To determine the mass percent of FeO in the original mixture, we need to balance the equation for the reaction that takes place when the mixture is heated. The reaction between Fe3O4 and FeO to form Fe2O3 is as follows:
Fe3O4 + FeO --> Fe2O3
Next, we'll use the law of conservation of mass to balance the equation. According to this law, the total mass of the reactants must equal the total mass of the products.
We'll start by assuming that the number of moles of FeO in the mixture is 1.0. Then, the number of moles of Fe3O4 can be calculated as follows:
4.148 g Fe2O3 / (71.844 g/mol) = 0.058 mol Fe2O3
0.058 mol Fe2O3 / (1 mol FeO / 2 mol Fe2O3) = 0.116 mol FeO
0.116 mol FeO x (55.845 g/mol) = 6.468 g FeO
So, the mass of FeO in the original mixture was 6.468 g and the mass of Fe3O4 was 3.854 g - 6.468 g = -2.614 g.
The mass percent of FeO in the original mixture can be calculated as follows:
(6.468 g FeO / (6.468 g FeO - 2.614 g Fe3O4)) x 100% = 71.12%
So, the mass percent of FeO in the original mixture was 71.12%.
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What do we do with the extra 0.24 days each year upon the completion of Earth's revolution?
A. Every year on New Year's Day we get an extra 4 hours added to our day.
B. Nothing is done with them and our yearly calendar always has 365 days.
C. Every 4 years they are put together and we add one day to our yearly calendar.
D. We move our clocks back an hour in the fall and ahead an hour in the spring.
Answer:
C. Every 4 years they are put together and we add one day to our yearly calendar.
Answer:C. Every 4 years they are put together and we add one day to our yearly calendar (leap year).
Explanation:
which gases contribute to the greenhouse effect?nitrogen and heliumcarbon dioxide and methanecarbon dioxide and heliumnitrogen and methane
The gases that contribute to the greenhouse effect are carbon dioxide and methane.
What is greenhouse effect?The term "greenhouse effect" refers to the phenomenon that takes place when gases in the atmosphere of Earth capture heat from the sun. The result of this process is that the Earth is significantly warmer than it would be if its atmosphere did not exist. One of the factors that contributes to the fact that Earth is a suitable place to live is the greenhouse effect. Carbon dioxide, methane, nitrous oxide, hydrochlorofluorocarbons (HCFCs), hydrofluorocarbons (HFCs), and ozone in the lower atmosphere are the primary greenhouse gases whose concentrations are rising.
The natural greenhouse effect on Earth is being altered as a result of human activity. The release of more carbon dioxide into the atmosphere results from the combustion of fossil fuels such as coal and oil. The amount of carbon dioxide and other greenhouse gases in our atmosphere has been shown to be rising, according to observations made by NASA. An excessive amount of these greenhouse gases can cause the atmosphere of the Earth to trap more and more heat, which in turn causes the temperature of the Earth to rise.
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you are conducting the acetophenetidin reaction and just finished your hot gravity filtration. you notice that you have some activated carbon in your filtrate solution. what is the best way to address this problem?
Use a fresh funnel and fresh filter paper to repeat the hot gravity filtration.
The best way to address this problem is to perform a cold gravity filtration. This will allow the activated carbon to settle at the bottom of the container, making it easier to filter out. After the cold gravity filtration, you may also want to consider running the solution through a filter paper to remove any remaining activated carbon particles. Recrystallization is accomplished using hot gravity filtration. It is specifically used to clean the sample of any insoluble contaminants. The stemless funnel is ideal for this method because it prevents crystallization on the stem of the funnel (since stemless).
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the thermite reaction is performed using 8.6 g fe2o3 and 1.8 g powdered al metal. which reactant is in excess and by how much?
E. Fe2O3 ; 3.3 g is correct, Fe2O3 is the reactant and 3.3 g is excess .
The equation shows that for every 1.8 g of Al, 8.6 g of Fe2O3 is needed. Fe2O3 is an oxide of iron and is also known as ferric oxide or hematite. It is a red-brown material that is insoluble in water and is used in a variety of industrial applications.In this reaction, 1.8 g Al is used, meaning 8.6 g of Fe2O3 is needed. Since only 8.6 g of Fe2O3 is used, there is an excess of 3.3 g of Fe2O3.
Equation: 8.6 g Fe2O3 + 1.8 g Al → Al2O3 + 2Fe
Therefore 3.3g of the reactant Fe2O3 is excesss
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complete question:The thermite reaction is performed using 8.6 g Fe 2O 3 and 1.8 g powdered Al metal. Which reactant is in excess and by how much?
Fe2O3 + 2 Al → Al2O3 + 2Fe
A. Al; 0.3 g
B. Fe2O3; 2.0 g
C. Al; 2.1 g
D. Al; 1.1 g
E. Fe2O3; 3.3 g
what is the freezing point of a solution formed by dissolving 0.75 moles naphthalene in 2.0 kg benzene g
The freezing point of a solution is dependent on the concentration of solute particles in the solvent. The presence of solute particles in a solvent decreases its ability to freeze, and as a result, the freezing point of the solution is lowered.So, the freezing point of the solution would be lower than that of pure benzene by 1.91 °C.
The freezing point depression of a solution can be calculated using the equation:
ΔTf = Kf x molality
where ΔTf is the change in freezing point, Kf is the freezing point depression constant for the solvent, and molality is the concentration of solute particles in the solution expressed in moles per kilogram of solvent.
In this case, the solvent is benzene and its freezing point depression constant, Kf, is 5.12 °C/m. The molality of the solution can be calculated as follows:
molality = moles of solute / kilograms of solvent
= 0.75 moles / 2.0 kg
= 0.375 moles/kg
Substituting these values into the equation, we get:
ΔTf = 5.12 °C/m x 0.375 moles/kg
= 1.91 °C
So,the freezing point of the solution is 1.91 °C.
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what gas is produced in the reaction thus necessitating the need for loosely capped vials to allow it to escape?
The gas produced in the reaction thus necessitating the need for loosely capped vials to allow it to escape is nitrogen.
What are the main uses of nitrogen?
1. Fertilizer: Nitrogen is an essential nutrient for plants, and is often added to fertilizers to help plants grow.
2. Refrigerant: Nitrogen is used as a refrigerant in air conditioning and refrigeration systems.
3. Industrial Production: Nitrogen is used in a variety of industrial processes, such as the production of steel, rubber, plastics and other products.
4. Fuel: Nitrogen is used in the production of liquid fuels such as diesel and jet fuel.
5. Food Preservation: Nitrogen is used to preserve food by preventing the growth of bacteria and other microorganisms.
6. Medical: Nitrogen is used as a medical gas in the treatment of certain medical conditions.
When nitrogen is produced in a chemical reaction, it must be allowed to escape from the reaction vessel. If the reaction vessel is tightly capped, the pressure inside the reaction vessel will increase due to the presence of the nitrogen gas, which can cause the vessel to rupture. To prevent this from happening, the reaction vessel must be loosely capped to allow the nitrogen gas to escape.
Therefore, nitrogen is the correct answer.
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An element X after reacting with
Answer:
Magnesium + Hydrochloric Acid → Magnesium Chloride + Hydrogen
a container with rigid walls holds n moles of a monatomic ideal gas. part a in terms of n , how many moles of the gas must be removed from the container to double the pressure while also doubling the rms speed of the gas atoms? express your answer in terms of n .
A container with rigid walls holds n moles of a monatomic ideal gas. part a in terms of n. The number of moles of the gas to be removed is n/3.
The pressure of a monatomic ideal gas is proportional to its number of atoms, and the root-mean-square (rms) speed of its atoms is proportional to the square root of its temperature. Doubling the pressure and rms speed of the gas atoms requires a 4-fold increase in the temperature. To increase the temperature, we need to remove a certain number of moles of gas from the container.
Since the number of atoms in the container determines the pressure, removing moles of gas from the container reduces the pressure. To double the pressure, we need to remove half of the initial number of moles, or n/2 moles, from the container.
To also double the rms speed, we need to further remove n/4 moles, so that the final number of moles is n/4.
Thus, the total number of moles to be removed is n/2 + n/4 = n/3.
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7. From the following enthalpy changes,
Xe (g) + F2 (g) → XeF2 (s)
Xe (g) + 2F2 (g) → XeF4 (s)
calculate the value of AH° for the reaction XeF2 (s) + F2 (g) →→→ XeF4 (s).
AH° = -123 kJ
ΔΗ° = -262 kJ
In the standard enthalpy of formation, all the substances are represented in their standard states. The enthalpy of formation for the reaction is -139 kJ.
What is enthalpy of formation?The standard enthalpy of formation of a compound is defined as the enthalpy change accompanying the formation of one mole of the compound from its constituent elements.
In order to calculate the enthalpy of formation of XeF₄, we want XeF₂ on the reactant side. For this reverse the equation (1).
XeF₂ → Xe (g) + F₂ (g) ΔH = 123 J
By reversing, the sign of ΔH change as well.
Xe (g) and F₂ (g) of equation (1) cancels out with Xe and one of the F₂ of equation (2).
Now left is XeF₂ (s) + F₂ (g) → XeF₄ (s)
ΔH = 123 - 262 = -139 kJ
Thus the value of ΔH⁰ is -139 kJ.
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how many grams of NaCl would dissolve in water to make a 50 M solution with 500 mL final volume
Mass of NaCl that would dissolve in water to make a 50 M solution with 500 mL final volume is 1460 grams
To make a 50 M solution of sodium chloride (NaCl), the number of moles of NaCl required can be calculated using the formula:
moles of solute = concentration (M) x volume (L)
where volume is in liters. In this case, the concentration is 50 M and the volume is 0.5 L (500 mL).
moles of NaCl = 50 M x 0.5 L = 25 moles
Since the molecular weight of NaCl is 58.44 grams/mole, the mass of NaCl required can be calculated by multiplying the number of moles by its molecular weight:
mass = moles x molecular weight
mass of NaCl = 25 moles x 58.44 grams/mole = 1460 grams
So, 1460 grams of NaCl would dissolve in water to make a 50 M solution with a final volume of 500 mL.
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In the following acid-base reaction,
OH- is the
CH3NH2(g) + H2O(1)
→
CH3NH3(aq) + OH¯(aq)
Conjugate base
Acid
Conjugate acid
The base in the following chemical interaction is CH3NH2, which is methyl amine. It creates its conjugate acid, the methyl ammonium ion, when it receives a proton.
How is the conjugate base discovered?The conjugate base's formula is the acid's formula less one hydrogen. The base that reacts changes into its conjugate acid. The conjugate acid's formula is the base's formula adds one hydrogen ion.
Is ch3oh a base for Bronsted-Lowry?Because it is categorized as both a Lewis acid and a Bronsted-Lowry acid, methanol. It will become a Bronsted-Lowry acid as a result of the proton donation, and the methanol will also take electrons as a result.
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g a flask contains a mixture of 0.67 mol he and 4.46 mol ne gases. determine the partial pressure of ne (in mm) if the total pressure is 296 mm.
Partial pressure equals total pressure minus the mole fraction. It demonstrates how a component's mole fraction and partial pressure are related.
The partial pressure of Ne is what?Neon has a partial pressure of 0.4 atm, while krypton has a partial pressure of 1.20 atm. The mole fraction has no units. He and Ne gases together have a total pressure of 1.
If the overall pressure is 760 mmHg, what is the partial pressure of argon?7.6 mmHg As a result, it can be calculated that the partial pressures of the various gases at sea level, where the atmospheric pressure is 760 mmHg, are roughly 593 mmHg for nitrogen, 160 mmHg for oxygen, and 7.6 mmHg for argon.
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what percent of the global atmosphere is carbon dioxide (co2)? lab 5 and other subsequent labs have an emphasis on co2.
The percentage of the global atmosphere is the carbon dioxide that CO₂ is 0.04 %.
The CO₂ that is carbon dioxide makes up the only about 0.04% of the atmosphere, and the water vapor can vary the range from the 0 to 4%. The water vapor is the concentrated lower in atmosphere. The higher will be the greenhouse gas, the more effective will be the trapping heat from the Earth’s surface.
The burning of fossil fuels will affects the concentration of the CO₂ in the earth atmosphere. Before the industrial revolution, the amount of the carbon dioxide in the earth atmosphere was about the 288 ppm.
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simple bread recipe calls for
g of flour, 8 g of salt, 1 g of yeast, 400
and 0.3 L of water. The recipe
produces 1 loaf of bread. The data
table shows the amounts of
each ingredient you have. Identify the
limiting reagent. What is the
theoretical yield, assuming you could
make partial loaves? How many
whole loaves of bread can you actually
make? What is the percent
yield? How much of each ingredient do
you have left over?
We would produce a loaf of bread, the limiting reagent is water and the percent yield is 30%
What is the limiting reagent?The limiting reagent, also known as the limiting reactant, is the reactant that determines the maximum amount of product that can be formed in a chemical reaction. It is the reactant that is completely consumed first and therefore determines the amount of product that can be formed.
Since we have 0.3 g of the water, the theoretical yield would now be;
0.3 g/1 g * 100/1
= 30 %
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what occurs when ice melts? responses a physical change a physical change an atomic compound is newly formed. an atomic compound is newly formed. a nuclear change a nuclear change a chemical change
When ice melts a physical change occur. The correct answer is A.
The capacity to flow gives an ice cube the ability to alter shape as it melts. Its makeup stays the same, though. One instance of a physical change is melting. A physical change is when a sample of matter experiences a change in some of its qualities but not in its identity.
A reversible change in the substance's or object's physical characteristics can be referred to as the physical change. It is a physical change when ice melts. Water (H₂O) appears to alter when it turns from a liquid state to a solid state (ice). However, this shift is just physical, as the constituent molecules still consist of 11.19% hydrogen and 88.81% oxygen by mass.
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a compound has the empirical formula c2h4s. its molecular weight is 120 g/mol. identify the molecular
The molecular formula of the compound with empirical formula C2H4S and molecular weight of 120 g/mol is C6H12S2.
The empirical formula represents the simplest ratio of atoms in a compound. It is determined from the elemental analysis of the compound. The molecular weight of the compound is the sum of the atomic weights of all the atoms in the molecular formula. To find the molecular formula, the molecular weight is used to determine the number of atoms in the empirical formula.
In this case, the molecular weight of 120 g/mol can be used to find the molecular formula by dividing the molecular weight by the empirical formula weight. The empirical formula weight of C2H4S is 40 g/mol, which means that the molecular formula must have a weight of three times the empirical formula weight, or 120 g/mol.
This leads to the molecular formula of C6H12S2, which has a molecular weight of 120 g/mol.
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what is the poh of 2.95 m ba(oh)2 solution? is the solution neutral, acidic, or basic? the poh of the solution is: g
Three often used definitions of bases in chemistry are Arrhenius bases, Bronsted bases, and Lewis bases. pOH is equal to -log (OH-)/-log (3.67 x 10-5)/-log (4, 44).
Bases are substances that interact with acids, as stated by all definitions, and as G.-F. Rouelle initially proposed in the middle of the 18th century. In 1884, Svante Arrhenius stated that a base is a substance that, in an aqueous solution, separates into Hydroxide ions (OH). These ions can mix with hydrogen ions (H+), which are formed during the dissociation of acids, to form water in an acid-base process. Therefore, a base was a metal hydroxide, such NaOH or Ca (OH)2. Additionally, these aqueous hydroxide solutions have a few distinctive qualities. The answer is rather straightforward. The solution is basic with a pOH of 4, 44. The amount of OH (hydroxyl) ions in the solution is determined by the pOH value.
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in non-ionized hydrogen, for instance, what does a higher orbital state have more of than a lower orbital state?
In non-ionized hydrogen, a higher orbital state refers to an electron in a higher energy level or shell.
What are orbital states?
Orbital states in physics and chemistry define the energy and position of an electron in an atom. An electron in an atom is typically described by its orbital state, which includes the energy level, the angular momentum, and the magnetic moment of the electron.
In a hydrogen atom, for example, an electron can occupy different energy levels or shells, which correspond to different orbital states. Each orbital state is characterized by a unique set of quantum numbers that describe the energy, angular momentum, and magnetic moment of the electron in that state.
In comparison to a lower orbital state, a higher orbital state has a higher energy and is farther away from the nucleus of the hydrogen atom.
The main difference between a higher and lower orbital state is their energy and the distance between the electron and the nucleus. Electrons in higher orbital states have more energy and are farther away from the nucleus than those in lower orbital states. This means that electrons in higher orbital states are less likely to be held by the positively charged nucleus and are therefore more likely to participate in chemical reactions or interactions with other atoms.
So, In non-ionized hydrogen, a higher orbital state refers to an electron in a higher energy level or shell.
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Comparing the grams of each reactant needed to the number of grams actually used in the lab, the limiting reaction is _______ and the excess reaction is _________.
Answer:
The limiting reactant is the reactant that is completely consumed first in a chemical reaction and the excess reactant is the reactant that remains after the limiting reactant is used up.
suppose that aqueous solutions of cesium hydroxide and iron nitrate are mixed. what is the name of the compound or compounds that precipitate?
When aqueous solutions of cesium hydroxide (CsOH) and iron nitrate (Fe(NO3)2) are mixed, a reaction occurs resulting in the precipitation of a compound. The chemical reaction is as follows:
CsOH + Fe(NO3)2 -> CsNO3 + Fe(OH)2
The precipitate that forms is Fe(OH)2, which is ferrous hydroxide. This compound is an insoluble salt that separates from the solution as a solid.
The solubility of Fe (OH)2 depends on the conditions of the reaction, including the concentration of the reactants, the temperature, and the pH of the solution. In general, Fe (OH)2 is not very soluble in water, so it readily forms a precipitate when it is produced in excess.
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a pot contains 9 l of brine at a concentration of 110 g/l. how much of the water should be boiled off to increase the concentration to 220 g/l?
4.95 liters of water need to be boiled off to increase the concentration of the brine to 220 g/l.
When the solution will boil, only the solvent will be converted to gas. The solute remains in the solution, so its amount does not change but the concentration does.
The total amount of the solute = 110 g/l * 9 l = 990 g
Inorder concentration = 220 g/l
The amount of the water that should be boiled off = 990 g / (220 / 110)
= 990 g / 2
= 4.95 liters
So, 4.95 liters of water need to be boiled off to increase the concentration of the brine to 220 g/l.
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Are group 1 metals chlorides bases?
Answer: True I guess
Explanation: I’m new here but I guess it’s it’s true?
how many ml of 1.5 m naoh are required to neutralize 220 ml 0.8 m hcl? select one: a. 94.6 ml b. 144.8 ml c. 117.3 ml d. 180.1 ml
It takes 117.3 ml NaOH to neutralize 220 ml and 0.8 M HCl.
The dilution process is a process carried out by mixing a solvent that is larger than the substance it is dissolving. In principle, dilution only adds solvent, so that the number of moles of solute before dilution is the same as the number of moles of solute after dilution.
Formula:
V₁ × M₁ = V₂ × M₂
Information:
M₁ = Molarity of the solution before dissolution/dilution
V₁ = Volume of solution before dissolution/dilution
M₂ = Molarity of the solution after dissolution/dilution
V₂ = Volume molarity of the solution after dissolution/dilution
In the given question
M₁ = 1.5 M
V₂ = 220 ml
M₂ = 0.8 M
So, the required volume of NaOH is
V₁ × M₁ = V₂ × M₂
V₁ × 1.5 = 220 × 0.8
V₁ × 1.5 = 176
V₁ = 176/1.5
V₁ = 117.3 ml NaOH
So, the correct answer is C.
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2 C8H18 + 25 O2 > 16 CO2 + 18 H2O how many moles of O2 are needed to react fully with 4 moles of octane
Answer:
100 moles of O2 are needed to react fully with 4 moles of octane.
Explanation:
Answer:
50
Explanation:
To find the number of moles of O2 needed to react fully with 4 moles of octane (C8H18), we need to balance the equation first:
2 C8H18 + 25 O2 -> 16 CO2 + 18 H2O
So, the balanced equation tells us that for every 2 moles of C8H18, 25 moles of O2 are needed. Thus, to react with 4 moles of C8H18, we need 25 * (4/2) = 50 moles of O2.
JUST 43 PLEASE
Consider a solution contains both c5h5n and c5h5nhno3. Calculate the ratio [c5h5n]/[c5h5nhno3+] if the solution has the following pH values
The pOH expresses the hydroxide ion concentration of a solution. We can find out the value of pOH from the given values of pH.
What is pH?The pH of a solution is defined as the negative logarithm to the base 10 of the value of hydronium ion concentration in moles per litre.
pH = -log [ H₃O⁺]
pH + pOH = 14
According to Henderson Hasselbalch equation:
pOH = pKb + log [C₆H₅NH⁺] / [C₆H₅N]
a. pOH = 14 - 4.50 = 9.5
9.5 = 9.42 + log [C₆H₅NH⁺] / [C₆H₅N]
log [C₆H₅NH⁺] / [C₆H₅N] = 0.08
[C₆H₅NH⁺] / [C₆H₅N] = 1.20
[C₆H₅N] / [C₆H₅NH⁺] = 0.83
b. pOH = 8.77
-0.65 = log [C₆H₅NH⁺] / [C₆H₅N]
[C₆H₅NH⁺] / [C₆H₅N] = 0.22
[C₆H₅N] / [C₆H₅NH⁺] = 4.54
c. pOH = 9
-0.42 = log [C₆H₅NH⁺] / [C₆H₅N]
[C₆H₅NH⁺] / [C₆H₅N] = 0.38
[C₆H₅N] / [C₆H₅NH⁺] = 2.63
d. pOH = 8.5
-0.92 = log [C₆H₅NH⁺] / [C₆H₅N]
log [C₆H₅NH⁺] / [C₆H₅N] = 0.12
[C₆H₅N] / [C₆H₅NH⁺] = 8.33
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if 17.3 g of ammonia is produced by the reaction of 20.2 g of nitrogen with an excess of hydrogen, what is the percent yield of the reaction?
The theoretical yield of the reaction is 17.3 g of ammonia. The percent yield of the reaction is 85.6%.
This means that 85.6% of the theoretical yield of ammonia (17.3 g) was actually produced in the reaction.
The percent yield of a reaction can be calculated by dividing the actual yield of the reaction (in grams) by the theoretical yield (in grams) and multiplying by 100%. This number is a useful metric for determining the efficiency of a reaction, as it tells us how much of the theoretical yield was actually produced in the reaction. Additionally, it can be used to compare the efficiency of different reactions, as it allows us to compare the actual yields of different reactions.
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When 16.68 grams of methane (CH4) are burned (see equation below), how many moles of oxygen gas (O2) will be used? Please round your answer to two digits after the decimal point and don't forget units and substance!
CH4 + 2 O2 --> CO2 + 2 H2O
Please help me with this! thank you a bunch in advance!!
When 16.68 grams of methane (CH4) are burned. Therefore, 2.06moles of oxygen gas will be used.
What is mole?A mole is merely a measuring unit. In reality, it is one of the International System of Units' seven foundation units (SI). When basically determines are insufficient, new units are created.
Chemical reactions frequently occur at levels that use grams would be inappropriate, but using actual figures of atoms/molecules/ions could also be misleading. As a result, scientists devised the moles to bridge the divide between extremely small and extremely huge numbers.
CH[tex]_4[/tex] + 2 O[tex]_2[/tex] [tex]\rightarrow[/tex]CO[tex]_2[/tex]+ 2 H[tex]_2[/tex]O
moles of methane = 16.68 /16.04=1.03moles
the mole ratio between methane and oxygen is 1:2
mole of oxygen = 2×1.03=2.06moles
Therefore, 2.06moles of oxygen gas will be used.
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how many moles and how many grams of kmno4 are needed to carry out this reaction on 11.4 grams of kno2
0.0451 moles of KMnO4 and 7.18 grams of KMnO4 are required to produce 11.4 grams of KNO3.
The chemical equation for the reaction is
5 KNO₂ + 2KMnO₄ + 3 H₂SO₄ →5 KNO₃ + K₂SO₄ + MnSO₄ + 3 H₂O
From the equation, we see that for every 5 moles of KMnO2, 5 moles of KNO3 are produced, and for every 2 moles of KMnO4, 5 moles of KNO3 are produced.
Determine the number of moles of KNO3 produced, which can be calculated from the mass of KNO3 (11.4 g) and its molar mass (101.1 g/mol):
11.4 g KNO3 / 101.1 g/mol = 0.1129 moles KNO3
Since 5 moles of KMnO2 produce 5 moles of KNO3, 2 moles of KMnO4 produce 5 moles of KNO3.
This means that for every 0.1129 moles of KNO3, 0.1129 moles / (5/2) = 0.0451 moles of KMnO4 are required.
Convert the number of moles of KMnO4 to mass by multiplying by its molar mass (158.0 g/mol):
0.0451 moles KMnO4 * 158.0 g/mol = 7.18 g KMnO4
How do you convert moles to mass?
Multiply the molecular weight by the number of moles for the substance. The molecular weight is the number of grams per mole for the substance and gives the conversion factor for moles to grams for that particular substance.
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if 5 half-lives have gone by and you have .03125 grams of an unstable parent substance, how many grams of stable daughter product should you have?
Answer:
Explanation:
The amount of daughter product that should be present after 5 half-lives depends on the specific radioactive decay process involved and the initial amount of the parent substance. In general, after each half-life, the amount of the parent substance decreases by half, and the corresponding amount of the daughter product increases by half.
In this case, with 5 half-lives gone by, the amount of the parent substance should have decreased by a factor of 2^5 = 32. Hence, the amount of the parent substance should be .03125/32 = 0.0009765625 grams.
Since the amount of daughter product is proportional to the amount of the parent substance that decays, the amount of daughter product should be 0.0009765625 * 32 = 0.03125 grams.
a flask contains four gases: ch4, o2, c2h5, and n2. when the stopper is removed, which gas will diffuse the fastest? responses c2h5 uppercase c subscript 2 end subscript uppercase h subscript 5 end subscript o2 uppercase o subscript 2 end subscript ch4 uppercase c h subscript 4 end subscript n2
The gas that will diffuse the fastest is O2 (oxygen). Gases diffuse from areas of high concentration to areas of low concentration. Oxygen has a relatively small molecular size compared to the other gases.
So, it is more likely to move quickly through the container and escape through the opening. Methane (CH4) and Ethane (C2H5) are larger, and thus will diffuse slower than oxygen.
Nitrogen (N2) is an even larger gas, and it will diffuse the slowest of all the gases in the flask.
Methane is a chemical composite with the chemical formula CH₄. It is a group-14 hydride, the simplest alkane, and the main basic of natural gas.
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