Na2S + 2HCl - 2NaCl + H2S

55g

159 67g ?

What is missing from the equation, and how do you know?

The correct order of the increasing polarity of the analyte functional group isEthers < Esters.

The given statement is "Polarities of analyte functional group increase in the order of hydrocarbon ethers < esters."  The order of polarities of functional groups is the order of their increasing polarity (i.e., less polar to more polar) based on their electron-donating or withdrawing ability from the rest of the molecule.Polarity of analyte: The analyte's polarity is directly proportional to the dipole moment of the functional group, which is associated with a difference in electronegativity between the atoms that make up the functional group.The electronegativity of an element is its ability to attract electrons towards itself. The greater the difference in electronegativity between two atoms, the more polar their bond, and hence the greater the polarity of the molecule.

To find the correct order of the increasing polarity of the analyte functional group, let's first compare the two groups: hydrocarbon ethers and esters. Here, esters have a carbonyl group while ethers have an oxygen atom with two alkyl or aryl groups. The carbonyl group has more electronegative oxygen, which pulls electrons away from the carbon atom, resulting in a polar molecule. On the other hand, ethers have a less polar oxygen atom with two alkyl or aryl groups, making them less polar than esters. Therefore, the correct order of the increasing polarity of the analyte functional group isEthers < Esters.

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Answer:

solid ,hard, not see through

Explanation:

Answer:

There are many properties out there, so three include bright yellow color, luster shine, and the maleability that determines the durability.

2Na + 2H2O → 2NaOH + H2

The balanced equation

Answer:

Answer Down below

Explanation:

Question answered: Why is downward displacement of water unsuitable for collecting a gas that dissolves in water?

: The reason why downward displacement of water unsuitable is bc  downward displacement of water as it is less denser than water. meaning it comes out of the surface water, that means it is insoluble in water so it does not dissolve in water.

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Answer:

122 gm

Explanation:

54 days is 2 half lives :    ( 27 * 2 = 54)

  1/2   * 1/2 = 1/4 will be left

      1/4 * 488 = 122 gm

A balance can be used to measure the amount of gas being produced by measuring the change in mass before and after the gas is released.

To measure the amount of gas produced, a closed container or reaction vessel is placed on the balance. The initial mass of the container, including the reactants, is recorded. As the reaction proceeds and gas is produced, the total mass inside the container decreases.

By monitoring the change in mass over time, one can determine the amount of gas being produced. The mass difference is attributed to the mass of the gas generated during the reaction.

It is essential to ensure that the reaction vessel is airtight and that no gas escapes during the process. By using a precise and sensitive balance, even small changes in mass can be accurately measured.

This method is commonly used in experiments where the gas produced is difficult to capture directly or when determining the stoichiometry of a reaction involving gases. The balance provides a direct and quantitative measurement of the gas production by monitoring the change in mass.

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Answer:

A pure substance consists only of one element or one compound and a mixture consists of two or more different substances, not chemically joined together.

So, a mixture is like mixing - let's say - sugar and rice together (dry BTW), but you can clearly see both substance are not chemically mixed together, if that makes sense. Thus, you can easily separate them out.

Answer: I don't know if this helps but here's some information I think might help.

Usually, cells will take between 5 and 6 hours to complete S phase. G2 is shorter, lasting only 3 to 4 hours in most cells. In sum, then, interphase generally takes between 18 and 20 hours. Mitosis, during which the cell makes preparations for and completes cell division only takes about 2 hours. Calculate the percentage of time spent in each phase by counting the total number of cells in each phase (total in interphase, in prophase, etc.) and dividing each by the total number of cells you counted. How do cancer cells differ in total time required for mitosis? Cancer cells produce 117 minutes faster than regular cells. ... Normal cells require 640 minutes during interphase, cancer cells only need 380. For prophase, cancerous cells need 15 minutes less than regular cells. Another hallmark of cancer cells is their "replicative immortality," a fancy term for the fact that they can divide many more times than a normal cell of the body. In general, human cells can go through only about 40-60 rounds of division before they lose the capacity to divide, "grow old," and eventually die 3.

Answer:

1.008 atm

Explanation:

From the question given above, the following data were obtained:

Total pressure (Pₜ) = 1.043 atm

Partial pressure of H₂ over Water (Pᵥᵥ) = 0.035 atm

Partial pressure of dry H₂ (Pₔ) =?

The partial pressure of dry H₂ in the container can be obtained as shown below:

Pₜ = Pₔ + Pᵥᵥ

1.043 = Pₔ + 0.035

Collect like terms

1.043 – 0.035 = Pₔ

Pₔ = 1.008 atm

Thus, partial pressure of dry H₂ in the container is 1.008 atm

The redox couple with the highest (most positive) redox potential is d. plastocyanin-Cu2+/plastocyanin-Cu.

The redox couple plastocyanin-Cu2+/plastocyanin-Cu does indeed have the highest (most positive) redox potential among the options provided.

Plastocyanin is a copper-containing protein involved in electron transfer within the photosynthetic electron transport chain. Its redox potential is relatively high due to the strong oxidizing properties of copper and its ability to accept and donate electrons during the electron transfer process.

Compared to the other redox couples mentioned in the options, plastocyanin-Cu2+/plastocyanin-Cu has the highest redox potential, making it an essential component in the electron transfer process and contributing to the efficient functioning of photosynthesis.

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Answer:

Explanation:

Using Organic Compounds quick check

do you know the refining design quick check

Answer: connections academy?

Explanation: do you go there? I saw that you were answering questions and asking for help on the midterm for A&P and the same one is currently on schedule for me

Answer:

(a) from the anode to the cathode through the external circuit

Explanation:

In an electrochemical cell, there are two half cells; the oxidation half cell and reduction half cell. Oxidation typically refers to loss of electrons and reduction refers to gain of electrons.

Electrons always flow from the anode to the cathode or from the oxidation half cell to the reduction half cell.

The electrical circuit in an electrochemical cell confirms the flow of electron. Usually a light bulb is attached. The correct option is;

(a) from the anode to the cathode through the external circuit

In an electrochemical cell, the direction which electrons travel is: (a) from the anode to the cathode through the external circuit.

Electrons can be defined as the subatomic particles of a chemical element that are negatively charged and have a magnitude of -1.

An electrochemical cell refers to a device that is capable of either generating electric current from the electrical energy released by a spontaneous redox reaction or using an electrical energy to cause chemical reactions.

Generally, an electrochemical cell is also referred to as a secondary cell and a good example is a rechargeable battery.

In Science, the direction of flow of current is usually from the anode (positive side) to the cathode (negative side) in an electrical circuit.

On a related, current is made up of electrons and as such the direction which electrons travel is usually from the anode to the cathode through the external electrical circuit.

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Boiling point of the solution ≈ 100.9672°C

To determine the concentration of ethylene glycol in a solution of water in molality, we can use the equation:

ΔTf = kf * molality

Given that the freezing point dropped by 2.64°C and kf for water is 1.86°C/m, we can rearrange the equation to solve for molality:

molality = ΔTf / kf

Substituting the values, we get:

molality = 2.64°C / 1.86°C/m

molality ≈ 1.42 m

For the second question, to calculate the boiling point of the solution, we can use the equation:

ΔTb = kb * molality

Given that kb for water is 0.52°C/m, and the solution contains 10.0g of sodium chloride dissolved in 100.0g of water, we need to convert the masses to moles:

moles of sodium chloride = mass / molar mass
moles of sodium chloride = 10.0g / (22.99g/mol + 35.45g/mol) ≈ 0.186 mol

molality = moles of solute / mass of solvent (in kg)
molality = 0.186 mol / 0.1 kg = 1.86 m

Substituting the values into the equation, we get:

ΔTb = 0.52°C/m * 1.86 m

ΔTb ≈ 0.9672°C

The boiling point of the solution is the sum of the boiling point of pure water (100°C) and the ΔTb:

Boiling point of the solution = 100°C + 0.9672°C

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Answer:

D) Sun's heat

Explanation:

The water cycle is driven primarily by the energy from the sun. This solar energy drives the cycle by evaporating water from the oceans, lakes and rivers.

Answer:

D) sun's heat

Explanation:

The sun's heat provides enough energy to water molecules at the surface so they move fast enough to escape from the water. The water does not need to boil.

Answer:

Ⓓ The process follows the law of conservation of mass and energy is found in the product

Explanation:

This question depicts PHOTOSYNTHESIS, which is the process employed by green plants to manufacture their food in form of sugars (glucose). The general equation, which was given in the question is as follows:

6CO2 + 6H2O + energy → C6H12O6 + 6O2

This chemical reaction follows the LAW OF CONSERVATION OF MASS, which states that the amount of matter in reactant must equate that of the product. In this case, each element contains the same number of atoms in both reactant side and product side.

Also, energy is contained in the product but stored in the chemical bonds of the glucose molecule formed.

Nuclear power plants heat water to produce steam. The steam is used to spin large turbines that generate electricity. Nuclear power plants use the heat produced during nuclear fission to heat water. In nuclear fission, atoms are split apart to form smaller atoms, releasing energy.

                                                 or

The water in the core is heated by nuclear fission and then pumped into tubes inside a heat exchanger. Those tubes heat a separate water source to create steam. The steam then turns an electric generator to produce electricity. The core water cycles back to the reactor to be reheated and the process is repeated.

The pressure of hydrogen gas formed in mmHg is 716.24 mmHg.

Based on the information provided, we can use the formula for Dalton's Law of Partial Pressures which states that the total pressure of a gas mixture is equal to the sum of the partial pressures of each gas present in the mixture.
In this case, the total gas pressure collected over water is 740.0 mmHg. We know that the gas we are interested in is hydrogen gas, so we need to find the partial pressure of hydrogen gas in the mixture.
To do this, we need to subtract the vapor pressure of water at 25.5°C from the total pressure to get the pressure of the gas. According to a vapor pressure chart, the vapor pressure of water at 25.5°C is 23.76 mmHg.
Thus, the partial pressure of hydrogen gas can be calculated as:
Partial pressure of hydrogen gas = Total gas pressure - Vapor pressure of water
Partial pressure of hydrogen gas = 740.0 mmHg - 23.76 mmHg
Partial pressure of hydrogen gas = 716.24 mmHg
Therefore, the pressure of hydrogen gas formed in mmHg is 716.24 mmHg.

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Answer:

35.50

Explanation:

There are two stable isotopes, 35Cl (75.77%) and 37Cl (24.23%), giving chlorine a standard atomic weight of 35.45

Answer: The correct option is 1.5 ml

Explanation:

To determine the volume of a 100 mg/ml injectable to draw up for a 150 mg dose, we can use the following formula:

Volume = (Dose in mg) / (Concentration in mg/ml)

Plugging in the values, we get:

Volume = (150 mg) / (100 mg/ml) = 1.5 ml

Therefore, the volume of a 100 mg/ml injectable to draw up for a 150 mg dose is 1.5 ml.

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Given that the reaction A — → Products is second-order with respect to A. We need to determine the true statements among the given statements. When [A] doubles, the rate quadruples. This is true because the rate of a second-order reaction varies directly as the square of the concentration of the reactant. The correct options are options (A) and (B).

Therefore, when the concentration of A doubles, the rate of the reaction will be four times. The plot of [A]2 versus time gives a straight line with slope +k. This statement is true. The slope of the plot of [A]2 versus time gives a straight line with slope +k. This is because the rate constant is

k = slope/intercept.

A plot of [A] versus time gives a straight line with slope – k.

This statement is not true.

The plot of [A] versus time gives a straight line with slope –k.

This is because the rate constant is

k = -slope/intercept.

A plot of [A]– versus time gives a straight line with slope +k.

This statement is not true because the reaction is second-order with respect to A, not first-order with respect to A.

The plot of [A]– versus time gives a straight line with slope -k.

None of the statements above are true.

This statement is not true as the first and the second statement is correct, hence option (E) is incorrect.

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Answer:

are you interested in tun

In order to convert integers to floats and execute arithmetic operations, we can use a syntax directed definition and semantic actions.

The grammar rules can be defined as follows:

1. expr -> expr + term {print(add(expr.addr, term.addr))}
2. expr -> expr - term {print(subtract(expr.addr, term.addr))}
3. term -> term * factor {print(multiply(term.addr, factor.addr))}
4. term -> term / factor {print(divide(term.addr, factor.addr))}
5. factor -> ( expr ) {print(expr.addr)}
6. factor -> int {addr = convert_to_float(int)}
7. factor -> float {addr = float}

The semantic actions can be defined as follows:

1. convert_to_float(int) - a function that takes an integer input and converts it to a float value.
2. add(a,b) - a function that takes two address values and outputs 3-address code for adding them.
3. subtract(a,b) - a function that takes two address values and outputs 3-address code for subtracting them.
4. multiply(a,b) - a function that takes two address values and outputs 3-address code for multiplying them.
5. divide(a,b) - a function that takes two address values and outputs 3-address code for dividing them.

Using these rules and functions, we can convert integers to floats as needed and execute arithmetic operations while outputting 3-address code.

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Answer:

78.5 mL

Explanation:

Step 1: Given data

Mass of the lead fishing weight: 39.7 g

Volume of water in the graduated cylinder: 75.0 mL

Step 2: Calculate the volume of the lead fishing weight

The density of lead is 11.34 g/mL.

39.7 g × (1 mL/11.34 g) = 3.50 mL

Step 3: Calculate to what volume will increase the water level

The final volume of water will be equal to its initial value plus the volume displaced by the lead fishing weight.

V = 75.0 mL + 3.50 mL = 78.5 mL

Answer:

Option d is correct

Explanation:

The basis of the VSEPR model of molecular bonding is that to minimize repulsions, electron domains in the valence shell of an atom arrange on their own.

According to VSEPR theory, if there are two electron domains on a central atom, they will be arranged such that the angles between the domains are 180°

Answer:

About 203.381 grams

Explanation:

We need to first determine the molar mass of Ba3(PO4)2.

We have:

3 Bariums - 137.327*3 = 411.981

2 Potassiums - 39.098*2 = 78.198

8 Oxygens - 16*8 = 128

Add these together and we get 618.179 g/mol

If we only want 0.329 moles, then we multiply those two numbers together to get about 203.381 grams.

The time period during which there is water in the tank can be described as (-∞, -8) ∪ (-5, 3). This means that there is water in the tank before 8 minutes have passed since the leak began and between 5 and 3 minutes before the present time.

The given function f(x) = -x^3 - 10x^2 - x + 120 represents the volume of water in the tank at a given time x (measured in minutes since the leak began). To determine the time period during which there is water in the tank, we need to find the values of x for which f(x) is greater than zero.

By analyzing the function and its graph, we can observe that f(x) is positive for values of x in the intervals (-∞, -8) and (-5, 3). This means that before 8 minutes have passed since the leak began and between 5 and 3 minutes before the present time, the volume of the tank is positive, indicating that there is water in the tank during those time periods.

Therefore, the time period during which there is water in the tank is (-∞, -8) ∪ (-5, 3).

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The molar mass of HCl is 36.46 g/mol, and the molar mass of H₂O is 18.02 g/mol.

What is molar mass?

Molar mass is a physical property of a substance, defined as the mass of a given substance divided by its amount of substance in moles. It is usually expressed in units of grams per mole (g/mol). Molar mass is used to calculate the mass of a particular substance from its molar quantity, or to calculate the quantity of a particular substance from its mass.

In order to calculate the number of moles of HCl required to produce 180. g of water, we must first calculate the number of moles of H2O that are produced. Since the molar mass of H₂O is 18.02 g/mol, we can divide 180. g by 18.02 to get the number of moles produced:

180. g / 18.02 g/mol = 10.00 moles of H₂O

Now, since the reaction is 1:1 (1 mole of HCl for 1 mole of H₂O), we can simply multiply the number of moles of H₂O produced (10.00 moles) by 1 to get the number of moles of HCl required:

10.00 moles H₂O × 1 mole HCl/1 mole H₂O = 10.00 moles HCl

Therefore, in order to produce 180. g of water, 10.00 moles of HCl are required.

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Answer:

bacteria, protists, and yeast.

Explanation:Unicellular organisms are made up of only one cell that carries out all of the functions needed by the organism, while multicellular organisms use many different cells to function. Unicellular organisms

Answer:

Larger

Explanation: