Answer:
B. The correct ratio is 3:1:1:3
Explanation:
According to this question, the following chemical equation was given:
CH3COOH + Al(OH)3 → Al(CH3COO)3 + H2O
This equation is obviously not balanced because the number of atoms of each element on both sides of the equation is not equal or the same. To balance the equation, we make use of coefficients as follows:
3CH3COOH + Al(OH)3 → Al(CH3COO)3 + 3H2O
- There are now 6 moles of C on each side
- There are now 15 moles of H on each side
- There are now 9 moles of O on each side
- There is now 1 mole of Al on each side
The correct ratio of each compound is in the order 3:1:1:3
Which of the following is true for the equilibrium constant of a reaction?
It is a ratio of the concentrations in a reaction.
It remains the same at different temperatures.
It is represented by the symbol H.
Its value is always close to 1.
Answer:
The correct answer is It is a ratio of the concentrations in a reaction.
Explanation:
⇒ It is a ratio of the concentrations in a reaction.
This sentence is true because the equilibrium constant is calculated from the product of the concentration of the reaction products divided into the product of the concentrations of the reactants, each concentration raised by the stoichiometric coefficient. For example, for the following reaction:
aA + bB → cC + dD
The equilibrium constant is expressed as:
[tex]K = \frac{[C]^{c}[D]^{d} }{[A]^{a} [B]^{b} }[/tex]
⇒ It remains the same at different temperatures.
The sentence is false because the equilibrium constant changes with the temperature. In general, an endothermic reaction is favored by the increment of temperature (the equilibrium shifts to the right side) and disfavored with the decrease in temperature (shifts to the left).
⇒ It is represented by the symbol H.
This sentence is false because the equilibrium constant is represented with the letter K.
⇒ Its value is always close to 1.
It is not true because the equilibrium constant can be a number below or above 1.
K < 1 ⇒ there is more concentration of reactants at equilibrium
K > 1 ⇒ there is more concentration of products at equilibrium
A hot metal plate at 150°C has been placed in air at room temperature. Which event would most likely take place over the next few minutes?
Molecules in both the metal and the surrounding air will start moving at lower speeds.
Molecules in both the metal and the surrounding air will start moving at higher speeds.
The air molecules that are surrounding the metal will slow down, and the molecules in the metal will speed up.
The air molecules that are surrounding the metal will speed up, and the molecules in the metal will slow down.
Answer:
d. The air molecules that are surrounding the metal will speed up, and the molecules in the metal will slow down.
Explanation:
hopes this helps
sorry if it doesn't
:)
Isotopes (such as hydrogen-1, hydrogen-2, and hydrogen-3) are the atoms of
the same element that differ in:
Answer:
The number of neutrons in nucleus
The intermediate product formed during the production of urea is,
Answer:
Arginine is intermediate product formed during the production of urea
The key combination is ornithine, on which the urea molecule is 'created'; intermediates in the procedure contain citrulline and arginine.
What is the Production of Urea?
The urea cycle is a procedure of conversion of toxic ammonia to negligibly toxic urea. Consequences of the urea cycle are 1 molecule of urea, 2 molecules of ADP, and 1 molecule of both AMP and fumaric acid.
When Ammonia and carbon dioxide recovery During urea decomposition a mixture of gaseous carbon dioxide and also ammonia is accumulated and also immersed into a dilute aqueous urea resolution.
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Two solids of identical mass, A and B, are analyzed using identical calorimeters. Each calorimeter contains the same amount of water and is at room temperature. When the solids are heated to the same initial temperature and placed in their calorimeters, the final temperature of solid A's calorimeter is higher than that of B. What can we infer from this
Answer:
Specific heat of solid A is greater than specific heat of solid B.
Explanation:
In the calorimeter, as the temperature is increasing, the vibrational kinetic energy will increase and this means that additional amount of energy will be needed to increase the temperature by the same value. Therefore, we can conclude that specific heat increases as temperature increases.
Now, we are told that the final temperature of solid A's calorimeter is higher than that of B.
This means from our definition earlier, Solid A will have a higher specific heat that solid B.
A mass of 2.20 kg of sodium phosphate is converted number of moles
Explanation:
here's the answer to your question
13.41 moles are present in 2.20 kg of sodium phosphate.
What are moles?A mole is defined as 6.02214076 × [tex]10^{23}[/tex]of some chemical unit, be it atoms, molecules, ions, or others. The mole is a convenient unit to use because of the great number of atoms, molecules, or others in any substance.
The molar mass of sodium phosphate is 163.94 g/mol.
2.20 kg = 2200g
[tex]Moles = \frac{2200g}{163.94 g/mol.}[/tex]
Moles = 13.41954374 = 13.41 moles
Hence, 13.41 moles are present in 2.20 kg of sodium phosphate.
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How many moles of tungsten are in 415 grams of tungsten?
Answer:2.26
Explanation:
hi can anyone help me with a gas law device
Explanation:
The Gas Law Apparatus is a high-quality demonstrator of the relationship between pressure, volume and temperature of a gas. The pressure gauge shows how pressure affects volume and vice versa. A digital thermometer displays the temperature.
How many atoms are in 9.35 moles of lithium?
Answer:
Answer: 9.35 moles Li contains 2.08 × 10 (to the power of)24 atoms .
Explanation:
a water tank is filled with water up to 3.5 m height caluclate the pressure given by the tanks at its bottom
Answer:
eşnatto
Luch bresder sksksjskdnsldkspdm
What is the name if this compound? C6H5-C-H=O
Answer:
Benzaldehyde (C6H5CHO) is an organic compound consisting of a benzene ring with a formyl substituent. It is the simplest aromatic aldehyde and one of the most industrially useful.
Pat wants to measure the length of a table. She'll use a measuring tape. Which units should Pat use to express the length?
A.
pints
B.
degrees
C.
inches
D.
moles
Answer:
the answer is c)inches
Explanation:
inches is best for showing length
PLZ HELP ME WITH MY WORK
Which of the following processes does NOT facilitate containment?
Answer:
b is the answr
Explanation:
The correct answer is Option (B) Enrichment of Uranium-235 is done.
What is Containment? Containment is the process of preventing pollution or contamination of the immediate site environment by dust, chemicals, and other materials to prevent corrosion.What is Corrosion?Corrosion is a natural process that converts a refined metal into a more chemically stable oxide.The degree of containment is directly proportional to the degree of toxicity present in the corrosion preventive substance being applied.Why other options are incorrect?Option (A) , (C) , (D) are the options that facilitate containment because these are the processes for preventing contamination.
Hence Option (B) is correct because enrichment of uranium-235 is achieved by the process of conversion So , It does not facilitate containment
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Question 5 of 10
What are the substances you start with in a chemical reaction called?
A. The products
B. The mixture
C. The reactants
D. The intermediates
Answer:
c. the reactants
Explanation:
the reactants are specifically the substances consumed in the course of chemical reaction
It's said that not all electrons in an atom have the same amount of energy. Is it the same for protons? Because if it's not then how come they have the same atomic number at the end?
Answer:
When an atom has an equal number of electrons and protons, it has an equal number of negative electric charges (the electrons) and positive electric charges (the protons). The total electric charge of the atom is therefore zero and the atom is said to be neutral.
I HOPE THIS HELPS !!!!!!!!!!!
What word is used to refer to a group of organ systems working together?
1. organism
2. cell
3.tissue
4.organ
Answer:
1
Explanation:
in my opinion,The answer would be organism
please mark me as brainliest
how many grams are in 1.50 moles of KMnO4
Answer:
The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles KMnO4, or 158.033949 grams.
Explanation:
I belive that is correct,hope it helps:)
What tricks to use to differentiate between Ionic and Covalent bonds
Answer: first of all an ionic bonds is the electrostatic force of attraction between opposite ions and and covalent bonds is the bond between different elements mostly non metals or the sharing of electrons between elements which are mostly non metals.
Explanation: metals and non metals react to form ionic compounds
and non metals react to form covalent bonds
HOW TO DIFFERENTIATE
ionic solids the particles are charged and the forces between them are strong
covalent solids the particles are not charged and the forces between them are weak
now i would differentiate using their properties
ionic bonds / compounds
have high melting point
have low melting point
They are soluble in water
and they conduct electricity even when melted or dissolved in water
covalent bonds /compounds
they have low melting point
they have low melting point
They are insoluble
they do not conduct electricity
HOPE THIS HELPS!!!
Can someone help with this please
Answer:
see explanations
Explanation:
4NH₃(g) + 5O₂(g) => 4NO(g) + 6H₂O(g)
Ci(NH₃) = 3.5mole/4L = 0.875M
Cf(NH₃) = 1.6mole/4L = 0.400M
Rate-1 => Δ[NH₃]/Δt = |(0.400M - 0.875M)/3min| = 0.158M/s
Rate-2 => 6(Δ[NH₃]/Δt) = 4(Δ[H₂O]/Δt) => 6/4(0.158M/s) = 0.237M/s
Rate-3 => 5(Δ[NH₃]/Δt) = 4(Δ[O₂]/Δt) => 5/4(0.158M/s) = 0.237M/s
_________________________________________________________
NOTE: When setting up comparative rate expressions for a given reaction, set the rates expressions as equal then swap coefficient values. Then solve for rate of interest and substitute givens.
example: for NH₃ and H₂O
set rates expressions equal => Δ[NH₃]/Δt = Δ[H₂O]/Δt then swap and insert coefficients from given rxn ...solve for rate of interest ...4NH₃(g) + 5O₂(g) => 4NO(g) + 6H₂O(g)
=> 6(Δ[NH₃]/Δt) = 4(Δ[H₂O]/Δt)
=> Δ[H₂O]/Δt = 6/4(Δ[NH₃]/Δt) = 6/4(0.237M/s) = 0.237M/s
What's the velocity of a ball falling with 100 joules of kinetic energy and a mass of 2 kilograms?
А. 3 m/s
B. 5 m/s
C. 7 m/s
D. 8 m/s
E. 10 m/s
Answer:
E
Explanation:
kinetic energy of linear motion
[tex]k.e = \frac{1}{2} m {v}^{2} [/tex]
kinetic energy, K.e= 100joules
mass, m = 2kg
velocity, v =?
substituting the values into the formula :
[tex]100joules = \frac{1}{2} \times 2kg \times {v}^{2} [/tex]
[tex] {v }^{2} = 100[/tex]
[tex]v = \sqrt{100 } [/tex]
[tex]v = 10m { \sec }^{ - 1} [/tex]
For the reaction 2A + 4B ----> 2C + 2D, at a particular instant in time, the rate of the reaction is 0.0352 M/s. What is the rate of change of B? Show Work!
A. 0.0088 M/s
B. -0.0088 M/s
C. -0.141 M/s
D. -0.0352 M/s
E. 0.141 M/s
Explanation:
The given chemical equation is:
[tex]2A + 4B -> 2C + 2D[/tex]
The rate of the reaction is 0.0352 M/s.
During the course of the reaction, the rate of reactants decreases, and the rate of products increases.
The rate of disappearance of B is shown below:
[tex]rate=-\frac{1}{4} \frac{d[B]}{dt}[/tex]
So, rate of change of B is :
[tex]rate of change of B =- rate * 4\\=-0.0352 M/s * 4\\=-0.1408M/s\\\\=-0.141M/s[/tex]
Option C.
In the given reaction, rate of change of reactant B is equal to -0.141 M/s.
What is the rate of reaction?Rate of any chemical reaction defines the speed of the completion of that reaction.
In the question given reaction is:
2A + 4B ----> 2C + 2D
Rate of reaction = 0.0352 M/s.
Rate of the reaction with respect to the reactant B is written as:
Rate = [tex]${\rm{ - }}\frac{{\rm{1}}}{{\rm{4}}}\frac{{\left[ {{\rm{dB}}} \right]}}{{{\rm{dT}}}}$[/tex], where negative sign shows the disappearance of reactant B.
Rate of change of B i.e. [tex]$\frac{{{\rm{dB}}}}{{{\rm{dT}}}}$[/tex] = 4 × (-rate)
[tex]$\frac{{{\rm{dB}}}}{{{\rm{dT}}}}$[/tex] = 4 × (-0.0352) = -0.1408 = -0.141 M/s
Hence, -0.141 M/s is the rate of change of B.
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A process which is unfavorable with respect to enthalpy, but favorable with respect to entropy Group of answer choices could occur at high temperatures, but not at lower temperatures. could not occur regardless of temperature. could occur at any temperature. could occur at low temperatures, but not at higher temperatures. none of the above
Answer:
could occur at any temperature.
Explanation:
The spontaneity of a reaction is what determines whether the reaction will occur or not. A spontaneous reaction occurs easily.
The spontaneity of a reaction is predicted by the sign of ∆G.
When ∆G is positive, the reaction is not spontaneous. When ∆G is negative, the reaction is spontaneous.
Note that;
∆G= ∆H - T∆S
Where;
∆H = Change in enthalpy
∆S = Change in entropy
T= temperature
If ∆H is unfavourable and ∆S is favourable, the reaction can proceed at all temperatures because ∆G will always be negative.
It should be noted that a process that is unfavorable as regards to enthalpy, but favorable with respect to entropy could occur at any temperature.
Enthalpy(∆H) serves as amount of internal energy that a compound has, entropy( ∆S) on the other hand serves as intrinsic disorder within the system.
However, spontaneity of a reaction determines likely hood of occurrence of a reaction, when the process is spontaneous, it makes the reaction to occurs easily.
We can conclude that whenever enthalpy is unfavourable and entropy of a system is favourable, then the spontaneity will be negative and the reaction will occur at any temperature.
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40 POINTS! Will Mark Brainliest if correct answer and all work is shown!
In this reaction: Mg (s) + I₂ (s) → MgI₂ (s)
If 2.08 moles of Mg react with 3.56 moles of I₂, and 1.76 moles of MgI₂ form, what is the percent yield?
Explanation:
here's the answer to your question
Answer:
I'm not really sure. Sorry dude.
Explanation:
Sorry.
Which type of molecule is shown below?
0
doch
H-CO-CH3
O A. Alcohol
O B. Ester
O C. Aldehyde
i
D. Ketone
Answer:
B. Ester
Explanation:
"Esters have the general formula RCOOR′, where R may be a hydrogen atom, an alkyl group, or an aryl group, and R′ may be an alkyl group or an aryl group but not a hydrogen atom."
The type of molecule is ester.
What is molecule?A molecule is a collection of more than one atom bound together by chemical bonds; based on the circumstances, the phrase will not include ions that meet this requirement.
What is ester?Esters were chemical molecules formed by mixing an oxoacid and a hydroxyl substance like alcohol as well as phenol.
It can be seen that molecule have -COO group which represent ester group. Hence, given molecule have ester group.
Therefore, the correct answer will be option (B).
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Use the de Broglie's Wave Equation to find the wavelength of a 400 g ball moving at 120 m/s. Please show your work. Note: h = Planck's constant (6.62607 × 10-34 J*s)
de Broglie's wave equation describes that particles have wave properties. The equation is
λ = h/mv
Where λ is the wave length of the particle (m), h is the Planck's constant (6.62607 x 10⁻³⁴J s), m is the mass of a particle (kg) and v is the velocity (m/s).
λ = ?
h = 6.62607 x 10⁻³⁴ J s
m =200 g = 0.2 kg
v = 20 m/s
By substitution,
λ = 6.62607 x 10⁻³⁴ J s / (0.2 kg x 20 m/s)
λ = 1.66 x 10⁻³⁴ m
Hence, the wavelength of the 200 g ball 1.66 x 10⁻³⁴ m.
such as water or oxygen,
All of the matter in a what
is the same?
Answer:
A water molecule consists of two atoms of hydrogen linked by covalent bonds to the same atom of oxygen. Atoms of oxygen are electronegative and attract the shared electrons in their covalent bonds.
use the the dot strict on the right to and the periodic table to determine the element represented.
sodium (Na)
potassium (K)
neon (Ne)
argon (Ar)
Answer:
Pottasium
Explanation:
because it is the nineteenth element
Answer:
The answer is B. Potassium.
Explanation: Potassium has 19 electrons that are organized like the image if you count the electrons on each obital. This answer is correct on edge 2020. Hope this helps!
A metal is treated with dilute hydrochloric
acid in a test tube. A burning match stick is brought
near the mouth of the test tube, but no sound is
heard.
Explanation:
There are certain metals that are less reactive compared to standard hydrogen electrode.
So, such metals do not release hydrogen gas in a reaction with dilute acids.
Examples of such metals are:
copper,silver,gold,platinum,mercury.
Answer:
A burning match stick is brought
near the mouth of the test tube, but no sound is
heard. That means hydrogen gas is not released in this reaction and the metal may be a less reactive metal and it is one among the above list of metals.
A liquid that occupies a volume of 8.2L has a mass of 5.6kg. What is the density of the liquid in kg/L
Answer:
0.68
Explanation:
This is because the formula for finding density is mass/volume. Therefore the equation becomes 5.6/8.2 giving you 0.68
