A particle diagram is a symbolic representation of atoms and molecules at the microscopic level. Which of the following particle diagrams represents the following stage of the PbI procedure:

In the test tube before the vacuum filtration

Answer:68.57

Explanation:

If two solutions are separated by a semipermeable membrane with one side 1.5 M NaCl solution and other side 0.5 M KBr solution. Here water will flow from the KBr solution to the NaCl solution because of the water concentration difference.

When two solutions are separated with a semipermeable membrane, the water will flow from lower solute concentrated side to higher solute concentrated side.

Lower solute concentration means the water content will be high and that states higher water concentration.

Higher solute concentration means the water content will be low and that states low water concentration.

The water will flow from higher concentration to lower till the equilibrium where both sides the water and solute concentration is same.

In this case, the lower solute concentration is the 0.5 M KBr solution and the higher solute concentration is the 1.5 M NaCl solution.

Therefore, water will tend to flow from the KBr solution to the NaCl solution.

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The atmospheric conditions at a particular time.

i did the test.

Answer:

the atmospheric conditions at a particulur time

Explanation:

Plasmids help you obtain the copies of the gene you need.

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Answer:

7822 kJ

Explanation:

The formula for acetone is: CH3COCH3

From the standard bond energy(enthalpy):

C - H bond = 412

C - C bond = 348

C = O bond = 743

From the structure of an acetone

C is bonded to H in six places;

so, for  C- H bond = 6 × 412 = 2472

C is only bonded to two other carbon atoms

For C - C bond = 2 × 348 = 696

Carbon is only doubly bonded to an oxygen atom

For C = O bond = 1 × 743 = 743

∴

The total net energy bond in a mole = (2472 + 696 + 743) kJ/mol

= 3911 kJ/mol

Finally, in 2 moles of acetone, the required amount of energy will be:

= 3911 kJ/moles × 2 moles

= 7822 kJ

Mesosaurus lived in freshwater lakes and ponds. Elongated and slim, it measured about 3.3 feet long. The skull and tail were both long and narrow, and the animal probably undulated through the water as it fed on small crustaceans and other prey with its jaws, which were full of long, thin, pointed teeth.

BaSO4 (s) + Cu(NO3)2 (aq)  and KCl (s) + Mg3(PO4)2 (s) is the product of given precipitation reactions.

Ba(NO3)2 (aq) + CuSO4 (aq) → BaSO4 (s) + Cu(NO3)2 (aq)

 K3 PO4 (aq) + MgCl2 (aq) → KCl (s) + Mg3(PO4)2 (s)

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The false statement about the gas expansion process is "∆S(system)=0".

When the gas expands into the vacuum, it undergoes an irreversible process. The gas molecules move from a region of high concentration to a region of low concentration, and as a result, there is an increase in entropy (∆S) of the gas.

According to the Second Law of Thermodynamics, the entropy of an isolated system will always increase for an irreversible process. Therefore, the entropy of the system, in this case, the gas, increases as it expands into the vacuum. The false statement about the gas expansion process is "∆S(system)=0". The other statements are true for this process. Since there is no temperature difference between the gas and the surroundings, the change in temperature is zero (∆T=0). The change in internal energy (∆E) is also zero since the gas is expanding against no external pressure. Finally, since there is no heat transfer between the system and the surroundings, the work done (∆PE + ∆KE) is equal to the heat transfer (w = q).

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Answer:

a) The lewis dot structure is shown in the image attached to this answer

b) The formal charge on each of the atoms is zero

c) bromine has an oxidation state of +5 while fluorine has an oxidation state of -1

d) 90 degrees

e) Square Pyramidal

f) polar bonds

g) polar molecule

Explanation:

The molecule BrF5 has a formal charge of zero. It exhibits an sp3d2 hybridization state with a square pyramidal geometry. The bond angle in the molecule is 90 degrees. It is a molecule of the type AX5E. The oxidation state of bromine is +5 while that of fluorine is -1.

The Br-F bonds are polar. The overall molecule is polar due to asymmetric charge distribution concentrating on the central atom since the molecule is square pyramidal.

Answer:

Silicon????

Explanation:

I searched your question and it gave me that. I hope it helps. If not sorry!

pH = 1.92, acidic

pH = 8.24, basic

pH = 11.41, basic

pH = 4.34, acidic

To calculate the pH of a solution, we use the formula:

pH = -log[H+]

where [H+] is the concentration of hydrogen ions in moles per liter.

For [H+] = 1.2 x 10^-2 M:

pH = -log(1.2 x 10^-2) = 1.92

This solution is acidic.

For [H+] = 5.8 x 10^-9 M:

pH = -log(5.8 x 10^-9) = 8.24

This solution is basic.

For [H+] = 3.92 x 10^-12 M:

pH = -log(3.92 x 10^-12) = 11.41

This solution is basic.

For [H+] = 4.52 x 10^-5 M:

pH = -log(4.52 x 10^-5) = 4.34

This solution is acidic.

So, the pH and nature of the solutions are:

pH = 1.92, acidic

pH = 8.24, basic

pH = 11.41, basic

pH = 4.34, acidic

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Answer:

1. Oxidation-reduction and hydrolysis

2. Oxidation-reduction

3. Dehydration

Explanation:

Our options for each reaction are:

a) Oxidation‑reduction reaction

b) Esterification reaction

c) Amidation reaction

d) Hydrolysis reaction

c) Hydration reaction

f) Dehydration reaction

In reaction one the have the rupture of the S-CoA bond. This reaction takes place by the addition of a water molecule and the oxidation to a carboxylic acid group. So, for reaction 1 we will have an oxidation-reduction and a hydrolysis reaction.

For reaction 2, the functional group change from alcohol to a carboxylic acid. So, we have an oxidation-reduction reaction.

In the last reaction, we have the production of a double bond by the removal of water. With this in mind, we have a dehydration reaction.

See figure 1

I hope it helps

Answer:

The answer is

Explanation:

HCL is a strong acid and therefore undergo complete dissociation

We have

The concentration of Hydrogen ion is also 0.415 M

The pH of a solution can be found by using the formula

\(pH = - log( {H }^{ + } ) \)

So we have

\(pH = - log(0.415) \\ = 0.381951903...\)

We have the final answer as

Hope this helps you

Answer:

test her suspicion by checking to see whether other cats also make her sneeze

Answer:

\( \huge{4.969 \times {10}^{ - 19} \:J }\)

Explanation:

The energy of the purple lamp can be found by using the formula

E = hf

where

E is the energy

f is the frequency

h is the Planck's constant which is

6.626 × 10-³⁴ Js

From the question.

\( f = 7.5 \times 10^14 \: Hz \)

We have.

\( E = 6.626 \times 10^{-34} \times 7.5 \times 10^{14} \)

We have the final answer as

\(4.969 \times {10}^{ - 19} \: J\)

Answer:

The volume of Component 1 is 36 cubic inches.

Explanation:

To calculate the volume of a composite solid, we need to determine the individual volumes of the different components and then add them together.

In this case, the composite solid consists of multiple components with the following dimensions:

Component 1:

Length: 4 inches

Width: 3 inches

Height: 3 inches

To find the volume of Component 1, we multiply the length, width, and height together:

Volume of Component 1 = Length x Width x Height = 4 in x 3 in x 3 in = 36 cubic inches

Therefore, the volume of Component 1 is 36 cubic inches.

Please provide the dimensions of the remaining components of the composite solid, and I will calculate the total volume by summing up the individual volumes.

Answer:

cells -> tissues -> organs -> organ system

Answer:

Cells > tissues > Organs > Organs Systems

Explanation:

tissues are made of a group of cells

a specific organ is made up of a geoup of specific type of tissues

and a group of organs make up the organs system

Answer:

Neon is the tenth element with a total of 10 electrons. In writing the electron configuration for neon the first two electrons will go in the 1s orbital. Since 1s can only hold two electrons the next 2 electrons for Ne go in the 2s orbital. The remaining six electrons will go in the 2p orbital.

Explanation:

Explanation:

That the mass can neither be created nor destroyed in a chemical reaction.

Answer:

3/4 of a mol of Rust

Explanation:

The first thing you have to do is work from a balanced equation.

4Fe +  3O2 ====> 2Fe2O3

Left

4 Fe

6 Oxygens

Right

4Fe

2*3 = 6 Oxygens

So you have a balanced equation

4Fe +  3O2 ====> 2Fe2O3

 1.5                              x

The next (and last) thing to do is to set up a proportion

4/1.5 = 2/x                  Cross multiply

4x = 1.5*2                   Combine

4x = 3                         Divide by 4

4x/4 = 3/4          

x = 3/4 mol

The volume of 0.100M NaCl that would be required to make a 0.0350M solution of NaCl when diluted to 150.0mL with water is 52.5mL.

The volume of a diluted solution can be calculated using the following formula;

CaVa = CbVb

Where;

According to this question, 0.100M NaCl would be required to make a 0.0350M solution of NaCl when diluted to 150.0mL with water. The volume can be calculated as follows:

0.1 × Va = 0.0350 × 150

0.1Va = 5.25

Va = 52.5mL

Therefore, 52.5mL is the volume required to dilute the sodium chloride solution.

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In order for a nuclear equation to be considered balanced, both sides' sums of the atomic and mass numbers (subscripts and superscripts) must be the same.

What is mean by alpha decay and beta decay?

Alpha decay:

Beta-decay:

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The most polar covalent bond among the given bonds based on electronegativity is NCl.

The polarity of bonds occurs due to the electronegativity difference among the elements. The property of an atom to attract the electron density toward itself is known as electronegativity. The more the electronegativity difference, the higher the bond polarity.

Electronegativity - The tendency of an atom in a molecule to attract the shared pair of electrons towards itself is known as electronegativity.

The greater the electronegativity difference more the bond will be polar.

electronegativity order: N > P > As > Sb

So, correct order of polarity among the given bonds:

Ncl > Pcl > Ascl > Sbcl

So, the most polar covalent bond among the given bonds is Ncl.

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Magnesium is oxidized in a crucible with airborne oxygen, and the masses prior to and following the oxidation are recorded.

Its primary application is as a bleaching in the production of paper and fabric, but is also used to create rubber, pesticides (insecticides), and solvents. To destroy hazardous bacteria, chlorine is added to drinking water & swimming pool water.

Low levels moderate chlorine exposure can irritate the eyes, throat, and nose. Breathing air chlorine gas at higher concentrations can damage the lung by changing breathing, producing coughing, & changing breathing rate. Severe additional effects can result from chlorine exposure. Chlorine exposure may be harmful to workers.

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Rough ER is connected to the nuclear membrane and is responsible for the synthesis and processing of proteins.

The rough endoplasmic reticulum (ER) is a network of membrane-bound sacs and tubules that is studded with ribosomes on its surface. These ribosomes are responsible for protein synthesis. The rough ER is connected to the nuclear membrane because it receives instructions for protein synthesis from the DNA in the nucleus. This connection allows for the efficient transfer of genetic information from the nucleus to the rough ER.

Once the ribosomes on the rough ER synthesize proteins, the rough ER is also involved in the processing and modification of these proteins. It helps in folding the newly synthesized proteins into their functional three-dimensional shapes and also adds various modifications such as glycosylation (the addition of sugar molecules) or signal sequences that target the proteins to specific locations within or outside the cell.

After processing, the proteins may be transported to other parts of the cell or exported to the cell membrane or extracellular space. The connection between the rough ER and the nuclear membrane ensures a coordinated flow of genetic information and protein synthesis, allowing the cell to efficiently carry out its functions.

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Answer:

1. Balanced Molecular equation

Ca(OH)2(aq) + 2HCl(aq) —> CaCl2(aq) + 2H2O(aq)

2. Net ionic equation

OH-(aq) + H+(aq) —> H2O(l)

Explanation:

1. Molecular balance equation for the reaction between Ca(OH)2(aq) and HCl(aq).

This is illustrated below:

Ca(OH)2(aq) + HCl(aq) —> CaCl2(aq) + H2O(aq)

There are 2 atoms of Cl on the right side and 1 atom on the left side. It can be balance by putting 2 in front of HCl as shown below:

Ca(OH)2(aq) + 2HCl(aq) —> CaCl2(aq) + H2O(aq)

There are 2 atoms of H on the right side and a total of 4 atoms on the left side. It can be balance by putting 2 in front of H2O as shown below:

Ca(OH)2(aq) + 2HCl(aq) —> CaCl2(aq) + 2H2O(aq)

Therefore the equation above is balanced.

2. Net ionic equation for the reaction between Ca(OH)2(aq) and HCl(aq).

In solution, Ca(OH)2(aq) and HCl(aq) will dissociate as follow:

Ca(OH)2(aq) —> Ca2+(aq) + 2OH-(aq)

HCl(aq) —> H+(aq) + Cl-(aq)

Ca(OH)2(aq) + 2HCl(aq) —>

Ca2+(aq) + 2OH-(aq) + 2H+(aq) + 2Cl-(aq) —> Ca2+(aq) + 2Cl-(aq) + 2H2O(l)

Cancel out the spectator ions i.e Ca2+ and Cl- to obtain the net ionic equation

2OH-(aq) + 2H+(aq) —> 2H2O(l)

OH-(aq) + H+(aq) —> H2O(l)

Answer:

.2mol/L

Explanation:

Answer:

2mol/l

Explanation: