Answers
The grams of pigment needed is 9.20 grams
The grams of water needed is 0.199 grams.
The final molarity of the binder in the paint mixture is 20.04 M.
What are the masses of substances required?The masses of substances required are reived from the mole ratios given.
The grams of pigment needed:
mole ratios of CaCO3 and Cr2O3 is 1 : 1.52
Using the conversion factors:
molar mass of CaCO3 = 100.1 g
molar mass of Cr2O3 = 151.99 g
grams of pigment needed = (0.400 g CaCO3 x 1 mol CaCO3/100.1 g CaCO3) x (1.52 mol Cr2O3/1 mol CaCO3) x (151.99 g Cr2O3/1 mol Cr2O3) grams of pigment needed = 9.20 g Cr2O3
the grams of water needed:
mole ratio of CaCO3 and H2O is 1 : 27.5
molar mass of H2O = 18.0 g
the grams of water needed = 0.400 g CaCO3 x (1 mol CaCO3/100.1 g CaCO3) x (27.5 mol H2O/1 mol CaCO3) x (18.0 g H2O/1 mol H2O)
the grams of water needed = 0.199 g H2O
From the density of water, the volume of water needed is 0.199 mL of water.
Molarity = moles of solute/volume of solution in liters
Volume of solution = 0.000199 L
Number of moles of CaCO3 = 0.400/100.1 g
Number of moles of CaCO3 = 0.003998 mol
Molarity = 0.003998/0.000199
Molarity = 20.04 M
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Related Questions
Can anyone name this compound. Only number 4. and i would appreciate if you could explain how you name it.
Answers
The IUPAC name of the compound is 3-chloro-4-ethyl-2,4-dimethyloctane
How do i determine the name for the compound?The naming of compound follows the IUPAC principles. This is illustrated below:
Locate the longest continuous carbon chain. In this case it is carbon 8. Thus, we can say that the parent name is octaneIdentify the substituent groups attached. In this case the substituent groups attached are: Cl, CH₃ and CH₂CH₃ Give the substituents the lowest count. In this case, Cl is located at carbon 3, CH₂CH₃ is located at carbon 4 and the two CH₃ are located at carbon 2 and 4Combine the above to obtain the IUPAC name for the compound.Thus, the IUPAC name for the compound is: 3-chloro-4-ethyl-2,4-dimethyloctane
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Classify each element. Note that another term for main group is representative, another term for semimetal is metalloid, and the
inner transition metals are also called the lanthanide and actinide series.
Main-group metal
(representative metal)
Ru
Ta
Main-group nonmetal
(representative nonmetal)
As
Rn
Main-group
semimetal
(metalloid)
Answer Bank
In
Transition metal
Eu
Se
Inner transition metal.
(lanthanide/actinide)
Answers
Main-group metal (representative metal): Ru, Ta. Main-group nonmetal (representative nonmetal): As, Rn. Main-group semimetal (metalloid): In. Transition metal: Eu. Inner transition metal (lanthanide/actinide): Se is not an inner transition metal. Therefore, the correct answer for Se should be replaced with an inner transition metal (lanthanide or actinide) .Possible replacements for Se: La (lanthanide), Am (actinide).
Main group elements can be further classified as metals, nonmetals, or metalloids (also known as semimetals) based on their physical and chemical properties. Metals are typically shiny, good conductors of heat and electricity, and malleable. Nonmetals are typically brittle, poor conductors of heat and electricity, and have low melting and boiling points. Metalloids have properties of both metals and nonmetals and are semiconductors.
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what is the name for CH3-CH2-C(O)-OCH3
Answers
Answer:
The name for CH3-CH2-C(O)-OCH3 is ethyl methanoate.
Explanation:
How many moles of KF are contained in 180.0 mL of a 0.250 M solution?
Answers
Answer:
To calculate the number of moles of KF in a solution, we can use the formula:
moles = concentration x volume
where concentration is in units of moles per liter (M), and volume is in liters (L).
First, we need to convert the volume from milliliters (mL) to liters (L):
180.0 mL = 0.1800 L
Next, we can plug in the values we have:
moles = 0.250 M x 0.1800 L = 0.0450 moles
Therefore, there are 0.0450 moles of KF in 180.0 mL of a 0.250 M solution.
Explanation:
5.4g of aluminum reacts with sulfuric acid (H₂SO4) to form aluminum sulfate and hydrogen.
a. Write the chemical equation.
b. Find mass of required sulfuric acid.
C. Find volume of the obtained gas.
(AI=23, S = 32, O=16, H =1, 2g of H2 has 22.4L).
Answers
Answer:
a. The chemical equation for the reaction is:
2Al + 3H₂SO₄ → Al₂(SO₄)₃ + 3H₂
b. To find the mass of required sulfuric acid, we need to use stoichiometry. We can start by finding the number of moles of aluminum used in the reaction:
Molar mass of Al = 27 g/mol
Number of moles of Al = 5.4 g / 27 g/mol = 0.2 mol
According to the balanced equation, 3 moles of H₂SO₄ are required to react with 2 moles of Al. Therefore, the number of moles of H₂SO₄ required is:
Number of moles of H₂SO₄ = 3/2 x 0.2 mol = 0.3 mol
Molar mass of H₂SO₄ = 2 x 1 g/mol + 32 g/mol + 4 x 16 g/mol = 98 g/mol
Mass of H₂SO₄ required = 0.3 mol x 98 g/mol = 29.4 g
Therefore, 29.4 g of sulfuric acid is required to react with 5.4 g of aluminum.
c. To find the volume of hydrogen gas obtained, we need to use the ideal gas law:
PV = nRT
where P is the pressure of the gas, V is its volume, n is the number of moles of the gas, R is the universal gas constant (0.0821 L atm/mol K), and T is the temperature in Kelvin.
We can start by finding the number of moles of hydrogen gas produced in the reaction. According to the balanced equation, 3 moles of H₂ are produced for every 2 moles of Al. Therefore, the number of moles of H₂ produced is:
Number of moles of H₂ = 3/2 x 0.2 mol = 0.3 mol
Assuming the reaction occurs at standard temperature and pressure (STP), which is 0°C (273 K) and 1 atm, we can use the molar volume of a gas at STP, which is 22.4 L/mol. Therefore:
V = nRT/P = 0.3 mol x 0.0821 L atm/mol K x 273 K / 1 atm = 6.58 L
Therefore, the volume of hydrogen gas produced at STP is 6.58 L.
Explanation:
8. Base your answer to the following question on the equation below.
2H2(g) + O2(g) → 2H₂O()+571.6 kJ
Identify the information in this equation that indicates the reaction is exothermic.
Answers
The positive value of 571.6 kJwhich is the enthalpy change tells us that it is exothermic
What is an exothermic reaction?When energy is released into the surrounding area during a chemical reaction, it's considered an exothermic reaction with ΔH < 0. Conversely, endothermic reactions result from heat absorption with ΔH > 0.
The provided equation's positive value of 571.6 kJ reveals that heat is pouring out of the reaction, causing negative changes in enthalpy and firmly placing this chemical event as exothermic in nature.
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Hydrogen bonding activity drawings
Answers
Answer:UIHIU
A small amount of chemical splashes in Frank’s eye. What should Frank do immediately?
Explanation:A small amount of chemical splashes in Frank’s eye. What should Frank do immediately?
The activation energy, Ea, for a particular reaction is 37.8 kJ/mol. If the rate constant at 280 K is 0.178 M/s, then what is the value of the rate constant at 381 K? (R = 8.314 J/mol • K)
Answers
The rate constant that we have at 381 K will be 2.19 M/s.
What is the Arrhenius equation?The Arrhenius equation suggests that the rate of a reaction increases with temperature, because higher temperatures provide more kinetic energy to the reactant molecules, making them more likely to react.
By the use of the Arrhenius equation, we have that;
ln k2/k1 = -Ea/R(1/T2 - 1/T1)
ln k2/0.178 = -37.8 * 10^3/8.314 (1/381 - 1/280)
ln k2/0.178 = - 4647 * (2.62 - 3.57) * 10^-3
lnK2 = 0.786
k2 =e^0.786
k2 = 2.19 M/s
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what statement is true about the potential energy diagram for an exothermic reaction?
Answers
It is in the exothermic reaction, system loses heat to surroundings. Since heat is given out in exothermic reactions, enthalpy of products will be less than that of the reactants. Products have less potential energy than reactants for exothermic reactions.
The chemical reactions which proceed with the evolution of heat energy are called the exothermic reactions. The energy hump corresponds to the energy barrier existing between the reactants and products in an exothermic reaction.
From the energy diagram of an exothermic reaction, products have less potential energy than the reactants.
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According to the law of conservation of mass, how much zinc was produced if Calcium = 25 g, Zinc Carbonate = 125 g, and Calcium Carbonate = 95 g.
HELPP
Answers
All the balanced chemical equations obey the law of conservation of mass. The numbers which are used to balance the chemical equation are called the coefficients. So here the mass of zinc is 55 g.
According to the law of conservation of mass, the mass can neither be created nor be destroyed but it can be converted from one form to another. The reactants appear on the left hand side and the products appear on the right hand side.
The amount of products is equal to the amount of reactants according to the law of conservation of mass.
25 + 125 = 95 + Zn
Zn = 55 g
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CO, (9) +2NH_(9) - CO(NH,) (s) +H, O(1)
a. What is the maximum mass of urea, CO(NH), that can be manufactured from the reaction of 2.20 moles of CO2 with sufficient amount of ammonia.
Answers
The mass of the ammonia that is required is 258 g.
What is the stoichiometry of the reaction?
The quantitative correlations between the reactants and products in a chemical reaction are the focus of the chemistry subfield known as stoichiometry.
We have to know that;
1 mole of CO2 produces 1 mole of urea
2.2 moles of CO2 produces 2.2 urea
Given that the number of moles of urea = 455 g/60 g/mol
= 7.58 moles
Now;
2 moles of NH3 produces 1 mole of urea
x moles of NH3 produces 7.58 moles of urea
x = 7.58 * 2/1
= 15.16 moles
Mass of the ammonia = 15.16 moles * 17 g/mol
= 258 g
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3. Each container holds one litre of water. Write the least amount of salt needed to make each solution saturated. Then draw a picture of the saturated solution in the circle. answer of this.
Answers
To get them to th e point of saturation,
Container A needs 259gm of SaltContain B needs 159gm of saltContainer C needs no additional salt that is 0gms of salt.Why is this so?The simple a rationale is that a liter of water will only get saturated after 359 grams of salt has been added to it.
Thus, while A is not saturated and B is almost saturated, container C is super saturated and most likely will contain visible forms of salt crystals.
Note that container B will exhibit the qualities of an unstable solutions.
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A substance is soluble if it can dissolve into another substance Salt is
soluble in water, but does this mean that water can dissolve an unlimited
amount of salt? No, it does not! When water has dissolved all the salt it
can, the resulting solution is described as saturated Before that point, the
solution is unsaturated. A saturated solution of water and salt contains
359 grams of dissolved salt for each litre of water.
Have you ever tasted sea water from the ocean? It is a solution of about
35 g of salt for every litre of water. Now, have you ever tasted the solution
in a jar of pickles? It certainly contains a lot of salt. In fact, the nearly
saturated salt content is exactly what deters harmful micro-organisms and
preserves the pickles.
Each container holds one litre of water. Write the least amount of salt needed to make each solution saturated. Then draw a picture of the saturated solution in the circle. answer of this.
Contain A = A solution of 100g of salt
Contain B = A solution of 200g of salt
Contain c = SAturated Solution (500g)
Based on the information provided, which solution is a base and weak electrolyte
Answers
An example of a composition which fulfills the qualifications of being both a base and a weak electrolyte is ammonia (NH3).
How to explain the electrolyteA base is any constituent which voluntarily receives protons (H+) in an associated chemical reaction while an electrolyte denotes any material that can conduct electricity through liquids or in melted state.
Upon dissolution in water, it is apt to accept a proton from such and thus create the acidic ion known as ammonium (NH4+). Nonetheless, due to its scarce dissociation into hydroxide (OH-) and ammonium ions, it is deemed a weak electrolyte.
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The student who represents Earth sees different stars from different positions in the circle. How does this model suggest evidence that Earth circles the sun once a year?
Answers
Earth orbits the sun in a predictable pattern. The pattern of Earth's seasons depend on how much sunlight reaches different areas of Earth as the planet moves around around the sun. It is the earth sun model which shows that the earth circles the sun once a year. So revolution is responsible for it.
Earth has a nearly circular orbit around the sun, Earth also rotates around its north-south axis, an imaginary line passing through earth from pole to pole. Every place on the planet gets 12 hours of light and 12 hours of dark each day.
The temperature conditions on the planet change depending on the distance from the sun. There are colder temperatures at the poles and warmer temperature at the equator.
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The gas pressure in a can is 2.5 atm at 25 °C. Assuming that the gas obeys the ideal-gas equation, what is the pressure (in atm) when the can is heated to 525 °C?
Answers
The concept combined gas law is used here to determine the new pressure of the gas. This law states that the ratio between the product of pressure-volume and temperature of a system remains constant.
The combined gas law is the combination of Boyle's law, Charles's law and the Avogadro's law. These laws relate one thermodynamic variable to another holding everything else constant.
Here volume is constant, so the equation is:
P₁ / T₁ = P₂ / T₂
T₁ = 298 K
T₂ = 798 K
Pressure is:
P₂ = P₁ T₂/T₁
P₂= 2.5 × 798 / 298
P₂ = 6.69 atm
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Ice actually has negative caloric content. How much energy, in each of the following units, does your body lose from eating (and therefore melting) 70 g
of ice? Heat of fusion for water is 6.02 kJ/mol
.
Answers
The heat of fusion for water is 6.02 kJ/mol. This means that it takes 6.02 kJ of energy to melt one mole of ice. To calculate the amount of energy required to melt 70 g of ice, we need to convert the mass to moles:
n = m / M
where n is the number of moles, m is the mass, and M is the molar mass. The molar mass of water is 18.02 g/mol:
n = 70 g / 18.02 g/mol = 3.88 mol
The amount of energy required to melt 3.88 mol of ice is:
Q = n x ΔHfus
where Q is the amount of energy, ΔHfus is the heat of fusion. Substituting the values:
Q = 3.88 mol x 6.02 kJ/mol = 23.3 kJ
Therefore, the amount of energy that your body loses from eating (and melting) 70 g of ice is 23.3 kJ.
2. Balance the equation below for the reaction between acetylene and oxygen, using the smallest
whole-number coefficients.
C₂H₂(g) +
O₂(g) →→
_CO₂(g) +
H₂O(g) + heat
Answers
C₂H₂ + 5/2 O[tex]_2[/tex](g) → 2CO[tex]_2[/tex](g) +H [tex]_2[/tex]O(l) is the balanced equation for the given unbalanced chemical equation.
An equation per a chemical reaction is said to be balanced if both the reactants plus the products have the same number of atoms and total charge for each component of the reaction. In a nutshell, the two components of the reaction have an equal balance of mass and charge. preservation of charge and mass, equation and reaction balance, etc.
C₂H₂ + O[tex]_2[/tex](g) → CO[tex]_2[/tex](g) +H [tex]_2[/tex]O(l)
Firstly balance the number of carbon atoms on product side by multiplying by 2
C₂H₂ + O[tex]_2[/tex](g) → 2CO[tex]_2[/tex](g) +H [tex]_2[/tex]O(l)
Now balance hydrogen and oxygen
C₂H₂ + 5/2 O[tex]_2[/tex](g) → 2CO[tex]_2[/tex](g) +H [tex]_2[/tex]O(l)
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Can anyone please name this compound?
Answers
Answer:
Fluorobenzene
Explanation: Fluorobenzene is an organic compound, which is a derivative of benzene. It has a fluorine atom attached to one of the carbon atoms in the benzene ring. It appears as a colorless liquid and has a slightly sweet odor. Fluorobenzene is used as a solvent and catalyst in various chemical reactions. It is also used in the production of agrochemicals and pharmaceuticals. Due to its high solubility in water, it can contaminate groundwater and pose a risk to human health and the environment.
I just need # 6,8 and 12 pls
Answers
6. 1 [tex]SO_{3}[/tex] + 1 [tex]H_{2}O[/tex] --> 1 [tex]H_{2} SO_{4}[/tex]
8. 1 [tex]K_{2}O[/tex] + 1 [tex]H_{2}O[/tex] --> 2 KOH
12. 1 [tex]CdSO_{4}[/tex] + 1 [tex]H_{2} S[/tex] --> 1 CdS + 1 [tex]H_{2} SO_{4}[/tex]
0.152 mol of sucrose in 602 mL of solution
Answers
Answer:
To convert from moles to molarity, we need to divide the number of moles of solute by the volume of solution in liters.
First, we need to convert the volume of solution from milliliters to liters:
602 mL = 0.602 L
Now, we can calculate the molarity:
Molarity = moles of solute / liters of solution
Molarity = 0.152 mol / 0.602 L
Molarity = 0.252 M
Therefore, the molarity of the sucrose solution is 0.252 M.
Explanation:
3 CO + Fe₂O3 --->2 Fe + 3 CO2
what is the mole ratio of carbon monoxide reacting to the amount of
carbon dioxide being produced?
Answers
How many different genus groups are there? List them
Answers
Sometimes a fossil is formed as a result of the movement of an organism in soft sediment. Which of these are two kinds of trace fossils?
*
1 point
shells and bones
tracks and burrows
a bee and a beetle in amber
petrified and mummified fossils
Answers
Answer:The two kinds of trace fossils mentioned in the options are:
tracks
burrowsTracks and burrows are both examples of trace fossils, which are fossils thatprovide evidence of an organism's activity, rather than the organism itself.Tracks are impressions left by an organism's feet or other body parts as itmoved across soft sediment, while burrows are tunnels or other structurescreated by an organism as it burrowed into the sediment. Both types of tracefossils can provide valuable information about an organism's behavior, habitat, and interactions with other organisms.
I need help understanding how to do this, please. (50 points)
Using the determined equivalence point from question 2 and the balanced reaction of acetic acid and sodium hydroxide, calculate the molarity of the acetic acid in your hot sauce packet.
=Equivalence point= (7.46, 7.0)
=Mass of hot sauce (g)= 0.5 g
=Concentration of NaOH solution used (M)= 1 M
=Volume of NaOH solution used to neutralize the sauce (found by locating the equivalence point on the titration graph) (mL)= 7 mL
=pH of NaOH= 10.66
Answers
Molarity of a solution is an important method to calculate the concentration of a solution. The concentration of a solution can also be expressed by using another methods like normality, molality, etc. The molarity of acetic acid is
Molarity is defined as the number of moles of the solute present per litre of the solution.
Here 1 mole of acetic acid reacts with 1 mole of NaOH
Moles of NaOH is:
7 mL = 7 x 10⁻³L ₓ (1 mol / L) = 0.007 moles of NaOH = moles of CH₃COOH.
you can assume its density as 1g/mL. Thus, volume of 0.5 g of hot sauce is 0.5 mL = 5 x 10⁻⁴L
And molarity of the packet is:
0.007 moles acetic acid / 5 x 10⁻⁴L = 14 × 10⁻⁷ M
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H₂SO4what compound is this
Answers
Answer:
H₂SO₄ is sulfuric acid
Explanation:
H₂SO₄ is a chemical formula for sulfuric acid. It is a highly corrosive and dense liquid that is commonly used in many industrial processes, such as the production of fertilizers, dyes, detergents, and pharmaceuticals. Sulfuric acid is also used in car batteries and as a laboratory reagent.
1. Calculate the % H₂O for each of the following hydrated metal salts?
1. Molecular formula: CaSO4 * 2 H₂O, % water: ???
2. Molecular formula: CoCl2 * 6 H₂O, % water: ???
3. Molecular formula: CuSO4* 5 H2O, % water: ???
4. Molecular formula: MgSO4 * 7 H₂O, % water: ???
2. Based on your Experimental Calculations from the Data Sheet, what is the identity of
your unknown. (Choose from one of the four choices above).
3. What is the % error? (Use only one of your trials for your calculation.)
Answers
The percentage composition of the water of hydration for each compound is shown below.
Percentage of water of hydrationThe percentage of water of hydration, also known as percent water of crystallization, is a measure of the amount of water that is chemically bound to a salt or other compound as part of its crystal structure.
1) For CaSO4 * 2 H₂O
36/172 * 100/1
= 21%
For CoCl2 * 6 H₂O
108/238 * 100/1
= 45%
For CuSO4* 5 H2O
90/250 * 100/1
= 36%
For MgSO4 * 7 H₂O
126/246 * 100/1
= 51%
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In Activity 2, you tested various compounds for chemical changes. (Barium nitrate, sodium hydroxide, sodium hydrogen carbonate, copper (II) sulfate, potassium iodide, silver nitrate, iron (III) nitrate, and hydrochloric acid.) Write the chemical formulas for each of the reactants.
Answers
The chemical formulas are as follows:
Barium nitrate: Ba(NO₃)₂Sodium hydroxide: NaOHSodium hydrogen carbonate: NaHCO₃Copper (II) sulfate: CuSO₄Potassium iodide: KISilver nitrate: AgNO₃Iron (III) nitrate: Fe(NO₃)₃Hydrochloric acid: HClChemical formulas are shorthand notations used to represent the composition of a substance. In this case, the reactants used in Activity 2 are listed with their chemical formulas.
Barium nitrate is represented by the chemical formula Ba(NO₃)₂, which shows that it contains one barium ion (Ba²⁺) and two nitrate ions (NO₃⁻).
Sodium hydroxide is represented by the chemical formula NaOH, which shows that it contains one sodium ion (Na⁺) and one hydroxide ion (OH⁻).
Sodium hydrogen carbonate is represented by the chemical formula NaHCO₃, which shows that it contains one sodium ion (Na⁺), one hydrogen ion (H⁺), one carbonate ion (CO₃²⁻) and one hydrogen carbonate ion (HCO₃⁻).
Similarly, other reactants are represented by their respective chemical formulas.
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Which statement explains why germanium is a semiconductor while titanium
is a conductor?
O A. Titanium atoms have more electrons than germanium atoms.
OB. Germanium atoms have more electrons than titanium atoms.
C. Both elements allow electrons to move between atoms, but
germanium allows more movement of electrons than titanium
does.
O D. Both elements allow electrons to move between atoms, but
titanium allows more movement of electrons than germanium
does.
Answers
Answer:
B) Germanium atoms have more electrons than titanium atoms
Explanation:
Trust me I did this but for those who are hesitant
---> Conductors : It is a type of substance which conduct electricity that means it allow the electrons to flow through them.
Example of conductors are, iron, aluminium, gold, etc.
Insulators : It is a type of substance which does not conduct electricity that means it does not allow the electrons to flow through them.
Examples of insulators are, glass, rubber, ceramics, etc.
Semiconductors : It is a type of substance which conduct electricity under certain conditions that means it allow the electrons to flow through them. The conductivity level of semiconductors lie between the conductors and the insulators.
The good examples of semiconductors are silicon, germanium, gallium, and selenium.
In the given options, aluminium, gold are the metals which conduct electricity and concrete is an insulator which do not conduct electricity while the germanium is the good semiconductor.
N₂ +
H₂O →>>
NH, -
+
0₂
Answers
The balanced chemical equation for the reaction is:
N₂ + 3H₂O → 2NH₃ + O₂
The equation shows that nitrogen gas (N₂) and water (H₂O) react to form ammonia (NH₃) and oxygen gas (O₂). The coefficients in the balanced equation indicate that one molecule of N₂ reacts with three molecules of H₂O to produce two molecules of NH₃ and one molecule of O₂.
What is the rate of the reaction in L/min
Answers
The rate of the reaction is obtained from the calculation as 0.022 L/min.
What is the rate of reaction?We know that the rate of reaction has to do with the change in the volume or the concentration of one of the reactant which the volume of the oxygen have been chosen for the particular question that we are dealing with here.
Thus;
Rate of reaction = Change in the volume of oxygen/Time
= v2 - v1/t
= 0.35 L - 0.02 L/15 min
=0.022 L/min
Thus, we can see that the rate of the reaction can be obtained as 0.022 L/min.
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