
Mass of BaCI2 = 0.0135 mol x 208.23
g/mol
Mass of BaCI2 = 2.81 g
When the North Pole of one magnet is next to another North Pole of the other manger they will repel. True or false
Answers
Hope this helps
of the atoms below,___is the least electronegative. options: a) si b) f c) ca d) cl e) rb
Answers
Of the atoms that are given, Rubidium is least electronegative among the other 5 options, hence option e) rb is the correct option.
Electronegativite nature is the tendency of an atom to attract electrons towards itself. As we move from left to right in a period electronegativity increases as we move from metals to non metals.The electronegativity of an atom changes depending on the hybridization of the orbital employed in bonding.
Compared to electrons in p orbitals, s orbital electrons are retained more firmly. As a result, when the hybrid orbital has more s character, a bond to an atom that uses a spx hybrid orbital for bonding will be more strongly polarized to that atom. In organic chemistry, different functional groups rather than specific atoms are more frequently related with electronegativity.
It is common to use the terms group electronegativity and substituent electronegativity interchangeably. The inductive effect and the resonance effect, which are referred to as σ- and π-electronegativities, respectively, are typically distinguished from one another.
Hence, option e) rb is correct option here.
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10 Points
The International Commission of Radiological Protection has set the limit for yearly radiation exposure at 1000 uSv. What is the risk
associated with this dose?
A. No risk at this limit or below.
OB. 1/2400 chance of cancer over a 40 year period.
OC. 1/1000 chance of cancer over a 40 year period.
OD. 1/100,000 chance of cancer over a 40 year period.
Answers
The maximum allowable annual dose of radiation has been set at 1000 uSv by the worldwide commission on radiological protection. At this threshold or lower, there is no risk.
What is S(sievert)?
The sievert, a measurement used to measure radiation, is used to calculate how much radiation is taken in by human tissues.1000 millisieverts are equal to one sievert (mSv) [ 1 Sv= 1000 mSv]. There are 1,000 microsieverts in a millisievert[ 1 mSv = 1000 uSv]Here are some details concerning the risks increasing radiation levels cause to our health:
Yukio Edano, Japan's Chief Cabinet Secretary, had said that radiation levels near the damaged facility on the northeast coast may rise to 400 millisieverts (mSv) per hour.The lowest dose of exposure that causes any rise in cancer probability is readily visible is 100 mSv per year. Five out of every 100 people exposed to a cumulative 1,000 mSv (1 sievert) may likely get a deadly malignancy several years later.The central nervous system, as well as the red and white blood cells, are destroyed by high radiation doses or acute radiation exposure. This impairs the immune system, making it difficult for the sufferer to fight off diseases.One sievert (1,000 mSv), for instance, only results in radiation sickness, which includes nausea, vomiting, and bleeding, but not death. About half of individuals exposed to a single dose of 5 sieverts would perish within a month.Therefore the correct choice is an option (A).
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Answer:
Answer D
Explanation:from founders Edtell :
A dose of 1000 uSv is believed to carry a 1/100,000 risk of getting cancer over 40 years due to your exposure to radiation. The average dose is around 2400 uSv.
Aerogel or "solid smoke" is a novel material that is made of silicon dioxide, like glass, but is a thousand times less dense than glass
because it is extremely porous. Material scientists at NASA's Jet Propulsion Laboratory created the lightest aerogel ever in 2002, with
a density of 0.00011 pounds per cubic inch. The material was used for thermal insulation in the 2003 Mars Exploration Rover. If the
maximum space for insulation in the spacecraft's hull was 2921 cm", what mass (in grams) did the aerogel insulation add to the
spacecraft?
Answers
The mass that the aerogel insulation added to the aircraft, with respect to glass, is 8.8 × 10³ g.
The density of the aerogel is 0.00011 lb/in³. We will convert it to g/cm³ using the following conversion factors:
1 lb = 454 g1 in³ = 16.4 cm³\(\frac{0.00011lb}{in^{3} } \times \frac{454g}{1lb} \times \frac{1in^{3} }{16.4cm^{3} } = 0.0030 g/cm^{3}\)
If the maximum space for insulation in the spacecraft's hull was 2921 cm³, the mass that would occupy the aerogel with a density of 0.0030 g/cm³ is:
\(2921 cm^{3} \times \frac{0.0030g}{cm^{3} } = 8.8 g\)
Glass is about 1000 times denser than aerogel. That is,
\(0.0030 g/cm^{3} \times 1000 = 3.0 g/cm^{3}\)
If the maximum space for insulation in the spacecraft's hull was 2921 cm³, the mass that would occupy the glass with a density of 3.0 g/cm³ is:
\(2921 cm^{3} \times \frac{3.0g}{cm^{3} } = 8.8 \times 10^{3} g\)
The mass that would add the aerogel with respect to the glass is:
\(8.8 \times 10^{3} g - 8.8 g \approx 8.8 \times 10^{3} g\)
The mass that the aerogel insulation added to the aircraft, with respect to glass, is 8.8 × 10³ g.
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A scientist wants to make a solution of tribasic sodium phosphate, Na3PO4, for a laboratory experiment. How many grams of Na3PO4 will be needed to produce 400. mL of a solution that has a concentration of Na ions of 1.00 M
Answers
Answer:
21.86 grams
Explanation:
It is important to note that for every mol of Na3PO4 there is, 3 mols of Na ions are produced.
Na+=1m(0.4l), so mols of Na3PO4= 0.4/3= 0.13333... mols
the molar mass of Na3PO4 is 163.94 grams/mol. 0.1333*163.94=21.86 grams of Na3PO4.
When you see or visit grasslands, what do you know about the climate? (Select all that apply.)
They have a lot of precipitation.
They have mild to hot summers.
They have little precipitation.
They have cold winters.
Answers
When you see or visit grasslands you know that :
They have mild to hot summers ( B )They have a lot of precipitation ( A )Grassland vegetationGrasslands are a type of vegetation found mostly in areas with favourable weather conditions such as mild summers and right amount of precipitation which provides the grasslands with enough water for proper growth.
Other types of vegetation include :
Forest vegetationTundra and Desert vegetationDesert vegetation expreciences very hot summers and little precipitation which leads to the scarcity of green vegetation, while forest vegetation expreciences a very high level of precipitation.
Hence we can conclude that When you see or visit grasslands you know that :They have mild to hot summers ,They have a lot of precipitation
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Answer:
They have little precipitation.
They have cold winters.
They have mild to hot summers.
Conversions
If you traded (converted)
15 Skittles for M&Ms,
how many M&Ms do you
have?
Conversion Factor
6 Skittles 4 Cookies
1 Cookies = 2 M&Ms
Answers
If you traded (converted) 15 Skittles for M&Ms, you will have 20 M&Ms
How to convert 15 Skittles to cookiesWe'll begin by converting 15 Skittles to cookies. This can be obtained as follow:
6 Skittles = 4 Cookies
Therefore,
15 Skittles = (15 Skittles × 4 cookies) / 6 skittles
15 Skittles = 10 cookies
How to convert 10 cookies to M&MsWe can convert 10 cookies to M&Ms as follow:
1 Cookies = 2 M&Ms
Therefore,
10 cookies = (10 cookies × 2 M&Ms) / 1 Cookies
10 cookies = 20 M&Ms
Thus, 15 Skittles is equivalent to 20 M&Ms
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How many total bonds (Total shared pairs) are in the lewis structure for HSiN and CO2?
Answers
Answer:
2
Explanation:
Hope it can help you lovelots
#LEARN WITH BRAINLY
What volume of CO2(g), measured at STP is produced if 15.2 grams of CaCO(s) is heated?
Answers
Answer:
Volume = 3.4 L
Explanation:
In order to calculate the volume of CO₂ produced when 15.2 g of CaCO₃ is heated, we need to first write out the balanced equation of the thermal decomposition of CaCO₃:
CaCO₃ (s) + [Heat] ⇒ CaO (s) + CO₂ (g)
Now, let's calculate the number of moles in 15.2 g CaCO₃:
mole no. = \(\mathrm{\frac{mass}{molar \ mass}}\)
= \(\frac{15.2}{40.1 + 12 + (16 \times 3)}\)
= 0.1518 moles
From the balanced equation above, we can see that the stoichiometric molar ratios of CaCO₃ and CO₂ are equal. Therefore, the number of moles of CO₂ produced is also 0.1518 moles.
Hence, from the formula for the number of moles of a gas, we can calculate the volume of CO₂:
mole no. = \(\mathrm{\frac{Volume \ in \ L}{22.4}}\)
⇒ \(0.1518 = \mathrm{\frac{Volume}{22.4}}\)
⇒ Volume = 0.1518 × 22.4
= 3.4 L
Therefore, if 15.2 g of CaCO₃ is heated, 3.4 L of CO₂ is produced at STP.
This political cartoon drawn by John Donaghy appeared in The Daily Graphic on September 16, 1873. The message of this cartoon is reflective of what situation in the late 1800s?
Answers
Sodium sulfate forms several hydrates. A sample of one of these hydrates is heated until all the water is removed. What is the formula of the original hydrate if it loses 43% of its mass when heated?
Answers
Answer:
Na₂SO₄•(H₂O)₆.
Explanation:
The mass that is lost when the sample is heated is water.
Let's assume we have 100 g of the hydrate:
43 grams would be water (H₂O), while the rest (100-43=57) would be sodium sulfate anhydrous (Na₂SO₄).
We convert both those masses to moles, using their respective molar masses:
H₂O ⇒ 43 g ÷ 18 g/mol = 2.39 molNa₂SO₄ ⇒ 57 g ÷ 142.04 g/mol = 0.40 molWe can write those results as (Na₂SO₄)₀.₄₀•(H₂O)₂.₃₉. Now we just need to multiply those numbers so that they become integers.
If we multiply both coefficients by 5 we're left with (Na₂SO₄)₂•(H₂O)₁₂.
Simplify and thus the final answer is Na₂SO₄•(H₂O)₆.
Name 2 ways heat can be transferred through convention.
Answers
Answer:
Heat can travel from one place to another in three ways: Conduction, Convection and Radiation. Both conduction and convection require matter to transfer heat. If there is a temperature difference between two systems heat will always find a way to transfer from the higher to lower system.
Explanation:
The density of copper is a...
a. chemical property
c. chemical change
b. physical property
d. physical change
Answers
Answer:
B. physical property is the answer
On the island of Hawaii, Keanu notices that the sand on the beach is black, the same color as the rock formations on the island. Keanu realizes the sand used to be part of the rock formations. How did material from the rock formations turn into sand?
a
Rays from the sun shone down on the rock, and it broke into pieces.
b
If anything were left out for a long time, it would break into small pieces.
c
The sand was formed by earthquakes, tsunamis, and other natural disasters. These disasters were strong enough to break the rock into small pieces.
d
Wind and rain interacted with the rock, breaking it into small pieces.
Answers
Answer: d
Explanation: Wind and rain interacted with the rock, breaking it into small pieces.
Keanu realizes the sand used to be part of the rock formations. Wind and rain interacted with the rock, breaking it into small pieces and turn into sand. Therefore, option D is correct.
What is rock formation?A rock formation refers to a specific arrangement or pattern of rocks in a particular area that has formed over a long period of time due to geological processes such as erosion, weathering, and tectonic activity.
Wind and rain interacted with the rock, breaking it into small pieces. Over time, the forces of weathering and erosion can break down rock formations into smaller and smaller particles, including sand.
Wind can carry these particles away from their original location and deposit them elsewhere, such as on a nearby beach. In the case of the black sand on the beach in Hawaii, it is likely that the sand was formed from the weathering and erosion of the volcanic rock that makes up much of the island.
Thus, option D is correct.
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which is an example of a colloid? a mixture that settles out, a mixture that scatters light, a mixture that is separated by filtration, or a salt and water mixture?
Answers
These substances have dispersed particles that are large enough to scatter light, making the beam visible. Therefore, out of the options provided, a mixture that scatters light is an example of a colloid. Option B)
A colloid is a type of mixture in which particles are dispersed throughout a medium, creating a homogeneous appearance. Unlike solutions, where the particles are completely dissolved, and suspensions, where the particles settle out, colloids have particles that are larger than those in solutions but smaller than those in suspensions. One characteristic of colloids is that they can scatter light due to the size of the particles. This scattering of light is known as the Tyndall effect. Examples of colloids include milk, fog, and aerosol sprays. These substances have dispersed particles that are large enough to scatter light, making the beam visible. Therefore, out of the options provided, a mixture that scatters light is an example of a colloid. Therefore option B) is correct
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Note Complete Question
which is an example of a colloid?
a mixture that settles out,
b mixture that scatters light,
c mixture that is separated by filtration,
d salt and water mixture?
PLS ANSWER BOTH QUESTIONS I ONLY HAVE AN HOUR PLSSSS
Answers
The number of moles of carbondioxide that will be produced in the combustion of methane is 3 moles (option D).
How to calculate moles using stoichiometry?Stoichiometry refers to the study and calculation of quantitative (measurable) relationships of the reactants and products in chemical reactions (chemical equations).
According to this question, methane undergoes combustion in air to produce carbondioxide and water. Methane is the limiting reactant because the other reactant is oxygen of the air which is always present in excess.
Based on the chemical equation given above, 1 mole of methane produces 1 mole of carbondioxide.
This means that 3 moles of methane will produce 3 moles of carbondioxide.
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I take in oxgyen from the air and send it into your bloodstream. I also remove the carbon dioxide from your body. What system am I?
muscular system
respiratory system
digestive system
skeletal system please help