Answer:
81.59%
Explanation:
4NH₃ + 5O₂ → 4NO + 6H₂OFirst we convert 107.50 g of NH₃ into moles, using its molar mass:
107.50 g NH₃ ÷ 17 g/mol = 6.32 mol NH₃Now we calculate how many moles of NO would have been formed by the complete reaction of 6.32 moles of NH₃:
6.32 mol NH₃ * [tex]\frac{4molNO}{4molNH_3}[/tex] = 6.32 mol NOThen we convert 6.32 moles of NO to grams, using its molar mass:
6.32 mol NO * 30 g/mol = 189.60 g NOFinally we calculate the percent yield:
154.70 g / 189.60 g * 100% = 81.59%I need help with this pls help
Answer: true
Explanation:
What if benzene sulphonyl chloride react with tertiary amine???? Name this reagent???
Explanation:
Hinsberg reagent is an alternative name for benzene sulfonyl chloride. This name is given for its use in the Hinsberg test for the detection and distinction of primary, secondary, and tertiary amines in a given sample. This reagent is an organosulfur compound.how many molecules of water in 61.0 grams of h2o
PLEASE!!!
Calculate the mass of 6.022×10236.022×1023 molecule of NH4cl
Answer:
53.5gram.
Explanation
Explanation: number of moles = number of molecule ÷ avogadro's number. => moles = 6.022 × 10²³ ÷ 6.022 × 10²³ = 1 mole. mass of 1 mole of NH4Cl = 1 × molar mass.
Determine the number of shared and unshared electrons in the structure. shared (bonding) electrons: unshared (lone, nonbonding) electrons: Determine the number of shared and unshared pairs of electrons in the structure. shared (bonding) pairs of electrons: unshared (lone, nonbonding) pairs of electro
Answer:
Shared (bonding) electrons : 8
Unshared (lone, non-bonding) electrons : 16
Explanation:
The Lewis dot stricture of the molecule attached to this answer shows us all the valence electrons present in the molecule.
Altogether, we have a total number of 24 valence electrons in SO3.
There are eight electrons shared between atoms of elements, these are the bonding electrons.
There are sixteen electrons that are not shared between atoms of elements, These are the lone or non-bonding electrons.
Hence, there are four shared pairs of electrons and eight pairs of unshared electrons.
A sample of a gas at 25°C has a volume of 150 mL when its pressure is 0.947 atm. What will the temperature of the gas be at a pressure of 0.987 atm and changes to 144mL?
*please help*
Answer:
25°C
Explanation:
Combined Gas Law (P₁V₁)/T₁ = (P₂V₂)/T₂
(0.947 atm)(150 mL)/25°C = (0.987 atm)(144mL)/T₂
5.682 = 142.128/T₂
T₂ = 142.128/5.682
T₂ = 25.0137272756°C = 25°C
For this question, you will need to submit a picture of your work in order to receive credit for the proper calculation.
How many tin atoms are found in 0.85 moles of tin?
Why Is the atomic theory a theory and not a law?
Answer:
Atomic theory is the scientific theory that matter is composed of particles called atoms. Atomic theory traces its origins to an ancient philosophical tradition known as atomism. ... An atom is now defined as the basic particle that composes a chemical element.
Explanation:
Hope i helped
during periods of strenuous activity muscle cells run low on
Answer: the answer is in the photo pls check and pls pls mark me as brainliest
Explanation:
During periods of strenuous activity muscle cells run low on oxygen.
What are muscle cells?Muscle cells are defined as the cellular components of muscle tissue. Muscle cells are designed to contract, or produce a pulling force, in order to stabilize or move different body parts. Skeletal, visceral, and heart muscle cells are the three different types. They are located in the organs' hollow walls. The muscular system is made up of a variety of muscle types, each of which is essential to how the body works.
Lactic acid is produced and accumulates in the muscle when there is a high energy demand, rapid changes in the energy requirement, and a lack of oxygen. During prolonged, intense activity, muscle pH falls to 6.4–6.6. Your muscles are forced to contract as forcefully as they can during this form of exercise, which results in an increase in the number of contractile filaments in your muscle cells.
Thus, during periods of strenuous activity muscle cells run low on oxygen.
To learn more about muscle cells, refer to the link below:
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i need help with this ASAP please i don’t understand this
Answer:
750 mmHg
Explanation:
From the question given above, the following data were obtained:
Partial pressure of CO₂ (Pₐ) = 250 mmHg
Partial pressure of N₂ (P₆) = 375 mmHg
Partial pressure of He (P꜀) = 125 mmHg
Pressure of the mixture (Pₜ) =?
The pressure of the mixture of the gases can be obtained as follow:
Pₜ = Pₐ + P₆ + P꜀
Pₜ = 250 + 375 + 125
Pₜ = 750 mmHg
Therefore, the pressure of the mixture of the gases is 750 mmHg
Sulfuric acid (H2SO4) and Ba(OH)2 solutions are strong electrolytes and give a bright glow on the light bulb of your conductivity apparatus. When Ba(OH)2 is added dropwise to H2SO4, a precipitate is formed and the light bulb of the conductivity apparatus dims and eventually fades completely.
Required:
a. Briefly explain this phenomenon.
b. Write the balanced equation of the reaction between these solutions.
Answer:
See Explanation
Explanation:
An electrolyte is a solution which is able to conduct electricity. An electrolyte conducts electricity because of the presence of ions which move around in the solution.
Ba(OH)2 and H2SO4 are composed of ions; these ions are the charge carriers in solution and are responsible for the conductivity of the solution and the glow of the bulb.
When Ba(OH)2 and H2SO4 are mixed, the following reaction occurs;
Ba(OH)2(aq) + H2SO4(aq) -------->BaSO4(s) + 2H2O(l)
The formation of the BaSO4(s) precipitate removes the ions that are responsible for the conductivity of the solution hence the light bulb of the conductivity apparatus dims and eventually fades completely.
LEEN was observing the physical properties of elements in order to classify them as either a metal, non-metal, metalloid or any other type of element. The first element was dull, brittle, and did not conduct heat. What would its classification be
Metal
Non-metal
Metalloid
Radioactive element
Answer:
Non-metal
Explanation:
A non-metal is a substance that possesses the following characteristics:
- It is brittle i.e can break easily
- It does not conduct heat and electricity
- It is not lustrous i.e does not shine when polished.
According to this question, LEEN was observing the physical properties of elements in order to classify them. He found that the first element was dull, brittle, and did not conduct heat. This makes it a NON-METAL.
HELP ME PLEASE!!!!! I NEED TO GET THIS RIGHT I CANT FAIL
The following reaction shows the products when sulfuric acid and aluminum hydroxide react.
2Al(OH)3 + 3H2SO4 → Al2(SO4)3 + 6H2O
The table shows the calculated amounts of reactants and products when the reaction was conducted in a laboratory.
Initial Mass and Yield:
Sulfuric Acid Aluminum Hydroxide
Initial Amount of Reactant 40 g 1.5 g
Theoretical Yield of Water from Reactant 14.69 g 10.38 g
What is the approximate amount of the leftover reactant? (4 points)
a.11.73 g of sulfuric acid
b.10.33 g of sulfuric acid
c.11.12 g of aluminum hydroxide
d.13.67 g of aluminum hydroxide
Answer:
c.11.43 g of aluminum hydroxide
Explanation:
For which compound is the empirical formula the same as the molecular formula?
Answer: Thus empirical and molecular formula is sa,e for [tex]C_4H_8O[/tex]
Explanation:
Molecular formula is the chemical formula which depicts the actual number of atoms of each element present in the compound.
Empirical formula is the simplest chemical formula which depicts the whole number of atoms of each element present in the compound.
1. The empirical formula is [tex]CO_2H[/tex]
The empirical weight of [tex]CO_2H[/tex] = 1(12)+2(16)+1(1)= 45g.
The molecular weight = 90 g/mole
Now we have to calculate the molecular formula:
[tex]n=\frac{\text{Molecular weight }{\text{Equivalent weight}=\frac{90}{45}=2[/tex]
The molecular formula will be=[tex]2\times CO_2H=C_2O_4H_2[/tex]
2. The empirical formula is [tex]CH_3O[/tex]
The empirical weight of [tex]CH_3O[/tex] = 1(12)+3(1)+1(16)= 31 g.
The molecular weight = 62 g/mole
Now we have to calculate the molecular formula:
[tex]n=\frac{\text{Molecular weight }{\text{Equivalent weight}=\frac{62}{31}=2[/tex]
The molecular formula will be=[tex]2\times CH_3O=C_2H_6O_2[/tex]
3. The empirical formula is [tex]C_2H_4O[/tex]
The empirical weight of [tex]C_2H_4O[/tex] = 2(12)+4(1)+1(16)= 44 g.
The molecular weight = 88 g/mole
Now we have to calculate the molecular formula:
[tex]n=\frac{\text{Molecular weight }{\text{Equivalent weight}=\frac{88}{44}=2[/tex]
The molecular formula will be=[tex]2\times C_2H_4O=C_4H_8O_2[/tex]
4. The empirical formula is [tex]C_4H_8O[/tex]
The empirical weight of [tex]C_4H_8O[/tex] = 4(12)+8(1)+1(16)= 72 g.
The molecular weight = 72 g/mole
Now we have to calculate the molecular formula:
[tex]n=\frac{\text{Molecular weight }{\text{Equivalent weight}=\frac{72}{72}=1[/tex]
The molecular formula will be=[tex]1\times C_4H_8O=C_4H_8O[/tex]
Poor water supplies rank as a —————- in causes of death.
A. not important
B. Minor
C. Major
D. Interesting
Question 6 Jackson visited the Grand Canyon with his family. He noticed that when he stood at the edge of the canyon and yelled is brother's name, he could hear his brother's name being repeated. Which of the following best explains why Jackson was able to hear an echo of his brother's name?
A)Sound travels as a wave that can be refracted and reflected by the particles of air around the edge of the canyon creating an echo.
B) Sound travels as a wave that can be absorbed by the walls of the canyon and passed back to Jackson's ear creating an echo.
C)Sound travels as a wave that can be refracted by the walls of the canyon creating an echo.
D)Sound travels as a wave that can be reflected by the walls of the canyon back into Jackson's earn as an echo.
Answer:
c
Explanation:
Hydrogen sulfide gas reacts with oxygen to produce sulfur dioxide gas and water according to the balance equation:
2H2S + 3O2 → 2SO2 + 2H2O.
How many moles of oxygen gas are required to react with 5.6 moles of hydrogen sulfide?
2 mol of H2S react with 3 mol of O2
5.6 mol of H2S react with =5.6×3/2=8.4 mol of O2
Most of the sulfur used in the United States is chemically synthesized from hydrogen sulfide gas recovered from natural gas wells. In the first step of this synthesis, called the Claus process, hydrogen sulfide gas is reacted with dioxygen gas to produce gaseous sulfur dioxide and water.
Suppose a chemical engineer studying a new catalyst for the Claus reaction finds that 994 liters per second of dioxygen are consumed when the reaction is run at 170.0 oC and the dioxygen is supplied at 0.77 atm. Calculate the rate at which sulfur dioxide is being produced.
Answer:
the rate at which sulfur dioxide is being produced is 0.8993 kg per second
Explanation:
Given the data in the question;
we write the balanced chemical reaction
2H₂S + 3O₂ → 2SO₂ + 2H₂O
now we calculate the number of moles of oxygen by using an ideal gas equation; PV = nRT
n = PV/RT
so we substitute in our values
n = ( 0.77 × 1.01325 × 10⁵ × 994 × 10⁻³ ) / ( 8.314 × (170 + 273 )
n = 77552.1285 / 3683.102
n = 21.056 mol
so, moles of SO₂ produced = 2/3 × 21.056 = 14.0373 moles
Hence, the production rate will be;
⇒ 14.0373 × 64.066
= 899.3 g/s
= 0.8993 kg/s
Therefore, the rate at which sulfur dioxide is being produced is 0.8993 kg per second
In what type of reaction is water always a product
when hydrogen and oxygen combine then they form water as product
also in neutralization reaction water form as product
hope it helps
Water is always a product in a type of chemical reaction called a neutralization reaction.
A reaction is a process that involves the transformation of one or more substances into one or more different substances.
Neutralization reaction is type of reaction occurs when an acid and a base react together to form a salt and water. The general equation for a neutralization reaction is:
[tex]\rm acid + base \rightarrow salt + water[/tex]
In this type of reaction, the hydrogen ions ([tex]\rm H^+[/tex]) from the acid combine with the hydroxide ions ([tex]\rm OH^-[/tex]) from the base to form water ([tex]\rm H_2O[/tex]). The remaining ions from the acid and the base combine to form a salt.
Therefore, water is always a product in a neutralization reaction, which occurs when an acid and a base react together to form a salt and water.
Learn more about reaction here:
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CAN SOMEONE HELP ME WITH THESE QUESTIONS I WILL GIVE ALL MY POINTS 5 STARS AND THANKS AND BRAINLY ALL I ASK IS WHENN YOU ANSWER THE QUESTIONS IS THAT YOU TELL ME IF IT HAS ANYTHING TO DO WITH REFLECTION REFRACTION OR ABSORPTION AND TELL ME WICH PROBLEM THE ANSWER GOES TO PLZZZZ THAT IS ALL I ASK THXS
When a substance is a solid it has
A. Potential energy
B. Kinetic energy
C. Gravitational energy
D. Chemical energy
Answer:
potential energy
Explanation:
what is melting point
Answer:
it's a temperature where a solid will melt
a 10 gram ball is rolling at 20 m/s. what energy does the ball have
Answer:
2 joule
Explanation:
10 gram= 0,01kg
The ball has kinetic enegry
K=1/2 *m *speed²
K=1/2 *0,01 * 400
K=2 Joule
Explain why you think it is important to know the three different types of rocks.
Answer:
because they contains clues about what the earth was like in the past. different rocks from under only certain conditions and even the dullest gray lump of rock.
A student prepared an Earth/Moon model in which the two spheres were 100 m apart. What were the diameters of the spheres?
Answer:
D₁ = 3.31 m
D₂ = 0.9 m
Explanation:
First, we will find the scaling factor of the model:
[tex]Scaling\ Factor = S.F = \frac{Distance\ between\ Earth\ and\ moon\ in\ Model}{Distance\ between\ Earth\ and\ moon\ in\ Actual}\\S.F = \frac{100\ m}{384400000\ m}\\[/tex]
S.F = 2.6 x 10⁻⁷
Now, the diameter of 1st sphere, that is Earth will be:
[tex]D_{1} = (S.F)(Actual\ Diameter\ of\ Earth)\\D_{1} = (2.6\ x 10^{-7}\ m)(12742000\ m)\\[/tex]
D₁ = 3.31 m
Now, the diameter of 2nd sphere, that is Moon will be:
[tex]D_{2} = (S.F)(Actual\ Diameter\ of\ Moon)\\D_{2} = (2.6\ x 10^{-7}\ m)(3474200\ m)\\[/tex]
D₂ = 0.9 m
Please help me, im studying for finals and i need an answer to this question! Will mark brainliest for the answers that are the best!
Answer:
group of people assembled for religious worship.
a second definition:
a gathering or collection of people, animals, or things.
other words that mean the same thing as cogeneration:
assembly gathering assemblage convocation crowd flock group mass multitude!
I just need one more brainlest so if this helped! <3
Please help asap. Brainliest to correct.
Which formula can be used to calculate the percent yield? (5 points)
Select one:
a. (Theoretical yield ÷ actual yield) x 100
b. (Actual yield ÷ theoretical yield) x 100
c. (Amount of reactants ÷ amount of products) x 100
d. (Amount of products ÷ amount of reactants) x 100
Answer:
I guess this answer is c
yh
Answer:
b. (Actual yield ÷ theoretical yield) x 100
Explanation:
The percent yield will be a ratio of collected or actual yield to the theoretical yield. Like any percentage, you are determining a part of a whole. You multiply by 100 to convert your decimal answer from the division into a percentage.
Consider the reaction that occurs between the acid CHOOH and the base CH3CH2NH2.
A) Draw the complete Lewis structures for the acid and the base.
B) Explain why OOH is more acidic than CH3CH2NH2.
C) Explain why CH3CH2NH2 is more basic than CHOOH.
D) Re-draw your Lewis structures from part a. Add to these structures to show why these two molecules are attracted to each other. Do not show a curved arrow mechanism here.
E) Using curved arrows, show the reaction mechanism for the reaction of CHOOH with CH3CH2NH2.
F. Using the Lewis definition of acid-base reactions, explain what is happening at the molecular level during this reaction.
Answer:
See explanation
Explanation:
The compound CHOOH is more acidic than CH3CH2NH2 because the carbonyl group is strongly electron withdrawing hence electron density is withdrawn from the O-H bond making easier for the proton to be lost.
CH3CH2NH2 is more basic than CHOOH because of the lone pair of electrons on the nitrogen atom of CH3CH2NH2. This is reinforced by the electron pushing effect of the CH3CH2-group thereby making the amine more basic(able to abstract a proton) than CHOOH .
The images attached show the structures of CHOOH and CH3CH2NH2 . They are able to react because of the proton in CHOOH and the lone pair of electrons in CH3CH2NH2 as shown in image III. This is a reaction in which the lone pair on CH3CH2NH2 abstracts a proton from CHOOH leading to the formation of the products as shown.
how many hydrogen bonds can Ethylene glycol form in water ? (or how many bonds can An oxygen atom form ?)
Answer:
wdyes giid gefwefgfw
Explanation:
egtetethe sanswers fe
Which combination will make a buffer?
A. NaOH and NaCl
B. KOH and KC1
C. HC1 and NaCl
D. CH3COOH and CH3COONa
Answer:
D
Explanation:
A buffer solution contains (1)a weak base and its salt, or (2) a weak acid and its salt.
So, the combination of the weak acid CH3COOH and its salt CH3COONa will make a buffer.
Answer:
D. CH3COOH and CH3COONa
Explanation:
A buffer is made of:
- a weak acid + its conjugate base
- a weak base + its conjugate acid
A. NaOH is a strong base
B. KOH is a strong base
C. HCl is a strong acid
