Answer:
The answer is 74.5%.
Explanation:
As we know that % yield= [tex]\frac{actual yield}{theoretical yield}[/tex] x 100%.
Therefore,
Step 1 Calculate Theoretical yield:
0.112[tex]H_{2}[/tex] x [tex]\frac{1 mol H_{2} }{2.016 g of H{2} }[/tex] x [tex]\frac{4 mol H_{2}O }{4 mol H_{2} }[/tex] x [tex]\frac{18.02 g H_{2}O }{1 mol H_{2}O}[/tex] = 1.001 g [tex]H_{2}O[/tex]
Now Step 2
% yield = [tex]\frac{actual yield}{theoretical yield}[/tex] x 100% = [tex]\frac{0.745g}{1.001g}[/tex] = 74.5%
Final answer:
To calculate the percent yield, compare the actual yield of H2O (0.745 grams) to the theoretical yield determined by stoichiometry and molar masses of reactants and products.
Explanation:
The student is asking how to calculate the percent yield of a chemical reaction. In this chemical reaction, 0.112 grams of hydrogen (H2) produces 0.745 grams of water (H2O). To find the percent yield, first we need to calculate the theoretical yield based on the stoichiometry of the reaction; then we compare the actual yield (0.745 grams) to the theoretical yield. The theoretical yield is calculated using the molar mass of H2 and H2O, converting grams of H2 to moles, and then using the stoichiometry given by the balanced equation to find the moles of H2O produced. These moles are then converted back to grams. The percent yield is the (actual yield / theoretical yield) x 100%. The stoichiometry of 4H2O to 4H2 implies a 1:1 mole ratio. Using the molar mass of H2 (approximately 2.02 g/mol) and H2O (approximately 18.015 g/mol), we can calculate the theoretical yield and then the percent yield.
100 Points and Brainliest
A salt solution has a concentration of 200 g/L. How many grams of salt are contained in 500 mL of this solution?
Answer:
100 g
Explanation:
We know the concentration is 200 g/L.
Convert 500mL to L: 500mL/1000mL = 0.5 L
Now, multiply this by 200 to cancel out the L units and get grams:
200 g/L * 0.5 L = 100 g
Thus, the answer is 100 grams.
Hope this helps!
which cells from which parts of the body would likely need to use the most energy in a typical day?
Answer:
The muscle cell need to use most entry in a typical day
The cells that use most of the energy in a typical day are the cells of the brain, the cells of the heart, the cells of the lungs, the muscle cells, etc., and all the involuntary cells use the energy in a typical day because they do so spontaneously.
What is the energy usage of the cells?The body is made up of many different types of cells, some of which are voluntarily active and work while others are involuntarily work and always do their job. Even when a person is not doing much physical activity during the day, the cells of the heart (cardiac cells), brain, lungs, and other organs are constantly functioning and require continuous energy. When more physical work is done in a typical day, muscle cells or skeletal muscles require more energy and use more ATP to complete the work.
Hence The cells that use most of the energy in a typical day are the cells of the brain, the cells of the heart, the cells of the lungs, the muscle cells, etc.
Learn more about the cells here.
https://brainly.com/question/12129097
#SPJ2
EASY POINTS EASY QUESTION
Answer:just come up with somthing
Explanation:
Answer:
Air inside causes this
Explanation:
When it is not open the air is still compressed in it while when it is opened, the air has escaped
How does human activity affect earth systems, and how can our actions reduce environmental impacts?
Human activity affects Earth systems such as the atmosphere, hydrosphere, lithosphere, and biosphere, resulting in consequences such as climate change, soil erosion, and pollution. To reduce environmental impacts, individuals can conserve energy, reduce waste, use public transportation, and support sustainable practices. Governments and industries can also implement policies and technologies to promote sustainability.
Explanation:Human activity can have significant impacts on Earth systems, including the atmosphere, hydrosphere, lithosphere, and biosphere. For example, the burning of fossil fuels releases greenhouse gases into the atmosphere, contributing to climate change. Deforestation can lead to soil erosion and loss of biodiversity. Pollution from industrial and agricultural activities can contaminate water sources.
To reduce environmental impacts, individuals can take actions such as conserving energy by using energy-efficient appliances, reducing waste by recycling and composting, using public transportation or carpooling to reduce emissions, and supporting sustainable practices such as organic farming. Additionally, governments and industries can implement policies and technologies that prioritize renewable energy sources, promote sustainable land use, and regulate pollution.
Learn more about Impact of human activity on Earth systems here:https://brainly.com/question/33154874
#SPJ2
Which of the following individual actions would do the
most to reduce atmospheric methane?
The top individual action to curb atmospheric methane is reducing consumption of meat and dairy, as these industries are primary contributors to methane production. Also, minimising waste production can help, as waste decomposition in landfills generates considerable methane.
Explanation:The most effective individual action to reduce atmospheric methane is to reduce consumption of meat and dairy products. Methane is produced by digestive processes in ruminant livestock, such as cows, sheep, and goats. These animals are typically raised for meat and dairy production, so by reducing our intake, we can help decrease the number of these animals, and thus decrease the amount of methane produced. This also has the effect of reducing the amount of grain required for livestock feed, since less livestock would be raised. This grain could then be used more efficiently to feed humans directly. Additionally, reducing waste production can also help mitigate methane production, because waste decomposition in landfills is another major source of atmospheric methane.
Learn more about Methane Reduction here:https://brainly.com/question/29752052
#SPJ12
Reducing livestock agriculture, implementing sustainable grazing practices, and feeding livestock supplements to lower methane production are key actions for reducing atmospheric methane. Additionally, transitioning to clean energy and planting trees can contribute to lowering greenhouse gas concentrations.
Explanation:To reduce atmospheric methane, the most effective individual action would be decreasing livestock agriculture. Livestock, particularly ruminants like cows and goats, have microbiomes that produce methane during digestion. Additionally, implementing sustainable grazing practices and improving pasture management can mitigate carbon sequestration and offset methane emissions. Feed supplement programs that reduce methane production in livestock can also have significant impacts in reducing this potent greenhouse gas emission.
Another approach is to reduce activities that create anaerobic conditions conducive to methanogen growth, such as rice cultivation in flooded fields. Switching to clean energy sources like wind, solar, and hydropower, which do not emit methane, is also an effective strategy to combat global warming. Lastly, planting more trees can help absorb carbon dioxide, another greenhouse gas that works in tandem with methane to increase global temperatures.
Learn more about Reducing Atmospheric Methane here:https://brainly.com/question/30786790
#SPJ2
Which vessels have a larger space inside the blood vessel?
veins
arteries
capillaries
venules
Answer:
Arteries have a larger space inside blood vessels
An unknown white powder is added to a beaker of water and stirred. The powder disappears after a few seconds. This unknown powder is most likely made up of
Answer: This unknown powder is most likely made up of ionic bond.
Explanation:
An ionic compound is defined as the compound formed due to transfer of electrons between its atoms.
As we know that like dissolves like. Therefore, an ionic compound is readily soluble in a polar solvent like water.
Hence, when an unknown white powder is added to a beaker of water and stirred. The powder disappears after a few seconds because the white powder is ionic in nature and it is made up of ionic bond.
A sample of krypton has a volume of 6.00 L, and the pressure is 0.960 atm. If the final temperature is 55.0°C, the final volume is 7.70 L, and the final pressure is 1.25 atm, what was the initial temperature of the krypton?
193.38 K was the initial temperature of the krypton.
Explanation:
Data given:
Initial volume of the krypton gas = 6 litres
initial pressure of the krypton gas = 0.960 atm
initial temperature of the krypton gas = ?
final volume of the krypton gas = 7.70 litres
final pressure of the Krypton gas = 1.25 atm
final temperature of the krypton gas = 55 degrees or 273.25+55 = 323.15 K
Applying the Combined Gas Laws:
[tex]\frac{P1V1}{T1} = \frac{P2V2}{T2}[/tex]
Rearranging the equation:
T1 = [tex]\frac{P1V1T2}{P2V2}[/tex]
Putting the value in the equation:
T1 = [tex]\frac{0.960 X 6 X 323.15}{1.25 X 7.70}[/tex]
T1 = 193.38 K
Initial temperature of the krypton gas is 193.78 K
Small children are occasionally injured when they try to inhale helium from
a compressed helium tank. If a small child tries to transfer the contents of
a 50 L tank of helium at a pressure of 125 atm and a temperature of 20°
C into its lungs, how many moles of gas will it inhale?
Answer:
260 moles of Helium
Explanation:
V = 50L
T = 20°C = (20 + 273.15)K = 293.15K
P = 125 atm
R = 0.082 L.atm / mol. K
n = ?
From ideal gas equation,
PV = nRT
P = pressure of a given gas
V = volume it occupies
n = number of moles
R = ideal gas constant
T = temperature of the gas
PV = nRT
n = PV / RT
n = (125 * 50) / (0.082 * 293.15)
n = 6250 / 24.0383
n = 260.00 moles
The child inhaled 260 moles of Helium
Prepare a 0.50 L of a 1.0 M solution of potassium sulfate. Determine the amount of potassium sulfate needed in correct significant figures.
A) 68 g
B) 87 g
C) 270 g
D) 349 g
I can't figure out the answer.
Answer:
B) 87g
Explanation:
Usatestprep said it
Final answer:
To prepare 0.50 L of a 1.0 M solution of potassium sulfate, 87 g of the solute is needed. So the correct option is B.
Explanation:
To prepare a 0.50 L of a 1.0 M solution of potassium sulfate (K₂SO₄), first, we need to calculate the number of moles of the solute needed using the molarity equation, M = moles/L. For a 1.0 M solution, we need 1.0 mole of K₂SO₄ per liter. However, since we're preparing only 0.50 L, we need 0.50 moles of K₂SO₄.
Molar mass of K2SO4 = 2(K) + S + 4(O) = 2(39.10) + 32.07 + 4(16.00) = 174.27 g/mol.
Mass of K2SO4 needed = moles × molar mass = 0.50 moles × 174.27 g/mol = 87.135 g.
Using the correct significant figures, the mass of the solute needed is 87 g, which corresponds to option B.
Compare hydroelectric pumped storage to standard hydroelectric. The process of pumping water to a higher elevation, is equivalent to what
process in nature?
please help me
Pumped storage hydropower is a form of hydroelectric storage and they are used for electric power systems for load balancing.
Explanation:
It is a type of hydroelectric energy storage that contains two water reservoirs at different elevations which generates power in the water moves down through turbine and it takes the power as it pumps water to upper reservoir.
The altitude may diminish the pump's performance based on the principles of specific gravity, atmospheric pressure and oxygen deprivation.
The specific gravity and pressure based on altitudes suggests that water can be pumped up to 26 feet down when operating a pump at sea level because of atmospheric pressure. The depth shows that altitude increases because of decreasing atmospheric pressure. The pump operators are server to locate their pump close to the source of water you are pumping. The elevation impacts to suction lift.
A student is helping his mom make sweet tea. She wants the tea to be very sweet and very strong. Logan knows how to make changes so that they will dissolve better and faster. Which of the following would help make the sweet tea faster?
Question 8 options:
using cold water and letting the sugar cube sit
using crushed sugar, cold water, and letting the sugar sit
using sugar cubes, hot water, and letting the sugar sit
using crushed sugar, hot water, and stirring
a sample of nitrogen gas is at a temperature of 50.0 *C and at a pressure of 2.00 atm. if the volume of the sample remains constant and the pressure increases to 3.20 atm, what is the new temperature of the nitrogen gas?
Answer:
516.8 K or 243.8 C
Explanation:
- First figure out which gas law to use. In this case we need to use Gay-Lussac's law. This is P1/T1 = P2/T2.
- Next, we need to rearrange this to fit our problem. We should do...
T2 = T1P2/P1
- Now, we need to find our variables. For example...
T1 = 323 K
P1 = 2.00 atm
P2 = 3.20 atm
Next, fill in these numbers to fit our equation. For example...
T2 = 323 x 3.20 / 2.00 = 516.8 K
Note, you did not specify whether you wanted final answer in K or C, so I will put both. I suggest using K if nothing is stated for what they want.
- Hope this helps! If you need a more in-depth explanation please let me know.
Answer:244
Explanation:
Which statements describe the inheritance of traits? Select three options
Answer:
• All traits are inherited.
• Offspring inherit one allele for a gene from each parent.
• An offspring with two identical alleles for a trait is homozygous.
The specific environment in which an organism lives
O
Ecosystem
O
Organism
O
Competition
O
Population
O
Resources
An ecosystem is the specific environment in which an organism lives and includes the living and non-living components that organisms interact with. It's a site of competition for limited resources, influenced by numerous environmental variables, ultimately determining which organisms can exist within that ecosystem.
Explanation:The specific environment in which an organism lives is also referred to as its ecosystem. An ecosystem is a community of living organisms interacting with each other and their non-living (abiotic) environment. This can be as small as a tide pool or as vast as the Amazon Rainforest. These ecosystems are often sites of competition for limited resources, which include organic material, sunlight, and mineral nutrients. These resources are vital for an organism's survival and growth.
Competition arises both within species (intraspecific competition) and among different species (interspecific competition). This competition is driven by the theory of natural selection, where those organisms best adapted to their environment are more likely to survive and reproduce.
Other factors affecting an organism's life within an ecosystem include the ecosystem's physical and geographic environment, such as latitude, rainfall, topography, and available species. All these collectively decide which organisms can exist within a particular habitat.
Learn more about Ecosystem here:https://brainly.com/question/34849448
#SPJ6
What is a talent?
O
A. A natural ability to do something well
O
B. An acquired ability resulting from hard work
O
c. An unrefined ability that cannot be relied upon
O
D. An area of creative genius
SUBM
Talent is an acquired ability resulting from hard work. The correct option is B.
What is hard work?
The most important factor in achieving success is hard work. It is impossible to achieve success without putting in the effort.
A person who sits and waits for a better opportunity will never gain anything. A person who works hard can achieve success and happiness in life.
Hard work is the practice and preparation you put in to hone and improve your natural abilities and skills.
As a result, hard work gets you to the finish line ahead of the competition. Here's another example of how hard work outperforms talent.
The term talent refers to a person's innate and unique ability to do something. A skill is knowledge that a person gains through learning.
Thus, the correct option is B.
For more details regarding hard work, visit:
https://brainly.com/question/8367675
#SPJ5
A talent is a natural ability to do something well, although it often requires further development through practice. In acting, talent comprises intuitive skills like character understanding and captivating an audience, but like in all disciplines, this natural aptitude must be nurtured to achieve mastery and is complemented by creativity.
Explanation:A talent is commonly understood as a natural ability to do something well. It is an inherent aptitude that gives individuals a certain edge in specific tasks or skills without needing extensive training from the outset. However, it is important to recognize that while talent provides a foundation, the development and refinement of any skill, including those in the creative arts like acting, require practice and dedication. Within the context of acting, elements of talent might include an intuitive understanding of character, emotional depth, timing, and the ability to captivate an audience. Yet, these innate abilities must be honed through persistent effort and engagement with the craft. In relation to creativity, it is a form of intelligence that can be manifested in various disciplines and areas of life, not just limited to the arts. It involves bringing into existence new ideas, solutions, or methods, and a person's creativity can enhance their natural talents, be it in acting, design, direction, or any other artistic endeavor.
Learn more about talent here:https://brainly.com/question/32593108
#SPJ12
The absolute mass of a single atom can be obtained by
dividing the molar mass of that atom by what?
Answer:
Molar mass is the mass of a given substance divided by the amount of that substance, measured in g/mol. For example, the atomic mass of titanium is 47.88 amu or 47.88 g/mol. In 47.88 grams of titanium, there is one mole, or 6.022 x 1023 titanium atoms
Explanation:
Answer:
Avogadro's number
Explanation:
(that was the answer in my textbook)
Which of the following forms of matter can be classified as being
heterogeneous?
O
Suspensions
O
Solutions
Compounds
O
Elements
EnEDIL
What energy transformations occur when you are watching television?
Answer:
Electrical into sound and light
Answer:
When we turn on the television, electrical energy changes into light and sound. Even though undesirable, some amount of heat is also produced. When we move a vehicle, the engine converts the chemical energy stored in the fuel into heat, sound and kinetic energy.
How many moles are in 12:31 grams if cI2?
Answer:
0.18 mol
Explanation:
the explanation is in the picture
Please like and Mark as brainliest
what does the stonefish eat
Answer: reef fishes, small invertebrates and other marine animals
Explanation: Stonefish prey on reef fishes, small invertebrates and other marine animals which also make their home among the reefs. They're adept ambush predators, relying on their camouflage to lie in wait for their prey, before striking with their huge, powerful jaws, and swallowing their catch whole.
Please help me I really need help
Answer:20 million years ago
Explanation:
The by-product of the chlorination of an alkane is
The by-product of the chlorination of an alkane is HCl
Explanation:
Chlorination is the process of adding chlorine to drinking water to disinfect it and kill germs. Different processes can be used to achieve safe levels of chlorine in drinking water.Chlorination of alkane gives a mixture of different products. When consider mechanism of alkanes chlorination, free radicals are formed during the reaction to keep the continuous reaction. Different alkyl chloride compounds, extended carbon chains compounds and HCl are formed as products in product mixture.Chlorination byproducts, their toxicodynamics and removal from drinking water.Halogenated trihalomethanes (THMs) and haloacetic acids (HAAs) are two major classes of disinfection byproducts (DBPs) commonly found in waters disinfected with chlorine Chlorine is available as compressed elemental gas, sodium hypochlorite solution (NaOCl) or solid calcium hypochlorite (Ca(OCl)2Answer:
HCl
Explanation:
Can 1750 mL of water dissolve 4.6 moles of Copper Sulfate CuSO4? _________ Why? / Why not?
Answer:
No, you cannot dissolve 4.6 moles of copper sulfate, CuSO₄, in 1750mL of water.Explanation:
This question is part of a Post-Lab exercise sheet.
Such sheet include the saturation concentrations for several salts.
The saturation concentration of Copper Sulfate, CuSO₄, indicated in the table is 1.380M.
That means that 1.380 moles of copper sulfate is the maximum amount that can be dissolved in one liter of solution.
Find the molar concentration for 4.6 moles of copper sulfate in 1,750 mL of water.
You need to assume that the volume of water (1750mL) is the volume of the solution. This is, that the 4.6 moles of copper sulfate have a negligible volume.
1. Volume in liters:
V = 1,750 mL × 1 liter / 1,000 mL = 1.75 liter2. Molar concentration, molarity, M:
M = number of moles of solute / volume of solution in litersM = 4.6 moles / 1.75 liter = 2.6 MSince the solution is saturated at 1.380M, you cannot reach the 2.6M concentration, meaning that you cannot dissolve 4.6 moles of copper sulfate, CuSO₄ in 1750mL of water.
Adding solute to the saturated solution. will leave solids at the bottom of the container, without changing the concentration of the solution.
4.6 moles of Copper Sulfate cannot be dissolved in 1,750 mL of water. The reason why is because 4.6 moles of more than the 2.263 moles of Copper Sulfate that can be dissolved in 1,750 mL of water.Reasons:
The maximum solubility of copper sulfate, CuSO₄ in water at 20°C is 20.7 grams in 100 g of water;
Density of water, ρ = 997 kg/m³
[tex]\displaystyle \ The \ volume \ 100 \ g \ of \ water = \frac{0.1 \, kg}{997 \, kg/m^3} \approx 1.003 \times 10^{-4} \ m^3 = 100.3 \, ml[/tex]
The number of moles, n, of CuSO₄ in 20.7 grams is given as follows;
[tex]\displaystyle n = \frac{20.7 \, g}{159.609 \, g/mol} \approx 0.1296919 \, moles[/tex]
0.1296919 moles can be dissolved in 100.3 mL of water
Therefore;
[tex]1750 \, mL \ of \ water \ an \ dissolve\ \displaystyle \frac{0.1296919 \ moles}{100.3 \, mL} \times 1750 \, mL \approx 2.263 \ moles[/tex]
The maximum amount of copper sulfate that can be dissolved in 1,750 mL of water at 20°C is 2.263 moles.
Therefore;
1,750 mL of water cannot dissolve up to 4.6 moles of Copper Sulfate CuSO₄ at 20°This is so because the solubility of copper sulfate in 1750 mL of water is approximately 2.263 moles, which is less than the given 4.6 moles.
Learn more about solutes, solvents, and solubility here:
https://brainly.com/question/9545491
The reaction of C4H8 and Br2 to yield C4H2Br2 represents
Answer:
A Synthesis Reaction
Explanation:
A + B --> AB
Answer:
addition.
Explanation:
Eva pumps up her bicycle tire until it has a gauge pressure of 413 kilopascals. If the surrounding air is at standard pressure, what is the absolute pressure in the bicycle tire?
A.33.9 kPa
B.49.7 kPa
C.312 kPa
D.514 kPa
Top guy is wrong↑
#platofam
Select all the correct locations on the image.
Which elements are diatonic?
mg
n
s
f
he
ar
I
Answer:
I think the correct answer is f
100 POINTS!
Answer all below.
List 2 examples of a solution
Provide at least 2 characteristics of a solution to
differentiate it from a suspension and colloid.
List 2 examples of a suspension
Provide at least 2 characteristics of a suspension
to differentiate it from a solution and a colloid.
List 2 examples of a colloid.
Provide at least 2 characteristics of a colloid to
differentiate it from a solution and a suspension.
Answer:
1. Soap, and Detergent.
2.Maybe Alchohol, and Oil
3.chalk and water, and flour and water.
4. Air and fog
5.Whipped cream, and jelly
6. plaster and colored glass
How many moles of each element are in 1 mole of ammonium nitrate?
This is the formula for ammonium nitrate NH4NO3
Answer:
Of moles of NH4NO3 = 16/80 i.e. 0.2 moles of Ammonium Nitrate. 1 molecule of NH4NO3 contains 1 atom of N. Hence, 1 mole of NH4NO3 would contain 1 mole of Nitrogen atoms and therefore 0.2 moles of NH4NO3 should contain 0.2 moles of Nitrogen atoms.Explanation:
In 1 mole of ammonium nitrate (NH4₄NO₃), there are 2 moles of nitrogen, 4 moles of hydrogen, and 3 moles of oxygen.
The chemically correct formula for ammonium nitrate is NH4₄NO₃. When determining how many moles of each element are in 1 mole of ammonium nitrate, it is important to analyze the formula. Each molecule contains one nitrogen atom from the ammonium ion (NH4₄⁺) and one nitrogen atom from the nitrate ion (NO₃⁻), totaling two moles of nitrogen (N).
Additionally, there are four hydrogen atoms from the ammonium ion and no hydrogen from the nitrate ion, giving us four moles of hydrogen (H). Finally, the nitrate ion contains three oxygen atoms, thus there are three moles of oxygen (O). Therefore, 1 mole of ammonium nitrate consists of 2 moles of nitrogen, 4 moles of hydrogen, and 3 moles of oxygen.
Which expression is equivalent to (q Superscript 6 Baseline) squared?
q cubed
q Superscript 8
q Superscript 12
q Superscript 36
Answer:
The answer is c
Explanation:
The correct option is C). [tex]\(q^{12}\)[/tex] is equivalent to (q Superscript 6 Baseline) squared.
To find the expression equivalent to [tex]\((q^6)^2\)[/tex], we apply the exponentiation rule:
[tex]\[(q^6)^2 = q^{6 \cdot 2} = q^{12}\][/tex]
Therefore, [tex]\((q^6)^2\)[/tex] is equivalent to [tex]\(q^{12}\)[/tex].
Among the given options:
- [tex]\(q^3\)[/tex] is [tex]\(q^3\)[/tex],
- [tex]\(q^8\)[/tex] is [tex]\(q^8\)[/tex],
- [tex]\(q^{12}\)[/tex] matches [tex]\(q^{12}\)[/tex],
- [tex]\(q^{36}\)[/tex] is [tex]\(q^{36}\)[/tex].
The expression equivalent to [tex]\((q^6)^2\)[/tex] is [tex]\(q^{12}\)[/tex].