Answer:
89.4%
Explanation:
We'll begin by obtaining the actual yield of CO2. This can be obtained calculating the number of mole of CO2 produced from the reaction as follow:
Volume (V) = 1.44 L
Temperature (T) = 293 K
Pressure (P) = 0.984 atm
Gas constant (R) = 0.0821 atm.L/Kmol
Number of mole (n) =..?
PV = nRT
0.984 x 1.44 = n x 0.0821 x 293
Divide both side by 0.0821 x 293
n = (0.984 x 1.44) / (0.0821 x 293)
n = 0.059 mole
Therefore, the actual yield of CO2 is 0.059 mole.
Next we shall the theoretical yield of CO2. This can be obtained as follow:
First, we shall determine the number of mole in 5.97 g of glucose, C6H12O6.
Molar mass of C6H12O6 = (12x6) + (12x1) + (16x6) = 180 g/mol
Mass of C6H12O6 = 5.97 g
Mole of C6H12O6 =?
Mole = mass /molar mass
Mole of C6H12O6 = 5.97/180
Mole of C6H12O6 = 0.033 mole
Now, we can calculate the theoretical yield of CO2 as follow:
C6H12O6(s) → 2C2H5OH(l) + 2CO2(g)
From the balanced equation above,
1 mole of C6H12O6 produced 2 moles of CO2.
Therefore, 0.033 mole of C6H12O6 will produce = 0.033 x 2 = 0.066 mole of CO2.
Therefore, the theoretical yield of CO2 is 0.066 mole.
Finally, we shall determine the percentage of CO2 as follow:
Actual yield = 0.059 mole
Theoretical yield = 0.066 mole.
Percentage yield =?
Percentage yield = Actual yield /Theoretical yield x 100
Percentage yield = 0.059/0.066 x 100
Percentage yield = 89.4%
Therefore, the percentage yield of the reaction is 89.4%
how many atoms are in 2.10 g of K? molar mass of K=39.10g/mole.
Answer:
The answer is option BExplanation:
To calculate the number of atoms we must first calculate the number of moles
Molar mass = mass / number of moles
number of moles = mass / Molar mass
Molar mass (K) = 39.10mole
mass = 2.10g
number of moles = 2.10/ 39.10
= 0.0537mol
After that we use the formula
N = n × L
where n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10^23 entities
Number of K atoms is
N = 0.0537 × 6.02 × 10^13
N = 3.23×10^22 atoms of KHope this helps you.
In the reaction below green chlorine gas and brown iodine chloride forms yellow iodine trichloride Cl2 (g) + ICl (l) ⇌ ICl3 (s) If more iodine trichloride is added to the reaction, how will it affect the color of the mixture? A. It will become more brown and yellow B. It will become more green and brown C. It will become more yellow and green. D. It will not change.
Answer:
B. It will become more green and brown
Explanation:
Le Chateliers principle states that when a constraint such as change in concentration, volume, pressure or temperature is imposed on a reaction system at the equilibrium, the equilibrium position will shift in such a way as to annul the constraint. Let us see how this applies to the equation under consideration.
If the system is at equilibrium and more ICl3 is added to the system, the equilibrium will shift towards the left hand side (more reactants are formed). This implies that the colour of the system will become more green and brown since there are more reactants now in the system.
Which ion with a charge of -2 has an electron configuration of 1s22s22p6 ?
Use the periodic table.
A. N3-
B. O2-
C. O
D. N
Answer:
The answer is option B.
O2-Hope this helps you
Answer: O2
Explanation:
in what type of molecule are london dispersion forces most important?
Answer:
Read below
Explanation:
The effects of London dispersion forces are most obvious in systems that are very non-polar (e.g., that lack ionic bonds), such as hydrocarbons and highly symmetric molecules such as bromine (Br2, a liquid at room temperature), iodine (I2, a solid at room temperature).
A sample of gas at a fixed pressure has a temperature of 300 K and a volume of 3 L. Calculate the volume if the gas is heated to 700 K.
Answer:300k=3L
700k=x
cross multiply
300x=2100; x=7L
Explanation:
Answer:
7L
Explanation:
Calculate mass of 2 molecules of H2O(water) ?
Answer:
36
Explanation:
H - 1
O - 16
H2O = 2(1) + 16 = 18
2(H2O) = 36
little help plz? Determine which of the following is the correct equilibrium expression for the chemical reaction: Answer choices are below.
Answer:
Kc = [CaO] [O2] / [CaCO3]
Explanation:
Equilibrium constant, Kc is simply defined as the ratio of the concentration of products raised to their coefficient to the concentration of the reactants raised to their coefficient.
Thus, we can write the equation for the equilibrium constant, Kc for the reaction given in the question above as follow:
CaCO3(s) <==> CaO(s) + O2(g)
Kc = [CaO] [O2] / [CaCO3]
A bungee cord with a spring constant of 800 StartFraction N over m EndFraction stretches 6 meters at its greatest displacement. How much elastic potential energy does the bungee cord have? The bungee cord has J of elastic potential energy.
Answer:
P.E = 14,400J or 14.4kJ
Explanation:
Hello,
This question requires us to calculate the elastic potential energy of a cord. To do this, we should get our data first from the question and then proceed on how to approach the question.
Data;
Spring constant (k) = 800Nm²
Displacement (x) = 6m
Elastic potential energy (P.E) = ½kx²
P.E = ½kx²
k = force or spring constant
x = displacement
P.E = ½ × 800 × 6²
P.E = ½ × 28800
P.E = 14,400J
P.E = 14.4kJ
The potential energy is 14,400J or 14.4kJ
Therefore, the bungee cord has a potential energy of 14.4kJ
Answer:
14,400J
Explanation:
Calculate the molar mass of aluminum oxide (Al2O3). Express your answer to four significant figures.
The molar mass of Al2O3 is
Answer:
102.0 g/mol.
Explanation:
Aluminum oxide or Al2O3 is a chemical compound composed of 3 Oxygen and 2 aluminum atoms. Naturally, it is present in the form of mineral corundum in crystalline polymorphic forms. It holds significant importance in the preparation of Aluminium metal that is used as a refractory material.
To calculate the molar mass of Aluminum oxide, we will add the molar mass of 2 Al and 3 O atoms.
Since molar mass of Al is: 26.98 g
Molar mass of O is: 16.00 g
Molar mass of Al2O3
= (26.98)2 + (16.00) 3
= 53.96 + 48
= 101.96 g/mol
Since it is mentioned in question to round off the answer upto 4 significant figures, it will make the answer: 102.0 g/mol.
I hope it helps!
Answer:
102 grams/mol
Explanation:
This is correct! :)
The proton,neutron and electrons in the atom of the element represented by the symbol 231Y89 are:
A. 89,231 and 89
B. 142, 89 and 142
C. 89, 142 and 89
D. 89, 320 and 320
Answer:
Protons = 89
Neutrons = 142
Electrons = 89
Option C
Explanation:
Hello,
Were required to find the proton, neutron and electron of an element Y
The atomic mass of element Y is composed of the protons and neutrons while the atomic number is the exact amount of protons present in the element.
Element = ₈₉²³¹Y
Atomic number = 89
Number of protons = 89
Number of electrons = 89
Atomic mass = 231
Atomic mass = protons + neutrons
231 = 89 + neutrons
Neutrons = 231 - 89
Neutrons = 142
Therefore the number of protons is 89, number of neutrons is 142 and number of electrons is 89.
Note: for an electrically neutral atom, the number of protons must be equal to the number of electrons
Na + Cl2 ------> ?
what will be formed?
Answer:
2Na + Cl2 ------> 2NaCl
sodium + chlorine = sodium chloride (salt)
Answer:
Sodium chloride NaCl
Explanation:
NaCl will form.
2Na + Cl2 ----> 2NaCl
Each Na atom donates 1 electron from its outermost shell electron to each chlroine atom, so that Na can attain full outermost shell electrons (octet), where it is most stable. Na+ ion is formed after losing 1 electron.
Each chlroine atom gains 1 electron so that it can have 8 outermost shell electrons (stable). It becomes Cl- ion.
Combining Na+ and Cl-, NaCl is formed so that the net charge is 0. To balance the equation, since chlorine exists as diatomic molecule, 2 Na atom reacts with 1 chlorine molecule (2 chlorine atoms) to form 2 NaCl.
does anyone know how to do question nine if can you please show working out. thanks.
Answer:
A. 257600g (i.e 257.6 Kg) of CaO were produced.
B. 202400g (i.e 202.4 Kg) of CO2 were produced.
Explanation:
We'll begin by calculating the mass of CaCO3 present in 5×10² Kg of lime stone. This is illustrated below:
From the question given, the lime stone contains 92% of CaCO3.
Mass of CaCO3 = 92% x 5×10² Kg
Mass of CaCO3 = 92/100 x 5×10² Kg
Mass of CaCO3 = 460 Kg
Therefore, 460 kg of CaCO3 is present in the lime stone.
Next, we shall determine the mass of CaCO3 that was heated and the masses of CaO and CO2 produced from the balanced equation. This is illustrated below:
CaCO3(s) —> CaO(s) + CO2(g)
Molar mass of CaCO3 = 40 + 12 + (16x3) = 100g/mol
Mass of CaCO3 from the balanced equation = 1 x 100 = 100g
Molar mass of CaO = 40 + 16 = 56g
Mass of CaO from the balanced equation = 1 x 56 = 56g
Molar mass of CO2 = 12 + (2x16) = 44g/mol
Mass of CO2 from the balanced equation = 1 x 44 = 44g
Summary:
From the balanced equation above,
100g of CaCO3 were heated to produce 56g of CaO and 44g of CO2.
A. Determination of the mass of quick lime, CaO produced by heating 5×10² Kg of lime stone.
5×10² Kg of lime stone contains 460 Kg (i.e 460×10³ g) of CaCO3.
From the balanced equation above,
100g of CaCO3 were heated to produce 56g of CaO.
Therefore, 460×10³g of CaCO3 will be heated to produce = (460×10³ x 56)/100 = 257600g of CaO.
Therefore, 257600g (i.e 257.6 Kg) of CaO were produced.
B. Determination of mass of carbon dioxide, CO2 produced by heating 5×10² Kg of lime stone.
5×10² Kg of lime stone contains 460 Kg (i.e 460×10³ g) of CaCO3.
From the balanced equation above,
100g of CaCO3 were heated to produce 44g of CO2.
Therefore, Therefore, 460×10³g of CaCO3 will be heated to produce = (460×10³ x 44)/100 = 202400g of CO2.
Therefore, 202400g (i.e 202.4 Kg) of CO2 produced.
PLS HELPP!!Which accurately describes one impact of the atmosphere on Earth’s cycles?
Answer:
The correct option is;
Produces wind currents
Explanation:
The Earth's atmosphere which comprises the gases surrounding the Earth when heated up by the heating effect of the Sun creates winds such as land and sea breezes
The kind of forces that produce land and sea breezes results in wind patterns globally that affect climate. The curving masses of air due to the rotation of the Earth results in coriolis effect and trade winds that determines the cyclic (annual) seasons and weather.
Answer: A
Explanation:
Produces wind currents
Use enthalpies of formation to determine the ΔHreaction for the reaction
CaCl2(s)---> CaCl2(aq).
Answer:
The enthalpy is increased by the increased heat of the reaction.
Explanation:
In this reaction, as the transition from solid to liquid state, enthalpy increases, that is, the heat applied to change its state is greater and this increases, reaching a mayor disorder.
If the reaction increases its heat, and a liquid state passes, the enthalpy increases, therefore the disorder also and the entropy will also be increased.
The table lists some organelles and functions. Only one pair is correctly matched. Functions of Organelles Organelle Function Chloroplast Stores water and waste materials Cell wall Supports cell membrane, maintains cell shape, and protects cell Cell membrane Breaks down waste materials and debris Vacuole Produces proteins for the cell Which organelle in the table is correctly matched with its function? chloroplast cell wall cell membrane vacuole plz help soon
The organelle that is matched correctly is the Cell Wall
The cell wall functions as a protective organelle as well as gives shape to the cell.
Functions of the cell wallThe cell wall is an organelle found in prokaryotic cells and plant cells.
Cell walls generally function to protect the cell by delimiting its surroundings the membrane from damage.
They also act as permeable structures to substances as well as give the respective cells their characteristic shapes.
More on cell walls can be found here: https://brainly.com/question/965751
What is the volume at STP, in liters, occupied by 26.4 g of F2 gas?
Answer:
volume = 15.568dm³
Explanation:
n = mass/molar mass
n = 26.4/38
n = 0.675mole
0.695 = volume/22.4dm³
volume = 15.568dm³
Explain why gas do not diffuse at the same rate
Answer: at the same rate with what please?
Explanation:
how much energy is required to melt 2 kg of copper?
1. The atomic number of an element is 23 and its mass number is 56. a. How many protons and electrons does an atom of this element have? b. How many neutrons does this atom have?
Answer:
There are 23 protons and 23 electrons. We know this because atomic number denotes the number of protons and also electrons. There are 56 - 23 = 33 neutrons because atomic mass denotes the total number of protons and neutrons.
which statement describes suchitas final diagram
Answer:
Explanation:
The initial chemical energy is 50 J. The arrow for heat is the widest output arrow. The arrow for chemical energy is the shortest output arrow.
Write the structure of the following compound: 2-(2-Bromophenyl)butane
Answer:
that is the structure
Explanation:
that is the structure
The chemical structure of 2-(2-Bromophenyl)butane can be written as follows:
[tex]CH_3(CH_2)_3CH(PhBr)CH_3[/tex]
What are Chemical structures?The arrangement of atoms and chemical bonds of a molecule or compound is called its chemical structure. They provide a visual representation of a molecule's three-dimensional form, which is important for understanding its characteristics and behavior in chemical processes.
For example, the chemical structure of 2-(2-Bromophenyl)butane can be written as follows:
[tex]CH_3(CH_2)_3CH(PhBr)CH_3[/tex]
Where,
The letter "Ph" stands for phenyl group, a six-carbon ring with five members bonded to hydrogen atoms and one bromine atom.The bromine atom attached to the second carbon atom of the phenyl ring is denoted by the letter "Br".The second carbon atom of the phenyl ring is where the bromine atom attaches, as indicated by the number two in the name.The word "butane" means that the primary chain of the molecule is made up of four carbon atoms. The "2-" before the name of a substituent refers to the position of the substituent on the main chain (the second carbon atom).Therefore, the chemical structure of 2-(2-Bromophenyl)butane can be written as follows:
[tex]CH_3(CH_2)_3CH(PhBr)CH_3[/tex]
Learn more about Chemical structure, here:
https://brainly.com/question/14481803
#SPJ2
The contents of a Helium ballon are in which phase? A. Solid B. Plasma C. Liquid G. Gas
many cars are fitted with airbags which inflate in an accident. Airbags contain solid sodium azide, NaN₃, which decomposes rapidly to form sodium and nitrogen. The nitrogen formed fills the air bags. Can someone please solve part b and c. I'll mark brainliest to whoever gets it right!
A 0.4647-g sample of a compound known to contain only carbon, hydrogen, and oxygen was burned in oxygen to yield 0.01962 mol of CO2 and 0.01961 mol of H2O. The empirical formula of the compound was found to be C3H6O2
Answer:
The essence including its given problem is outlined in the following segment on the context..
Explanation:
The given values are:
Moles of CO₂,
x = 0.01962
Moles of water,
[tex]\frac{y}{2} =0.01961[/tex]
[tex]y=2\times 0.01961[/tex]
[tex]=0.03922[/tex]
Compound's mass,
= 0.4647 g
Let the compound's formula will be:
[tex]C_{x}H_{y}O_{z}[/tex]
Combustion's general equation will be:
⇒ [tex]C_{x}H_{y}O_{z}+x+(\frac{y}{4}-\frac{z}{2}) O_{2}=xCO_{2}+\frac{y}{2H_{2}O}[/tex]
On putting the estimated values, we get
⇒ [tex]12\times x=1\times y+16\times z=0.4647[/tex]
⇒ [tex]12\times 0.01962+1\times 0.03922+16\times z=0.4647[/tex]
⇒ [tex]0.27466+16z=0.4647[/tex]
⇒ [tex]z=0.01187[/tex]
Now,
x : y : z = [tex]0.01962:0.03922:0.01187[/tex]
= [tex]\frac{0.01962}{0.0118}:\frac{0.03922}{0.0188}:\frac{0.0188}{0.0188}[/tex]
= [tex]1.6:3.3:1.0[/tex]
= [tex]3:6:2[/tex]
So that the empirical formula seems to be "C₃H₆O₂".
What is the mass of 1.84 mol NaCl? Give your answer to the correct number of significant figures. (Molar mass of NaCl = 58.44 g/mol) 1.84 mol NaCl = g NaCl
Answer:
108
Explanation:
Correct on edg2020
Answer:
108
Explanation:
1.84 mol NaCl times 58.44 g NaCl all over 1 mol NaCl= 108g NaCl.
The Mol NaCl from the 108 cancles the mol NaCl from the one, leaving the 58.44 g mol NaCl.
1.84 times 58.44 g NaCl= 107.5=108
An ion of the element oxygen (O) has an overall charge of 2−. Therefore, the number of electrons in this oxygen ion is An ion of the element oxygen (O) has an overall charge of 2−. Therefore, the number of electrons in this oxygen ion is ______
Answer:
The answer is 10
Explanation:
How is protenin in milk broken down in our digestive system
Answer:
when we drink the milk the digestive system produce protease enzyme to break down the protein of milk.
Which statement is true regarding carbonic acid (H 2CO 3)? If body fluids are too alkaline, carbonic acid is excreted through the respiratory system in the form of carbon dioxide and water. If body fluids are too alkaline, carbonic acid is retained through the respiratory system in the form of carbon dioxide and water. If body fluids are too acidic, carbonic acid is retained through the respiratory system in the form of carbon dioxide and water. If body fluids are too acidic, carbonic acid is excreted through the respiratory system in the form of carbon dioxide and water.
Answer:
the correct option is : If body fluids are too acidic, carbonic acid is excreted through the respiratory system in the form of carbon dioxide and water.
Explanation:
Metabolic acidosis is compensated by two systems, the renal and respiratory systems.
In the case of the respiratory system, the mechanism it uses to compensate for this phenomenon is to release the carbonic acid molecule dissociated into its components, that is, in the form of water and carbon dioxide.
The greater the acidosis, the more hyperventilation the person will have, and this is because they seek to eliminate carbonic acid more efficiently and quickly, along with renal excision.
The metabolic acidosis generated by carbonic acid is lethal, since the proteins in our body are denatured and the homeostasis of all systems is corrupted.
When Mendel crosses a plant with Greenpeace and a plant with yellow peas what color did the offspring have
Answer:
Yellow Peas
Explanation:
Answer:
yellow
Explanation:
Electrons are transferred from atoms of to atoms of . This transfer makes the sodium atoms and the phosphorus atoms . As a result, the sodium and phosphorus atoms strongly each other.
Answer:
Explanation:
Electrons are transferred from atoms of sodium to atoms of phosophorus. This transfer makes the sodium atoms positive and the phosphorus atoms negative. As a result, the sodium and phosphorus atoms strongly attract each other.
Answer:
the image is posted below :)
Explanation:
I hope this helps :))