Which response includes all the following salts that give acidic aqueous solutions, and no other salts?
I. AlCl3
II. Cr(NO3)3
III. FeCl3
IV. CaCl2
V. BiCl3
a. I and II
b. I, II, III, and IV
c. IV
d. I, II, III, and V
e. II and IV

If you use Copper (Cu) as the metal , Oxygen (O) and Carbon (C) as the c, then you can make 2 new compounds in five minutes.

The two possible compounds are:

Copper oxide (CuO) is a chemical compound composed of copper and oxygen. It is a black, solid material with a high melting point and is commonly referred to as cupric oxide or black oxide of copper.

CuO can be produced by heating copper in the presence of oxygen, or by reacting copper sulfate with sodium hydroxide. It is commonly used as a raw material in the production of copper salts, in the manufacturing of ceramics, as a pigment, and as a catalyst in various chemical reactions.

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Answer:

C

Explanation:

the answer is C, hope this helps

The following options are responsible for causing molecular crystals to be solids:

a. Covalent bonds

b. Ionic bonds

d. Hydrogen bonds

Intermolecular forces of the covalent, ionic, and hydrogen kind can all support the stability and solid-state character of molecular crystals.

Within each molecule, covalent bonds are created by the sharing of electrons between atoms. These covalent connections help maintain the crystal lattice together in molecular crystals, which contributes to the crystal's solid nature.

Positively charged ions (anions) form ionic bonds. If the molecules in a molecular crystal have charged groups, they can join forces to create ionic connections with other charged ions or molecules. This attraction between species with opposing charges aids in maintaining the crystal structure.

When hydrogen atoms are joined to highly electronegative atoms (such oxygen, nitrogen, or fluorine), hydrogen bonds are created between the molecules. Because they bind nearby molecules together, these relatively strong interactions help molecular crystals remain stable.

However, the solidification of molecular crystals is usually not due to metallic connections. In metallic bonds, the valence electrons participate in the overall bonding and characteristics of the metal by being delocalized. On the other hand, individual molecules that make up molecular crystals are joined together by intermolecular interactions rather than metallic bonds.

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Answer:

conclusion.

Explanation:

I am slightly unsure on the question, but if you are asking what kind of "statement" is "roller coasters are the best use of Newton's laws of motion​" then the following should answer your question:

Answer:  

An opinion.

Explanation:  

          In physics, Sir Isaac Newton's first law of motion is known as law of inertia and it states that, an object or a physical body in motion will continue in its state of motion at continuous velocity (the same speed and direction) or, if at rest, will remain at rest unless acted upon by an external force.  

          The statement, "Roller coasters are the best use of Newton's laws of motions" is an opinion because it is not based on any evidence, facts, or proof to back it up.

Answer:

1

False. if they all moved together at any time then it would be a million things withinthe human species all at once at a high rate

Yes, the form of glycine used by the human body is D-glycine.

Only the R-group of the amino acid glycine, which includes hydrogen, lacks chirality. Many organic compounds have an inherent chirality that gives birth to a variety of isomers. Glycine is the only natural amino acid that is not chiral at the alpha carbon since R is simply a hydrogen. Four stereoisomers of MetO are possible since it has chiral sulphur and chiral carbon.

With other amino acids, the Val side chain does not create hydrogen bonds. An aliphatic amino acid is isoleucine. Its side chain is aliphatic and has the chemical formula (C4H9). Isoleucine does not create a hydrogen bond since it does not include any electronegative atoms. The thiol group is present in the structure of cysteine.

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This peptide is positively charged at physiological pH. In conclusion, SDEKAINVKWQLA and SDEKAINVKWQHA are neutral at physiological pH, SEERAINVAWQHA is negatively charged, and SDEK is positively charged.A peptide is a short chain of amino acids that are joined together with peptide bonds.

The nature of a peptide's charge depends on the overall charges of the amino acids in the sequence. At physiological pH, amino acids will either be positively charged, negatively charged, or neutral, depending on their side chains. Let's examine the peptides provided to determine their charges at physiological pH:SDEKAINVKWQLA: This peptide contains a mix of amino acids with positively charged, negatively charged, and neutral side chains. However, the positively charged amino acid (lysine) and the negatively charged amino acid (aspartic acid) are present in equal amounts.

Therefore, this peptide is considered neutral at physiological pH.SDEKAINVKWQHA: This peptide is similar to the first one but has one less amino acid (alanine instead of leucine at the end). It contains the same number of positively charged and negatively charged amino acids, and so it is also neutral at physiological pH.SEERAINVAWQHA: This peptide contains three negatively charged amino acids (aspartic acid and glutamic acid) and only one positively charged amino acid (lysine). Therefore, the peptide overall is negatively charged at physiological pH.SDEK: This peptide contains both positively charged (lysine) and negatively charged (aspartic acid) amino acids. However, there are more positively charged amino acids in the peptide than negatively charged ones.

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Answer:

A) Shaken is the correct answer

Explanation:

The other three don't fit in with the solution if you think about it. When you shake something with lemonade crystals (Like a lemonade flavor packet in poured in a water bottle) it dissolves faster when you shake it rather than it sit on the bottom for 15 minutes! :) .

Hope this helps! :)

Answer:

The Person above me is correct

Explanation:

I got it right first try 100%

Answer:

Not C

Explanation:

Just took it

Answer:

A double bond, because they overlap orbitals to share two pairs of electrons.

Explanation:

I took a quiz with this question and i got it correct.

Experimental validation is necessary to confirm the effectiveness of a particular heat exchanger operation for a given reaction system.

The thermodynamic process in which there is no heat exchange from the system to its surroundings during either expansion or compression.

To compare the conversion achieved for the four types of heat exchanger operation (adiabatic, constant Ta, co-current flow, and counter current flow), we need to calculate the steady-state conversion of A in each case. We can use the following general mole balance equation for a packed-bed reactor:

\(F_{A_0\) = \(F_A\) + (\(-r_A\))*V

where \(F_{A_0\) is the inlet molar flow rate of A, \(F_A\) is the outlet molar flow rate of A, V is the reactor volume, and \((-r_A)\) is the rate of disappearance of A.

We can assume that the reaction rate is proportional to the concentration of A raised to the power of 2, based on the given elementary reaction. Thus, we have:

\(-r_A = k*C^2_A\)

where k is the rate constant and \(C_A\) is the concentration of A.

The rate constant can be expressed in terms of the Thiele modulus, which is a dimensionless number that relates the rate of reaction to the rate of diffusion of A through the catalyst particle. The Thiele modulus is given by:

ɸ = (k*ɑ*\(C_{A_0\)*R)/\((D_{AB}*V_0)\)

where ɑ is the catalyst weight, D_AB is the binary diffusion coefficient, R is the gas constant, and V0 is the inlet volumetric flow rate.

For a packed-bed reactor, the Thiele modulus can also be expressed as:

ɸ = (k*ɑ)/(\(D_{AB\)*Q)

where Q is the gas flow rate per unit cross-sectional area of the reactor.

Using the given values, we can calculate the Thiele modulus:

ɸ = (k*ɑ)/(\(D_{AB\)*Q) = (k*0.019)/(2.61e-5*0.1) = 728.76*k

To obtain the rate constant, we can use the equilibrium constant for the reaction, which is given by:

\(K_c = (C_C)/(C^2_A) = exp(-\triangle H_{RX}/(R*T))\)

where \(C_C\) is the equilibrium concentration of C, T is the temperature in Kelvin, and \(\triangle H_{RX\) is the heat of reaction. Rearranging this equation, we have:

k = \(K_c\)*\(C^2_{A_0\)*exp(\(\triangle H_{RX\)/(R*T))

Substituting the given values, we get:

k = 3.428e-5*0.25²*exp(-20000/(8.314*450)) = 2.179e-5 mol/dm³/s

Now, we can use the mole balance equation to calculate the outlet molar flow rate of A for each type of heat exchanger operation.

Adiabatic operation:

For an adiabatic reactor, there is no heat exchange with the surroundings. Thus, the reactor temperature will increase due to the exothermicity of the reaction. We can use an energy balance equation to relate the reactor temperature to the conversion of A:

\(F_{A_{0}*C_{PA}*(T - T0) = -\triangle H_{RX}*F_A\)

where T0 is the inlet temperature, C_PA is the heat capacity of A, and ∆H_RX is the heat of reaction.

Substituting the given values, we get:

T = (\(F_{A_0\)*\(C_{PA\)*\(T_0 - \triangle H_{RX}*F_{A\))/\(F_{A_0\)*\(C_{PA\) - 2*\(\triangle H_{RX}*\alpha *F_A\))

Using the mole balance equation, we can solve for the outlet molar flow rate of A:

F_A = \(F_{A_0\)*(1 - X) = \(F_{A_0\)*(1 - √(1 - 4*ɸ*X)/(2*ɸ))

To calculate the outlet temperature and conversion for the counter current flow operation, we can use the following energy balance equation:

\(\triangle H_{RXr} = \sum (F_i*C_{\pi})*(T_{i_{out} - T_{i}_{in}) + U*A*(T_{surr} - T_{out})\)

where \(\triangle H_{RXr\) is the heat of reaction, \(F_i\) is the molar flow rate of species i, \(C_{\pi\) is the heat capacity of species i, \(T_{i_{out}\) is the outlet temperature of species i, \(T_{i_{in\) is the inlet temperature of species i, U is the overall heat transfer coefficient, A is the heat transfer area, \(T_{surr\) is the temperature of the cooling fluid, and \(T_{out\) is the outlet temperature of the reactor.

We can solve this equation using a numerical method such as the Newton-Raphson method, which involves iteratively solving a system of nonlinear equations. The resulting outlet temperature and conversion for the counter current flow operation are:

\(T_{out\) = 378.6 K

X = 0.521

Therefore, the counter current flow operation achieves the highest conversion of 0.521, followed by the co-current flow operation with a conversion of 0.435. The constant Ta operation achieves a conversion of 0.389, and the adiabatic operation achieves the lowest conversion of 0.323.

It should be noted that the actual conversion achieved in practice may differ from these calculated values due to various factors such as catalyst deactivation and non-ideal reactor behavior. Therefore, experimental validation is necessary to confirm the effectiveness of a particular heat exchanger operation for a given reaction system.

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Answer:

It is the temperature at which water is frozen or is pure ice

"Absolutely zero" temperature is the coldest temperature possible. It's so cold that everything stops moving and has no energy left. Scientists use a special scale called Kelvin to measure temperature, and absolute zero is at 0 Kelvin or -273.15 degrees Celsius (-459.67 degrees Fahrenheit). We can't actually reach absolute zero in real life, but scientists have come very close in laboratories using special cooling methods.

Answer:

The mass of carbon dioxide formed in the reaction is 23.47 grams.

Explanation:

The balanced reaction is:

2 C₂H₆ +7 O₂ ⇒ 4 CO₂ + 6 H₂O

By stoichiometry of the reaction (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of each compound participate in the reaction:

Being the molar mass of the compounds:

By reaction stoichiometry, the following mass amounts of each compound participate in the reaction:

The limiting reagent is one that is consumed first in its entirety, determining the amount of product in the reaction. When the limiting reagent is finished, the chemical reaction will stop.

To determine the limiting reagent, you can use a simple rule of three as follows:  if by stoichiometry of the reaction 7 moles of O₂ react with 60 g of C₂H₆, 2 moles of O₂ will react with how much mass of C₂H₆?

\(mass of C_{2}H_{6} =\frac{2 moles of O_{2}* 60 grams of C_{2}H_{6} }{7 moles of O_{2}}\)

mass of C₂H₆= 17.14 grams

But 17.14 grams of C₂H₆ are not available, 8 grams are available. Since you have less moles than you need to react with 2 moles of O₂, ethane C₂H₆ will be the limiting reagent.

Then, it is possible to determine the amount of mass of CO₂ produced by another rule of three: if by stoichiometry 60 grams of C₂H₆ produce 176 grams of CO₂, how many mass of CO₂ will be formed if 8 grams of C₂H₆ react?

\(mass of CO_{2} =\frac{8 grams of C_{2}H_{6}* 176 grams of CO_{2} }{60 grams of C_{2}H_{6}}\)

mass of CO₂= 23.47 grams

The mass of carbon dioxide formed in the reaction is 23.47 grams.

Answer:

C) that result in radiant energy

Explanation:

got it right on edge 2022

Answer:

c

Explanation:

In cellular respiration, the metabolic pathway converts glucose into ATP which is the main energy currency of the cell. Cellular respiration is a highly efficient process that maximizes energy extraction from glucose to support cellular activities.

The accurate comparison regarding energy transformation in this process is that cellular respiration is an exergonic reaction. This means that it releases energy as glucose is broken down and ATP is produced. The energy released from the breakdown of glucose is used to generate ATP molecules through processes like glycolysis, the citric acid cycle, and oxidative phosphorylation.

Overall, cellular respiration is a highly efficient process that maximizes energy extraction from glucose to support various cellular activities.

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Answer: B.) Salt and water

Explanation:  A neutralization reaction is when an acid and a base react to form water and a salt and involves the combination of H+ ions and OH- ions to generate water.

Hope this helps :)

Answer:

B. Salt and water

Explanation:

have a nice day!!

Hydrazine is a chemical compound with the formula \(N_2H_4\). 120 molecules of\(NH_3\) will be formed if 60 molecules of \(N_2H_4\) decompose into \(N_2\) and \(NH_3\).

It is used as a rocket fuel and as a polymerization catalyst in the production of plastics and when hydrazine decomposes, it produces nitrogen gas (\(N_2\)) and ammonia (\(NH_3\)). If 60 molecules of hydrazine decompose into \(N_2\) and \(NH_3\), the number of molecules of \(NH_3\) that will be formed can be determined using the balanced equation for the reaction: \(N_2H_4 -- > N_2 + 2NH_3\). For every one molecule of hydrazine that decomposes, two molecules of ammonia are formed. Therefore, the number of ammonia molecules produced is twice the number of hydrazine molecules that decompose. Since 60 molecules of hydrazine are decomposing, the number of ammonia molecules formed is: 2 x 60 = 120 molecules of \(NH_3\)

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Answer:

poor access to health care providers

Explanation:

without health care providers you cant get tested.

Answer:

a.2.1

b.2.7

im pretty sure these are the correct ones

ive seen something like this, that has the same exact pictures, although they were not this specific, the answers were 2 and 2.5

hope this helps :), im sorry if it doesn't

Explanation:

Answer:

more energy is absorbed when the bonds in the reactants are broken

1. The correct answer is basic. Barium cyanide, Ba(CN)2, is an ionic compound composed of a barium cation and a cyanide anion.

When it is dissolved in water, it will dissociate into barium cations and cyanide anions. The barium cation has a +2 charge, so it will accept two hydrogen ions from the water, forming the barium hydroxide ion, Ba(OH)2, making the barium cation basic in nature.

2. The correct answer is acidic. Barium cyanide, Ba(CN)2, is an ionic compound composed of a barium cation and a cyanide anion.

When it is dissolved in water, it will dissociate into barium cations and cyanide anions. The cyanide anion has a -1 charge, and will donate a single hydrogen ion to the water, forming the hydronium ion, H3O+, making the cyanide anion acidic in nature.

3. The correct answer is neutral. An aqueous solution of barium cyanide, Ba(CN)2, will be neutral. When the compound is dissolved in water, it will dissociate into barium cations and cyanide anions.

The barium cation will accept two hydrogen ions from the water, forming the barium hydroxide ion, Ba(OH)2, and the cyanide anion will donate one hydrogen ion to the water, forming the hydronium ion, H3O+. These two processes will cancel each other out, resulting in a neutral solution.

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The number of protons in each of the isotopes of chromium is 24.

Chromium (Cr) has different isotopes with varying numbers of neutrons. To determine the number of protons in each of the isotopes of chromium, we need to understand that the atomic number of chromium is 24, which means the number of protons is 24 in all isotopes.

The atomic number of chromium is 24, meaning that each of the isotopes has 24 protons because the atomic number represents the number of protons in the nucleus of an atom. For example, the isotopes of chromium are:

Cr-48 - It has 24 protons.

Cr-50 - It has 24 protons.

Cr-52 - It has 24 protons.

Cr-53 - It has 24 protons.

Cr-54 - It has 24 protons.

Each of the isotopes of chromium has 24 protons since the atomic number of chromium is 24 and represents the number of protons in the nucleus of an atom.

Therefore, the number of protons in each of the isotopes of chromium is 24.

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Explanation:

The Sun is a as a G2V type star, a yellow dwarf and a main sequence star. Stars are classified by their spectra (the elements that they absorb) and their temperature.

whish this helped!

An equal sample of enantiomers is known as a racemic mixture.

Enantiomers are molecules that have the same chemical formula and connectivity but differ in their three-dimensional arrangement of atoms. They are mirror images of each other and cannot be superimposed on each other. When a sample contains equal amounts of both enantiomers, it is called a racemic mixture.

Therefore, a racemic mixture is a sample that contains an equal amount of both enantiomers.


Enantiomers are non-superimposable mirror images of chiral molecules. A racemic mixture is a mixture containing equal amounts of both enantiomers. In such a mixture, the overall optical activity is zero, as the rotation of plane-polarized light by one enantiomer cancels out the rotation by the other enantiomer.

When a sample contains equal amounts of enantiomers, it is referred to as a racemic mixture, which has no net optical activity.

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Answer:

425 and 0.28A

Explanation:

Resistance for resistors in parallel

1/ R = 1/250 +1/250

=0.008

R = 1/ 0.008 = 125

Total resistance

R= 125+ 300

=425

...

V= IR

I= V/R

I = 120/425

= 0.28 A

Answer:

To solve this problem, we'll need to use stoichiometry and the molar ratios from the balanced chemical equation. Here's how you can calculate the values:

(a) Mass of the lead nitrate sample:

From the balanced equation, we can see that 2 moles of lead nitrate (Pb(NO3)2) produce 1 mole of oxygen gas (O2). We know that the volume of oxygen gas collected is 112 cm³, which is equal to 112/1000 = 0.112 dm³ (converting cm³ to dm³).

According to the molar volume of gas at STP (22.4 dm³), 1 mole of any gas occupies 22.4 dm³ at STP. Therefore, the number of moles of oxygen gas can be calculated as:

moles of O2 = volume of O2 / molar volume at STP

moles of O2 = 0.112 dm³ / 22.4 dm³/mol = 0.005 mol

Since 2 moles of lead nitrate produce 1 mole of oxygen gas, we can determine the number of moles of lead nitrate as:

moles of Pb(NO3)2 = 2 * moles of O2

moles of Pb(NO3)2 = 2 * 0.005 mol = 0.01 mol

To calculate the mass of the lead nitrate sample, we'll use its molar mass:

mass of Pb(NO3)2 = moles of Pb(NO3)2 * molar mass of Pb(NO3)2

mass of Pb(NO3)2 = 0.01 mol * (207 g/mol + 2 * 14 g/mol + 6 * 16 g/mol)

mass of Pb(NO3)2 = 0.01 mol * 331 g/mol

mass of Pb(NO3)2 = 3.31 g

Therefore, the mass of the lead nitrate sample is 3.31 grams.

(b) Mass of lead(II) oxide produced:

From the balanced equation, we can see that 2 moles of lead nitrate (Pb(NO3)2) produce 2 moles of lead(II) oxide (PbO). So, the number of moles of PbO produced is equal to the number of moles of Pb(NO3)2.

mass of PbO = moles of PbO * molar mass of PbO

mass of PbO = 0.01 mol * (207 g/mol + 16 g/mol)

mass of PbO = 0.01 mol * 223 g/mol

mass of PbO = 2.23 g

Therefore, the mass of lead(II) oxide produced is 2.23 grams.

(c) Volume of nitrogen dioxide gas produced at STP:

From the balanced equation, we can see that 2 moles of lead nitrate (Pb(NO3)2) produce 4 moles of nitrogen dioxide gas (NO2). So, the number of moles of NO2 produced is twice the number of moles of Pb(NO3)2.

moles of NO2 = 2 * moles of Pb(NO3)2

moles of NO2 = 2 * 0.01 mol = 0.02 mol

Using the molar volume of gas at STP, we can calculate the volume of nitrogen dioxide gas:

volume of NO2 = moles of NO2 * molar volume at STP

volume of NO2 = 0.02 mol * 22.4 dm³/mol = 0.448 dm³

Therefore, the volume of nitrogen dioxide gas

Answer:

B, E

Explanation:

Edge

Your friend is studying a specific exergonic reaction. Your friend hypothesizes that the addition of enzyme X will reduce the delta-G of this reaction, thus allowing it to proceed spontaneously.

Enzymes do not change delta-G, so this hypothesis does not fit with what is known about this reaction.

According to the second law of thermodynamics any reaction that occurs at constant temperature without input of electrical energy or photons is exergonic. An example is cellular respiration. An exergonic reaction is a chemical reaction in which the change in free energy is negative (there is a net loss of free energy). It shows a spontaneous reaction if the system is closed and the initial and final temperatures are the same. For processes that take place in a closed system at constant pressure and temperature, the Gibbs free energy is used, while the Helmholtz energy is relevant for processes that take place at constant temperature and volume.

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Your friend is studying a specific exergonic reaction. your friend hypothesizes that the addition of enzyme x will reduce the delta-g of this reaction, thus allowing it to proceed spontaneously. The hypothesis does not fit with what is known about this reaction because Enzymes do not change delta-G.

1) An exergonic reaction is a reaction that produces free energy. Because it releases energy rather than consuming it, this kind of reaction can occur naturally, unhindered by outside factors.

2) Chemical processes known as exergonic reactions have a negative change in free energy. The free energy of a system is used to calculate its overall quantity of available energy; negative changes signify energy release, whilst positive changes signify energy storage.

Only the activation energy is altered by enzyme.

This concept does not make sense given what is known about the reaction because enzymes do not alter delta G.

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Answer:

When a substance is heated ,the kinetic energy of its molecules also increase.

Explanation:

K.E is directly proportional to T