Two reactants combine to form a product in the reaction A + BC. The rate of the
reaction depends on the concentrations of both reactants squared (rate = K[A]²[B]²).
What's the total reaction order of this reaction?
OA) 3
OB) 4
OC) 2
OD) 1

Answer:

if the temperature increases to 44°C, the pressure exerted on the damaged lungs would be approximately 1.334 atm.

Explanation:

To determine the pressure being exerted on the damaged lungs, we can use the combined gas law, which states that the pressure of a gas is inversely proportional to its volume when temperature and amount of gas remain constant.

The combined gas law equation is: P₁V₁/T₁ = P₂V₂/T₂

Where:

P₁ = Initial pressure (1 atm)

V₁ = Initial volume (6 L)

T₁ = Initial temperature (32°C + 273.15 = 305.15 K)

P₂ = Final pressure (unknown)

V₂ = Final volume (4.5 L)

T₂ = Final temperature (44°C + 273.15 = 317.15 K)

Rearranging the equation to solve for P₂, we have:

P₂ = (P₁V₁T₂) / (V₂T₁)

Substituting the values:

P₂ = (1 atm * 6 L * 317.15 K) / (4.5 L * 305.15 K)

Calculating this expression gives us:

P₂ ≈ 1.334 atm

The maximum mass of P2I4 that can be prepared is 9.22 grams.

To determine the maximum mass of P2I4 that can be prepared, we need to find the limiting reactant in the given reaction. The limiting reactant is the one that is completely consumed, thus determining the maximum amount of product that can be formed.

Let's calculate the number of moles of each reactant:

P4O6: Given mass = 7.95 g, molar mass = 283.88 g/mol

Number of moles = mass / molar mass = 7.95 g / 283.88 g/mol = 0.028 g/mol

I2: Given mass = 12.48 g, molar mass = 253.8 g/mol

Number of moles = mass / molar mass = 12.48 g / 253.8 g/mol = 0.049 g/mol

Now, let's use the stoichiometry of the reaction to determine the mole ratio between P4O6 and P2I4. From the balanced equation, we can see that the ratio is 5:4.

Since the ratio of P4O6 to P2I4 is 5:4, we can calculate the theoretical yield of P2I4 based on the moles of P4O6.

The number of moles of P2I4 that can be formed from P4O6 = (0.028 mol P4O6) * (4 mol P2I4 / 5 mol P4O6) = 0.0224 mol P2I4

To convert the moles of P2I4 to grams, we can use the molar mass of P2I4:

Molar mass of P2I4 = (2 * atomic mass of P) + (4 * atomic mass of I) = (2 * 30.97 g/mol) + (4 * 126.9 g/mol) = 411.68 g/mol

The maximum mass of P2I4 that can be prepared from the given reactants is:

Mass of P2I4 = (0.0224 mol P2I4) * (411.68 g/mol) = 9.22 g.

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Taking 1500 mg of vitamin C daily amounts to approximately 1.2045 pounds per year.

Dr. Linus Pauling suggested that taking 1500 mg of vitamin C daily could result in milder and fewer colds. To determine the weight in pounds per year, we'll first convert milligrams to pounds and then multiply by the number of days in a year.

To convert milligrams to pounds, we need to know that there are 453,592.37 milligrams in a pound. Therefore, 1500 mg is equal to 0.0033 pounds (1500 mg / 453,592.37 mg/lb).

Now, to calculate the weight in pounds per year, we'll multiply 0.0033 pounds by the number of days in a year (365).

Weight in pounds per year = 0.0033 pounds/day * 365 days/year = 1.2045 pounds/year.

Therefore, taking 1500 mg of vitamin C daily amounts to approximately 1.2045 pounds per year.

It's important to note that while this calculation provides the weight equivalent, the effectiveness and recommended dosage of vitamin C for preventing colds should be discussed with a healthcare professional, as individual needs may vary.

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Explanation:

Functional groups containing nitrogen are amines and amides.

The general formula for amines is:

RNH₂, where R = longer hydrocarbon chain.

The general formula for amides is:

RCONH₂, where R = longer hydrocarbon chain.

See attached diagram for general structural formula.

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To rank these least polar=1 to most polar=11, we need to understand what polarity is. The term "polarity" refers to the distribution of electrical charge in a molecule.

A molecule is polar if its electron cloud is distributed unevenly and has poles, resulting in the molecule having a positive and a negative end. A molecule is nonpolar if its electron cloud is distributed uniformly, resulting in the molecule having no charge poles.

The ranking of the given compounds from least polar to most polar is as follows:

Least polar: 7 (nonpolar)

4 (nonpolar)

9 (nonpolar)

1 (nonpolar)

8 (polar)

2 (polar)

6 (polar)

5 (polar)

10 (polar)

3 (most polar)

Most polar: 3 (most polar)

The reasoning behind this ranking is that the difference in electronegativity between the two atoms that make up the molecule determines polarity.

The greater the difference in electronegativity between two atoms, the more polar the bond between them is. As a result, we can classify the compounds as nonpolar and polar. We rank these compounds based on their polarity, with the least polar being nonpolar and the most polar being polar.

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The pressure (P) of the manager's pop machine is 0.38 psi or 0.026 atm.

Given the following values:

Temperature (T) = 12 °C

Volume (V) = 450 mL = 0.45 L

Pressure (P) = UnknownTemperature (T) = 5 °C

Volume (V) = 355 mL = 0.355 L

Pressure (P) = 7 psi = 0.48 atm

To find the pressure (P) of the manager's pop machine in both psi and atm, we can use the Ideal Gas Law, which is given by: PV = nRT

Where:

P = Pressure  V = Volume  T = Temperature  n = Number of moles  R = Universal gas constant

Let's first convert the volume and temperature to SI units.

Volume (V) = 0.45 L  

Temperature (T) = 12 + 273 = 285 K

For the first condition, we have: P1V1/T1 = nR/P1V1/T1 = P2V2/T2 (At constant temperature and volume)

P2 = P1(V2/V1)

For the second condition, we have: P1V1/T1 = P2V2/T2P2 = (P1V1T2)/(V2T1)

Now, let's plug in the values.P1 = ?V1 = 0.45 LT1 = 285 KP2 = 7 psi = 0.48 atmV2 = 0.355 LT2 = 278 K (5°C + 273)

First, we'll find the pressure (P) in psi. P2 = P1(V2/V1)0.48 = P1(0.355/0.45)P1 = 0.38 psi

To convert psi to atm, we use the following conversion factor: 1 atm = 14.7 psi0.38 psi x (1 atm/14.7 psi) = 0.026 atm.

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Answer: A thermometer

Explanation: The best tool for measuring temperature change in this scenario would be a thermometer. A thermometer is specifically designed to measure temperature and can accurately indicate changes in temperature when substances are mixed or undergo reactions. When sodium hydroxide (NaOH) is dissolved in water, it is an exothermic reaction, meaning it releases heat. By using a thermometer, Thomas can monitor and measure the temperature change that occurs as sodium hydroxide dissolves in water. It is important to select a suitable thermometer that can accurately measure the desired temperature range and ensure that it is calibrated correctly for accurate readings. Additionally, it is advisable to use a thermometer that is specifically designed for liquid measurements, such as a liquid-in-glass thermometer or a digital thermometer with a suitable probe for liquid measurements. These types of thermometers provide reliable temperature readings and are commonly used in scientific experiments and laboratory settings to measure temperature changes accurately.

The equation for the reaction between silver nitrate (AgNO3) and sodium chloride (NaCl) is: AgNO3 + NaCl → AgCl + NaNO3.

In this reaction, silver nitrate (AgNO3) reacts with sodium chloride (NaCl) to produce silver chloride (AgCl) and sodium nitrate (NaNO3).

When the two solutions are mixed, the silver ions (Ag+) from silver nitrate combine with chloride ions (Cl-) from sodium chloride to form silver chloride, which is a white, insoluble precipitate. The sodium ions (Na+) from sodium chloride combine with nitrate ions (NO3-) from silver nitrate to form sodium nitrate, which remains in solution.

The reaction is a double displacement reaction, also known as a precipitation reaction, as a solid precipitate (silver chloride) is formed. This reaction occurs due to the exchange of ions between the two reactants.

Silver chloride is sparingly soluble in water and precipitates out of the solution as a solid due to its low solubility. Sodium nitrate, being a soluble ionic compound, remains dissolved in the solution as individual ions.

This reaction is commonly used in the laboratory to test for the presence of chloride ions. The formation of the white precipitate of silver chloride confirms the presence of chloride ions in the solution.

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The correct dose for a 175 lb patient would be approximately 0.48602 grams.

To convert 6.13 mg/kg to grams, we need to consider the weight of the patient and perform a unit conversion. Here's the step-by-step process:

1. Convert the weight of the patient from pounds to kilograms.

  175 lb * (1 kg / 2.205 lb) = 79.37 kg (rounded to two decimal places)

2. Calculate the correct dose in grams by multiplying the patient's weight by the given dosage.

  79.37 kg * 6.13 mg/kg = 486.02 mg

3. Convert the dose from milligrams (mg) to grams (g) by dividing by 1000.

  486.02 mg / 1000 = 0.48602 g (rounded to five decimal places)

Therefore, the correct dose for a 175 lb patient would be approximately 0.48602 grams.

It's important to note that this calculation assumes the dosage is based on body weight and that the given dosage is appropriate for the patient's condition. Always consult a healthcare professional or follow the instructions of a medical prescription for accurate dosing information.

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Answer:

The atomic size decreases with an increase in atomic number when we move from left to right.

Explanation: Hope it helps you:))))))

                      Have a great day.

Electrolysis of nitric acid produces hydrogen gas at the cathode and nitrogen dioxide, oxygen gas, and hydrogen ions at the anode.

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The correct option that represents a precipitation reaction is:

B. K2CO3 + PbCl2 -> 2KCl + PbCO3

In a precipitation reaction, two aqueous solutions are mixed, resulting in the formation of an insoluble solid called a precipitate. This solid is formed due to the combination of certain ions that are no longer soluble in the solution.

In option B, when potassium carbonate (K2CO3) reacts with lead chloride (PbCl2), it produces potassium chloride (2KCl) and lead carbonate (PbCO3) as the products. Lead carbonate is an insoluble compound and forms a precipitate, which indicates a precipitation reaction.

Options A, C, and D do not represent precipitation reactions:

- Option A represents a double displacement reaction between magnesium bromide (MgBr2) and hydrochloric acid (HCl), resulting in the formation of magnesium chloride (MgCl2) and hydrogen bromide (HBr).

- Option C represents a substitution reaction between lithium acetate (LiC2H3O2) and tetrabromotitanium (IV) (TiBr4), forming lithium bromide (LiBr) and tetrakis(acetato) titanium (IV) (Ti(C2H3O2)4).

- Option D represents a double displacement reaction between ammonium nitrate (NH4NO3) and copper chloride (CuCl2), resulting in the formation of ammonium chloride (NH4Cl) and copper nitrate (Cu(NO3)2).

Therefore, option B is the correct representation of a precipitation reaction.

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As combustion always result into the formation of water, the other type of reactions that may result into formation of water are Acid-Base Neutralization Reactions and Hydrogen and Oxygen Reaction.

Acid-Base Neutralization Reactions:

A neutralisation reaction is a chemical process in which an acid and a base combine to produce salt and water as the end products.

H⁺ ions and OH⁻ ions combine to generate water during a neutralisation reaction. Acid-base neutralisation is the most common type of neutralisation reaction.

Example: Formation of Sodium Chloride (Common Salt):

HCl + NaOH → NaCl + H₂O

Hydrogen and Oxygen Reaction:

Water vapour is created when hydrogen gas (H₂) and oxygen gas (O₂) are combined directly. This reaction produces a lot of heat and releases a lot of energy.

Example: 2 H₂ + O₂ → 2 H₂O

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Answer:

solution is 0.584 M

Explanation:

The Lewis structure of the compounds that we gave are shown in the image attached.

The valence electrons of an atom in a molecule are shown in an electron dot diagram, sometimes referred to as a Lewis dot diagram or Lewis structure. It depicts the outermost electrons surrounding an atomic symbol using dots or other symbols to show their interconnectedness and distribution within a chemical species.

The idea behind the electron dot diagram is that in order to establish a stable electron configuration resembling that of a noble gas, atoms tend to gain, lose, or share electrons. The chemical behavior and reactivity of an atom are determined by the quantity of valence electrons.

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Like charges repel each other, while opposite charges attract each other. This principle is one of the fundamental aspects of electrostatics. According to Coulomb's law, the force between two charged particles is directly proportional to the product of their charges and inversely proportional to the square of the distance between them.

As the distance between two charged particles decreases, the force between them increases. This is because the closer the particles are, the stronger the electric field they create, leading to a stronger force of interaction.

On the other hand, as the magnitude of the charges decreases, the force between the particles also decreases. This is because the force is directly proportional to the product of the charges. If one or both of the charges are smaller, the force they exert on each other will be weaker.

In summary, according to Coulomb's law, decreasing the distance between charged particles increases the force between them, while decreasing the magnitude of the charges decreases the force. This understanding of the relationship between charge, distance, and force is crucial in explaining the behavior of charged particles and the interactions between them.

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The direction in which the electron flows in the voltaic cell can be shown by A, B, C, D. Option A

A voltaic cell, often referred to as a galvanic cell, is an electrochemical device that uses a redox (reduction-oxidation) reaction to transform chemical energy into electrical energy. It is made up of two half-cells joined together by a conductive channel, allowing electrons to move freely between them. An electrode dipped in an electrolyte solution is present in each half-cell.

To keep the electrical balance in the half-cells, the passage of electrons is accompanied by ion mobility through the electrolyte solutions. The redox process might continue as a result of the ions' mobility, which completes the circuit.

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Answer:

When sodium hydrogen carbonate (also known as baking soda) reacts with lemon juice (which is acidic), a chemical reaction occurs. The expected observations and the explanation for each observation are as follows:

1. Effervescence (bubbling): As the lemon juice (citric acid) reacts with sodium hydrogen carbonate, carbon dioxide gas is produced. This gas escapes as bubbles, leading to effervescence. The reaction can be represented as follows:

Sodium Hydrogen Carbonate + Citric Acid → Carbon Dioxide + Water + Sodium Citrate

2. Release of a citric-like odor: When citric acid from the lemon juice reacts with the sodium hydrogen carbonate, it forms sodium citrate, which has a fruity odor similar to citric acid.

3. Change in color or formation of foam: Depending on the specific lemon juice used, there might be a color change or the formation of foam due to the interaction between the citric acid and the baking soda. This observation can vary depending on the concentration of the lemon juice and the amount of baking soda used.

4. No further visible change: Once the reaction is complete, there will be no other visible changes. The carbon dioxide gas produced during the reaction will dissipate into the air, and the solution will reach a new equilibrium.

Overall, the reaction between sodium hydrogen carbonate and lemon juice is an acid-base reaction, resulting in the production of carbon dioxide gas. This reaction is commonly used in baking to create a leavening effect and make baked goods rise.

Answer:

To find the mass of the liquid at 30°C, we first need to determine the volume of the liquid shown in the graduated cylinder. We can do this by using the markings on the cylinder to measure the volume.

Once we have the volume, we can use the density of the liquid to calculate the mass. The formula for calculating the mass of an object with known density and volume is:

mass = density x volume

Using the given information, we have:

density = 23 g/mL volume = the volume shown in the graduated cylinder

Explanation:

A precipitation reaction is a chemical reaction in which a solid forms when two aqueous solutions are mixed. The correct answer is option B: [tex]K_2CO_3 + PbCl_2 \rightarrow 2KCl + PbCO_3.[/tex]

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For the solution with a pH of 7.9:

pH = 7.9

pOH = 14 - pH = 14 - 7.9 = 6.1

[H+] = 10^(-pH) = 10^(-7.9) (in mol/L)

[OH-] = 10^(-pOH) = 10^(-6.1) (in mol/L)

The pH of a solution is a measure of its acidity, while pOH is a measure of its alkalinity. The pH and pOH values are related through the equation pH + pOH = 14.

For the solution with a pH of 4.5:

pH = 4.5

pOH = 14 - pH = 14 - 4.5 = 9.5

[H+] = 10^(-pH) = 10^(-4.5) (in mol/L)

[OH-] = 10^(-pOH) = 10^(-9.5) (in mol/L)

For the solution with a pH of 7.9:

pH = 7.9

pOH = 14 - pH = 14 - 7.9 = 6.1

[H+] = 10^(-pH) = 10^(-7.9) (in mol/L)

[OH-] = 10^(-pOH) = 10^(-6.1) (in mol/L)

Note: The [H+] and [OH-] concentrations can also be calculated using the equation [H+][OH-] = 1 x 10^(-14) at 25°C.

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Answer:

Percent composition tells you the relative amounts of each element in a molecule by mass. It can be used to determine the empirical formula of a compound, as well as to compare the composition of different molecules.

For example, the percent composition of water (H2O) is 11.19% hydrogen and 88.81% oxygen by mass. This tells us that there are two hydrogen atoms for every one oxygen atom in the molecule.

Explanation:

Brainliest Plsss

Answer:

x*10ⁿ (units)

Explanation:

Scientific notation never has leading or trailing zeros.

0.0064 would be expressed as 6.4*10³

6400 would be expressed as 6.4*10³

multiplying by 10 to an exponent just adds or subtracts zeros, so count how many zeros have to be added or subtracted, and multiply by 10ⁿ, where n is how far from the decimal point.

Answer:

1.5 moles of hydrogen will form if 3.0 mole of potassium metal reacts completely with hydrochloric acid.

Explanation:

The balanced chemical equation for the reaction of potassium metal with hydrochloric acid is:

2K(s) + 2HCl(aq) → 2KCl(aq) + H2(g)

As per the above equation, 2 moles of potassium reacts with 2 moles of hydrochloric acid to produce 1 mole of hydrogen gas.

So, for 3.0 moles of potassium metal react with hydrochloric acid, we can say that it will produce 3.0/2 = 1.5 moles of hydrogen gas.

Therefore, 1.5 moles of hydrogen will form if 3.0 mole of potassium metal reacts completely with hydrochloric acid.

Answer:105.99 g/mol

Explanation:

Sodium carbonate is the inorganic compound with the formula Na₂CO₃ and its various hydrates. All forms are white, odourless, water-soluble salts that yield alkaline solutions in water.

Answer: 100 ohms.

Explanation:

The circuit is composed of two parallel branches (upper and lower), with one resistor in the upper branch (150) and two resistors in the lower branch (250 and 50).

The lower branch resistors are in series, so the lower branch's resistance is:

250 + 50 = 300.

Now, the upper branch (150) and total lower branch (300) are in parallel, so:

[tex]\frac{1}{R} = \frac{1}{150} + \frac{1}{300}[/tex]

That is,

[tex]\frac{1}{R} = \frac{3}{300} = \frac{1}{100}[/tex],

Solving for R, we find R = 100.

The equivalent resistance of this circuit is 100 ohms.