Dsm-5 includes gambling disorder as an addictive disorder, along with substance use disorders. this change is considered important because it:_________

The formula for the relationship between weight and blood pressure in children is:

We differentiate the above function with respect to x Therefore:

Rate of change at the 70-pound weight level:

Blood is a fluid found in all living things that functions to deliver substances and oxygen needed by body tissues, transports chemical products of metabolism, and also acts as the body's defense against viruses or bacteria. Blood has the function of regulating acid and base balance. ,transports O2, carbohydrates, and metabolites, regulates body temperature by conduction or conduction, carries body heat from heat production centers (liver and muscles).

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The molality of the solution that is formed by dissolving 27. 8 g of lii in 500. 0 ml of water is 5.56 moles/kg.

Molality is defined as the number of moles of solute per kilogram of solvent. To calculate the molality of a solution, we first need to determine the number of moles of solute in the solution and then divide that number by the mass of the solvent. In this case, the solute is LiI (lithium iodide) and the solvent is water.

The number of moles of LiI can be calculated using its molar mass:

The mass of the water can be calculated using its density:

The molality of the solution is then calculated as follows:

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In general, if the change in temperature is proportional to the amount of copper(II) sulfate used, then increasing the amount of copper(II) sulfate used will lead to a corresponding increase in temperature change, and decreasing the amount of copper(II) sulfate used will result in a decrease in temperature change.

Temperature change in substances can be caused by a variety of factors, including the addition or removal of heat energy, changes in pressure, chemical reactions, and phase changes (such as melting, boiling, or freezing).

If this relationship does not hold, it could indicate that other factors are also at play, such as a limiting reagent or a change in reaction conditions. Therefore, comparing the results from parts A and B can help determine whether the change in temperature appears to be proportional to the amount of copper(II) sulfate used or not.

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The complete question is:

Copper(II) Sulfate and Zinc

The reaction between zinc (Zn) and copper sulfate (CuSO₄) is an oxidation-reduction reaction. Zinc reacts with copper sulfate to form zinc sulfate. So, zinc undergoes oxidation. At the same time, copper sulfate reduces to pure metallic copper and so undergoes reduction. Here is the equation for the reaction:

Zn + CuSO₄ → Cu + ZnSO₄.

In this task, you’ll carry out this oxidation-reduction reaction to ±nd the enthalpy of the reaction.

If you need a refresher on using a graduated cylinder and an electronic balance, watch the videos about measuring volume and measuring mass. Before you begin this task, review the lab safety guidelines.

Estimated time to complete: 1 hour

If you’ve purchased an Edmentum lab kit, remove the items that appear in the equipment list. The chemicals are located inside a box within the kit. You’ll also need distilled or tap water and a pen or a fine-tip marker for labeling test tubes.

You’ll need these materials:

Compare the results from parts A and B. Does the change in temperature appear to be proportional to the amount of copper(II) sulfate used? (edmentum lab)

The molecular formula of the unknown compound is C2H2O2.

To determine the molecular formula of the unknown compound, we need to calculate the empirical formula first and then find the multiple of its subscripts to obtain the molecular formula.

Given:

Percentage of carbon = 40.0%

Percentage of hydrogen = 6.7%

Percentage of oxygen = 53.3%

Molecular mass = 60.0 g/mol

Step 1: Convert the percentages to grams.

Assuming we have 100 grams of the compound:

Mass of carbon = 40.0 g

Mass of hydrogen = 6.7 g

Mass of oxygen = 53.3 g

Step 2: Convert the masses to moles using the molar masses of the elements.

Molar mass of carbon = 12.01 g/mol

Molar mass of hydrogen = 1.008 g/mol

Molar mass of oxygen = 16.00 g/mol

Number of moles of carbon = Mass of carbon / Molar mass of carbon

= 40.0 g / 12.01 g/mol

= 3.332 mol

Number of moles of hydrogen = Mass of hydrogen / Molar mass of hydrogen

= 6.7 g / 1.008 g/mol

= 6.648 mol

Number of moles of oxygen = Mass of oxygen / Molar mass of oxygen

= 53.3 g / 16.00 g/mol

= 3.331 mol

Step 3: Determine the empirical formula by dividing the moles by the smallest value.

Dividing the moles of carbon, hydrogen, and oxygen by 3.331 gives approximately 1 for each element.

So, the empirical formula of the compound is CHO.

Step 4: Determine the multiple of the subscripts to obtain the molecular formula.

To find the multiple, we divide the molecular mass by the empirical formula mass.

Molecular mass = 60.0 g/mol

Empirical formula mass = (12.01 g/mol) + (1.008 g/mol) + (16.00 g/mol) = 29.018 g/mol

Multiple = Molecular mass / Empirical formula mass

= 60.0 g/mol / 29.018 g/mol

= 2.07

Rounding to the nearest whole number, we get 2.

Therefore, the molecular formula of the unknown compound is C2H2O2.

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Answer:

The key processes of the rock cycle are crystallization, erosion and sedimentation, and metamorphism.

Explanation:

mark me brainliest!!

Answer:

Earths heat and hydrological cycle

Explanation:

There is the formation of intermolecular hydrogen bonding in ethanol as shown in the model below.

Intermolecular interactions can arise when ethanol, a common alcohol, is liquid. These interactions result from the ethanol molecule's polarity and hydrogen bonding propensity.

Two carbon atoms, five hydrogen atoms, and one oxygen atom make up the compound ethanol (C2H5OH). Because the oxygen atom is more electronegative than the carbon and hydrogen atoms, they are bound together by a polar covalent bond.

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Answer:

= 100u. Hence 10 g = 0.1 mole. Hope it's helpful to u

The molarity of KMnO4 in the given solution is approximately 0.00126 M. Molarity is a measure of the concentration of a solute in a solution. It represents the number of moles of the solute present per liter of the solution.

To determine the molarity of KMnO4 in the given solution, we need to first calculate the number of moles of KMnO4 using its mass and molar mass, and then divide it by the volume of the solution.

The molar mass of KMnO4 can be calculated as follows:

(1 × atomic mass of potassium) + (1 × atomic mass of manganese) + (4 × atomic mass of oxygen)

= (1 × 39.10 g/mol) + (1 × 54.94 g/mol) + (4 × 16.00 g/mol)

= 39.10 g/mol + 54.94 g/mol + 64.00 g/mol

= 158.04 g/mol

Now, let's calculate the number of moles of KMnO4:

Number of moles = Mass / Molar mass

Number of moles = 0.0897 g / 158.04 g/mol

Number of moles ≈ 0.000567 mol

Next, we need to calculate the molarity using the number of moles and the volume of the solution:

Molarity (M) = Number of moles / Volume (in liters)

Molarity = 0.000567 mol / 0.450 L

Molarity ≈ 0.00126 M

In this case, the molarity tells us the concentration of KMnO4 in moles per liter.

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The two geologic events which occur very slowly as a result of tectonic forces and movement are convection in the mantle and plate subduction.

This is a term which is referred to as the process in which there is collision between two of Earth's tectonic plates, where one plate sinks into the mantle underneath the other plate.

This is caused by geologic events which occur very slowly as a result of tectonic forces while on the other hand, mountains and volcanoes occur abruptly which is therefore the reason why options A and C were chosen as the correct choice.

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Answer: A and C

Explanation:

Answer:

71.92 kPa

Explanation:

Using the combined gas law equation;

P1V1/T1 = P2V2/T2

Where;

P1 = initial pressure (kPa)

P2 = final pressure (kPa)

V1 = initial volume (L)

V2 = final volume (L)

T1 = initial temperature (K)

T2 = final temperature (K)

According to the information provided in this question;

T1 = 50°C = 50 + 273 = 323K

V1 = 105L

T2 = -25°C = -25 + 273 = 248K

P2 = 105.4 kPa

P1 = ?

V2 = 55.0 L

Using P1V1/T1 = P2V2/T2

P1 × 105/323 = 105.4 × 55/248

105P1/323 = 5797/248

0.325P1 = 23.375

P1 = 23.375 ÷ 0.325

P1 = 71.92 kPa

Answer:

520ML and apparently I need to put more in this answer

Explanation:

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The volume increases and the final volume is 2.1 L

The volume of a gas is directly related to the heat and pressure. If temperature increases, volume increases.

If pressure increases, volume decreases

Based on Boyle's law,

The absolute temperature of a gas is directly proportional to the volume of the gas.

As the balloon change increases its temperature, the volume increases

The Boyle's equation is:

V₁T₂ = V₂T₁

Where,

Replacing :

V₁ = 2.0L

T₂ = 35°C + 273.15 = 308.15K

V₂ = ?

T₁ = 25°C + 273.15 = 298.15 K

2.0L x 308.15 K = V₂ x 298.15 K

2.1 L = V₂

Final volume is 2.1L

Hence, The volume increases and the final volume is 2.1 L

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Answer:

increases, 2.1

Explanation:

I got it right.

The ketone that can be shown by the description have been shown in the image attached.

A strong analytical method known as mass spectrometry can reveal important details about the make-up, structure, and characteristics of molecules. It enables researchers to pinpoint and examine a sample's chemical and isotopic features.

The mass of a molecule or an ion can be precisely determined using mass spectrometry. The mass-to-charge ratio (m/z) measurement enables the recognition and verification of a compound's molecular formula. Particularly relevant to the study of pharmaceutical analysis, biochemistry, and organic chemistry.

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Answer:

1. 0.000045km

2. 307.15 Kelvin

3. 429.9014lb

7. 42.22222 celcius

8. 63200 mm

3. Use trifluoroacetic acid as a remedy 4. Use isothiocyanate to treat 5. Use dinitrofluorobenzene as a treatment 6. Take the amino acid that has been derivatized.

The first amino acid's uncharged alpha amino group combines with phenyl isothiocyanate to generate an intermediary molecule during the Edman degradation process. An identified amino acid is now present in this intermediate protein molecule. Edman's Reagent, commonly known as phenylisothiocyanate (PITC), permits the progressive breakdown of a polypeptide chain's amino acids chain to provide initial structural data.

Edman's methodology required first uppercut ting the protein, as was the case with Sanger's approach, however this was accomplished using a chemical reagent as opposed to acids and enzymes. He utilized a reagent called

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a) The absolute pressure at point B cannot be determined based on the given information.

b) The relative pressure at point F, with respect to the air in the tank, is also indeterminable with the provided information.

a) The absolute pressure at point B cannot be determined because the information about the liquid levels or the densities of the liquids in the tank is not provided.

The absolute pressure depends on the height of the liquid column and the density of the liquid, which are missing from the given data. Without this information, it is not possible to calculate the absolute pressure at point B.

b) The relative pressure at point F, with respect to the air in the tank, is also indeterminable. To calculate the relative pressure, we need to know the absolute pressure at point F and subtract the atmospheric pressure.

However, the absolute pressure at point F is not given, so we cannot determine the relative pressure. Additionally, the value of atmospheric pressure (Patm) provided is not relevant to calculating the relative pressure at point F.

In order to determine the absolute pressure at point B or the relative pressure at point F, we would need additional information such as the liquid levels in the tank, the densities of the liquids, and possibly the atmospheric pressure at point F.

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Based on the given measurements, we can conclude that they are neither sufficiently precise nor accurate in determining the density of water at 25°C. To obtain more reliable results, the measurements should be repeated multiple times, and the average value should be taken to minimize random errors and improve precision.

Based on the provided measurements, the density of water at 25°C is neither sufficiently precise nor accurate. In order to determine the density of water at a specific temperature, the measurements should be consistent and close to the known value. Let's analyze the given measurements:

1. Trial 1: Density = 5.01 g/mL
2. Trial 2: Density = 4.95 g/mL
3. Trial 3: Density = 5.10 g/mL

Comparing these measurements to the known value of 0.958 g/mL, it is clear that none of the measurements are close to the known value. Moreover, the measurements themselves are not consistent with each other, as they vary by more than 0.10 g/mL.

To determine if the measurements are precise, we need to look at the range of values obtained. In this case, the range is 5.10 - 4.95 = 0.15 g/mL, which is relatively large. A more precise set of measurements would have a smaller range.

To determine if the measurements are accurate, we need to look at how close they are to the known value. In this case, none of the measurements are close to the known value, indicating a lack of accuracy.

Additionally, calibration of the measuring instruments may also be necessary to improve accuracy.

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The atomic ratio of carbon to oxygen in carbon monoxide (CO) is 1:1, and the atomic ratio of carbon to oxygen in carbon dioxide (CO₂) is 2:1.

Firstly, we can analyze the decomposition of carbon monoxide (CO) and carbon dioxide (CO₂) to determine the atomic ratios involved.

Let's denote the atomic ratio of carbon to oxygen in carbon monoxide as x, and the atomic ratio of carbon to oxygen in carbon dioxide as y.

According to the given data;

Decomposition of carbon monoxide (CO);

Oxygen produced = 3.36 g

Carbon produced = 2.52 g

We know that the atomic mass of carbon is 12 g/mol, and the atomic mass of oxygen is 16 g/mol. Using these values, we can calculate the number of moles for each element;

Number of moles of oxygen = mass / atomic mass = 3.36 g / 16 g/mol = 0.21 mol

Number of moles of carbon = mass / atomic mass = 2.52 g / 12 g/mol = 0.21 mol

Since the atomic ratio of carbon to oxygen in carbon monoxide is x, we can write the following equation;

0.21 mol C / (0.21 mol O) = x

Simplifying the equation, we have;

x = 1

Therefore, the atomic ratio of carbon to oxygen in carbon monoxide is 1:1.

Decomposition of carbon dioxide (CO₂);

Oxygen produced = 9.92 g

Carbon produced = 3.72 g

Following the same calculations as before;

Number of moles of oxygen = mass / atomic mass = 9.92 g / 16 g/mol = 0.62 mol

Number of moles of carbon = mass / atomic mass = 3.72 g / 12 g/mol = 0.31 mol

Since the atomic ratio of carbon to oxygen in carbon dioxide is y, we can write the following equation;

0.31 mol C / (0.62 mol O) = y

Simplifying the equation, we have;

y = 0.5

Therefore, the atomic ratio of carbon to oxygen in carbon dioxide is 1:0.5, which can be simplified to 2:1.

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--The given question is incomplete, the complete question is

"Missed this? watch kcv: atomic theory; read section 2.3. you can click on the review link to access the section in your text. carbon and oxygen form both carbon monoxide and carbon dioxide. when samples of these are decomposed, the carbon monoxide produces 3.36 g of oxygen and 2.52 g of carbon, while the carbon dioxide produces 9.92 g of oxygen and 3.72 g of carbon. Calculate the atomic ratio of carbon to oxygen in carbon monoxide, and carbon dioxide."--

Answer:

The activation energy for the forward reaction is the amount of free energy that must be added to go from the energy level of the reactants to the energy level of the transition state. ... Once a reactant molecule absorbs enough energy to reach the transition state, it can proceed through the remainder of the reaction.

Explanation:

Answer: Activation energy is how much energy it takes for a reaction to occur.

Explanation:

Chemical indicators are the chemical reagents that show the change in reaction by changing color. Chemical indicators must be chosen with a narrow pH range.

Indicators are the solutions or the substances used for the qualitative and the quantitative measurement by a change in color because of the absence or the presence of the sample concentration.

The chemical indicators cannot detect the exact pH and should be used with a narrow range of pH.

Therefore, option C. the narrow range of pH is the disadvantage of chemical indicators.

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Answer:

C (They must be selected for a narrow ph range.

Explanation:

Edg 2022

Answer:

b

Explanation:

by using formula

a=(v-u)/t

where a= acceleration

v = initial velocity = 10 m/s

u= final velocity =50 m/s

t = time taken = 2s

The acceleration of the rocket has been given by 20 m/\(\rm sec^2\). Thus option B is correct.

Acceleration has been the increase in the speed of the object with respect to the time. The acceleration can be given by:

a = \(\rm \dfrac{v\;-\;u}{t}\)

Where,

a = acceleration

v = final velocity = 50 m/s

u = initial velocity = 10 m/s

t = time = 2 s

Substituting the values:

Acceleration = \(\rm \dfrac{50\;-\;10}{2}\)

Acceleration = 20 m/\(\rm sec^2\)

The acceleration of the rocket has been given by 20 m/\(\rm sec^2\). Thus option B is correct.

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After the Fischer Esterification, you will perform liquid-liquid extraction to isolate the ester. This can be achieved by mixing the reaction mixture with a non-polar solvent. The two immiscible liquids are then separated using a separating funnel. This process is also known as solvent extraction.

The non-polar solvent extracts the ester from the reaction mixture and is then separated using a separating funnel. Fischer esterification is the chemical process of esterification that involves the reaction of a carboxylic acid with an alcohol to form an ester and a water molecule. This reaction requires a strong acid catalyst, typically concentrated sulfuric acid or hydrochloric acid. Liquid-liquid extraction. Liquid-liquid extraction is a chemical separation process that is based on the distribution of a compound between two immiscible liquids. This process involves the extraction of a desired compound from one liquid phase into another liquid phase by the use of a suitable solvent. The two immiscible liquids are then separated using a separating funnel. This process is also known as solvent extraction.

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Answer:

Sedimentary rocks like bituminous coal, limestone, and sandstone, given enough heat and pressure, can turn into nonfoliated metamorphic rocks like anthracite coal, marble, and quartzite. Nonfoliated rocks can also form by metamorphism, which happens when magma comes in contact with the surrounding rock

Explanation: THEREFORE I'D SAY TRUE!

Answer:

Matter is any substance that has mass and takes up space. Any physical object consists of matter. It doesn't matter whether it's an atom, element, compound, or mixture. It's all matter. (Not a pun, i promise ツ)

However, unlike some believe, not everything you encounter in the world is matter. Matter can be converted into energy, which has neither mass nor volume. So, light, sound, and heat are not matter. Most objects have both matter and some form of energy, so the distinction can be tricky. For example, a candle flame certainly emits energy (light and heat), but it also contains gasses and soot, so it is still matter. The building blocks of matter are called "atoms" and "molecules." They, too, are matter. The matter we can detect normally is called "baryonic" matter. However, there is another type of matter out there, which can't be directly detected. But its influence can. It's called dark matter.

Attached below is a picture of examples of matter.

Key words and phrases:

matter, heat, light, dark matter, baryonic matter, sound, energy, mass, volume, space, physical

Hope this helps! Brainliest would be much appreciated! Have a great day! :)

Explanation:

Moles of Oxygen = 64/16 = 4

Moles of Hydrogen = 8/1 = 8

Hence the empirical formula is H2O.

The concentration of the solution with an absorbance of 0.374 is 0.265 M.

According to Beer's law, the absorbance of a solution is directly proportional to the concentration of the absorbing species and the pathlength of the cell:

A = εbc

where A is the absorbance, ε is the molar absorptivity (a constant for a given substance at a specific wavelength), b is the path length of the cell in centimeters, and c is the concentration of the solution in moles per liter.

We can rearrange this equation to solve for the concentration of the solution:

c = A / (εb)

We are given that a 0.336 M solution of CO2 has an absorbance of 0.473 at a given wavelength and a 1.00 cm path length cell.

Therefore, we can calculate the molar absorptivity of CO2 at this wavelength:

ε = A / (bc) = 0.473 / (0.336 M x 1.00 cm) = 1.409 M^-1 cm^-1

Now we can use this value of ε and the absorbance value of 0.374 to calculate the concentration of the solution:

c = A / (εb) = 0.374 / (1.409 M^-1 cm^-1 x 1.00 cm) = 0.265 M

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Answer:

Organic molecules contain carbon; inorganic compounds do not. Carbon oxides and carbonates are exceptions; they contain carbon but are considered inorganic because they do not contain hydrogen. The atoms of an organic molecule are typically organized around chains of carbon atoms.

\(E=hc/ \lambda\) is the equation for calculating the energy and wavelength of electron transitions in a one-electron system.

E = hv is the formula for calculating the energy of a single photon. It takes into account the energy in SI units of J, Planck's constant (h = 6.626 x 10-34 J s), and the frequency of the radiation in SI units of s-1 or Hertz, Hz. Wavelength and frequency are connected by the formula c/, where c is the speed of light, which is 2.998 x 108 m s-1.

The energy of the photon increases as the wavelength of light decreases. By dividing the aforementioned equation by Avogadro's number, one can determine the energy of a mole of photons with the wavelength

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