7. Which is not a sedimentary rock?
A basalt

B
calcite
С
gypsum
D
halite

Answer:

the pH of the acid is the property that determines whether an acid is a strong acid or a weak acid

In order to provide evidence to support the inference that a reaction is exothermic, one would need to measure the temperature change of the system. If the temperature of the system increases during the reaction, it is likely that the reaction is exothermic.

Conversely, if the temperature decreases during the reaction, the reaction is likely endothermic. This is because an exothermic reaction releases energy in the form of heat, causing the temperature of the system to increase, while an endothermic reaction absorbs energy from the surroundings, causing the temperature of the system to decrease.

Therefore, to determine if a reaction is exothermic, one should measure the temperature change of the system during the reaction. The methods that would provide evidence to support this inference are adding A and C or subtracting E from D, as both of these options involve measuring the temperature change of the system.

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The CMS-1500 form is used for billing Medicare and other insurance providers for medical services provided to patients. The color of ink used to complete the form is not specified in the CMS-1500 instructions.

It's worth noting that the CMS-1500 form is updated periodically, and the instructions may vary depending on the version of the form that you are using. It's always a good idea to check the most up-to-date version of the form and instructions to ensure that you are completing the form correctly.

However, the form should be completed in black or dark blue ink to ensure that all information is easily readable and can be processed efficiently. If you have any other questions or concerns about completing the CMS-1500 form, you may want to contact the billing department at your healthcare provider or reach out to Medicare or your insurance provider for further guidance.  

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It is hypothesized that as the temperature of the air inside the plastic bottle decreases, the volume of the air will decrease as well, in accordance with Charles's Law and the contraction of the plastic bottle.

Hypothesis:

Based on the ideal gas law and the behavior of gases, it is hypothesized that when the temperature of the air inside a plastic bottle is decreased, the volume of the air will decrease as well. This hypothesis is rooted in the understanding that gases tend to contract and occupy less space when their temperature decreases.

According to Charles's Law, which states that the volume of a gas is directly proportional to its temperature when pressure is held constant, it is expected that as the temperature of the air in the plastic bottle decreases, the gas molecules will lose kinetic energy, resulting in a decrease in their average speed. This decrease in speed will lead to a decrease in collisions between the gas molecules and the walls of the container, causing the air to occupy less volume.

Furthermore, since the air is trapped inside a plastic bottle, the decrease in temperature is expected to cause the plastic to contract slightly, exerting additional external pressure on the gas molecules and further reducing the volume they occupy.

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The  repeat  unit  molecular  weight  of polypropylene is 42.08 g/mol . For polypropylene, each repeat unit has three carbons and six hydrogens.  

Thus, m= 3(AC) + 6(AH)

             = (3)(12.01 g/mol) + (6)(1.008 g/mol)

             = 42.08 g/mol

Now computation of the  number-average molecular  weight.  

Since  the  degree  of polymerization (DP) is 25,000,

number-average molecular weight = (DP)m

                                                          = (25,000)(42.08 g/mol)

                                                          = 1,052,000 g/m

It is a  thermoplastic polymer made from propylene units.

Polymerization is the process of forming long chainlike compounds reacting monomer molecules together in a chemical reaction.

It is the sum total of weight of all the atoms present in a substance.

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The number of moles of H2SO4 leftover is 0.012 moles.

To determine the moles of H2SO4 leftover, we need to consider the stoichiometry of the balanced chemical equation between H2SO4 and Al. The balanced equation is as follows:

H2SO4 + 2Al -> Al2(SO4)³+ H2

From the equation, we can see that 1 mole of H2SO4 reacts with 2 moles of Al. Therefore, for every 1 mole of Al, we would need 0.5 moles of H2SO4.

Given that we started with 0.045 moles of H2SO4 and 0.0061 moles of Al, we can determine the limiting reactant.

In this case, Al is the limiting reactant because we have less of it compared to H2SO4. So, all the Al will react, and the amount of H2SO4 needed to react with the Al is 0.0061 moles.

To find the moles of H2SO4 leftover, we subtract the moles of H2SO4 that reacted from the initial moles of H2SO4. Therefore, 0.045 moles - 0.0061 moles = 0.0389 moles.

However, we need to consider the stoichiometry. Since 1 mole of Al requires 0.5 moles of H2SO4, we multiply the moles of Al (0.0061) by 0.5 to find the moles of H2SO4 that reacted with the Al. Therefore, 0.0061 moles * 0.5 = 0.00305 moles.

Finally, we subtract the moles of H2SO4 that reacted with the Al from the initial moles of H2SO4 to find the moles of H2SO4 leftover: 0.045 moles - 0.00305 moles = 0.04195 moles, which we can round to 0.042 moles or 0.012 moles (to three significant figures).

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The initial kinetic energy is zero because the girl was at rest. The final kinetic energy is thus, 3100 J. Therefore, the change in kinetic energy is 3100 J

Kinetic energy of an object is generated by virtue of its motion. It is related to the mass and velocity of the object as follows:

Ke = 1/2 mv²

Given that, mass of girl = 50 kg

mass of bicycle = 12 kg.

total mass = 62 kg.

velocity = 10 m/s.

Then initial kinetic energy  = 0 since v = 0.

Then, ΔKe = 1/2 62 kg × (10 m/s)² - 0 = 3100 J

Therefore, the change in kinetic energy of the girl is 3100 J.

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To determine the molar concentration of each ion present in the solutions, we need to calculate the total moles of each ion and divide it by the total volume of the resulting solution.

(a) Mixture: 54.1 mL of 0.33 M NaCl and 76.0 mL of 1.33 M NaCl

For NaCl, the number of moles (n) can be calculated using the formula:

n = M * V

n(NaCl) = 0.33 M * 54.1 mL + 1.33 M * 76.0 mL

Next, we need to determine the concentration of each ion. Since NaCl dissociates into Na+ and Cl- ions in solution, the molar concentration of each ion is the same as that of NaCl.

M(Na+) = M(Cl-) = n(NaCl) / (V1 + V2)

Where V1 and V2 are the volumes of the solutions used.

M(Na+) = M(Cl-) = n(NaCl) / (54.1 mL + 76.0 mL)

(b) Mixture: 134 mL of 0.66 M HCl and 134 mL of 0.17 M HCl

Similarly, we calculate the moles of HCl:

n(HCl) = 0.66 M * 134 mL + 0.17 M * 134 mL

The concentration of each ion is the same as that of HCl:

M(H+) = M(Cl-) = n(HCl) / (V1 + V2)

Where V1 and V2 are the volumes of the solutions used.

M(H+) = M(Cl-) = n(HCl) / (134 mL + 134 mL)

(c) Mixture: 36.3 mL of 0.340 M Ba(NO3)2 and 25.5 mL of 0.211 M AgNO3

For Ba(NO3)2, we calculate the moles:

n(Ba(NO3)2) = 0.340 M * 36.3 mL

For AgNO3, we calculate the moles:

n(AgNO3) = 0.211 M * 25.5 mL

The concentration of each ion is determined as follows:

M(Ba2+) = n(Ba(NO3)2) / (V1 + V2)

M(Ag+) = n(AgNO3) / (V1 + V2)

M(NO3-) = 2 * M(Ba2+) + M(Ag+)

Where V1 and V2 are the volumes of the solutions used.

M(Ba2+) = n(Ba(NO3)2) / (36.3 mL + 25.5 mL)

M(Ag+) = n(AgNO3) / (36.3 mL + 25.5 mL)

M(NO3-) = 2 * M(Ba2+) + M(Ag+)

(d) Mixture: 13.6 mL of 0.650 M NaCl and 22.0 mL of 0.131 M Ca(C2H3O2)2

For NaCl, we calculate the moles:

n(NaCl) = 0.650 M * 13.6 mL

For Ca(C2H3O2)2, we calculate the moles:

n(Ca(C2H3O2)2) = 0.131 M * 22.0 mL

The concentration of each ion is determined as follows:

M(Na+) = n(NaCl) / (V1 + V2)

M(Cl-) = n(NaCl)

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Answer:

300.06 grams of glucose can be produced from a photosynthesis reaction that occurs using 10 moles of carbon dioxide.

Explanation:

Based on the observation that the particles of an unknown substance slide past one another, the state of matter of the substance can be determined as a liquid.(option b)

In a liquid state, the particles are closely packed together but still have the ability to move past each other. This allows the substance to flow and take the shape of its container. Liquids have definite volume, meaning they maintain a constant amount of substance, but they do not have a definite shape.

For example, think of pouring water from one container to another. The water molecules can easily slide past each other, allowing the water to flow. This behavior is characteristic of liquids.

In contrast, in a solid state, particles are tightly packed together and do not move freely. In a gas state, particles are far apart and move rapidly in all directions. Plasma, on the other hand, consists of charged particles and is not commonly found in everyday substances.

Therefore, based on the observation of particles sliding past one another, the substance can be identified as a liquid (option b is correct).

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Answer:

Increase in height from the ground.

Explanation:

Potential energy =mass×acceleration due to gravity×height.

P.E= mgh

Prediction 1 best shows what the population could look like after many generations. Because, the long beak traits is having more life time.

Each characteristics in a living thing is created by a respective genetic coding in its body. The genetic code which is responsible for a particular behavior or appearance is called a genetic trait.

Here, the prediction 1 is best . It already saying that long-beak hummingbirds are more likely to survive, that baby survived long enough to pass on its mutation, so the long-beak trait became more common over generations.

Prediction 2 says abut a  genetic trait which is less fit to survive. Hence, cannot affect the next generation population. Therefore, prediction 1 is best.

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Your question is incomplete. But your complete question probably was:

Prediction 1 :Two hummingbirds with short or medium beaks had a baby with a mutation in its genes for the long-beak trait.

Prediction 2 is best. A hummingbird could have been born with a mutation in its genes for the long-beak trait and lived for a little while.

Answer:

Option D

Explanation:

Molarity (M) of any solution is equal to the number of moles (n)of solute in it divided by total volume of solution (V)

Mathematically, it can be represented as

\(M = \frac{n}{V}\)

Substituting the given values, we get-

\(M = \frac{10}{5} = 2\)

Hence, option D is correct

Answer:

125280

Explanation:

86400 seconds are in a day so just multiply 86400 by 1.45 to get your answer

After 20 days, there will be approximately 2.5 grams of the substance left.

The half-life of a radioactive substance is the time it takes for half of the initial quantity of the substance to decay. In this case, the half-life is given as 10 days.

Since the half-life is 10 days, after 10 days, half of the initial quantity will remain. Therefore, after 20 days, two half-lives will have passed, and we can calculate the amount of substance left as follows:

After 10 days: 10 grams / 2 = 5 grams remaining

After another 10 days: 5 grams / 2 = 2.5 grams remaining

Therefore, after 20 days, there will be approximately 2.5 grams of the substance left.

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Answer:

quartz (SiO2)n

Explanation:

Melting point is defined as the temperature or point at which the substances change its state from solid to liquid.

Quartz (SiO2)n has high melting point than O2 because Quartz (SiO2)n is found in the form of hard, crystalline mineral that is made up of silicon and oxygen atoms having strong covalent bonds between all the atoms. So, a lot of energy is required to break the bond between the atoms and it has a high melting point.

Hence, the correct answer is quartz (SiO2)n.

The inflammatory response starts to work when tissue is harmed. Before using water for cooking or drinking, consumers are advised by radio announcement to boil it.

Pain, swelling, heat, and redness (Latin: rubor, calor, and tumor) are the four primary indicators of inflammation (dolor).

When tissues are harmed, the immune system is activated and the inflammatory response begins. The innate immune system's immune cells, or neutrophils and eosinophils, are drawn to the site of tissue damage or injury via blood arteries and the lymphatic system before macrophages.

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Answer:

True

Explanation:

I took the test

During chemistry class, carl performed several lab tests on two white solids. The results of three tests are seen in the data table. Based on this data, carl has concluded that substance b must have ionic bonds.

The complete transfer of certain electrons from one atom to another results in the formation of an ionic connection. A negatively charged ion known as a cation results from an atom losing one or more electrons. An anion, or negatively charged ion, is created when an atom gains one or more electrons.

If the electronegativity of the two atoms differs by enough to allow one to totally draw an electron away from the other, the connection is ionic. Compounds that mix elements from the left-hand side of the periodic table frequently encounter such circumstance (sodium, potassium, calcium, etc.)

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More than one kind of pure form of matter combines forming a mixture.

A mixture is a combination of two or more pure substances that have been mixed physically and not chemically. The mixture can be homogeneous or heterogeneous depending on how well the substances are distributed in the mixture. Homogeneous mixture has the same composition and appearance throughout, while heterogeneous mixture has different composition and appearance. An example of a homogeneous mixture is saltwater, and an example of a heterogeneous mixture is soil.The components of a mixture can be separated by physical methods, which means that the components retain their properties. These physical methods include filtration, distillation, chromatography, and others. For instance, saltwater can be separated through evaporation by heating the mixture to evaporate the water, leaving behind the salt. Chromatography is another physical method that separates components of a mixture based on their chemical properties. It is used to separate dyes in ink or pigments in paint.In conclusion, more than one kind of pure form of matter combines forming a mixture. The mixture can be homogeneous or heterogeneous, and its components can be separated by physical methods.

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Accelerate the hydrologic cycle while decreasing the ocean's thermohaline circulation. (Choice b)

A hydrologic disaster is an incident that results in a major loss of life, material, and environmental harm that is brought on by changes to the hydrologic cycle. A shift in a watershed's typical hydrology due to natural or artificial factors is referred to as an adjustment of the hydrologic cycle.

Watershed hydrology has a significant impact on the long-term viability of local ecosystems and the availability of water. Land use change & rising temperatures are two of these causes.

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Answer:

Criminal justice and forensic science are two degrees often pursued by those with a sincere interest in and passion for the criminal justice system. Indeed, a degree in either of these fields can eventually lead to a career in law enforcement in a number of capacities, including crime scene analysis, crime scene investigation, or as a forensic science technician.

Beyond this, however, is where the two areas of study begin to differ. While the study of criminal justice focuses on crime, it hones in on the causes of the crime, any responses by law enforcement agencies, and prevention methods to consider and employ in the future. As such, a student pursuing a degree in criminal justice can expect to take courses on law and legal theory, law enforcement philosophies and theories, sociology and criminal behavior, and others related to criminology. A developed understanding of concepts within each of these subfields can help a student of criminal justice apply this to real-world situations, and perhaps even obtain future employment as a police officer or detective, an FBI agent, an immigration officer, or any other member of a law enforcement agency.

In contrast to this, those studying forensic science will also examine crime, yet from an entirely different perspective. This field of study focuses on the application of science and scientific methods to understand all aspects of a crime, including the perpetrator and the causes. Those studying forensic science are certain to take courses in physical sciences, such as biology and chemistry, as well as others related to DNA and fingerprint analysis, crime scene procedure, and other types of forensic analysis. Because those working in the field of forensic science routinely interact with members of law enforcement, students will also likely take courses on forensic case reporting and investigation techniques. Although there is no one career path for a student of this field, possible future options include employment as a forensic pathologist, a toxicologist, an evidence technician, or even an intelligence analyst, depending on what level of education that student pursues.

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Explanation:

The notation for the enthalpy of the solution is ∆Hsol. The correct answer is option ∆Hsol.

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Answer:

Multiply the density by the volume

Since density is at g/mL you don't need to convert volume into L and just multiply it as mL

7.86g/mL x 6.5mL = 51.09g

Therefore the mass of the substance is 51.09g

There is a golden role of solubility, polar solute dissolve in polar solvent and non polar solute dissolve in non polar solvent. Therefore, it was unable to diffuse through the 20 MWCO membrane.

Solutions are a homogeneous mixture of two or more substances. A solution is a homogeneous mixture of solvent and solute molecules. Solvent is a substance that is in large amount in solution. solute is the substance which is in small amount in a solution. There are two types of mixture that is homogeneous and heterogeneous. Solution is a homogeneous solution.

Lee molecular weight of urea is 60.07 . It was unable to diffuse through the 20 MWCO membrane due to urea being unable to fit through the pores of the membrane.

Therefore, it was unable to diffuse through the 20 MWCO membrane.

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Mass of NaCl : 5.85 g

Given

5.3 g Sodium carbonate (Na₂CO₃)

Required

Mass of NaCl

Solution

Reaction

Na₂CO₃ + 2HCl ⇒ 2NaCl + H₂O + CO₂

mol of Na₂CO₃ (MW=106 g/mol) :

= mass : MW

= 5.3 g : 106 g/mol

= 0.05

From the equation, mol ratio Na₂CO₃ : NaCl = 1 : 2, so mol NaCl :

= 2/1 x mol Na₂CO₃

= 2/1 x 0.05

= 0.1

Mass of NaCl (MW=58.5 g/mol) :

= mol x MW

= 0.1 x 58.5

= 5.85 g

Answer:

Lithosphere plate boundaries are found in that area.

Explanation:

Answer:

C is the right answer

Explanation:

The number of moles of NaClO that were added to the water are calculated to be 6.23 × \(10^{-11}\) mol.

In this case, we know that the pH of the solution is 10.50. Using the formula of pH, we can find the concentration of hydrogen ions.

The pH of a solution can be calculated using the following formula:

pH = -log[\(H^+\)]

where [\(H^+\)] is the concentration of hydrogen ions in the solution.

Plugging in the values.

10.50 = -log[\(H^+\)]

\([H^+]=10^{10.50}\)

\([H^+] =3.162 \times 10^{-11} mol/L\)

Now, let us find concentration of NaClO.

Since sodium hypochlorite is a salt, it dissociates in water to form ions.

The balanced equation for the dissociation of sodium hypochlorite is:

NaClO(s) → \(Na^+(aq) + ClO^-(aq)\)

The concentration of sodium hypochlorite can be calculated from the concentration of hypochlorite ions using the stoichiometry of the reaction.

Since there is a 1:1 ratio between NaClO and , the concentration of NaClO is also \(3.162 \times 10^{-11} mol/L\).

To find the number of moles of NaClO added to the solution, we need to multiply the concentration by the volume:

moles NaClO = concentration x volume

moles NaClO = \(3.162 \times 10^{-11} mol/L \times 2L\)

moles NaClO = 6.23 × \(10^{-11}\) mol.

Therefore, the number of moles of NaClO that were added to the water is 6.23 × \(10^{-11}\) mol..

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