A Boron atom has 5 protons, 6 neutrons, 2 electrons, and a mass of 11. Select 2 that apply.

a
+ 2 charge
b
+ 3 charge
c
electrons were lost
d
electrons were gained
e
zero charge

The necessary equation to determine the density of the block is "d = 25 g / 8.4 cm".

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The provided metal block will have a density of 3.57 g/cm².

A material's specific gravity can be used to comprehend density in terms that are more relatable by measuring a substance's mass per volume. The ratio of a material's density to that of water is known as specific gravity. It is a relative (unitless) way to express how much something weighs.

Because their atoms are tightly packed together in a tiny area, metals have a high density. Metallic bonding is mostly to blame for this. Strong electrostatic attraction between metal cations and delocalized electrons is known as metallic bonding. As a result, the crystalline lattice structure is arranged in a predictable way.

Volume of the given block = 1.00 x 4.00 x 1.40

⇒ Volume = 5.6 cm³

Density = mass/volume

⇒ Density = 20/5.6 = 3.57 g/cm²

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Answer:

343

Explanation:

Answer:

those things that looks like cristals

When alkene molecule undergoes hydration there is formation of alcohol takes place. In this reaction pi bond is break through single bond.

Addition of water molecule is called as hydration. Water is added to an alkene during an acid-catalyzed hydration reaction to create alcohol.

A sequential mechanism for the reaction begins with the protonation of the double bond. Since water is a weak acid on its own, protonating the double bond requires the presence of an acid.

Hydration is the process of adding water to alkenes on a net basis. The pi bond in the alkene is broken, the OH bond in the water is broken, and a C-H bond and a C-OH bond are formed as a consequence.

Thus, When alkene molecule undergoes hydration there is formation of alcohol takes place. In this reaction pi bond is break through single bond.

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Answer:

0.0593237097

Explanation:

The electronegativity differences for the given bonds are 1. Si-C: 0.7, 2. P-C: 0.4, 3. S-O: 1.0, and 4. C-O: 1.0.

To calculate the electronegativity difference for each of the given bonds, we need to subtract the electronegativity of the bonded atoms. Using the values in Figure 12.9 of the textbook, the electronegativity values for the elements are as follows:

1. Si-C:

The electronegativity of Si is 1.8, and the electronegativity of C is 2.5.

Electronegativity difference = Electronegativity of C - Electronegativity of Si = 2.5 - 1.8 = 0.7.

2. P-C:

The electronegativity of P is 2.1, and the electronegativity of C is 2.5.

Electronegativity difference = Electronegativity of C - Electronegativity of P = 2.5 - 2.1 = 0.4.

3. S-O:

The electronegativity of S is 2.5, and the electronegativity of O is 3.5.

Electronegativity difference = Electronegativity of O - Electronegativity of S = 3.5 - 2.5 = 1.0.

4. C-O:

The electronegativity of C is 2.5, and the electronegativity of O is 3.5.

Electronegativity difference = Electronegativity of O - Electronegativity of C = 3.5 - 2.5 = 1.0.

Therefore, the electronegativity differences for the given bonds are:

1. Si-C: 0.7

2. P-C: 0.4

3. S-O: 1.0

4. C-O: 1.0.

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Answer:

Different compounds can have the same empirical formula. For example, ethylene C 2 H 4 and propylene C 3 H 6 have the same empirical formula, CH 2. In the same manner, compounds can have the same molecular formula. For example, ethanol and dimethyl ether have the same molecular formula, C 2 H 6.

Explanation:

Answer:

Dead bodies lose one degree Celsius per hour, which we could deduce that the person died 12 hours ago.

Explanation:

On the other hand, it is very important to take into account that this number of hours is very approximate, since not only does it vary greatly with the environment and the acclimatization of the environment in which the person dies, but also in this specific case, insulating clothing was presented , which made the loss of body heat much more difficult and could easily be more than 12 hours.

The minimum for this particular situation is 12 hours to 24 hours possible postmortem.

When cooking an egg and waiting for coagulation, two things to look for are the firmness of the egg white and the doneness of the yolk.

The egg white should become opaque and set, indicating that it has coagulated properly. The yolk can be cooked to different degrees of doneness, depending on personal preference. For a runny yolk, it should still be soft and slightly jiggly in the center. For a firmer yolk, it should be more set and less jiggly. By observing these two aspects, you can determine the coagulation stage of the egg and achieve the desired texture for your egg dish.

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A dipeptide can be broken into two amino acids by hydrolysis, not by dehydration synthesis. Hydrolysis is the reverse of the dehydration synthesis process. In hydrolysis, water is used to break down a molecule into smaller subunits.

In dehydration synthesis, water is released as a byproduct when two molecules are combined to form a larger molecule. Dipeptides are molecules made up of two amino acids. They can be broken down into individual amino acids through the process of hydrolysis. In hydrolysis, a molecule of water is added to the dipeptide, breaking the bond between the two amino acids and creating two separate amino acids. The opposite process, dehydration synthesis, involves combining two amino acids to form a dipeptide.

During dehydration synthesis, a molecule of water is removed from the amino acids to form a peptide bond between them. This process is used to form larger polypeptides and proteins by combining multiple amino acids in a specific sequence to create a functional protein.

In conclusion, a dipeptide can be broken down into two amino acids through hydrolysis, not dehydration synthesis. Hydrolysis involves the addition of water to break apart a molecule, while dehydration synthesis involves the removal of water to create a larger molecule. Both processes are important for the formation and breakdown of proteins and other biological molecules.

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Answer:

B   proofread the message.

Explanation: Hope this helped

The balanced equations of the reaction are given below:

Overall equation: 2 H_O → H₂O₂ (l)

Equation 1: H_O ---> H_O (g)

Equation 2: H_O (g) → H₂O₂ (g)

Equation 3: H₂O₂ (g) → H₂O₂ (l)

A balanced equation is an equation of a chemical reaction in which the number of moles of atoms for all the elements in the reaction is equal on both sides of the reaction.

A balanced chemical equation is obtained from the law of conservation of matter that states matter can not be created or destroyed.

Balancing chemical equations involves the addition of numerical coefficients to the reactants and products.

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We are given:

Volume of gas = 3.8 L

Pressure = 460 mmHg

Temperature = 77°c = (77+273)K = 350K

Converting the pressure to atm:

Pressure(in atm)  = Pressure(in mmHg) / 760

Pressure = 460/760 = 0.6 atm

Finding the number of moles:

using the ideal gas equation:

PV = nRT                                         [where R is the universal gas constant]

replacing the given values in this equation

(0.6)(3.8) = n(0.082)(350)

n = (0.6*3.8)/(0.082*350)

n = 0.08 moles

Raoult's law is not likely to hold true for solutions of acetone and chloroform due to the hydrogen bonding between the two components, which leads to non-ideal solution behavior.

- Raoult's law states that the vapor pressure of a component in an ideal solution is proportional to its mole fraction in the solution. However, in the case of acetone and chloroform, the presence of hydrogen bonding between the two liquids can affect the extent to which Raoult's law holds true.

- The hydrogen bonding between chloroform and acetone would decrease the vapor pressure of each component in the solution, as hydrogen bonding increases the attraction between the molecules and makes it harder for them to escape into the gas phase. As a result, the vapor pressure of the solution would be lower than what would be expected from Raoult's law.

- Therefore, Raoult's law is not likely to hold true for solutions of acetone and chloroform due to the presence of hydrogen bonding. Instead, the solution would exhibit non-ideal behavior and the vapor pressure would be lower than expected.

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Answer:70%

Explanation:

Answer:

71%

Explanation:

71% of the earth is covered by water and oceans hold about 96 percent of the water

Yes, that is correct. A used chemical container should never be refilled because used chemicals may be contaminated, which could cause an unexpected reaction or even a hazardous situation.

Additionally, used containers may have residue from the previous chemical that could react with the new chemical being added, leading to unexpected and potentially dangerous results. It is always recommended to use a clean and properly labeled container for each chemical to ensure safe storage and use.

A chemical container is a device used to store and transport chemicals and other hazardous materials. It is usually made of materials such as plastic, metal, or glass that are resistant to corrosion and chemical reactions with the contents. Chemical containers are designed to be leak-proof and safe to handle, and are often labeled with warnings and safety information to ensure proper use and handling.

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Answer:

Explanation:

The density of a substance can be found by using the formula

\(density = \frac{mass}{volume} \\ \)

From the question we have

\(density = \frac{15}{14} \\ =1.0714285 ...\)

We have the final answer as

Hope this helps you

The most likely true statement about a restriction enzyme recognizing the sequence 5ʹ-gtcatgac-3ʹ and making staggered cuts is: "The restriction enzyme produces fragments with sticky ends".

When a restriction enzyme recognizes a specific DNA sequence, it cuts the DNA at or near that sequence. Staggered cuts refer to cuts made at different positions on the two DNA strands, resulting in fragments with overhanging ends. These overhanging ends are often referred to as sticky ends because they can base pair with complementary sequences.

In the given sequence 5ʹ-gtcatgac-3ʹ, the restriction enzyme would recognize and cut between the G and the T bases, resulting in staggered cuts. This would produce fragments with complementary overhangs: 5ʹ-GTCATG-3ʹ and 5ʹ-GTCA-3ʹ. These overhanging ends can then bind or anneal with complementary sequences during DNA manipulation, such as in cloning or DNA ligation reactions.

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Answer:

FREE POINTS CUZ I DON'T UNDERSTAND

Explanation:

Among the given complexes, [Co(NH3)5NO2]Cl2 will not show geometrical isomerism. This is because it has an octahedral geometry with five ammine (NH3) ligands and one nitro (NO2) ligand, resulting in no possibility of cis-trans isomerism. The other complexes can exhibit geometrical isomerism due to the presence of different ligands.

The complex compounds that show geometrical isomerism have a different spatial arrangement of ligands around the central metal atom due to the presence of a chiral center. In the given options, only [Pt(NH3)2Cl2] will not show geometrical isomerism as it has only two types of ligands, and the arrangement of these ligands around the central metal atom is symmetrical. On the other hand, [Cr(NH3)4Cl2]Cl, [Co(en)2Cl2]Cl, and [Co(NH3)5NO2]Cl2 all have chiral centers and can exhibit geometrical isomerism.
Your answer: c. [Co(NH3)5NO2]Cl2
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Nowadays, it is very important to reduce one's carbon "footprint" (how much carbon we produce in our daily lifestyles). By limiting the use of fossil fuels and instead turning to renewable sources of energy, we can significantly reduce our carbon emissions and mitigate the impacts of climate change.

One way to reduce our carbon footprint is by transitioning to renewable energy sources such as solar, wind, and hydropower. These sources of energy produce minimal greenhouse gas emissions compared to fossil fuels like coal, oil, and natural gas. Installing solar panels on rooftops, utilizing wind turbines, and supporting hydroelectric power can help generate clean and sustainable energy.

Another important aspect is adopting energy-efficient practices and technologies. This includes using energy-efficient appliances, LED lighting, and improving insulation in buildings to reduce energy consumption. Conserving energy in transportation by opting for public transportation, carpooling, biking, or walking can also make a significant difference.

Additionally, reducing waste and promoting recycling and composting can help minimize greenhouse gas emissions. Waste decomposition in landfills produces methane, a potent greenhouse gas. By reducing, reusing, and recycling materials, we can lower our carbon emissions and conserve resources.

Furthermore, making conscious choices in our daily lives can contribute to reducing our carbon footprint. This includes minimizing water usage, eating a plant-based diet or reducing meat consumption, and supporting sustainable and local products.

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When heating under reflux, you will need the following glassware equipment to set up the apparatus: Round bottom flask, condenser, hot plate, thermometer, adapter, clamps and stands, water supply.

When heating under reflux, you will need the following glassware equipment to set up the apparatus:

1. Round-bottom flask: This is the flask that contains the reaction mixture that needs to be heated.

2. Condenser: This is a glass tube that is attached to the round-bottom flask and has a water jacket around it. The water is circulated through the jacket to cool down the hot vapours and condense them back into liquid form.

3. Heating mantle or hot plate: This is the equipment that provides heat to the round-bottom flask.

4. Thermometer: This is an instrument used to measure the temperature of the reaction mixture.

5. Adapter: This is a glassware piece that connects the condenser to the round-bottom flask.

6. Clamps and stands: These are used to hold the glassware in place during the heating process.

7. Water supply: This is required to run water through the condenser's jacket to cool down the vapours.

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The decomposition of hydrogen peroxide into water and oxygen is a slow process, but it can be catalyzed by iodide ion. The iodide ion acts as a catalyst by lowering the activation energy required for the reaction to occur.

During the reaction, the iodide ion is oxidized to form iodine, which then reacts with hydrogen peroxide to form water and oxygen. The iodine can then react with more hydrogen peroxide to continue the reaction.

The concentration of the catalyst, iodide ion, affects the rate of the reaction. An increase in the concentration of the iodide ion will increase the rate of the reaction, as there will be more catalyst available to facilitate the reaction. Conversely, a decrease in the concentration of the iodide ion will slow down the rate of the reaction.

However, once the reaction has finished, the concentration of the catalyst will remain the same. This is because the catalyst is not consumed in the reaction and can be used again in subsequent reactions. Therefore, the concentration of the catalyst will remain constant as long as there is enough iodide ion present to catalyze the reaction.

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To solve this problem, we can use the gas law equation, which states that PV = nRT, where P is pressure, V is volume, n is the number of moles of gas, R is the universal gas constant, and T is temperature.

Since we are told that the temperature remains constant, we can simplify the equation to P1V1 = P2V2, where P1 is the initial pressure, V1 is the initial volume, P2 is the new pressure, and V2 is the new volume.
Plugging in the given values, we get:
P1 = 862 kPa
V1 = 752 c * m^3
V2 = 624 c * m^3
Solving for P2, we get:
P2 = (P1 * V1) / V2
P2 = (862 kPa * 752 c * m^3) / 624 c * m^3
P2 = 1040 kPa
Therefore, the new pressure under a volume of 624c * m^3 is 1040 kPa.

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True. The regulation of the glomerular filtration rate is achieved through autoregulation. True. The renal autoregulation mechanism involves smooth muscles in the arterioles acting as stretch receptors, thus dilating or constricting the arteriole in response to changes in blood pressure.

True. The renal autoregulation involves macula denser cells sending signals to the juxtaglomerular cells to either constrict or dilate the arteriole. False. The tubuloglomerular feedback mechanism involves the macula denser cells detecting changes in the NaCl concentration in the filtrate and sending signals to the afferent arteriole to either constrict or dilate. True. The tubuloglomerular mechanism involves macula denser cells sending signals to the juxtaglomerular cells to either constrict or dilate the arteriole. Overall, the regulation of the glomerular filtration rate involves both autoregulation and tubuloglomerular feedback mechanisms. Autoregulation helps maintain a relatively constant glomerular filtration rate despite changes in systemic blood pressure, while tubuloglomerular feedback helps adjust the glomerular filtration rate in response to changes in the filtrate composition.

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