Answer:
limiting reactant
Explanation:
The term that will be used to describe zinc in this case is limiting reactant.
A limiting reactant is a reactant that determines the amount of product formed in a chemical reaction. They are often stoichiometrically smaller of all the reactants in a reaction and once they are used up during, the reaction stops.
In this case, the zinc metal in the reaction is completely consumed, making the hydrochloric acid to be in excess. The zinc thus determines the amount of the products formed,
My car has a volume of 2600. L. On a nice spring day, the temperature outside is 20.0 degrees Celsius. If the pressure is 98.5 kPa, how many moles of gas are inside the car?
Answer : The number of moles of gas inside the car is, 105.0 mole.
Explanation :
To calculate the moles of gas we are using ideal gas equation.
[tex]PV=nRT[/tex]
where,
P = Pressure of gas = 98.5 kPa = 0.972 atm (1 atm = 101.3 kPa)
V = Volume of gas = 2600 L
n = number of moles of gas = ?
R = Gas constant = [tex]0.0821L.atm/mol.K[/tex]
T = Temperature of gas = [tex]20^oC=273+20=293K[/tex]
Now put all the given values in above equation, we get:
[tex]0.972atm\times 2600L=n\times (0.0821L.atm/mol.K)\times 293K[/tex]
[tex]n=105.0mol[/tex]
Therefore, the number of moles of gas inside the car is, 105.0 mole.
2 Points
Which of the following is described by the equation H2O(l) + heat → H2O(g)?
Calculate the number of moles of sodium chloride (NaCl) formed if 0.345
moles of calcium chloride (CaCl2) react.
1 Na2CO3 (aq) + 1 CaCl2 (aq) – 1 CaCO3 (s) + 2 NaCl (aq)
= ________ Moles ?
Answer : The number of moles of [tex]NaCl[/tex] formed are, 0.69 moles.
Explanation : Given,
Moles of [tex]CaCl_2[/tex] = 0.345 mol
Now we have to calculate the moles of [tex]NaCl[/tex]
The balanced chemical equation is:
[tex]1Na_2CO_2(aq)+1CaCl_2(aq)\rightarrow 1CaCO_3(s)+2NaCl(aq)[/tex]
From the balanced reaction, we conclude that
As, 1 mole of [tex]CaCl_2[/tex] react to give 2 moles of [tex]NaCl[/tex]
So, 0.345 mole of [tex]CaCl_2[/tex] react to give [tex]2\times 0.345=0.69[/tex] mole of [tex]NaCl[/tex]
Therefore, the number of moles of [tex]NaCl[/tex] formed are, 0.69 moles.
1 Na₂CO₃(aq) + 1 CaCl₂(aq) → 1 CaCO₃(s) + 2 NaCl(aq) = 0.690 moles.
If 0.345 moles of calcium chloride (CaCl₂) react, it will produce 0.690 moles of sodium chloride (NaCl) based on the balanced chemical equation provided.
This is derived from the 1:2 molar ratio between CaCl₂ and NaCl.To calculate the number of moles of sodium chloride (NaCl) formed from the reaction between calcium chloride (CaCl₂) and sodium carbonate (Na₂CO₃)we can use the balanced chemical equation: 1 Na₂CO₃(aq) + 1 CaCl₂(aq) → 1 CaCO₃(s) + 2 NaCl(aq)We start with the given number of moles of CaCl₂: 0.345 moles.From the balanced equation, we see that 1 mole of CaCl₂ produces 2 moles of NaCl.Therefore, if we have 0.345 moles of CaCl₂, we multiply by 2 to find the moles of NaCl:0.345 moles CaCl₂ × 2 moles NaCl / 1 mole CaCl₂ = 0.690 moles NaCl
So, 0.345 moles of calcium chloride will produce 0.690 moles of sodium chloride.
Correct question is: Calculate the number of moles of sodium chloride (NaCl) formed if 0.345 moles of calcium chloride (CaCl2) react.
1 Na2CO3 (aq) + 1 CaCl2 (aq) – 1 CaCO3 (s) + 2 NaCl (aq) = ________ Moles ?
Ammonia and copper(II) oxide react to form solid copper, water and nitrogen gas. What are the coefficients for the balanced chemical equations.
A: 2,2,2,1,1
B: 1,2,1,2,1
C: 1,3,3,3,1
Answer:
a
Explanation:
Answer:
i am also positive it is A
Explanation:
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What pressure will be exerted by 0.60 mol of CO2 when its temperature is 25 OC and it is in a 500 mL container?
Answer:
29.3 atm
Explanation:
We need to use the Ideal Gas Law to solve this problem: PV = nRT, where P is pressure, V is volume, n is moles, R is the gas constant, and T is the temperature in Kelvin.
Here, volume is V = 500 mL = 0.500 L; moles is n = 0.60 mol; R is 0.08206 atm/(mol * K); and temperature is T = 25 + 273 = 298 K. Plug these into the equation to solve for P:
P * (0.500 L) = (0.60 mol) * (0.08206 atm/mol * K) * (298 K)
P ≈ 29.3 atm
Hope this helps!
Describe the two processes of the carbon cycle
The two processes of carbon cycle are rapid carbon exchange and the long-term cycling of carbon.
What are the two process of carbon cycle?The carbon cycle consists of two interconnected processes: rapid carbon exchange among living organisms and the long-term cycling of carbon through geologic processes.
In the first process, photosynthesis consumes carbon dioxide and produces oxygen, while aerobic respiration consumes oxygen and produces carbon dioxide. These two processes play an important role in the carbon cycle.
In the second process, carbon is stored for long periods in carbon reservoirs such as the atmosphere, bodies of liquid water, ocean sediment, soil, land sediments, and the Earth's interior.
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During which stage of the cell cycle dies the cell condense chromosomes and break down the nuclear envelope
Answer:
Prophase
Explanation:
During prophase, the chromosomes condense, the nucleolus disappears, and the nuclear envelope breaks down.
Answer: It should be Prophase I am 100% sure
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.
Identify the 2 numbers given for each element
Each element in the periodic table has two numbers. The first is the atomic number that represents the number of protons in the nucleus. The second is the atomic weight that accounts for the average mass of the isotopes of the element.
Explanation:In the periodic table, each element is represented with two numbers. The larger number, usually found on top, is the atomic number, which signifies the number of protons present in the nucleus of the atom. The second number is the atomic weight or atomic mass, which is usually found at the bottom of the element symbol. It represents the average mass of the isotopes of that element, considering their abundance. For instance, for Carbon (C), the atomic number is 6 (protons) and the atomic weight is about 12.01 (protons + neutrons).
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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.
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How any moles of H2O will be produced from 12.3 moles of HCL reacting with Ca(OH)2?
Answer:
\large \boxed{\text{12.3 mol HCl}}
Explanation:
We need a balanced chemical equation with moles.
2HCl +Ca(OH)₂ ⟶ CaCl₂ + 2H₂O
n/mol: 12.3
The molar ratio is 2 mol H₂O:2 mol HCl.
[tex]\text{Moles of H$_{2}$O} = \text{12.3 mol HCl} \times \dfrac{\text{2 mol H$_{2}$O}}{\text{2 mol HCl}} = \textbf{12.3 mol HCl}\\\\\text{The reaction produces $\large \boxed{\textbf{12.3 mol HCl}}$}[/tex]
Assuming a stoichiometric relationship where 2 moles of HCl react with 1 mole of Ca(OH)₂ to produce 2 moles of H₂O, 12.3 moles of HCl would theoretically produce 12.3 moles of H₂O.
The question is about determining how many moles of H₂O will be produced from 12.3 moles of HCl reacting with Ca(OH)₂. To solve this, it's essential to know the chemical reaction involved. Unfortunately, the reaction between HCl and Ca(OH)₂, which typically forms CaCl₂ and H₂O, is not provided in full detail in the question. However, knowing that HCl reacts with base like Ca(OH)₂ to produce water and a salt, and typically in stoichiometric reactions involving a strong acid like HCl and a strong base like Ca(OH)₂, the ratio often is 2 moles of HCl react with 1 mole of Ca(OH)₂ to produce 2 moles of water (as a simplified approximation). While an exact reaction equation is necessary for a precise answer, if we assume the reaction follows a simple stoichiometry of 2HCl + Ca(OH)₂ → 2H₂O + CaCl₂, then for every 2 moles of HCl, 2 moles of H₂O are produced. Therefore, if 12.3 moles of HCl react completely with an adequate amount of Ca(OH)₂, they would produce 12.3 moles of H₂O, assuming the reaction goes to completion and all the HCl is used.
Which of the following might not have DNA in double-helix form?
A)A human
B)A bacterium
C)A bird
D)A tree
Answer:
B
Explanation:
Answer:
D.A tree
Explanation:
what is an energy sublevel
Answer:
A sublevel is an energy level defined by quantum theory.
Explanation:
In chemistry, sublevels refer to energies associated with electrons. In physics, sublevels may also refer to energies associated with the nucleus.
Answer:e
The level of energy possessed by all of the electrons in one type of orbital.
Explanation:
I took the test.
What is the pH when the poH value is 2?
Answer:
i hate my life PERIODT
Explanation:
WHY AM I HERE :/
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:
Which of the following statements is always TRUE for the freezing of water?
A. ΔS > 0
B. ΔS₍surr₎ > 0
C. ΔS₍universe₎ > 0
D. ΔG > 0
The always true statement for the freezing of water is that the entropy change of the universe (ΔSₙₙₕₑ) is greater than zero, signaling a spontaneous process.
Explanation:The statement that is always TRUE for the freezing of water is ΔSₙₙₕₑ > 0. During the freezing process, the system which is the water being frozen, undergoes a decrease in entropy (ΔS < 0) since the water molecules become more ordered. However, the entropy change of the surroundings (ΔSₙₙₕₑ) is positive because the heat rejected during freezing increases the entropy of the surroundings even more. As a result, the entropy of the universe increases (ΔSₙₙₕₑ > 0), making the overall process spontaneous as the second law of thermodynamics predicts that the entropy of the universe should increase in a spontaneous process.
Ammonium hydroxide is a weak base according to the Arrhenius definition. This means that ammonium hydroxide-
A.receives most of its H+ in solution.
B.gives up some of its Ht in solution.
C.receives most of its OH in solution.
D.gives up some of its OH in solution.
Answer:
D
Explanation:
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Ammonium hydroxide, a weak base, according to the Arrhenius definition, gives up some of its OH- ions in solution.
Explanation:Ammonium hydroxide is considered a weak base according to the Arrhenius definition beacause it dissociates in water to some extent and produces hydroxide ions (OH-). So, the correct choice in this case is (D) 'gives up some of its OH in solution'. It doesn't receive most of its H+ in solution, which makes options A and B incorrect, and it does not receive most of its OH- ions instead it donates them in the solution, making option C incorrect as well.
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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
When 100.g Mg3N2 reacts with 75.0 g H2O, what is the maximum theoretical yield of NH3?
Mg3N2(s) + 6H2O (l) → 3Mg(OH)2(aq) + 2NH3(g)
Answer choices:
1280 g
70.8 g
213 g
23.6 g
25.0 g
Answer : The correct option is, 23.6 g
Explanation : Given,
Mass of [tex]Mg_3N_2[/tex] = 100.0 g
Mass of [tex]H_2O[/tex] = 75.0 g
Molar mass of [tex]Mg_3N_2[/tex] = 101 g/mol
Molar mass of [tex]H_2O[/tex] = 18 g/mol
First we have to calculate the moles of [tex]Mg_3N_2[/tex] and [tex]H_2O[/tex].
[tex]\text{Moles of }Mg_3N_2=\frac{\text{Given mass }Mg_3N_2}{\text{Molar mass }Mg_3N_2}[/tex]
[tex]\text{Moles of }Mg_3N_2=\frac{100.0g}{101g/mol}=0.990mol[/tex]
and,
[tex]\text{Moles of }H_2O=\frac{\text{Given mass }H_2O}{\text{Molar mass }H_2O}[/tex]
[tex]\text{Moles of }H_2O=\frac{75.0g}{18g/mol}=4.17mol[/tex]
Now we have to calculate the limiting and excess reagent.
The balanced chemical equation is:
[tex]Mg_3N_2(s)+6H_2O(l)\rightarrow 3Mg(OH)_2(aq)+2NH_3(g)[/tex]
From the balanced reaction we conclude that
As, 6 moles of [tex]H_2O[/tex] react with 1 mole of [tex]Mg_3N_2[/tex]
So, 4.17 moles of [tex]H_2O[/tex] react with [tex]\frac{4.17}{6}=0.695[/tex] moles of [tex]Mg_3N_2[/tex]
From this we conclude that, [tex]Mg_3N_2[/tex] is an excess reagent because the given moles are greater than the required moles and [tex]H_2O[/tex] is a limiting reagent and it limits the formation of product.
Now we have to calculate the moles of [tex]NH_3[/tex]
From the reaction, we conclude that
As, 6 moles of [tex]H_2O[/tex] react to give 2 moles of [tex]NH_3[/tex]
So, 4.17 moles of [tex]H_2O[/tex] react to give [tex]\frac{2}{6}\times 4.17=1.39[/tex] mole of [tex]NH_3[/tex]
Now we have to calculate the mass of [tex]NH_3[/tex]
[tex]\text{ Mass of }NH_3=\text{ Moles of }NH_3\times \text{ Molar mass of }NH_3[/tex]
Molar mass of [tex]NH_3[/tex] = 17 g/mole
[tex]\text{ Mass of }NH_3=(1.39moles)\times (17g/mole)=23.6g[/tex]
Therefore, the maximum theoretical yield of [tex]NH_3[/tex] is, 23.6 grams.
The maximum theoretical yield of NH3 when 100.g Mg3N2 reacts with 75.0 g H2O is 23.6 g, as H2O is the limiting reactant.
Explanation:To determine the maximum theoretical yield of NH3, start by calculating the number of moles for both reactants. The molar mass of Mg3N2 is 100.93 g/mol, so you have 100 g / 100.93 g/mol = 0.991 moles of Mg3N2. The molar mass of H2O is 18.02 g/mol, so you have 75 g / 18.02 g/mol = 4.16 moles of H2O.
According to the stoichiometry of the reaction, Mg3N2 reacts with 6H2O to produce 2NH3. Thus, the moles of H2O is not enough to react with all the moles of Mg3N2, making H2O the limiting reactant. This means that the reaction will stop once all the H2O is consumed.
From the reaction stoichiometry, 6 moles of H2O produce 2 moles of NH3. So, 4.16 moles of H2O will produce (2/6)*4.16 = 1.39 moles of NH3. The molar mass of NH3 is 17.03 g/mol, so the maximum theoretical yield of NH3 is 1.39 moles * 17.03 g/mol = 23.6 g.
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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.
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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.
How many moles are in 12:31 grams if cI2?
Answer:
0.18 mol
Explanation:
the explanation is in the picture
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Hydrogen peroxide also called
Answer:
dihydrogen dioxide, hydrogen dioxide, hydrogen oxide, oxydol, peroxide, H2O
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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!
Because HCl is a strong acid and NaOH is a strong base, the equivalence point of the neutralization reaction occurs at pH ____.
ANSWER: 7
Answer:
yes, 7 is the correct answer.
Answer: 7
Explanation: Just did it.
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)
A student weighed 0.2440 grams of sample of a recently synthesized cobalt amine bromide compound. After dissolving in 120mL of acidified water, she added 2.55 grams of AgNO3 to precipitate any free Br-. The precipitate was found to weigh 0.3700 grams. Calculate the %Br- in the sample. MW Cl- 35.45 g/mol; MW Br- 79.91 g/mol; MW Ag 107.87 g/mol
The bromine percentage is 49.42 %
Explanation:
Mass of AgBr precipitated = 0.31 g
Molecular weight of AgBr = 187.77 g mol - 1
moles of AgBr = 0.31 g by 187.77 g mol - 1 = 0.0016509 moles
moles of Br ion = 0.0016509 moles
Mass of Br ion = 0.0016509 moles into 79.904 g mol - 1 = 0.1319 g
The Total mass of compound = 0.2669 g
Percentage of bromine = 0.1319 by 0.2669 = 49.42 percent
Hence the bromine percentage is 49.42 %
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.
Consider this reaction:
Which is the base in this reaction?
How many moles of H2SO4 do you have if there are 1.64x10^22 molecules of H2SO4
0.027 moles of [tex]H_{2} S_{} 0_{4}[/tex] if there are 1.64x[tex]10^{22}[/tex] molecules of [tex]H_{2} S_{} O_{4}[/tex]
Explanation:
Data given:
number of molecules of [tex]H_{2} S_{} 0_{4}[/tex] = 1.64 X [tex]10^{22}[/tex]
Atomic weight of the sulphuric acid = 98.07 grams/mole
We know that 1 mole of sulphuric acid has 6.022 x [tex]10^{23}[/tex] (Avagadro number) molecules.
so number of moles present in 1.64 X [tex]10^{22}[/tex] molecules is given by:
so to get moles we will use
number of moles = [tex]\frac{number of molecules given}{avagadro number}[/tex]
number of moles = [tex]\frac{1.64 X 10^{22} }{6.022 X 10^{23} }[/tex]
number of moles = 0.027 moles
So, 1.64 X [tex]10^{22}[/tex] molecules will be there in 0.027 moles of sulphuric acid.