The reaction between nitrogen and hydrogen produces ammonia according to the equation N2(g) + 3H2(g) = 2NH3(g). Calculating stoichiometries in terms of volumes and moles shows that having 13.5L of nitrogen gas and 17.8L of hydrogen gas at STP will produce approximately 20.47g of ammonia.
Explanation:The subject of this question is the stoichiometry of the reaction between nitrogen gas and hydrogen gas to produce ammonia. This is defined by the balanced chemical equation N2(g) + 3H2(g) = 2NH3(g). According to this equation, one mole of nitrogen gas reacts with three moles of hydrogen gas to form two moles of ammonia.
Given that one mole of an ideal gas occupies approximately 22.4 L at STP (Standard Temperature and Pressure), the moles of nitrogen and hydrogen present in the scenario can be calculated by dividing the given volumes by 22.4. This gives us roughly 0.602 moles of Nitrogen and 0.795 moles of Hydrogen. The limiting reagent in this reaction is Nitrogen, because it would require at least 1.806 moles of Hydrogen to fully react with the Nitrogen present. Hence, the reaction will only proceed until all the Nitrogen is consumed.
This would form roughly 1.204 moles of ammonia (double the amount of Nitrogen as per the stoichiometry). The molar mass of ammonia given is 17 g/mol. So, multiplying the formed moles of ammonia by its molar mass gives us the total mass of produced ammonia, which is about 20.47 g.
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9.04 grams of ammonia will be produced.
If 13.5 L of Nitrogen gas react with 17.8 L of Hydrogen gas at STP, according to the reaction N₂ + 3H₂ → 2NH₃, we need to determine the mass of ammonia produced.
Step-by-Step Solution:
1. Identify the limiting reactant:
Using the balanced equation, 1 volume of N₂ reacts with 3 volumes of H₂. To react with 13.5 L of N₂, we need:
3 × 13.5 L = 40.5 L of H₂
Since we only have 17.8 L of H₂, Hydrogen is the limiting reactant.
2. Calculate the volume of NH₃ produced:
From the stoichiometry, 3 volumes of H₂ produce 2 volumes of NH₃. Hence, 17.8 L of H₂ will produce:
[tex]\frac{2}{3} * 17.8L[/tex] = 11.87 L of NH₃
3. Convert the volume of NH₃ to mass:
At STP, 1 mole of gas occupies 22.4 L. First, find the number of moles of NH₃:
[tex]\frac{11.87L}{22.4 L/mol}[/tex] = 0.5308 moles of NH₃
Now, calculate the mass of NH₃ using its molar mass (17.031 g/mol):
0.5308 moles × 17.031 g/mol = 9.04 grams
Therefore, the mass of ammonia produced is 9.04 grams.
Please help me!!!!
What is the equilibrium constant for the reaction
SO2(g) + NO2(g) = S03(g) + NO(g)?
Answer:
[tex]\frac{[SO3][NO]}{[SO2][NO2]}[/tex]
Option D is the right answer.
Explanation:
When the rate of the forward reaction equals the rate of the reverse reaction, the chemical reaction is in equilibrium. The equilibrium constant (Kc) is used to determine whether reaction is in the equilibrium or not.
Example:
aA+bB⇋cC+dD
Equilibrium constant (Kc) for this reaction will be
Kc = [tex]\frac{[C]^c [D]^d}{[A]^a [B]^b}[/tex]
In this equation, [A] and [B] are equilibrium reactant concentrations. [C] and [D] are equilibrium product concentration and a, b, c, and d are the stoichiometric coefficients of the balanced reaction.
In our reaction,
SO2(g) + NO2(g) = S03(g) + NO(g)
Kc or Keq will be
Keq = [tex]\frac{[SO3][NO]}{[SO2][NO2]}[/tex]
This equation is balanced without any stoichiometric coefficients.
chemistry questions?
Answer:
its to hard
Explanation:
Answer:
its to hard
Explanation:
Directions: Consider a 2-kg bowling ball sits on top of a building that is 40 meters tall. It falls to the ground. Think about the amounts of potential and kinetic energy the bowling ball has:
• as sits on top of a building that is 40 meters tall.
• as it is half way through a fall off a building that is 40 meters tall and travelling 19.8 meters per second.
• as it is just about to hit the ground from a fall off a building that is 40 meters tall and travelling 28 meters per second.
1. Does the bowling ball have more potential energy or kinetic energy as it sit on top of the building? Why?
Answer:
Potential
Explanation:
The higher the elevation is the higher the potential energy levels are also the ball is not moving so it is not using kinetic energy.
Igneous rocks can be formed from magma that solidifies deep beneath the Earth’s surface. When the magma solidifies slowly, it results in rocks with large crystals and a coarse texture. When it cools quickly, it creates more smooth and shiny rock with fine grains.
Sedimentary rocks are made from the weathering and erosion of pre-existing rocks. If the sediment is buried deeply, it becomes compacted and cemented. Sedimentary rocks also form from organic material and often contain fossils.
Metamorphic rock is a result of a transformation of a pre-existing rock subjected to high heat and pressure. This causes the minerals in the rock to become unstable so they either reorient themselves into layers, giving them a striped look or recrystallize into larger crystals.
Based on the reading, how would you classify this rock?
A) Sedimentary rock because of its layers.
B) Metamorphic rock because of its stripes.
C) Igneous rock because it has large crystals.
D) Sedimentary because of the presence of fossils.
A rock with a striped pattern is classified as a metamorphic rock because its characteristics indicate that it has been transformed under high heat and pressure, realigning its mineral structure.
Explanation:When classifying a rock with stripes, it suggests a transformation under high heat and pressure which typically results in the reorientation of minerals within the rock. This description fits the formation process of metamorphic rocks. Therefore, any rock with a striped pattern is likely a metamorphic rock, as igneous rocks form from the cooling of magma or lava and would not have stripes, and sedimentary rocks are characterized by layers formed from deposited sediment and can sometimes contain fossils.
Final answer:
The rock in question should be classified as metamorphic due to its striped look, which is a result of high heat and pressure reorienting minerals within the rock, characteristic of metamorphism.
Explanation:
You would classify this rock as metamorphic because it has a striped look, which is indicative of the foliation process that occurs when a pre-existing rock is transformed due to high heat and pressure. This reorientation of minerals within the rock often gives it a layered or striped appearance, a characteristic feature of metamorphic rocks. Sedimentary rocks, while they also have layers, are formed from particles of pre-existing rocks or organic material that have been compacted and cemented together.
These can sometimes contain fossils, but it is the presence of distinct stripes from the reorientation of minerals that suggests a metamorphic origin in the case you've mentioned. Igneous rocks with large crystals are formed from magma that solidifies slowly beneath the Earth's surface, but these do not have the striped appearance associated with metamorphic rocks.
Given the reactions:
2 X(s) + 2 H2O() → 2 X+(aq) + 2 OH–(aq) + H2(g)
2 Y(s) + 2 H2O() → 2 Y+(aq) + 2 OH–(aq) + H2(g)
The unknowns, X and Y, are most likely
A) metallic elements in the same group
B) metallic elements in the same period
C) nonmetallic elements in the same group
D) nonmetallic elements in the same period
Answer:
A) metallic elements in the same group
Explanation:
X and Y are are group one elements called Alkali metals that react with water to displace hydrogen gas.They have large electrode potential thus they are oxidized to form a metal ion while the water is reduced to hydroxide ions and hydrogen gas.The solution formed is a basic solution and the reaction is exothermic.Note that the reaction of Alkali metals with water is violently and explosively.
The unknowns, X and Y elements are most likelyto be metallic elements belonging to same group. Thus, option A is correct.
The metals are elements in the periodic table that have the tendency to lose electrons and form positive ions. The periodic table has been the arrangement of elements in group and periods.
The elements belonging to same group have similar chemical properties, as they have same number of valence electrons.
The given reaction results in the formation of same byproducts with equivalent ion formation.
The ions for the reaction has a positive charge with the loss of electrons from the atom.
Since, X and Y loses electrons and have similar chemical properties, the elements are likely to be metallic elements belonging to same group. Thus, option A is correct.
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What three mechanisms regulate the heart
.....k+.....HgCl2 gives u...... Hg+ KCl
Answer:
2K + HgCl2 —> Hg + 2KCl
Explanation:
K + HgCl2 —> Hg + KCl
The above equation is not balanced
To balance the equation, do the following.
First, put 2 in front of KCl, the equation becomes,
K + HgCl2 —> Hg + 2KCl
Now we see that Cl is balanced but K is not. To balance K, put 2 in front of K as shown below:
2K + HgCl2 —> Hg + 2KCl
Now we can that the equation is balanced
An automobile gasoline tank holds 23 kg of gasoline. When the gasoline burns, 86 kg of oxygen is consumed, and carbon dioxide and water are produced.
Question:
What is the total combined mass of carbon dioxide and water that is produced?
Answer:
109 kg
Explanation:
When 23 kg of gasoline burns by consuming 86 kg oxygen, they produce carbon dioxide and water. To find the total combined mass of carbon dioxide and water, we will use mass conversation law.
According to mass conversation law, the mass of the product is equal to the mass of reagent.
Mass of reagent = Mass of product
In this reaction,
Gasoline + O2 → CO2 + H2O
23 kg + 86 kg → ?
23 kg + 86 kg = 109 kg
Combined mass of carbon dioxide and water will be 109 kg.
Final answer:
To estimate the CO₂ produced from 40 L of gasoline, we multiply the mass of the gasoline (calculated using the density of 0.75 kg/L) by three, resulting in approximately 90 kg of CO₂, which is comparable to human mass.
Explanation:
Based on the provided combustion reaction 2 C8H18 + 25 O2 → 16 CO₂ + 18 H₂O + energy, we can calculate the mass of CO₂ produced from consuming a 40 L tank of gasoline. First, we determine the mass of gasoline using the given density (0.75 kg/L), which is 40 L × 0.75 kg/L = 30 kg of gasoline. Now, using the factor-of-three ratio of CO₂ mass to input fuel mass, we multiply the gasoline mass by three to estimate the CO₂ mass produced. Hence, 30 kg × 3 = 90 kg of CO₂ are produced after burning 40 L of gasoline. If we compare this to the typical human mass, which is roughly between 50-100 kg, one can see that the mass of CO₂ produced is remarkably similar to or even exceeds the mass of an average human.
A rectangular field measures 6.0 m by 8.0 m. What is the area of the field in square centimeters (cm 2 )? Use the formula: Area = length × width.
A: 4.8 × 10 4 cm 2
B: 4.8 × 10 5 cm 2
C: 4.8 × 10 3 cm 2
Final answer:
The area of a rectangular field measuring 6.0 m by 8.0 m is 480,000 cm², which is 4.8 × 10⁵ cm² in scientific notation. So the correct option is B.
Explanation:
To calculate the area of a rectangular field in square centimeters, you would use the formula Area = length × width. First, we must ensure that both dimensions are in the same units, so we convert the dimensions from meters to centimeters. There are 100 centimeters in a meter, so:
6.0 m = 600 cm8.0 m = 800 cmNext, we calculate the area using the converted measurements:
Area = 600 cm × 800 cm = 480,000 cm²
Therefore, the area of the field in square centimeters is 480,000 cm², which can be expressed in scientific notation as 4.8 × 105 cm2, making option B the correct answer.
I need help a b c d
Answer:
Option-A (XY)
Explanation:
In this problem one should focus on the number of valence electrons present in each atom. Remember that in lewis structure the dots on an atom always show the valence shell electrons. In given statement;
The,
X has one valence electron. It means that it can loose this single electron to attain the noble gas configuration i.e.
X° → X⁺ + 1e⁻
Similarly,
Y have seven valence shell electrons. Therefore, in order to complete the octet this atom will gain one electron i.e.
::Y:° + 1 e⁻ → Y⁻
Hence, we can conclude that X got stabilized by losing one electron and Y got stabilized by gaining one electron therefore, only one of each is required to form an ionic compound i.e.
X⁺ + Y⁻ → XYWhen a liquid evaporates - does it take energy from its surroundings or does it give off energy to its surroundings?
Answer:
yes it doese
Explanation:
assuming oxygen behaves like an ideal gas, what volume in liters would 3.50 moles of oxygen gas occupy at STP?
Answer:
78.4L
Explanation:
1 mole of any gas is found to occupy 22.4L at stp. This also indicates that 1mole of oxygen occupy 22.4L.
Therefore,
3.50 moles of oxygen Will occupy = 3.5x22.4 = 78.4L
At Standard Temperature and Pressure (STP), one mole of an ideal gas occupies around 22.4 liters. Accordingly, 3.50 moles of oxygen would occupy a volume of 78.4 liters.
Explanation:The question is inquiring about the volume an ideal gas, in this case oxygen, would occupy at Standard Temperature and Pressure (STP) given its quantity in moles. It's well established in chemistry that at STP, which is defined as a temperature of 273.15 K and a pressure of 1 atm, one mole of any ideal gas occupies approximately 22.4 liters. This is often known as the standard molar volume. Therefore, to calculate the volume that 3.50 moles of oxygen would occupy, multiply the number of moles (3.50) by the volume of one mole (22.4 L/mole) which results in a volume of 78.4 liters.
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Why is it easier for liquid water to evaporate on mars than on earth
Answer:
Because there is a lesser if not absent atmospheric pressure on Mars relative to earth
Explanation:
On earth the liquid water will experience atmospheric downward pressure due to the earth's atmosphere which will require it to evaporate at a vapour pressure that is greater than the atmospheric pressure. This is not the case for Mars which lacks an atmosphere due to its weak gravitional pull, water will therefore evaporate easily on mars than on earth
what is the mola dirt of a salt solution made by dissolving 250.0 grams of NaCl in 775 mL of solution?
Answer:
Molarity = 5.52 mol.L⁻¹
Explanation:
Molarity is the amount of solute dissolved per unit volume of solution. It is expressed as,
Molarity = Moles / Volume of Solution ----- (1)
Data Given;
Mass = 250.0 g
Volume = 775 mL = 0.775 L
First calculate Moles for given mass as,
Moles = Mass / M.mass
Moles = 250.0 g / 58.44 g.mol⁻¹
Moles = 4.277 mol
Now, putting value of Moles and Volume in eq. 1,
Molarity = 4.277 mol ÷ 0.775 L
Molarity = 5.52 mol.L⁻¹
What type of reaction is 2NaN3(s) +2Na(s) + 3N2(g)
Final answer:
The reaction is a decomposition reaction where sodium azide decomposes into sodium and nitrogen gas.
Explanation:
The type of reaction represented is a decomposition reaction. This is a chemical reaction where a single compound breaks down into two or more elements or simpler compounds. Sodium azide (NaN3) decomposes into sodium metal (Na) and nitrogen gas (N2). One mole of sodium azide (NaN3) has a molar mass of approximately 65 g/mol.
Therefore, if 23.4 g of sodium azide is used, the moles of nitrogen gas produced can be calculated using the molar mass and the stoichiometry of the reaction. At standard temperature and pressure (STP), one mole of any gas occupies approximately 22.4 liters. By using the stoichiometry of the balanced equation, one can determine the volume of nitrogen gas produced at STP from a given amount of sodium azide.
A reaction is shown below. Reaction : 2 upper H subscript 2 upper O subscript 2 (l) right arrow with upper M n upper O subscript 2 (s) above it, 2 upper H subscript 2 upper O (l) plus upper O subscript 2 (g). What can be concluded about this reaction?
A homogeneous catalyst is being used in the reaction.
A heterogeneous catalyst is being used in the reaction.
A catalyst is not being used in this reaction.
An enzyme is being used in this reaction.
Answer:
heterogeneous catalyst
Explanation:
The reaction equation:
MnO₂[tex]_{s}[/tex]
H₂O₂[tex]_{l}[/tex] → 2H₂[tex]_{g}[/tex] + 2O₂[tex]_{g}[/tex]
A catalyst is any species that speeds up the rate of chemical reactions. It does not get used up in the reaction but helps facilitate the rate by which two species combines.
In this reaction, MnO₂ is the catalyst used in this reaction.
The catalyst still remains at the end of the reaction.
Now, we know that from the subscript, the reactant is in liquid phase, the products are in gaseous phase and the catalyst is in solid phase.
A catalyst in a reaction in a different phase with the reactants is called a heterogeneous catalyst.
Answer:
The answer is B. A heterogeneous catalyst is being used in the reaction.
Explanation:
which of these four elements is the most reactive metal?
Answer:
Sodium (NA)
Explanation:
Answer:
rubidium: rb
Explanation:
The table below shows properties of the element gold (Au).
Property Gold's
Characteristics
Color yellow
Density 19.32 g/mL
Electronegativity 2.54
Ionization Potential 9.225
Boiling Point 2807°C
Melting Point 1064.58°C
A physical property of gold is _______.
A.
density of 19.32 g/mL
B.
melting point of 1064.58°C
C.
boiling point of 2807°C
D.
all of these
Answer:
D = All of these
Explanation:
Physical properties:
Physical properties involve those properties which includes the state of matter.
For example,
Melting point, boiling point, freezing point, density, smell, color
In given example,
The density of gold is 19.32 g/mL
Melting point is 1064.58°C
Boiling point is 2807°C
All these are physical properties.
Chemical properties:
Chemical properties includes those properties which involves the chemical reaction
For example.
Flammability, reactivity, acidity, heat of combustion, toxicity etc.
The reaction of gold with oxygen:
Chemical equation,
3Au + O₂ → Au₂O₃
Light can travel through outer space from the Sun to the Earth. This shows that
Answer:
that light is on the electromagnetic spectrum
Explanation:
this is because In physics, the term light sometimes refers to electromagnetic radiation of any wavelength, whether visible or not. In this sense, gamma rays, X-rays, microwaves and radio waves are also light. Like all types of EM radiation, visible light propagates as waves. However, the energy imparted by the waves is absorbed at single locations the way particles are absorbed. The absorbed energy of the EM waves is called a photon, and represents the quanta of light.
Answer:
light is made of particles, called photons. Except their movement to earth, every photon vibrates in every direction (they vibrate in just one direction if light is polarized).
Explanation:
Must be 5 paragraphs please have everything down
Which half reaction correctly describes the oxidation that is taking place? Z n (s) right arrow upper Z n superscript 2 plus (a q) plus e superscript minus. Upper Z n (s) right arrow upper Z n superscript 2 plus (a q) plus 2 e superscript minus. Upper C u superscript 2 plus (a q) plus 2 e superscript minus right arrow upper C u (s). Upper C u superscript 2 plus (a q) plus e superscript minus right arrow upper C u (s).
Explanation::
Electrochemical cell
It is the cell that converts the chemical energy in to electric energy .The reaction staking place in it are spontaneous that is occur by itself .
In it the oxidation and reduction both occur .
The one with high electrode potential looses electrons that is it shows : oxidation
Th one with lower electrode potential gains electrons that is it shows :Reduction .
In this galvanic cell (Zn-Cu couple )
The oxidation occurs at anode that is :
Zn-2e---->Zn²⁺
The reduction occurs at cathode :
Cu²⁺ + 2e--->Cu
Answer:
The correct answer is option B ;)
Explanation:
what is the molar mass of hydrogen dioxide?
Answer: 34.0147 g/mol
Explanation:
Answer:34.02g/mol
Explanation:H2O2
2x1.01 + 2x16 grams/mols
2.02 + 32 =34 .2g/mol
!!!HELP ASAP!!! According to Le Châtelier's principle, how will a pressure increase affect a
system that includes matter in the gas phase and another phase?
A. The system will remain unchanged.
B. The total number of gas molecules will decrease.
C. The equilibrium reactions will slow down.
D. The total number of gas molecules will increase.
Answer: b. the total number of gas molecules will decrease.
Explanation:
According to principle, how will a pressure increase affect a system that includes matter in the gas phase and another phase that means the total number of gas molecules will decrease.
What is Principle?This principle shows that when we alter a system in equilibrium, it will seek to acquire a new state that cancels out this disturbance. Thus, there is a shift in equilibrium, that is, a search for a new equilibrium situation, favoring one of the reaction directions.
principle concerns the response of systems in equilibrium when subjected to a perturbation. Simply put, the principle says that a system in equilibrium when disturbed tends to adjust itself in order to remove the disturbance and restore equilibrium.
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lactic acid, which consists of C, H, and O, has long been thought to be responsible for muscle soreness following strenuous exercise. Determine the empirical formula of lactic acid given that combustion of a 10.0 g sample produces 14.7 g carbon dioxide and 6.00 g water. If the molar mass of lactic acid is 90g/mol, what is the molecular formula
To find the empirical formula of lactic acid, we calculate the moles of C, H, and O from the products of combustion and determine the simplest whole number ratio. The molecular formula is then found by establishing the integer multiple of the empirical formula that matches the given molar mass of lactic acid.
Explanation:To determine the empirical formula of lactic acid from the given combustion data, we use the mass of products to find the quantity of each element in the original compound. Starting with carbon, 14.7 g of CO2 is produced from the combustion of lactic acid. Using the molar mass of CO2 (44 g/mol), we calculate that there are 0.334 moles of carbon in the 10.0 g of lactic acid.
For hydrogen, 6.00 g of water means there are 0.333 moles of water, which equates to 0.667 moles of hydrogen, since each water molecule contains two hydrogen atoms. Oxygen is a bit more complicated because it's part of both CO2 and H2O. After accounting for the oxygen in CO2 and H2O, we calculate the remainder to be part of the lactic acid. The molar ratios of C:H:O give us the empirical formula, which can be determined by dividing each mole quantity by the smallest amount to find the simplest whole number ratio.
Given a molar mass of 90 g/mol for lactic acid, we can use the empirical formula mass to determine the number of empirical units in the molecular formula. The molecular formula can be found by multiplying the empirical formula by an integer factor that converts the empirical formula mass to the actual molar mass.
(1.000) How many moles can be found in 83.80 grams of krypton?
Answer: 1 mole Kr
Explanation: solution
83.80g Kr x 1mole Kr / 84 g Kr
= 0.997 or approximately 1 mole Kr
You conduct an experiment in which you measure the temperature (T) and volume (V) of a mysterious sphere of gas at several different temperatures.
The sphere can expand or shrink to any volume without changing the pressure of the gas inside.
As a result of your experiment, you find that the volume (V) of the gas divided by its temperature (T) is always equal to 1.75.
What would the volume (V) of the gas be at a temperature of 300K? (assume the unit for volume is liters)
Show your work and answer the question with a clear statement. Show each step of your calculations for full points. After showing your calculations, answer the question with a clear statement.
Answer:
[tex]\large\boxed{\text{The volume of the gas at a temperature of 300K is 575 liters}}[/tex]
Explanation:
You already know the relation between the volume (V) of the gas and its temperature (T):
[tex]V/T=1.75[/tex]
The units of V is liters and of T is Kelvin (K).
Thus, the units of the constant 1.75 is liters/K.
Hence, to find the volume (V) of the gas at a temperature (T) of 300 K, you just must solve for V and substitute the temperature to compute V:
Multiply both sides by T:[tex]V=1.75T[/tex]
Substitute T with 300K:[tex]V=1.75liters/K\times 300K=575liters[/tex]
Which best decribes a similarity between power plants that use water as an energy source
B.
Both use kinetic energy to produce electricity is a similarity between power plants that use water as an energy source and those that use wind as an energy source.
Explanation:
Kinetic energy Is the intrinsic energy that an object or substance possesses due to its motion. All power plants that use water as an energy source utilize the kinetic energy of water to produce electricity. For example, hydro-power plants use the kinetic energy of water flowing due to gravity. Tidal power plants utilize the kinetic energy of water flowing due to tidal changes and geothermal powerplants utilize the energy of steam-water ejecting underground through fissures.
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1. Using the balanced equation, answer the following questions:
2KClO3 → 2KCl + 3O2
a. How many molecules of O2 will be formed from 34.35 grams of KClO3?
b. How many grams of KCl will be formed from 52.53 grams of KClO3?
Answer:
a) 2.53 × 10²³ molecules of O₂
b) 31.90 g of KCl
Explanation:
The balance chemical equation for given decomposition reaction is as follow;
2 KClO₃ → 2 KCl + 3 O₂
Part 1:Step 1: Calculate Moles for given amount of KClO₃;
Moles = Mass / M.Mass
Moles = 34.35 g / 122.55 g/mol
Moles = 0.280 moles of KClO₃
Step 2: Find out moles of O₂ produced;
According to eq,
2 moles of KClO₃ produces = 3 moles of O₂
So,
0.280 moles of KClO₃ will produce = X moles of O₂
Solving for X,
X = 0.280 mol × 3 mol / 2 mol
X = 0.42 moles of O₂
Step 3: Calculate No. of Molecules of O₂ as,
No. of Molecules = Moles × 6.022 × 10²³
No. of Molecules = 0.42 mol × 6.022 × 10²³ molecules/mol
No. of Molecules = 2.53 × 10²³ molecules of O₂
Part 2:Step 1: Calculate Moles for given amount of KClO₃;
Moles = Mass / M.Mass
Moles = 52.53 g / 122.55 g/mol
Moles = 0.428 moles of KClO₃
Step 2: Find out moles of KCl produced;
According to eq,
2 moles of KClO₃ produces = 2 moles of KCl
So,
0.428 moles of KClO₃ will produce = X moles of KCl
Solving for X,
X = 0.428 mol × 2 mol / 2 mol
X = 0.428 moles of KCl
Step 3: Calculate Mass of KCl as;
Mass = Moles × M.Mass
Mass = 0.428 mol × 74.55 g/mol
Mass = 31.90 g of KCl
By calculating the number of moles of KClO3 and using the stoichiometric ratios in the balanced equation, we find that 34.35 grams of KClO3 will produce about 2.53 x 10^23 molecules of O2, and that 52.53 grams of KClO3 will form about 31.97 grams of KCl.
Explanation:The first thing we should do is calculate the molar mass of KClO3 which is approximately 122.55 g/mol. Then, find the number of moles of KClO3 in each part of the question.
a. The number of moles in 34.35 grams of KClO3 is 34.35 g / 122.55 g/mol = 0.2803 mol. From our balanced equation we know we get 3 molecules of O2 for every 2 molecules of KClO3, so we get 0.2803 mol x (3/2) = 0.4205 mol of O2. In molecules, this is 0.4205 mol x Avogadro's number (6.022 x 10^23) = 2.53 x 10^23 molecules of O2.
b. For 52.53 grams of KClO3 we get a number of moles equal to 52.53 g / 122.55 g/mol = 0.4288 mol. Following the balanced equation, we get an equal amount of KCl, thus 0.4288 mol. In grams, this is 0.4288 mol x 74.55 g/mol (molar mass of KCl) = 31.97 grams of KCl.
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Convert 4.57X-3m to the equivalent length in nanometers
Answer:
4.57 × 10⁶ nanometers
Explanation:
In this problem we are asked to convert between two units i.e. a meter into nanometer. In sciences, the different units are used for a same quantity (achieved by multiplying conversion factors) to get rid of very small values and get a readable and intelligible values.
For Example:
In given statement the value of small distance is 4.5 × 10⁻³ meter the real number form of this number is 0.00457. Hence, this number can be converted to a very large number by multiplying it with 10⁹ or 1000000000. Hence,
4.5 × 10⁻³ × 1.0 × 10⁹ = 4.57 × 10⁶
Or,
4.5 × 10⁻³ meters = 4.57 × 10⁶ nanometers
Although the quantity is the same for same units but the number has changed.
You want to test how the mass of a reactant affects the speed of a reaction.
Which of the following is an example of a controlled experiment to test this?
To test how mass of a reactant affects speed of a reaction, set up an experiment using a consistent reactant, like hydrochloric acid, and alter the mass of another reactant, like sodium bicarbonate. By keeping all other variables constant, you can measure how the varying mass affects the speed of the reaction indicated by when bubbling ceases.
Explanation:To test how the mass of a reactant affects the speed of a reaction, an experiment could be set up in the following way: Obtain a substance that reacts with a certain reactant. This could be an acid-base reaction or a redox reaction. Let's say the reaction is between hydrochloric acid (HCl) and sodium bicarbonate (NaHCO3) which produces carbon dioxide gas.
Maintain controlled conditions: all other variables such as temperature, pressure, and volume of HCl should be kept constant. The only changing factor would be the mass of the sodium bicarbonate.
Measure the time it takes for the reaction to complete for various masses of NaHCO3. You do this by observing when the bubbling (indicative of CO2 production) stops. You would likely see that increasing the mass of the reactant (NaHCO3) increases the speed of the reaction.
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The correct option is D.
The best experimental design for testing how the mass of a reactant affects the speed of reaction would be 'The mass of one reactant at a time is varied, and the time it takes the reaction to finish is measured', while maintaining other factors like temperature and concentration of other reactants constant. This method is known as the method of initial rates.
Explanation:The best example of a controlled experiment to test how the mass of a reactant affects the speed of a chemical reaction would be option D: The mass of one reactant at a time is varied, and the time it takes the reaction to finish is measured. This method is known as the method of initial rates, often employed in chemistry to measure reaction rates using different initial reactant concentrations. It is crucial to vary only one aspect while keeping others constant (temperature, concentration of other reactants etc.) to accurately determine the effect one factor has on the reaction speed.
The temperature of the reactants and concentration of the reactants also significantly impacts the rate of a chemical reaction. Higher the temperature, or the concentration, faster the reactions typically occur. However, these other factors need to be controlled in this experiment to singularly test the effect of mass of one reactant.
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The complete question is given below:
You want to test how the mass of a reactant affects the speed of a reaction.
Which of the following is an example of a controlled experiment to test this?
A. The mass of one reactant and the temperature of the reaction mixture are increased until the reaction is finished.
B. The mass of all the reactants is varied, and the time it takes the reaction to finish is measured.
C. The mass of all of the reactants is kept the same, and the mixtures are allowed to react for different lengths of time.
D. The mass of one reactant at a time is varied, and the time it takes the reaction to finish is measured.