How many grams of solid potassium chlorate (KCIO3) decompose to form solid
potassium chloride and 790 mL of oxygen gas at 111 °C and 770 torr? (3 sf)

Answer:

\(rate = k[C] {}^{2} [D] {}^{2} \\ 7.5 \times {10}^{ - 3} = k {(0.25)}^{2} {(0.50)}^{2} \\ k = \frac{7.5 \times {10}^{ - 3} }{ {(0.25)}^{2} {(0.50)}^{2} } \\ k = 0.48 \: {mol}^{ - 3} {dm}^{9} {s}^{ - 1} \)

The structural formula of butanol is C4H9OH. It consists of a chain of four carbon atoms, with a hydroxyl (-OH) group attached to one of the carbon atoms. Butanol has several structural isomers, which have the same molecular formula but different structural formulas.

A structural isomer is a compound that has the same molecular formula as another compound but has a different arrangement of its atoms. A string of 4 C atoms are bonded above, below, left, and right to H, except the second C, which is bonded below to O, which is bonded below to H is a structural isomer of butanol.

This is called butan-2-ol. The structural formula of butan-2-ol is CH3CH(OH)CH2CH3. In this isomer, the hydroxyl group is attached to the second carbon atom in the chain, whereas in butanol, the hydroxyl group is attached to the first carbon atom in the chain.

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Answer:LOL

42

Explanation:

The mass of a single potassium atom is 6.50×10⁻²³ grams potassium atoms would be in 114 milligrams of potassium 17.53 ×10⁻²³.

An atom is the most diminutive form of any chemical compound that takes part in the chemical reaction to form any product and it is equal to the one mole which is 2.303 ×10²³ moles of the Avogadros number.

To calculate the number of atoms we have,  6.50×10⁻²³ grams of potassium and the value of one particle is 2.303 ×10²³ moles,

           atoms =   6.50×10⁻²³  / 114 milligrams of potassium

          atoms of potassium = 17.53 ×10⁻²³. atoms.

Therefore, 17.53 ×10⁻²³.atoms are present if the mass of a single potassium atom is 6.50×10⁻²³ grams potassium atoms would there be in 114 milligrams of potassium.

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The pressure increases from 300 torr to 400 torr, the volume of the gas decreases from 3.75L.

Pressure is the force per unit area applied on a surface by a fluid, such as a gas or liquid. It is measured in terms of pascals (Pa), or the equivalent unit of kilograms per square meter (kg/m2). Pressure is a measure of the amount of force that is exerted on an object by another object in the same or opposite direction. It is a critical concept in many areas of science, including physics, chemistry, engineering, and medicine. Pressure is created when a fluid is in motion and its movement is resisted by the resistance of the object or medium it comes into contact with.

The volume of a gas is inversely proportional to its pressure, meaning that as pressure increases, volume decreases. Therefore, when the pressure increases from 300 torr to 400 torr,
the volume of the gas decreases from 5L to 5L x (300/400)
= 3.75L.

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Answer:

cornea,Jens and pupil

tma Po yan

True, a sodium intake above 2000 milligrams per day may increase and sodium loss in the urine increasing a person's risk for bone loss.

As you mature, ones body could soak up both phosphate and calcium from ones bones instead of conserving these minerals. This tends to make your bones weaker. Once this procedure reaches a particular point, it is made reference to as osteoporosis. Many times, an individual will shatter a bone even before they understand they have bone loss Osteoporosis causes bones to weaken and fragile — so crumbly that what a fall and even mild emphasises such as having to bend over or coughing can end up causing a fracture. Most osteoporosis-related fractures occur in the hip, wrist, or spine. Sodium levels inside the body are partially controlled by a hormone known as aldosterone, which would be made by the adrenal glands.Aldosterone levels instruct the kidneys when sodium should be retained in the body rather than excreted in the urine. When you sweat, you lose a small amount of sodium through your skin.

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Answer:

∆Hrxn 1 + ∆Hrxn 3 - ∆Hrxn 2 = ?

-1410.9kJ - 571.6kJ + 3119.4kJ = ?

-2801.1kJ

Answer:

radius = 16 in ; height = 27 in

In the exercise, we are shown an isotope of Osmium, Os. Osmium has an atomic number equal to 76.

An isotope is a variation of a chemical element, which has the same atomic number but varies the number of neutrons, i.e. those particles that have a neutral charge.

There are two important terms that we must know, which are atomic number and atomic mass.

Atomic number: It is the number of protons present in the nucleus of an atom.

Atomic mass: It is the sum of the protons and neutrons present in the nucleus.

So, in an isotope, the atomic mass will vary but the atomic number will remain the same because if the number of protons is changed it will mean that we have a different element.

Now let's see the representation of an isotope in the following figure:

In the figure we see how an isotope is represented, as an example, we have carbon 11. The upper number gives us the atomic mass, i.e. the sum of neutrons and protons and the lower number tells us the atomic number, i.e. the number of protons. The number of electrons is determined by the number of protons since they are in the same quantity but with opposite charges, that is negative charge.

In this example we have as upper number 35, this is the atomic mass (neutrons + protons). And as lower number 17, this is the atomic number and equal to the number of protons in the nucleus.

If we subtract these two values, we will have the number of neutrons in the nucleus.

The number of electrons is equal to the number of protons.

So, if we want to calculate the number of neutrons, we have to substrate the atomic mass minus atomic number, as follows:

Neutrons = Atomic mass - Atomic number

Neutrons = 191 - 76 = 115

The answer will be: There are 115 neutrons

Answer:

It is rich in organisms because sunlight passes through its shallow water enabling photosynthesis to occur.

Explanation:

I hope that helped!!

The formula for calculating the amount of energy or heat released is:

ΔH = C ΔT

where ΔH is heat of combustion, C is heat capacity, while ΔT is change in temperature

ΔH = 8.69 kJ / °C * (5.14°C)

ΔH = 44.67 kJ

Then we calculate the moles of CH3OH which has molar mass of 32.04 g/mol:

moles = 1.922 / 32.04 = 0.05999 mol

SO the molar heat of combustion is:

ΔHm = 44.67 kJ / 0.0599875 mol

ΔHm = 744.60 kJ / mol

The percent composition of CuBr₂ is approximately 28.46% of Cu and 71.54% of Br.

To determine the percent composition of CuBr₂ (copper(II) bromide), we need to calculate the mass of each element in the compound and then divide it by the molar mass of the entire compound.

The molar mass of CuBr₂ can be calculated by adding up the atomic masses of copper (Cu) and bromine (Br) in the compound. The atomic masses of Cu and Br are approximately 63.55 g/mol and 79.90 g/mol, respectively.

Molar mass of CuBr₂ = (63.55 g/mol) + 2(79.90 g/mol) = 223.35 g/mol

Now, let's calculate the percent composition of each element in CuBr₂:

Percent composition of copper (Cu):

Mass of Cu = (63.55 g/mol) / 223.35 g/mol × 100% ≈ 28.46%

Percent composition of bromine (Br):

Mass of Br = 2(79.90 g/mol) / 223.35 g/mol × 100% ≈ 71.54%

Therefore, the percent composition of CuBr₂ is approximately:

- Copper (Cu): 28.46%

- Bromine (Br): 71.54%

These values represent the relative mass percentages of copper and bromine in the compound CuBr₂.

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The Nernst Equation Cell Potential and Concentration. Keep in mind that free energy actually changes. realizing the actual cell potential and non-standard concentrations. The steps for calculating cell potentials under unusual circumstances. For the given reaction, set up the reaction quotient. the Nernst Equation by substituting the additional information.

What is the actual cell potential, e cell, for the cell?

A concentration cell is an electrochemical device of this sort, where the only difference between the anode and cathode compartments is the concentration of a reactant. Both Ecell and the differential in Ag+ concentration between the two compartments will get smaller as the reaction goes on. The potential difference between two half cells in an electrochemical cell is measured by the cell potential, or Ecell.

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The concept Arrhenius equation is used here to determine the frequency factor for the reaction. Here for the given reaction, the frequency factor is 3.814.

The Arrhenius equation explains the relationship between the activation energy and rate of the reaction. The lower the activation energy, higher will be the rate of reaction. The equation is:

\(k=A . e^{-E_{a} } / RT\)

k - rate constant

A - frequency factor

Eₐ - activation energy

R - Gas constant

T - Temperature in Kelvin

261 kJ per mole = 261000 J/mol

325°C + 273 = 598 K

6.1 × 10⁻⁸ = A . e⁻261000/ 8.314 × 598

A = 3.814

Thus the frequency factor for the reaction is 3.814.

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Answer:The larva might form a cocoon or a chrysalis.

Explanation:

The activation energy of this reaction is approximately -13.770 J/mol.

1. To graphically determine the activation energy, we need to plot two points. The given data points are:

  Point 1: (1, -1.275)

  Point 2: (2, 0.379725)

2. The rise is the change in the y-coordinate between the two points:

  Rise = y2 - y1 = 0.379725 - (-1.275) = 1.654725

3. The run is the change in the x-coordinate between the two points:

  Run = x2 - x1 = 2 - 1 = 1

4. The slope of the line formed by these two points can be calculated using the formula:

  Slope = rise / run = 1.654725 / 1 = 1.654725

5. The activation energy (Ea) can be determined using the equation:

  Ea = -R * slope

 Here, R is the ideal gas constant, which is approximately 8.314 J/(mol·K).

6. Plugging in the values:

  Ea = -8.314 * 1.654725 = -13.770 J/mol

Note that the activation energy is negative because it represents the energy difference between the reactants and the transition state (higher energy) in an exothermic reaction.

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Answer:

41826.05 Calories

Explanation:

1 J = 0.239006 Calories

175 KJ

= 175 x 1000 J

= 175000 J

175000 J to Calories

= 175000 x 0.239006

= 41826.05 Calories

Answer: 41.8

Explanation:

Acellus verified ✅

Explanation:

If the last electron enters the p-orbital after the electron configuration of the element, then that element is called the p-block element. The electron configuration of nitrogen(N) shows that the last electron of nitrogen enters the p-orbital. Therefore, nitrogen is the p-block element.

The volume of the balloon when it is fully cooled by my refrigerator will be 0.32L.

The volume of a substance can be calculated using the following expression;

Va/Ta = Vb/Tb

Where;

According to this question, a balloon is placed in a fridge that initially has a temperature of 220°C. The final volume will be;

0.5/493 = Vb/313

0.0010142 × 313 = Vb

Vb = 0.32 L

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The questions for the reaction between hydraulic acid and magnesium are as follows: depending on the reactant and outcome, is it a combo, decomposition, single replacement, triple replacement, or combustion.

Identification of the by products of component mixing will be aided by the second investigation. Based on the final products created, a reaction can be categorized as synthesis, decomposition, solo replacement, double renewal, or combustion.

will make it easier to determine how temperature affects reaction pace. We may classify a response as exothermic or absorption of heat based on how temperature affects it.

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Answer:

The answer to these are:

(A) 32

(B) If it is balanced 32

(C) 80

Explanation:

Based on the mole ratio of the reaction, the moles of N₂ that are produced is 13.89 moles of N₂.

The number of moles of N₂ that can be produced from 9.26 moles of NaN₃ is determined from the equation of the reaction.

The equation of the reaction is given below:

2 NaN₃ ----> 2 Na + 3 N₂

The mole ratio of NaN₃ to N₂ is 2 : 3

The moles of N₂that are produced = 9.26 * 3/2

The moles of N₂ that are produced = 13.89 moles.

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Answer:

6.022 X 1023 atoms

Explanation:

The molecules that are considered organic molecules from the following are \(C6H12O6\), CH4 and NaCl.

A) \(C6H12O6\) - This is an organic molecule. Organic molecules are molecules that contain carbon and hydrogen atoms, and this molecule contains both.

D) CH4 - This is also an organic molecule. It contains carbon and hydrogen atoms.

E) NaCl - This is not an organic molecule. It does not contain any carbon or hydrogen atoms.

An organic molecule is a molecule that contains carbon atoms. Carbon atoms can form strong bonds with other elements, allowing organic molecules to form a wide variety of complex structures. Carbon is the element that makes organic molecules unique, as it forms strong bonds with other elements and can form long chains of atoms. Organic molecules are the basis of all life on Earth, and are found in all living organisms.

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Taking into account the reaction stoichiometry, 2.405 moles of NaCl are formed when  127.49 grams of Na₂CO₂ reacts with excess of FeCl₃.

In first place, the balanced reaction is:

2 FeCl+ 3 Na₂CO₂ → Fe₂(CO₃)₃ + 6 NaCl

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:

The molar mass of the compounds is:

Then, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:

The following rule of three can be applied: if by reaction stoichiometry 318 grams of Na₂CO₂ form 6 moles of NaCl, 127.49 grams of Na₂CO₂ form how many moles of NaCl?

\(moles of NaCl=\frac{127.49 grams of Na_{2} CO_{2} x6 moles of NaCl }{318grams of Na_{2} CO_{2} }\)

moles of NaCl= 2.405 moles

Then, 2.405 moles of NaCl are formed when  127.49 grams of Na₂CO₂ reacts with excess of FeCl₃.

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The term "molar volume" (Vm) of an ideal gas refers to this amount. (STP) as 293 kelvin (K) of temperature and 1 atmosphere of pressure (P = 1 atm, which is also equal to 760 torr). Any ideal gas has a 22.4 L molar volume at STP.

The volume occupied through one mole of the a chemical element or chemical compound at a standard temperature and pressure (STP) is known as the molar volume (Vm). By dividing the mass density () by the molar mass (M), it can be computed.

One mole of any gas has the same volume when it is present at the same temperature and pressure. The volume that one mole of any gas occupies at standard pressure and temperature is known as the molar volume. 24 dm3 is equivalent to the molar volume (24,000 cm 3). In cases where it is necessary, this volume is provided.

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The volume of 0.555M KNO3 solution would contain 12.5 g of solute iss 223 mL.

The mass of solute in a given volume of solution is related by the formula below:

Therefore, volume of solution is given by:

Volume = Mass /molarity * molar mass

Molar mass of KNO₃ = 101 g/mol

Volume = 12.5/(0.555 * 101)

Volume = 0.223 L or 223 mL

In conclusion, the volume of the solution is obtained from the molarity of solution as well as mass and molar mass of solute.

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