Answer:of
Explanation:
31. Solve this Gibbs' Free Energy Equation:
For a reaction at 200 K, the Delta H has a value of 250 kJ and the Delta S has a value of 0.100 kJ. 1s
the reaction spontaneous or not spontaneous?
Answer:The standard Gibbs energy change at 300K for the reaction 2A⇔B+C is 2494.
Explanation:
ΔG = free energy at any moment.
ΔGo = standard-state free energy.
R is the ideal gas constant = 8.314 J/mol-K.
T is the absolute temperature (Kelvin)
lnQ is natural logarithm of the reaction quotient
are acids fine chemicals
Yes, acids can be considered as fine chemicals.
Are acids considered fine chemicals?Yes, acids can be considered as fine chemicals. Fine chemicals are pure and complex chemical substances, produced in relatively small quantities with high purity and quality standards. Acids, such as sulfuric acid, hydrochloric acid, nitric acid, acetic acid and phosphoric acid are widely used in the chemical industry as intermediates or raw materials in the production of a wide range of fine chemicals.
Many acids are also used in various industrial processes, such as electroplating, etching, and metal cleaning. Therefore, acids play a crucial role in production of fine chemicals and are considered as essential class of chemicals in the chemical industry.
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Of the following, which constitutes the greatest percent of domestic use of water in the united states?.
Answer:
The answer is Flushing toilets.
Which metalloid is also a chalcogen?
Answer:
Oxygen or sulfur I believe since they fall in the same group.
Answer:
Oxygen is one of them.
What energy source is composed of hydrocarbon compounds.
Answer:
The answer is Crude oil, natural gas, and coal.
Explanation:
Hydrocarbon are highly combustible and produce carbon dioxide, water, and heat when they are burned.
-Hope this helps!
-Justin
which fields are significantly involved in food engineering?
Answer:
math and science
Explanation:
Math , science (biology, chemistry and physics) with advance courses in food chemistry, microbiology, food processing operation and engineering design.
An aerosol can contains gases under a pressure of4.5atmat16◦C. Ifthecanisleftona hot sandy beach, the pressure of the gases increases to 4.81 atm. What is the Celsius temperature on the beach?
Answer in units of ◦C.
The Celsius temperature on the beach is approximately 35.8 degrees Celsius.
The pressure-temperature relationship is governed by Charles' Law, which states that as long as pressure is constant, the volume of a gas will be directly proportional to its temperature.The equation used to determine the relationship between temperature and pressure is as follows: PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the universal gas constant, and T is the temperature in Kelvin (K).Let's utilize the formula given above to find the temperature of the beach:P1V1/T1 = P2V2/T2We can substitute the values we've been provided to solve for T2 : When the can is at 16 degrees Celsius and 4.5 atm, the pressure is:P1 = 4.5 atmT1 = 16°C + 273 = 289 KV1 and V2, which are the same, can be omitted. P2 = 4.81 atm Substituting these values in the equation : P1V1/T1 = P2V2/T2V1 and V2 are equal and can be eliminated. We can also change the temperature to Kelvin, so:T2 = (P2 * T1 * V1) / (P1 * V2)T2 = (4.81 atm * 289 K) / 4.5 atmT2 = 308.8 KSubtract 273 to convert back to Celsius : T2 = 308.8 K - 273 K = 35.8 degrees Celsius.
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Information to make scientifically supported judgments by describing the Importance of Ernest Rutherford's gold-foil experiment.
Answer:
Rutherford's experiment led to the rejection of JJ Thomson's raisin bundle model. In the experiment, a thin gold strip was bombarded with alpha particles. According to Thomson's atomic model, all alpha particles should have passed through the strip, but in this experiment it was found that some of the particles were reflected backwards. Based on his experiment, Rutherford published the result that almost the entire mass of an atom is concentrated in its nucleus. Rutherford's atomic model was later improved by Niels Bohr, who published the Bohr model.
In your opinion, what should be done by humans to protect Earth’s atmosphere?
Given that 1 amu = 1.6606 x 10-24 grams, find the mass of a mole of methane molecules.
The mass of a mole of methane molecules is approximately 2.66 x 10^(-23) grams.
To find the mass of a mole of methane (CH4) molecules, we need to calculate the molar mass of methane and then multiply it by Avogadro's number.
The molecular formula of methane (CH4) tells us that it consists of one carbon atom (C) and four hydrogen atoms (H). To calculate the molar mass, we add up the atomic masses of each element.
Carbon (C) has an atomic mass of approximately 12.01 amu, and hydrogen (H) has an atomic mass of approximately 1.01 amu.
Molar mass of methane (CH4) = (1 x Carbon atomic mass) + (4 x Hydrogen atomic mass)
= (1 x 12.01 amu) + (4 x 1.01 amu)
= 12.01 amu + 4.04 amu
= 16.05 amu
Now, to convert the molar mass from atomic mass units (amu) to grams, we use the given conversion factor:
1 amu = 1.6606 x 10^(-24) grams
Molar mass of methane in grams = 16.05 amu * (1.6606 x 10^(-24) grams/amu)
≈ 2.66 x 10^(-23) grams
Therefore, the mass of a mole of methane molecules is approximately 2.66 x 10^(-23) grams.
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As one mass increases, what happens to the gravitational force.
Answer:
Gravitational force is directly promotional to the mass
of both interacting objects.
Explanation:
More massive objects will attract each other with
a greater gravitional force. So as the mass of the
either objects increases the force of gravitational
attraction between them also increases.
A radioactive substance decays exponentially. A scientist begins with 170 milligrams of a radioactive substance. After 16 hours, 85 mg of the substance remains. How many milligrams will remain after 21 hours? mg Give your answer accurate to at least one decimal place
If 170 milligrams of a radioactive substance decays to 85 g after 16 hours. Then, after 21 hours, approximately 75.2 mg of the radioactive substance will remain.
The decay of the radioactive substance follows an exponential decay equation of the form:
\(N(t) = N_{o} \times e^{-kt}\)
Where:
N(t) is the amount of substance remaining at time t
N₀ is the initial amount of substance
k is the decay constant
t is the time elapsed
Given to us is N₀ = 170 mg and N(16) = 85 mg. We can use this information to find the decay constant, k.
\(85 = 170 \times e^{-k \times 16}\)
Dividing both sides by 170:
\(0.5 = e^{-k \times 16}\)
To solve for k, we can take the natural logarithm (ln) of both sides:
ln(0.5) = -k × 16
from this, the value of k comes out to be:
k = 0.0431
Now we can use the decay equation to find the amount of substance remaining after 21 hours, N(21):
\(N(21) = 170 \times e^{-0.0431 \times 21}\)
Calculating this expression:
N(21) = 75.2
Therefore, after 21 hours, approximately 75.2 mg of the radioactive substance will remain.
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what are buffers and why are they important
Explanation:
A buffer is a solution that can resist pH change upon the addition of an acidic or basic components. It is able to neutralize small amounts of added acid or base,thus maintaining the pH of the solution relatively stable.This is important for processes and/or reactions which require specific and stable pH ranges.
I hope it's helpful!
Model B: In this model the atom is a solid sphere that cannot be divided up into smaller
particles or pieces. The atom is neutral and has no charge. Atoms of the same element are
mad of the same types of atoms.
Model D: In this model the atom is a sphere containing negatively charges particles
embedded in it. These small negative particles were originally called “corpuscles”
and later called electrons. However it was recognized that the atom is neutral (no
charge) so there must be an equal positive charge in the atom to offset the negative
charge of the electrons. Since no other particles were known at this time the rest of
the atom consisted of a positive charge.
It is possible to remove a negatively charged particle from an atom using electrical forces
(Thompson, 1897). Compare models B and D. Which model supports this evidence?
Answer:
They are called corpuscles
Explanation:
Under what conditions of temperature and pressure do real gases behave most like ideal gases?
1) high temperature and high pressure
2) high temperature and low pressure
3) low temperature and high pressure
4) low temperature and low pressure
Real gases behave most like ideal gases under conditions of high temperature and low pressure. Option 2 is correct.
This is because at high temperatures, the kinetic energy of gas molecules increases, causing them to move faster and collide more frequently, which reduces the intermolecular forces between the gas molecules. At low pressures, the gas molecules are farther apart and the intermolecular forces are weaker, allowing the gas molecules to move more freely and behave more like an ideal gas.
At high pressures and low temperatures, the gas molecules are closer together and the intermolecular forces are stronger, causing deviations from ideal gas behavior. Hence the correct option is 2.
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ASAP PLS
Identify the correct formula for each of the following compounds.
Carbon tetrabromide
4CBr
CBr4
C4Br
Chlorine monofluoride
ClF
FCl
Cl1F1
Answer:
1.CBr4
2.CIF
Explanation:
Covalent compound are formed by sharing of electron and ionic compound formed by complete transfer of electron. The chemical formula for Carbon tetrabromide is CBr₄ and for Chlorine monofluoride is ClF.
What is chemical Compound?Chemical Compound is a combination of molecule, Molecule forms by combination of element and element forms by combination of atoms in fixed proportion.
Ionic compounds are more stronger than covalent compound. Ionic compounds have higher melting and boiling point than covalent compounds.
The chemical formula for Carbon tetrabromide is CBr₄, tetra means four. The chemical formula for Chlorine monofluoride is ClF, mono means one.
Therefore, the chemical formula for Carbon tetrabromide is CBr₄ and for Chlorine monofluoride is ClF.
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If enough aluminum fluoride decomposes to produce 3. 40L of fluorine at STP,
then how many atoms of aluminum metal are expected to be recovered and
weighed?
To determine the number of aluminum atoms recovered and weighed, we need to consider the stoichiometry of the reaction between aluminum fluoride (AlF3) and fluorine (F2). The balanced chemical equation for the reaction is:
2 AlF3 → 2 Al + 3 F2
From the equation, we can see that for every 2 moles of aluminum fluoride that decompose, we obtain 2 moles of aluminum metal. Additionally, 3 moles of fluorine gas are produced.
Given that the volume of fluorine gas produced is 3.40 L at STP (standard temperature and pressure), we can use the ideal gas law to determine the number of moles of fluorine gas:
PV = nRT
Where P is the pressure (STP = 1 atm), V is the volume (3.40 L), n is the number of moles, R is the ideal gas constant (0.0821 L·atm/(mol·K)), and T is the temperature in Kelvin (STP = 273.15 K).
Using the ideal gas law, we can calculate the number of moles of fluorine gas:
n = PV / RT = (1 atm) * (3.40 L) / (0.0821 L·atm/(mol·K) * 273.15 K)
Once we have the number of moles of fluorine gas produced, we know that the molar ratio between aluminum and fluorine is 2:3. Therefore, the number of moles of aluminum metal recovered will be two-thirds of the moles of fluorine gas.
To find the number of aluminum atoms, we can multiply the number of moles of aluminum by Avogadro's number, which is approximately 6.022 x 10^23 atoms/mol.
Finally, to find the weight of the aluminum metal, we need to know the molar mass of aluminum and multiply it by the number of moles.
Given the necessary input values, we can perform the calculations to determine the number of aluminum atoms recovered and the weight of the aluminum metal.
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To determine the number of aluminum atoms recovered and weighed, we need to consider the stoichiometry of the reaction between aluminum fluoride (AlF3) and fluorine (F2). The balanced chemical equation for the reaction is:
2 AlF3 → 2 Al + 3 F2
From the equation, we can see that for every 2 moles of aluminum fluoride that decompose, we obtain 2 moles of aluminum metal. Additionally, 3 moles of fluorine gas are produced.
Given that the volume of fluorine gas produced is 3.40 L at STP (standard temperature and pressure), we can use the ideal gas law to determine the number of moles of fluorine gas:
PV = nRT
Where P is the pressure (STP = 1 atm), V is the volume (3.40 L), n is the number of moles, R is the ideal gas constant (0.0821 L·atm/(mol·K)), and T is the temperature in Kelvin (STP = 273.15 K).
Using the ideal gas law, we can calculate the number of moles of fluorine gas:
n = PV / RT = (1 atm) * (3.40 L) / (0.0821 L·atm/(mol·K) * 273.15 K)
Once we have the number of moles of fluorine gas produced, we know that the molar ratio between aluminum and fluorine is 2:3. Therefore, the number of moles of aluminum metal recovered will be two-thirds of the moles of fluorine gas.
To find the number of aluminum atoms, we can multiply the number of moles of aluminum by Avogadro's number, which is approximately 6.022 x 10^23 atoms/mol.
Finally, to find the weight of the aluminum metal, we need to know the molar mass of aluminum and multiply it by the number of moles.
Given the necessary input values, we can perform the calculations to determine the number of aluminum atoms recovered and the weight of the aluminum metal.
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arlon drank 500 mL of softdrink which had a mass of 450 g.
a. 1.11 g/mL c. 0.9 g/mL
b. 50 g/mL d. 225000 g/mL
Answer:
0.9 g/mLExplanation:
The density of a substance can be found by using the formula
\(d = \frac{m}{v} \\ \)
where
m is the mass
v is the volume of object
From the question we have
m = 450 g
v = 500 ml
\(d = \frac{450}{500} = \frac{9}{10} \\ = 0.9\)
We have the final answer as
0.9 g/mLHope this helps you
Answer:
B) g/mL
Explanation:
Mass of Oxalic acid (solute) = 11g
Mass of Solution = 500ml
Density = 1.1 g/ml
We know that
Mass % of solute =
Massofsolution
Massofsolute×100
×
50
Mass of solution =
Volume of solution×
Density of solution
Mass of solution =
500×
1.1=
50×
11g
Mass % of the solute =
11×50
11×100
=
2%
how do you determine the ph of a buffer? is there a difference in ph between the buffer in
To determine the pH of a buffer, you can use a pH meter or pH indicator, as mentioned earlier.
A buffer is a solution that can resist changes in pH when small amounts of acid or base are added to it. Buffers are typically composed of a weak acid and its conjugate base (or a weak base and its conjugate acid) in relatively equal concentrations.
The pH of a buffer solution is determined by the equilibrium between the weak acid and its conjugate base, which acts as a pH control mechanism.
In an acidic solution, the weak acid component of the buffer predominates, and the pH of the buffer will be slightly acidic. As acid is added to the solution, the weak acid component of the buffer reacts with the added acid, minimizing changes in pH.
In a basic solution, the conjugate base component of the buffer predominates, and the pH of the buffer will be slightly basic. As the base is added to the solution, the conjugate base reacts with the added base, minimizing changes in pH.
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Explain how surface waves work.
Which of the following is not part of a phospholipd?
A) galactose
B) fatty acid
C) phosphate
D) glycerol
Pls help due today
Answer:
A) Glycerol
Explana
1s22s22p63s23p3 atoms of an element, x, have this electron configuration. The compound most likely formed with magnesium, Mg, is
A. MgX
B. Mg2X
C. MgX2
D. Mgx3
E. MgX2
Answer:
Mg3X2 is correct answerrrrrr
What is the maximum number of grams of h2s that can be produced from 2 mol of sulfate ions by the reaction of equation 1?
To determine the maximum number of grams of H2S that can be produced from 2 mol of sulfate ions, you need to use stoichiometry. The equation 1 you mentioned is not provided in the question. However, I can provide a general approach to solving this type of problem.
1. Start by balancing the chemical equation if it is not already balanced.
2. Determine the mole ratio between sulfate ions and H2S. This can be found by looking at the coefficients of sulfate ions and H2S in the balanced equation.
3. Multiply the number of moles of sulfate ions (2 mol) by the mole ratio to find the number of moles of H2S that can be produced.
4. Finally, convert the moles of H2S to grams using the molar mass of H2S.
Remember to always use the molar masses of the substances involved in the reaction to convert between moles and grams.
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Substances formed as a result of a chemical reaction are calledImmersive Reader (1 Point) products reactants catalysts precipitates
Answer: substances formed as a result of chemical reaction are called PRODUCTS.
Explanation:
A chemical reaction can be defined as a reaction in which substances known as the REACTANTS makes or breaks it's bonds to form another substance usually referred to as the PRODUCT. Usually, a new substance which is referred to as the product that is formed is different from the original reacting substances. Some of the characteristics of a chemical reaction include:
--> colour change,
--> heat production,
--> precipitation
The rate at which these chemical reaction occurs depends on some factors such as pressure, temperature and concentration of the reactants
There are different examples of chemical reaction which includes:
--> Rusting of iron: this occurs when iron and oxygen combines to form a mixture of iron oxides, which is the product of the chemical reaction.
--> The burning of magnesium in air: in this Chemical reaction, magnesium reacts with oxygen to form magnesium oxide which is the product of the chemical reaction.
2Mg(s) + O2(g) △→ 2MgO(s)
--> Production of table salt: this is formed from the reaction of sodium and chloride to give sodium chloride as the product of the chemical reaction.
Therefore in a chemical reaction, no atom is destroyed or created but a new PRODUCT is formed from reactants.
What was the nickname given to Mendeleyev by the other chemists in Europe? Why did they give him that name?
Answer:
Low Chemist
Explanation:
A scientific name that was given to only the nobleist of its time.
Which of the following statements concerning mixtures is correct?
a. The composition of a homogeneous mixture cannot vary.
b. A homogeneous mixture can have components present in two physical states.
c. A heterogeneous mixture containing only one phase is an impossibility
d. More than one correct response..
The correct option from the given statements concerning mixtures is (d) more than one correct response.
The statement (a) "The composition of a homogeneous mixture cannot vary" is incorrect as the composition of a homogeneous mixture can vary. For example, a mixture of salt and water is homogeneous and its composition can vary depending on the amount of salt and water mixed in it.
The statement (b) "A homogeneous mixture can have components present in two physical states" is correct. Homogeneous mixtures are mixtures that are uniform throughout their composition, meaning that there is no visible difference between the components of the mixture. For example, a mixture of ethanol and water is homogeneous and its components are present in two physical states (liquid and liquid).
The statement (c) "A heterogeneous mixture containing only one phase is an impossibility" is incorrect. A heterogeneous mixture is a mixture where the components are not evenly distributed and the mixture has different visible regions or phases. However, it is possible for a heterogeneous mixture to contain only one phase. For example, a mixture of oil and water is heterogeneous but can have only one phase.
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as a result of the reactions of the citric acid cycle, the carbons from acetyl coa are released as........
As a result of the reactions of the citric acid cycle, the carbons from acetyl CoA are released as carbon dioxide.
What is citric acid cycle?The Citric Acid Cycle derives its name from the reaction that occurs when acetyl via acetyl coenzyme A and oxaloacetate combine to generate citrate.
Since the enzymes extract carbon (in the carbon dioxide form) and hydrogen/electrons, intermediate molecules are created. As a byproduct, carbon dioxide is emitted. As a result of the reactions of the citric acid cycle, the carbons from acetyl CoA are released as carbon dioxide.
Therefore, as a result of the reactions of the citric acid cycle, the carbons from acetyl CoA are released as carbon dioxide.
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how many significant figures are in 6? thanks!
Answer:
There is only 1 sig figures in 6
Explanation:
There is no 0 after it so it is considered as only 1 significant figure
which metal is liquid and has silvery-white color.
Answer:
Mercury
Explanation:
It is also highly toxic
what is the anode material used in the extraction of aluminium by electrolysis and why it needs to be changed at interval
Answer:
the anode material is graphite(replaceable graphite rods).
The oxygen gas burns away the anode as Carbon dioxide therefore the anode must be replaced continuously.