why does aicar accumulate in the presence of sulfanilamide?

Answer:

PbCO₃ + 2HNO₃ –> Pb(NO₃)₂ + CO₂ + H₂O

Explanation:

From the question given above:

Solid lead (II) carbonate reacts with a dilute solution of nitric acid (HNO₃) to give a solution of lead (II) nitrate,

carbon dioxide and water.

The above can be represented in the equation form as follow:

PbCO₃ + HNO₃ –> Pb(NO₃)₂ + CO₂ + H₂O

Finally, we shall balance the equation as follow:

PbCO₃ + HNO₃ –> Pb(NO₃)₂ + CO₂ + H₂O

There are 2 atoms of H on the right side and 1 atom on the left side. It can be balance by putting 2 in front of HNO₃ as shown below:

PbCO₃ + 2HNO₃ –> Pb(NO₃)₂ + CO₂ + H₂O

Now, the equation is balanced.

The concentration as t continues indefinitely is that it approaches 30 gms/L.

Concentration is a measurement of how much solute there is per volume of solution. In chemistry, concentration is most frequently expressed in molarity by units of molar (M), that is moles per liter solution. Concentration measures the amount of a substance dissolved in a volume of another substance. This can be measured in moles per liter, also called molarity.

In this case, after t minutes, 25t liters of brine have been pumped into the tank, and it makes the volume in the tank is 5000 + 25t liters. Later, after t minutes, those 25t liters of brine have added (25t L) 30 g L = 750t g of salt. So the concentration of salt after t minutes will be:

C(t) = 750t / 5000 + 25t

= 25 * 30t / 25 (200 + t)

= 30t / 200 + t

Thus, to see what happens to the concentration as t → ∞ we need to compute:

lim t → ∞ 30t / 200 + t

= lim t → ∞ (30t * 1/t) / (200 + t) * 1/t

= lim t → ∞ 30 / (200/t + 1)

= 30

Hence, the concentration approaches 30 gms/L as the process continues indefinitely.

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Although part of your question is missing, you might be referring to this full question: A tank contains 5000 L of pure water. Brine that contains 30 g of salt per liter of water is pumped into the tank at a rate of 25 L/min. Show that the concentration of salt after t minutes (in grams per liter). What happens to the concentration as t → ∞?

(a) There may be a decrease in the yield of the intended product, 1-methylcyclohexene. (b)Collecting all the distillate in one container can inhibit the separation of desirable components with different boiling points. (c) If the intended product is generated preferentially from a certain isomer or if the various isomers result in undesirable side effects or products.

(a) Forgetting to include the phosphoric acid: Phosphoric acid is frequently utilized as a catalyst in the dehydration of alcohols, such as the transformation of 2-methylcyclohexanol into 1-methylcyclohexene. The reaction might not happen or happen much more slowly if the phosphoric acid is not introduced. As a result, there may be a decrease in the yield of the intended product, 1-methylcyclohexene. This mistake would probably result in a decline in the reaction's overall efficiency and a lower yield of the targeted product.

(b) Collecting the entire distillate in a single vessel as opposed to two:

The fractions may mix if the distillate, which contains the desired product, is gathered in a single container as opposed to two separate containers. The product's quality may be harmed by contamination or dilution as a result of this mixing, making it more difficult to separate and assess. Since the collected volume would vary from the predicted values, the inaccuracy might also affect how the product's yield is quantified. Additionally, collecting all the distillate in one container can inhibit the separation of desirable components with different boiling points if the distillation process involves separation based on distinct boiling points.

(c) Using the pure trans isomer of 2-methylcyclohexanol rather than a combination of isomers can affect the outcome of a process when a mixture of isomers is intended to be used in it. The relative quantities of the isomers in the mixture may have an impact on the rate of the reaction and the distribution of the end product. If only one isomer is used, the reaction might not go as planned, leading to a different product yield or altered product distribution. This mistake has the potential to have a considerable negative effect on the experimental results, particularly if the intended product is generated preferentially from a certain isomer or if the various isomers result in undesirable side effects or products.

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Answer:

0.66g/mL

Explanation:

La densidad es una propiedad de la materia definida como la masa de una sustancia en un determinado volumen.

En este problema, podemos hallar la densidad sabiendo que la diferencia de masas del pic vacío y el pic lleno es la masa de la solución y que el volumen que ocupa es de 25mL:

Masa solución:

25g - 8.5g = 16.5g

Así, la densidad será:

16.5g / 25mL =

Answer:

0.003221

Explanation:

When we multiply anything by 10 times a power, we follow the base 10 decimal system.

To convert 3.221 × 10⁻³ from scientific notation to standard notation, simply move the decimal place 3 places to the left:

3.221 × 10⁻³ = 0.003221

Answer:

Single replacement

Explanation: Al is replacing Cu

Answer: 112.2 g

Explanation:

The atomic mass of silicon is 32.065 g/mol, so 3.5 moles have a mass of (3.5)(32.065) grams, or about 112.2 g

The new freezing point of the solution is 1.09 °C.

Based on the given information, the freezing point of pure water is 0.0 °C, and the freezing point changes by 1.09 °C. To find the new freezing point of the solution, we need to add the change in freezing point to the freezing point of pure water.

0.0 °C + 1.09 °C = 1.09 °C

Therefore, the new freezing point of the solution is 1.09 °C.

When performing calculations with significant figures, it's important to consider the rule for addition and subtraction. According to this rule, the result should be rounded to the least number of decimal places among the values being added or subtracted. In this case, both the freezing point of pure water (0.0 °C) and the change in freezing point (1.09 °C) have one decimal place. Thus, the final answer is also rounded to one decimal place, resulting in a new freezing point of 1.1 °C.

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Answer:

I don't know about the rest but A is heptane

The reactant in bold, HClO (aq), can be identified as both a Bronsted-Lowry acid and a Lewis acid.

1. Bronsted-Lowry acid: According to the Bronsted-Lowry theory, an acid is a substance that donates a proton (H+) in a chemical reaction. In the given reaction, HClO donates a proton to (CH3)3N, which acts as a Bronsted-Lowry base by accepting the proton. Therefore, HClO can be identified as a Bronsted-Lowry acid.
2. Lewis acid: According to the Lewis theory, an acid is a substance that accepts a pair of electrons during a reaction. In this case, HClO can be seen as a Lewis acid because it accepts a pair of electrons from (CH3)3N, which acts as a Lewis base.

HClO reacts with (CH3)3N to form ClO- and (CH3)3NH. In this reaction, HClO donates a proton (H+) and accepts a pair of electrons, making it both a Bronsted-Lowry acid and a Lewis acid.
It's important to note that (CH3)3N can also be identified as a Bronsted-Lowry base and a Lewis base because it accepts a proton and donates a pair of electrons, respectively. To summarize, HClO is both a Bronsted-Lowry acid and a Lewis acid in this reaction.

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Answer:

evaporation means the state of the water went from liquid to gas which is a physical change. the sugar is still in the beaker which means its chemical properties did not change.

Explanation:

The skeletal system is the system that provides support to an organism, internal and made up of bones and cartilage in vertebrates, external in some other animals.

Tendon is a tough band of flexible but inelastic fibrous collagen tissue that connects a muscle with its bony attachment and transmits the force which the muscle exerts.

The femur is the bone that extends from the pelvis to the knee in humans. It is the largest bone of the human body.

The carpal bones are any of the eight bones of the carpus, which is the group of bones that make up the wrist.

The osseous or bone tissue is the major structural and supportive connective tissue of the body which forms the rigid part of the bone organs that make up the skeletal system.

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Explanation:

The union of vinegar and bicarbonate produces carbon dioxide

The carbonic acid, which is weaker, in turn breaks down into water and carbon dioxide, which being volatile separates

will observe a yellow color, confirming that BASIC HYDROLYSIS has taken place. To the touch the bottle cools and in the end a white deposit may remain on the bottom.

1. The empirical formula of the compound is C₅H₅O

2. The molecular formula of the compound is C₁₀H₁₀O₂

We'll begin by calculating the mass of C, H and O in the compound. This can be obtained as follow:

Mass of CO₂ = 212 mg

Molar mass of CO₂ = 44 g/mol

Molar mass of C = 12 g/mol

Mass of C = 12/44 × 212

Mass of H₂O = 43.4 mg

Molar mass of H₂O  = 18 g/mol

Molar mass of H₂ = 1 × 2 = 2 g/mol

Mass of H = 2/18 × 43.4

Mass of C = 57.82 mg

Mass of H = 4.82 mg

Mass of compound = 78.1 mg

Mass of O = (Mass of compound ) – (mass of C + mass of H)

Mass of O = 78.1 – (57.82 + 4.82)

1. Determination of the empirical formula of the compound.

Mass of C = 57.82 mg

Mass of H = 4.82 mg

Mass of O = 15.46 mg

Divide by their molar mass

C = 57.82 / 12 = 4.818

H = 4.82 / 1 = 4.82

O = 15.46 / 16 = 0.966

Divide by the smallest

C = 4.818 / 0.966 = 5

H = 4.82 / 0.966 = 5

O = 0.966 / 0.966 = 1

Therefore, the empirical formula of the compound is C₅H₅O

2. Determination of the molecular formula of the compound.

Molar mass of compound = 162 g/mol.

Empirical formula = C₅H₅O

Molecular formula = empirical formula × n = molar mass

[C₅H₅O]n = 162

[(12×5) + (5×1) + 16]n = 162

[60 + 5 + 16]n = 162

81n = 162

Divide both side by 81

n = 162 / 81

Molecular formula = [C₅H₅O]n

Molecular formula = [C₅H₅O]₂

Thus, the molecular formula of the compound is C₁₀H₁₀O₂

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Answer: There is equal number of each type of atom on the reactant and product side.

Explanation:

Problems with understanding what happens when things burn can be attributed to various factors, such as lack of knowledge about the combustion process, the role of oxygen, and the production of heat and light energy.

When things burn, a chemical reaction called combustion takes place. During this process, a fuel reacts with oxygen, resulting in the release of energy in the form of heat and light. The products of combustion are usually water, carbon dioxide, and sometimes other gases or particles, depending on the fuel and the burning conditions.

One issue in understanding this process is grasping the importance of oxygen. Oxygen is required for combustion to occur, and the presence of more or less oxygen affects the burning process. For example, in a well-ventilated area, the combustion is more efficient, whereas limited oxygen can result in incomplete combustion and the production of harmful byproducts like carbon monoxide.

Another problem in understanding combustion is the role of heat. Heat is both a product of and a catalyst for combustion. As a fuel gets heated, it may reach its ignition temperature, at which point it spontaneously ignites. Heat also contributes to the spread of fire, as it can cause nearby objects to reach their ignition temperature.

The production of light during combustion is another aspect that can cause confusion. The light emitted during burning is a result of excited atoms and molecules in the flame that release energy in the form of light when they return to their original state. This is what makes flames visible and gives them their characteristic colors.

In summary, problems with understanding what happens when things burn stem from a lack of knowledge about the combustion process, the role of oxygen, and the production of heat and light energy. Gaining a deeper understanding of these factors can help individuals better comprehend the complex nature of combustion and fire safety.

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PbO  +  CO  →  Pb + CO₂

Oxidation States of the Elements

      Reactants     Products

Pb       +2                   0

O       -2, -2               -4

C         +2                 +4

Since the oxidation state/number of Pb decreased, it is being Reduced.

Since the oxidation state/number of C increased, it is being Oxidized.

The balanced ionic equation for the oxidation reduction reaction between Al(s) and Sn2+(aq) is 3 Al(s) + 2 Sn2+ (aq) → 3 Al3+(aq) + 2 Sn(s)  

what is redox reaction balancing?

To counteract this, we will separately write each oxidation and reduction reaction and explicitly mention the quantity of electrons in each. Half reactions are what are known as the oxidation and reduction processes separately.

Als) → A13+ (aq) + 3 e-

Sn2+ (aq) + 2e- → Sn(s)

3 Al(s) + 2 Sn2+ (aq) → 3 Al3+(aq) + 2 Sn(s)

The half reactions will then be combined into a full reaction, which should then be balanced, by doing multiples of each reaction until the quantity of electrons on each side totally cancels. The half reaction method is the name for this technique for redox reaction balancing.

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The title "Experimental Determination of Ca-Silicate Dissolution Rates: A Source of Calcium for Geologic CO2 Sequestration" suggests that the study focuses on investigating the dissolution rates of calcium silicate minerals and their potential role as a source of calcium in the process of geologic carbon dioxide (CO2) sequestration.

Geologic CO2 sequestration refers to the capture and storage of carbon dioxide in underground geological formations, typically deep saline aquifers or depleted oil and gas reservoirs. This process aims to mitigate the release of CO2 into the atmosphere and reduce its impact on climate change. In this context, calcium silicate minerals are of interest because they can react with CO2 to form stable carbonate minerals, effectively storing the CO2 over geological timescales.

The study described in the title likely involves experimental investigations to determine the rate at which calcium silicate minerals dissolve when exposed to certain conditions. This information is important for understanding the feasibility and efficiency of using calcium silicates as a source of calcium ions for mineral carbonation reactions during CO2 sequestration. By quantifying the dissolution rates, researchers can assess the potential of these minerals to provide a long-term supply of calcium ions for CO2 mineralization processes.

Overall, the research described in the title contributes to the understanding of geochemical processes involved in geologic CO2 sequestration and provides insights into the role of calcium silicate minerals as a calcium source in this context.

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In the blosum-62 substitution matrix, a large positive score corresponds to substitution that occurs frequently.

BLOSUM-62 is used to account for the type of substitution when comparing sequences. To identify the problem the first approach is examining the substitutions that have actually taken place in evolutionary related proteins.

From an examination of appropriately aligned sequences, substitution matrices have been deduced. A substitution matrix describes a scoring system for the replacement of any amino acid with each of the other 19 amino acids.

In these matrices, a large positive score corresponds to a substitution that only occurs relatively frequently, whereas a large negative score corresponds to a substitution that only occurs rarely. A commonly used matrix, the BLOSUM-62 stands for Blocks of amino acid substitution matrix.

Each column in the matrix represents one of the 20 amino acids, whereas the position of the single letter codes within each column specify the score for the corresponding substitution.

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When 16.68 grams of methane (CH4) are burned. Therefore, 2.06moles  of oxygen gas will be used.

A mole is merely a measuring unit. In reality, it is one of the International System of Units' seven foundation units (SI). When basically determines are insufficient, new units are created.

Chemical reactions frequently occur at levels that use grams would be inappropriate, but using actual figures of atoms/molecules/ions could also be misleading. As a result, scientists devised the moles to bridge the divide between extremely small and extremely huge numbers.

CH\(_4\) + 2 O\(_2\) \(\rightarrow\)CO\(_2\)+ 2 H\(_2\)O

moles of methane = 16.68 /16.04=1.03moles

the mole ratio between methane and oxygen is 1:2

mole of oxygen = 2×1.03=2.06moles

Therefore, 2.06moles  of oxygen gas will be used.

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\(E=hc/ \lambda\) 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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Answer:

The density is 2.5625g/mL. Hope this helped! :)

Explanation:

M= 8.2g                                                                               D=M/V

V= 28.3-25.1=3.2mL

D=8.2g/3.2mL

D= 2.5625g/mL

Answer:

Flerovium

Explanation:

Answer:

Fl or flerovium. Atomic number is the number above the element on a periodic table.

Answer:

Decrease the volume to increase pressure and to increase concentration.

Explanation:

Increasing the concentration will increase the number of collisions per second and therefore the rate of reaction.

Pls mark me as brainliest.

Answer:

The last option: Decrease the volume to increase pressure and to increase concentration.

Explanation:

You can support your choice on basis of the collision theory.  According to the collision theory, chemical reactions happen when the molecules collide with each other, in the correct orientation and with enough kinetic energy to overcome the activation energy.  As a consequence, the larger the number of collisions the larger the rate of a reaction.  In the case of a reaction that involves gases, decreasing the volume will increase the pressure and the concentration (volume is inversely related to both the pressure and the concentration) causing the molecules to be closer to each other and to collide with higher frequency, this is you will expect more collisions, and so an increase on the rate of the reaction. That is expressed by the last choice: decrease the volume to increase pressure and to increase concentration.

This question is asking for the number of atoms of silver metal that are required to react completely with 531.8 g of iodine to produce silver iodide. At the end, the result turns out to be 2.524x10²⁴ atoms:

In chemistry, stoichiometry is a tool for us to perform mole-mass-particles relationships in chemical reactions. Thus, these problems require a balanced chemical equation, molar masses and the Avogadro's number to proceed.

In such a way. we start by writing the balanced equation for this problem:

\(2Ag+I_2\rightarrow 2AgI\)

Hence, we can calculate the atoms of silver with the following stoichiometric setup:

\(531.8gI_2*\frac{1molI_2}{253.81gI_2}*\frac{2molAg}{1molI_2} *\frac{6.022x10^{23}atomsAg}{1molAg}\)

Where 253.81 is the molar mass of diatomic iodine, 2:1 the mole ratio of silver to iodine and 6.022x10²³ the Avogadro's number. Thus, after solving, we obtain:

\(2.524x10^{24}atomsAg\)

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Explanation:

Moles of Carbon used

= 48g / (12g/mol) = 4.0mol.

Moles of Oxygen used

= 128g / (32g/mol) = 4.0mol.

C + O2 => CO2

Therefore 4.0mol of CO2 is produced, which is equal to 91.2dm³ or 176g. (depending on gas or solid)

because some system are so large,small,or complex they are difficult to predict

Scientists used models because some systems are so large, small, or complex they are difficult to predict, to aid in the development of questions and explanations about systems, and to replicate and simplify physical reality to allow for precise experiments. The correct option is B.

A scientist is someone who collects and analyzes research and evidence in order to develop and test hypotheses and gain and share understanding and knowledge.

A scientist can be further defined by how they approach this, for example, through the use of statistics or data.

A scientist is a professional who conducts and collects research to advance knowledge in a specific field.

Scientists may develop hypotheses, test them using various methods such as statistics and data, and draw conclusions based on the evidence.

Models were used by scientists because some systems are so large, small, or complex that they are difficult to predict.

To aid in the development of questions and explanations about systems, and to replicate and simplify physical reality in order to conduct precise experiments.

Thus, the correct option is B.

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Answer:

testable questions are answer through observation or an experiment that provides evidence that the questions connects to the scientific concepts rather the opinion feelings

therefore the question can be tested through observation or experiment