Help me please I have been stuck for some time

Answer:

The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles Iron(III) Oxide, or 159.6882 grams.

Answer:

Mg + Hso4 - Mgso4 + H

24g of magnesium- 120g of Mgso4

Xg. - 6g of Mgso4

Cross multiply

120x - 144

x = 144/120

x= 1.2g

The statement that best explains what is shown in their data is option D. The beautyberry increases its chances of reproduction because its berries do not all become ripe at the same time.

The data shows that the number of ripe berries and unripe berries varies from month to month, with the most ripe berries in April and the least in December.

This indicates that the beautyberry does not have all of its berries ripen at the same time, which increases the chances of some of them being eaten and spread by animals. This would help increase the chances of the beautyberry reproducing and spreading to new locations.

Therefore, It does not seem from the data provided that it relies on wind to spread its seeds or that it relies on one type of animal to eat the berries, or it uses asexual reproduction to make new plants.

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Answer:

Below

Explanation:

You didn't list any choices but stuff life color, density, texture,hardness, luster are PHYSICAL properties

The dz2 and the dx2-y2 orbitals have lobes that point directly at the ligands in a square-planar crystal field in d orbitals.

The d orbitals are a set of atomic orbitals found in the second energy level (n = 2) of an atom. They have a higher energy than the s and p orbitals in the first energy level (n = 1), and are represented by the letters d, dx, dy, dz and dxy, dxz and dyz.The d orbitals are composed of four orbitals which are degenerate (having the same energy) in an isolated atom. But when an atom is in a compound, the d-orbitals split into different energy levels due to the influence of the electrostatic forces of the neighboring atoms. This is called the crystal field splitting, which depends on the symmetry of the crystal and the coordination number of the central atom.

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Answer:

the electron is moving from one atom to another

The formula for standard deviation is: = (V1/C1) + (V2/C2) +... + (Vn/Cn).

Calculating the percent relative standard deviation (RSD) of the measurement will allow us to ascertain the degree of uncertainty in a standard solution created by pipetting 20 mL of a 0.2487 M (stock) solution.

The RSD is determined by multiplying the standard deviation by the mean and then by 100. The formula to determine the standard deviation is: = (V1/C1) + (V2/C2) +... + (Vn/Cn).

Where n is the number of measurements, C is the stock solution's concentration, and V is the volume of solution added.

We are unable to compute the RSD for the given information since you have not provided any information regarding the number of measurements taken.

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Answer:

178 grams

Explanation:

Took Test

The mass of a sample of NH3 containing 6.3× 10²⁴ molecules of NH₃ is 178 gm , i.e. Option B

A mole is defined as 6.022 × 10²³ atoms, molecules, ions, or other chemical units.

and the molar mass of a substance is defined as the mass of 1 mole of that substance, expressed in grams per mole.

It is equal to the mass of 6.022 × 10²³ atoms, molecules, or formula units of that substance.

6.022× 10²³ molecules are present in 1 mole

6.3× 10²⁴ molecules will be present in

[tex]\rm =\dfrac{6.3\times 10^{24}}{6.022\times 10^{23} } \;moles[/tex]

=  10.46 moles

Molar mass(1 mole) of NH₃ is 17 gm

10.46 moles will have mass of 10.46* 17 = 178 gm

The mass of a sample of NH₃ containing 6.3× 10²⁴ molecules of NH₃ is 178 gm , i.e. Option B.

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The volume of nitrogen produced from the reaction of 6.8 L of carbon monoxide is 3.7 L

In order to determine the volume of nitrogen produced from the reaction of 6.8 L of carbon monoxide, we need to use the balanced equation for the reaction:

2CO(g) + 2NO(g) -> N2(g) + 2CO2(g)

From the equation, we can see that for every 2 moles of CO that react, 1 mole of N2 is produced. The volume of a gas is directly proportional to the number of moles of the gas present.

If the initial volume of CO is 6.8 L, we can assume that the number of moles of CO is

6.8 L / 24.45 L/mol = 0.278 mol.

Therefore, the number of moles of N2 produced would be

0.278 mol CO * (1 mol N2 / 2 mol CO) = 0.139 mol N2.

Finally, using the ideal gas law PV = nRT (where P is pressure, V is volume, n is the number of moles, R is the ideal gas constant, and T is temperature), we can calculate the volume of N2 produced:

V = nRT / P

V = 0.139 mol N2 * (8.314 J/mol*K) * (273 K) / (1 atm) = 3.7 L

So, the volume of nitrogen produced from the reaction of 6.8 L of carbon monoxide is 3.7 L.

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Answer:

4.35 * 10^-8 M

Explanation:

Since the concentration of the hydronium ion= 2.3 X 10^-7 M

And we know that;

[H3O^+] [OH^-] = 1 * 10^-14

[H3O^+]  = concentration of the hydronium ion

[OH^-] = concentration of the hydroxide ion

So;

[OH^-] =1 * 10^-14/[ H3O^+]

But [H3O^+] = 2.3 X 10^-7 M

[OH^-] = 1 * 10^-14/2.3 X 10^-7

[OH^-] = 4.35 * 10^-8 M

The transfer of energy doe not always affect the appearance of the lake because it can attain a form that is quite similar to the other. It can be because of conduction, convection, and radiation.

Heat transference can be described as a natural phenomenon that can be caused by conduction, convection, or radiation.

Convection can be defined as the transfer of energy in a given fluid such as, in this case, water. The energy transfer is due to particular molecular motion, energy is transferred by bulk, or macroscopic, the motion of the fluid.

Radiation can be defined as heat transfer through space due to electromagnetic radiation. Conduction can be defined as the transfer of energy between molecules due to direct contact.

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The action "Heat energy was retained and water vapor condensed." characterized Earth's earliest atmosphere (atmosphere I)

Earth's earliest atmosphere, also known as atmosphere I, was primarily composed of methane, ammonia, and water vapor. The heat energy from the young Earth's molten surface caused these gases to rise and cool, leading to the condensation of water vapor and the formation of oceans. This process is known as the "greenhouse effect," as the retained heat energy allowed for the formation of a hospitable environment for the emergence of life. Ultraviolet light from the sun also played a role in the formation of the atmosphere by breaking down water vapor into hydrogen and oxygen, but this was not the primary process that characterized atmosphere I.

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Answer:

open the windows, turn off all electronics (take out all of the plugs), then find where the gas is coming from.

Explanation:

Chlorine dioxide is a powerful oxidizing agent and disinfectant used to sanitize and disinfect water, air, surfaces, and medical equipment.

What is Chlorine?

Chlorine is a chemical element found in the halogen group on the periodic table. It has the atomic symbol Cl, and its atomic number is 17. Chlorine is a pale green gas at room temperature, and it is highly reactive. Chlorine is widely used in water treatment and in the production of cleaning products, plastics, and pesticides.

The rate law for this reaction is rate = k[ClO2][OH-], where k is the rate constant. To calculate the rate constant, we can use the following equation:

k = (rate2 - rate1)/([ClO2]2 - [ClO2]1)([OH-]2 - [OH-]1)

Substituting the values for experiments 1 and 2, we get:

k = (0.00276 - 0.0248)/((0.020 - 0.060)(0.030 - 0.030)) = -0.142

The value of the rate constant is k = -0.142 mol/((L s)mol2).

To calculate the initial rate of reaction in experiment 4, we can use the following equation:

rate = k[ClO2][OH-]

Substituting the values for experiment 4, we get:

rate = -0.142(0.040)(0.060) = -0.0043 (mol/((L s))

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The empirical formula for the given compound is C6H6.

The molecular formula represents the precise digits of the atoms found in the given molecule of the compound, whereas the empirical formula represents the proportional of the atoms found in the provided compound.

The empirical formula defines the individual atoms that make up a species in the simplest whole number ratio possible. The

The empirical formula is always multiplied by the molecular formula.

Given the foregoing, the empirical formula for the molecular formula is n.

Because of this, the molecular formula is: 78.0 g m o l 1 = n ( 12.011 + 1.00794 ) g m o l 1

n \s= \s78 \s12.011 \s+ \s1.00794 =6 \s .

And the chemical formula is C 6 H 6.

Molecular formula, although not always.≡

empirical formula, which includes the multiple n=1 \s .

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Answer:

1.17 atm

Explanation:

Calculation to determine the total pressure inside the container (in atm)

Using this formula

Total pressure = Partial pressure 1 + Partial pressure 2

Where,

Partial pressure 1=0.53 atm

Partial pressure 2=0.639 atm

Let plug in the formula

Total pressure = 0.53 atm + 0.639 atm

Total pressure = 1.17 atm

Therefore the total pressure inside the container (in atm) is 1.17 atm

After solving the equation the car's kinetic energy is 783,500 kg m2/s2.

Kinetic energy is the energy of motion, or the energy associated with an object or system due to its motion. It is a form of energy that can be converted into other forms of energy, such as thermal energy, sound energy, electrical energy, and so on.

The car's kinetic energy is the energy it has due to its motion. Kinetic energy is calculated as KE = 1/2mv2, where m is mass and v is velocity. In this case, the car has a mass of 2,050 kg and is traveling at 28 meters per second. Plugging these values into the equation gives:
KE = 1/2(2050 kg)(28 m/s)2
= 1/2(2050 kg)(784 m2/s2)
= 783500 kg m2/s2
Therefore, the car's kinetic energy is 783,500 kg m2/s2.

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Hazardous materials are substances or chemicals that pose a health hazard, a physical hazard, or harm to the environment.

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2 ounces of water will be measured using the measuring cup introducing before part A when making the cake.

Both units (that is, ml and ounces) are equal, meaning they measure the same quantity and can be converted to each other.

Given that:

1fluid oz = 29.7ml

Part A measurements are not shown. Therefore, we will explain using hypothetical values.

Let the amount of water measured with the measuring cup in part A be 10 ml.

The equivalent number of ounces (x) is calculated as follows:

1 fluid oz = 29.7ml

x = 10ml

By using equality

x * 29.7ml = 1 fluid oz * 10ml

By canceling common units

x * 29.7 = 10 fluid oz

Divide both sides by 29.7.

x = 0.3367 fluid oz

Approximate to the nearest half.

x = 0.5 fluid oz

This means that the equivalent amount of water is 0.5 ounces.

What if the measurement is 55mL.

We apply the same steps here also:

x fluid oz = 55ml

x *29.7 = 1 fluid oz * 55 ml

Divide both sides by 29.7

x = 2 fluid oz

This means that the equivalent amount of water is 2 ounces.

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The relationship between the enthalpy (ΔH) and entropy (ΔS) of a reaction that is never spontaneous is -ΔH, +ΔS option - B is correct answer.

When a reaction occurs spontaneously, the system doesn't require any additional energy input because the change in free energy is negative.

When the enthalpy change is negative and the entropy change is positive, the reaction is always spontaneous.

The free energy change is always positive and the reaction is never spontaneous if the reaction is endothermic (H positive) and the entropy change S is negative (less disorder).

Although a spontaneous reaction may result in an increase or decrease in entropy or enthalpy, it will always result in a decrease in free energy, which is a negative G.

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Note that statement best explains what is shown in the above-tabularized data is: "The beautyberry increases its chances of reproduction because its berries do not all become ripe at the same time. (Option D)

The statistics in the above table appear to reflect the ripening of berries and the number of blossoms of a plant, presumably called beautyberry. It can be noticed that the amount of ripe berries and blossoms varies each month.

This implies that the beautyberry does not produce all of its berries at once, but rather over the course of several months. This might boost the odds of reproduction by providing a food supply for animals and birds for a longer length of time.

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The solubility product constant (Ksp) for a substance is the equilibrium constant for the reaction between the dissolved ions of the substance and its solid form. In the case of Ca3(PO4)2, the equation for the reaction in water is: Ca3(PO4)2 (s) ↔ 3Ca2+ (aq) + 2PO43- (aq)

The solubility product constant, Ksp, for this reaction is represented by the equation:

Ksp = [Ca2+]^3 * [PO43-]^2Where [Ca2+] represents the concentration of calcium ions in molarity and [PO43-] represents the concentration of phosphate ions in molarity.

Solubility refers to the maximum amount of a substance that can dissolve in a given solvent at a given temperature and pressure. For example, the solubility of sugar in water is the maximum amount of sugar that can dissolve in water at a given temperature and pressure. The solubility of a substance can be influenced by temperature, pressure, and the presence of other dissolved substances.

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Answer:46 moles of carbon dioxide and 12 moles of ethane.

Explanation:

46 moles of carbon dioxide and 12 moles of ethane.

A non-flammable, colorless gas, carbon dioxide is. While being far less common in the atmosphere than nitrogen and oxygen, carbon dioxide plays a crucial influence in determining the composition of the air on our planet.

Carbon dioxide, a colourless gas having a faint sharp odour and a sour taste. It is one of the most important greenhouse gases linked to global warming, but it is a minor component of Earth’s atmosphere .

It is formed in combustion of carbon-containing materials, in fermentation, and in respiration of animals and employed by plants in the photosynthesis of carbohydrates.

Therefore, 46 moles of carbon dioxide and 12 moles of ethane.

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The orcas will compensate the lack of the oxygen that being respired for the minute at time and with the high amount of the hemoglobin in the blood.

The orcas will be able to slow down their heart beat when they are diving . this will decrease the amount of the oxygen demand but this not good for them it will be very stressful on their body.

The hemoglobin will increase the efficiency of their respiration.  The orcas are the sea mammals . the orcas will be dive for the long period of the time in to the water. They will easily breathe through blowhole.

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Answer:

Whereas ionic bonds join metals to non-metals, metallic bonding joins a bulk of metal atoms.

Explanation:

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sodium azide (NaN3) is used to inflate the safety airbags in automobiles (g) This airbag should be filled with N2 at a pressure of 1.15 atm and temperature of 26.0°C. It has a volume of 36 L.

Modern automobiles use numerous technical components and subsystems, each of which performs a specific design function. Some of these have thousands of individual pieces and were made possible by new or improved technologies, such as electronic computers, high-strength polymers, and novel alloys of steel and nonferrous metals. Air pollution, safety regulations, and global manufacturer competition, among other things, have all contributed to the development of some subsystems.

With an estimated 1.4 billion in use worldwide, passenger vehicles have become the main form of family transportation. In the United States, where more than three trillion miles (almost five trillion kilometers) are traveled annually, roughly one-fourth of these are located.

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Answer:

Here's the chemical equation:

Cl2 + KI → KCl + I2

Cl2(g)+2KI(aq)→I2(s)+2KCl(aq)