This problem is describing a chemical reaction between 3.57 g of nitrogen and excess hydrogen in order to produce ammonia, whose actual yield is given as 3.68 g and the balanced chemical equation, theoretical yield and percent yield are required and found to be [tex]N_2+3H_2\rightarrow 2NH_3[/tex], 4.34 g and 85.0 %, respectively, as shown below:
Stoichiometry:In chemistry, a compelling tool to deal with chemical amounts, such as moles and grams, is stoichiometry which is based on the arrangement of conversion factors including molar masses and mole ratios. However, one first must balance the involved chemical equation, which for this question is:
[tex]N_2+3H_2\rightarrow 2NH_3[/tex]
In such a way, since 3.57 g of nitrogen are given, one can calculate the theoretical yield of ammonia via the following stoichiometric setup:
[tex]3.57gN_2*\frac{1molN_2}{28.01gN_2} *\frac{2molNH_3}{1molN_2} *\frac{17.03gNH_3}{1molNH_3} =4.34gNH_3[/tex]
Whereas the molar mass of nitrogen is 28.01 g/mol and ammonias 17.03 g/mol and the mole ratio between these two is 2:1 according to the coefficients in the balanced chemical equation.
Finally, we calculate the percent yield by dividing the given actual yield, 3.68 g by the formerly calculated theoretical yield, 4.34 g:
[tex]Y=\frac{3.68g}{4.34g} *100\%\\\\Y=85.0\%[/tex]
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What happens to carbon in plants when the plants die.
Answer:
Released into the atmosphere
Explanation:
The carbon that the plant had been storing when it was alive, would be released upon death into the soil
31. Which of the following behaves as acid only?
A. HCO3-
B. NH4+
C. HSO4-
D. CH3COO-
Answer:
A. HCO3- is the answer.
Explanation:
HCO3- acts as an acid in the presence of OH- but as a base in the presence of HF.
A radioactive isotope decayed to 17/32 of its original mass after 60 minutes. Find the half-life of this radioisotope.
The half life of the isotope is 60 minutes.
What is half life?The term half life refers to the time taken for an isotope to decay to half of its original amount. In order to find the half life of the isotope, we can use the formula;
N/No =(1/2)^t/t1/2
Where;
N = mass of the isotope at time t
t = time taken
t1/2 = half life of the isotope
No = mass of the isotope originally present
Hence;
17/32 = (1/2)^60/t1/2
(0.5)^1 = (0.5)^60/t1/2
1 = 60/t1/2
t1/2 = 60 minutes
The half life of the isotope is 60 minutes.
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What is the name of scientist who discovered the arrangement of the periodic table?.
Which chemical or physical change is a endothermic process
Answer:
Examples of physical endothermic processes: The melting of ice, the evaporation of water.
PLS MARK ME BRAINLIEST
Explanation:
Can some help me please?
Answer:
159.7 g Fe2o3/1 mol Fe2o3
Explain Any differences in the pulse rate at rest and after rest ( in your own words)
Explanation:
at rest the pulse rate will be so hard to detect while after rest it will be so easy to read the pulse I guess.
When an atom loses electrons, it is called a (an) _____ and has a ______ charge.
Answer:
Ion and a Positive Charge. :)
Explanation:
Hope this helps have a nice day! :D
In a gas, the distance between the particles is A) very close relative to the size of the molecules. B) close relative to the size of the molecules. C) fixed relative to the size of the molecules. D) small relative to the size of the molecules. E) very large relative to the size of the molecules. 38. On a heating curve a plateau corresponds to
Explanation:
Letter B .... hope this explanation will help
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What makes individuals have a negative or positive at the end of their blood type. Example: A + or A-
Group of answer choices
DNA
Rh Factor
Environment born in
Blood transfusion
Rh Factor determines whether an individual will be blood type positive or negative. The presence of the Rh factor means that you will have a positive blood type while not having it means that your blood type will be negative.
If you have a mole of carbon atoms, how many atoms do you have?
Answer:
6.02×10^23 atoms
Explanation:
Avogadros constant is a number that states the amount of atoms in one mole of a substance which is 6.02×10^23 to 3 significant figures.
Strigol is an important plant hormone that is released by crops such as rice and sugarcane. Unfortunately for these plants, strigol also activates the germination of any nearby witchweed seeds, resulting in the destruction of the crops by the parasitic weed. Strigol has nineteen carbon atoms. Determine the HDI of strigol, as well as its molecular formula. Strigol has four rings and five double bonds, for a total hydrogen deficiency index of 10 . If saturated, a compound with 19 carbon atoms would have 40 hydrogen atoms, but an HDI of 10 means that 20 hydrogen atoms are missing. So there must be 20 hydrogen atoms in the formula. Inspection of the structure also reveals 6 oxygen atoms, so the molecular formula of strigol must be C 19 H 20 O 6 .
The hydrogen deficiency index( HDI) of strigol is = 10
How to calculate HDI:The hydrogen deficiency index is used to measure the number of degree of unsaturation of an organic compound.
Strigol is an example of an organic compound because it contains carbons and hydrogen.
To calculate the HDI using the molecular formula given (C19H20O6) the formula for HDI is used which is:
[tex]hdi = \frac{1}{2} (2c + 2 + n - h - x)[/tex]
where C = number of carbon atoms = 19
n= number of nitrogen atoms = 0
h= number of hydrogen atoms = 20
X = number of halogen atoms = 0
Note that oxygen was not considered because it forms two bonds and has no impact.
There for HDI =
[tex] \frac{1}{2} (2 \times 19 + 2 + 0 - 20 - 0)[/tex]
HDI=
[tex] \frac{1}{2} (40 - 20)[/tex]
HDI =
[tex] \frac{1}{2} \times 20[/tex]
HDI = 10
Therefore, the hydrogen deficiency index of strigol is = 10
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4. How many joules of heat are absorbed to raise
the temperature of 37 grams of water from 25°C
to 75°C?
. How many joules of heat are absorbed to raise
the temperature of 37 grams of water from 25°C
to 75°C?
Ozone molecules contain 2 oxygen atoms, while the oxygen that we breathe has three.
True
False
Answer:
false
Explanation:
ozone has 3 oxygen atoms
What is the source of energy in fusion and fission reactions.
Answer:
Sun's energy
Explanation:
because Without the energy produced by the fusion of hydrogen in the sun, the Earth would quickly change into a cold planet that could not support life as we know it.
The primary source of energy of nuclear reactions is the fusion reactions of hydrogen taking place in the sun.
What are nuclear reactions?There are two types of nuclear reactions which are nuclear fusion and nuclear fission .They involve the combination and disintegration of the element's nucleus respectively.
In nuclear fission, the nucleus of the atom is bombarded with electrons of low energy which splits the nucleus in to two parts .Large amount of energy is released in the process.It is used in nuclear power reactors as it produces large amount of energy.
In nuclear fusion,on the other hand, is a reaction which occurs when two or more atoms combine to form a heavy nucleus.Large amount of energy is released in the process which is greater than that of the energy which is released in nuclear fission process.
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What does it mean when it is said that “mass is conserved”?
Answer:
The law of conservation of mass states that mass in an isolated system is neither created nor destroyed by chemical reactions or physical transformations. According to the law of conservation of mass, the mass of the products in a chemical reaction must equal the mass of the reactants.
Explanation:
In physics and chemistry, the law of conservation of mass or principle of mass conservation states that for any system In physics and chemistry, the law of conservation of mass or principle of mass conservation states that for any system closed to all transfers of matter and energy, the mass of the system must remain constant over time, as the system's mass cannot change, so quantity can neither be added nor be removed to all transfers of matter and energy, the mass of the system must remain constant over time, as the system's mass cannot change, so quantity can neither be added nor be removed
The catalytic converter of a secondary air injection system converts the hydrocarbons and carbon monoxide to _______ and _______.
The catalytic converter of a secondary air injection system converts the hydrocarbons and carbon monoxide to carbon dioxide (CO2) and water (H2O). It is a fundamental part of a vehicle.
Catalytic converter and air injection systemsA catalytic converter refers to the device observed in a car and/or vehicle, which is used to remove different contaminant gases.
In general, the catalytic converter is placed close to the car engine and reduces the release of hydrocarbons.
In general, the air injection system is connected to the catalytic converter in order to provide useful oxygen required for oxidation reactions.
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This atom tends to gain an electron in its outer shell so that there are a total of 8 electrons. - The atoms of this element lose one electron and become cations. - The atoms of this element all have one proton. - __________ atoms all have 2 protons. A. Sodium B. Chlorine C. Helium D. Hydrogen
Answer:
D. Helium
Explanation:
By definition, the atomic number of an element is the number of protons in its nucleus. 2 protons mean atomic number 2: Helium.
As the number of protons and electrons are same in an atom,helium atoms all have 2 protons.
What is an atom?An atom is defined as the smallest unit of matter which forms an element. Every form of matter whether solid,liquid , gas consists of atoms . Each atom has a nucleus which is composed of protons and neutrons and shells in which the electrons revolve.
The protons are positively charged and neutrons are neutral and hence the nucleus is positively charged. The electrons which revolve around the nucleus are negatively charged and hence the atom as a whole is neutral and stable due to presence of oppositely charged particles.
Atoms of the same element are similar as they have number of sub- atomic particles which on combination do not alter the chemical properties of the substances.
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7. Electricity we use in our homes is supplied from a ______
pls help 15 pts
Answer:
The electricity that flows to our homes is generated in power stations. From here, it flows through large transmission lines, which carry it to substations. Finally, distribution lines carry electricity from substations to houses, businesses, and schools like yours!
Explanation:
Answer:
The electricity that flows to our homes is generated in power stations. From here, it flows through large transmission lines, which carry it to substations. Finally, distribution lines carry electricity from substations to houses, businesses, and schools like yours!
Explanation:
I get this from a professional
AHELP HELP HELP PLZZZZZZ
Answers:
25. Earth's galaxy
26. The asteroid belt
27. Copernicus
28. Ptolemy
if this helped brainliest
What is the atomic number of a sodium atom that has 11 protons and 12 nucleus
Answer:
The Atomic Number is 11
Explanation:
The following balanced equation shows the decomposition of ammonia (NH3) into nitrogen (N2) and hydrogen (H2). 2NH3 → N2 3H2 A quantity of NH3 decomposes to produce 0. 0351 mol N2. How many moles of H2 are produced? 0. 0351 mol H2 0. 0117 mol H2 0. 105 mol H2.
The moles of hydrogen produced in the reaction has been 0.105 mol. Hence, option D is correct.
The balanced chemical equation for the decomposition of Ammonia has been:
[tex]\rm 2\;NH_3\;\rightarrow\;N_2\;+\;3\;H_2[/tex]
Computation for moles of Hydrogen producedFrom the balanced chemical equation, decomposition of 2 moles of ammonia produces, 3 moles of hydrogen and 1 mole, nitrogen.
The moles of hydrogen produced along with 0.0351 mol nitrogen has been:
[tex]\rm 1\;mol\;N_2=3\;mol\;H_2\\ 0.0351\;mol\;N_2=0.0351\;\times\;3\;mol\;H_2\\ 0.0351\;mol\;N_2=0.105\;mol\;H_2[/tex]
Thus, the moles of hydrogen produced in the reaction has been 0.105 mol. Hence, option D is correct.
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Is hardness an intensive or extensive physical property?.
HELP PLSSS!!!
How many particles are present in 166.3g of Ba(BrO3)2 ? (Round your answer to the hundredths place)
Show work
[tex]=166.3g\ Ba(BrO_{3})_{2}\ x\ \frac{1\ mol\ Ba(BrO_{3})_{2}}{393.13g\ Ba(BrO_{3})_{2}}\ x\ \frac{6.022\ x\ 10^{23}\ particles}{1\ mol\ Ba(BrO_{3})_{2}}[/tex]
[tex]=2.547398062\ x\ 10^{23}\ particles[/tex]
[tex]=2.55\ x\ 10^{23}\ particles[/tex]
You are given the mass of barium bromate. You have to find the moles of this substance using the molar mass and then multiply it by avogadro's number to find how many particles are present.
A sample of water has a mass of 100. 0 g. Calculate the amount of heat required to change the sample from ice at -45. 0°C to liquid water at 75. 0°C. Use the chart to complete the multiple steps required to arive at the final answer. Type in your answers below using 3 digits. Q1 = kJ q2 = kJ q3 = kJ qtot = kJ.
The heat required to convert -45 degrees Celsius ice to 0 degree Celsius ice has been 0.9450 kJ.
Heat required to convert 0 degree Celsius ice to 0 degree Celsius water has been 0 kJ.
The heat required to convert 0 degrees Celsius water to 75 degree Celsius water has been 31.5 kJ.
The sample of water at -45 degree Celsius has been converted to 75 degree Celsius in the following steps:
-45 degrees Celsius ice to 0 degree Celsius ice0 degree Celsius ice to 0 degree Celsius water0 degree Celsius water to 75 degree Celsius waterThe heat required for the conversion has been given as:
[tex]\rm Heat=mass\;\times\;specific heat\;\times\;change\;in\;temperature[/tex]
Computation for the heat requiredThe mass of sample has been 0.1 kg.
Heat required to convert -45 degrees Celsius ice to 0 degree Celsius ice has been:It has been known that the Specific heat of ice has been [tex]\rm 2100\;JKg^-^1K^-^1[/tex]
Substituting the values:
[tex]\rm Heat=0.1\;\times\;2100\;\times\;(273.15-228.15)\\Heat=0.1\;\times\;2100\;\times\;45\\Heat=9,450\;J[/tex]
The heat required to convert -45 degrees Celsius ice to 0 degree Celsius ice has been 0.9450 kJ.
Heat required to convert 0 degree Celsius ice to 0 degree Celsius water has been 0 as there has been no change in temperature.Heat required to convert 0 degree Celsius water to 75 degree Celsius water has been:It has been known that the Specific heat of water has been [tex]\rm 4200\;JKg^-^1K^-^1[/tex].
Substituting the values:
[tex]\rm Heat=0.1\;\times\;4200\;\times\;(348.15-273.15)\\Heat=0.1\;\times\;4200\;\times\;75\\Heat=31,500\;J[/tex]
The heat required to convert 0 degrees Celsius water to 75 degree Celsius water has been 31.5 kJ.
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Answer:
q1 9.42
q2 226
q3 31.4
tot 267
Explanation:
Science!
Pure water and pure salt are poor conductors of electricity. When salt is dissolved in water, the resulting solution conducts electricity well. Which statement explains why this occurs with these substances?(1 point)
The process of dissolving frees the electrons in the solution to move.
The process of dissolving frees the atoms in the solution to move.
The process of dissolving closely binds the ions in the solution.
The process of dissolving more closely binds the electrons in the solution.
Answer:
facta you from the same thing as you from the samel
Answer:
The first one
The process of dissolving frees the electrons in the solution to move.
Explanation:
Which atom is most likely involved in the coordination of calcium ions found in hrp?.
Answer:
oxygen
Explanation:
hope this helps
Both plant and animal cells contain:
structural, plant and animal cells are very similar because they are both eukaryotic cells. they both contain membrane-bound organelle such as the nucleus, endoplasmic, mitochondria etc
if there are 12 x 1023 oxygens in a sample of water, how many grams of hydrogen are in the sample?
I’m sorry that I couldn’t write it, brainly kept saying that I have inappropriate words for some reason.
list and explain 2 positive and 2 negative effects of mining in Guyana
Answer:
While positive impacts such as employment and community development projects are important, they do not off-set the potential negatives. We have found mining can negatively affect people by: forcing them from their homes and land. preventing them from accessing clean land and water.
