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True

False

Answer:

the reactor was overheating

The standard reduction potential of the Cr³+/Cr electrode is -0.46V. None of the option is correct.

To determine the standard reduction potential of the Cr³+/Cr electrode, we can use the Nernst equation, which relates the standard reduction potential to the cell potential under non-standard conditions. The Nernst equation is given by:

E = E° - (0.0592/n) * log(Q)

where E is the cell potential, E° is the standard reduction potential, n is the number of electrons transferred in the half-reaction, and Q is the reaction quotient.

In this case, we have the standard potential of the cell as −0.60V. We know that the standard reduction potential of the Sn/Sn²+ electrode is -0.14V. Therefore, the reduction potential of the Cr³+/Cr electrode can be calculated as:

E = -0.60V - (-0.14V)

E = -0.60V + 0.14V

E = -0.46V

Therefore, the standard reduction potential of the Cr³+/Cr electrode is -0.46V.

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The amount of heat energy produced when 1 g of hydrogen and 2 g of nitrogen are reacted, is -6.61 KJ

First, we shall obtain the limiting reactant. Details below:

3H₂ + N₂ -> 2NH₃

From the balanced equation above,

28 g of N₂ reacted with 6 g of H₂

Therefore,

2 g of N₂ will react with = (2 × 6) / 28 = 0.43 g of H₂

We can see that only 0.43 g of H₂ is needed in the reaction.

Thus, the limiting reactant is N₂

Finally, we the amount of heat energy produced. Details below:

3H₂ + N₂ -> 2NH₃ ΔH = -92.6 KJ

From the balanced equation above,

When 28 grams of N₂ reacted, -92.6 KJ of heat energy were produced.

Therefore,

When 2 grams of N₂ will react to produce = (2 × -92.6) / 28 = -6.61 KJ

Thus the heat energy produced from the reaction is -6.61 KJ

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Based on the data shown in the graph, the rate of reaction is directly proportional to the temperature of a reaction.

The speed at which a chemical reaction occurs is called the reaction rate or rate of reaction. The rate of a reaction is proportional to the increase in product concentration per unit time and the decrease in reactant concentration per unit time.

The rate of a reaction is affected by the following:

the temperature of the reaction - the rate of reaction is directly proportional to the temperature of a reaction. Hence, the rate of a reaction increases with an increase in temperature.

presence of a catalyst - the rate of a reaction increases with the addition of a catalyst. A catalyst speeds up the rate of a reaction.

the surface area of the reactants - the rate of a reaction increases with an increase in the surface area of the reactants,

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Answer:

At higher temperatures, chemical reactions occur more quickly.

Explanation:

edmentum

J.J. Thomson discovered electrons and their negative charge through the cathode ray experiment, leading to the development of the plum pudding model of the atom.

J.J. Thomson, a British physicist, was the first to discover electrons in 1897.

He conducted the cathode ray experiment to identify the negatively charged particles.

The cathode ray tube is a vacuum-sealed glass tube with two electrodes at each end: a cathode and an anode.

When a high voltage electrical current is applied to the electrodes, the tube glows, indicating that the cathode rays are being emitted from the cathode and traveling through the tube towards the anode.

The cathode rays were found to have a negative charge, according to Thomson.

These rays were identified as particles by the presence of a magnet, which caused the particles to bend in the direction opposite to the magnet's polarity.

This discovery indicated that the particles had a charge on them because they were deflected by the magnetic field, which is only possible if the particles have an electric charge.

Thomson further concluded that these particles were about 1,000 times smaller than hydrogen atoms because of the degree of deflection they experienced in the magnetic field.

Furthermore, Thomson created the plum pudding model of an atom, in which electrons are dispersed throughout a positively charged matrix, based on his findings.

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Cu + O2 --->  CuO2 -The first reaction is a combustion reaction

2 HCl + Mg → H2 + MgCl2- The second reaction is a Single replacement reaction

A combustion reaction is a type of chemical reaction that occurs between a fuel and an oxidizer in the presence of heat or light, resulting in the release of energy in the form of heat and light.

In other words, it is a reaction in which a substance reacts with oxygen to produce heat and light.

Combustion reactions are important in many aspects of daily life, including the burning of fossil fuels for energy production, the combustion of wood or other materials for heating or cooking, and the combustion of fuels in internal combustion engines.

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There are 2.64 × 1022 molecules of sucrose present in this serving of fruit dessert containing 15.0 g of sugar.

To determine the number of molecules of sugar present in the serving, we need to calculate the number of moles of sugar and then convert it to the number of molecules.

Given:

Mass of sugar (sucrose) = 15.0 g

Molar mass of sucrose (C12H22O11) = 342 g/mol

First, calculate the number of moles of sugar using the formula:

Number of moles = Mass of substance / Molar mass

Number of moles of sugar = 15.0 g / 342 g/mol ≈ 0.0439 mol

Next, we use Avogadro's number, which states that there are approximately 6.022 × 10^23 molecules in one mole of a substance. Therefore, to find the number of molecules of sugar:

Number of molecules = Number of moles × Avogadro's number

Number of molecules of sugar = 0.0439 mol × 6.022 × 10^23 molecules/mol ≈ 2.64 × 10^22 molecules

Therefore, there are approximately 2.64 × 10^22 molecules of sugar present in this serving.

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Answer:

2232.5 joules/gm

Explanation:

The specific heat of water and steam (water vapor) are 4.18

J/gºC and 2.10 J/gºC respectively. If 127 kJ of heat is need to

heat a 54.0 g sample of water from 74.20 °C to water vapor at

105.50 °C, what is the heat of vaporization of water in J/g?

Assume the boiling point of water is 100.00 °C.

we have to raise 54.0 gm of water from  74.20 °C  to  100.00 °C,  it will cost

4.18 X54 X (100-74.20) =4.18 X 54 X 25.8 = 5823.6 joules.

once we vaporize the water, we raise the temperature from 100.00  to 105.50C.  this will cost 54 X 2..1 X (105.5  -  100.00)  = 54 X 2.1 X 5.5 =

623.7 joules.

the total thermal cost of the whole process from water at 74.20 °C to steam

at 105.5 °C is 127,000 joules

the cost for vaporizing 54...0 gm of 100.00 °C. liquid water to steam is

127,000 joules  - 623.7 joules  -5823.6 joules =  120552.7 joules

54.0 gm, therefor the heat o vaporize water per gram is

120552.7/54 = 2232.5 joules/gm

The geometry around the carbon for sp3 hybridized atom is tetrahedral. The geometry around the carbon for sp2 hybridized atom is planar triangular. The geometry around the carbon for sp hybridized atom is linear.

Before overlapping with 1s orbital of hydrogen, first the atomic orbitals of carbon undergoes hybridization to form hybrid orbitals. The hybrid orbitals involve in bond formation with hydrogen. Hence, the geometry around each carbon atom in the molecule depends on the type of hybridization it undergoes.

The geometry around the carbon for sp3 hybridized atom is tetrahedral. The geometry around the carbon for sp2 hybridized atom is planar triangular. The geometry around the carbon for sp hybridized atom is linear.

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Complete question:

Below is a 3D representation of a cyclohexane (C6H12) molecule! a cyclic compound used in the manufacture of nylon and found in the distillation of petroleum. What is the molecular geometry around each carbon atom? Be sure to rotate the molecule to see all atoms.

Answer:

C

Explanation:

similar physical properties

Answer:

one from each parent

Explanation:

The reaction order and specific reaction rate constant can be determined by performing the kinetics experiment on irreversible polymerization A. Kinetic experiments can be used to investigate the rate and mechanism of chemical reactions. Chemical kinetics is the study of chemical reactions' speed and pathway.

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\(\begin{gathered} {\underline{\boxed{ \rm{\red{Mass \: = \: Density × Volume}}}}}\end{gathered} \)

\(\large\bf\blue{ \diamond} \: \rm \: \: 30 \: \times \: 2 \\ \\ \large\bf\blue{ \diamond} \: \rm \: 60 \: kg\)

Mass of object is 60 kg

The sample of the liquid has more energy than the sample of solid. Hence, option B is correct.

Thermal energy refers to the energy contained within a system that is responsible for its temperature.

The particles in the liquid are the same as in the solid but they have more energy. To melt solid energy is required to overcome the attraction between the particles and allow them to pull them apart. The energy is provided when the solid is heated up.

Hence, option B is correct.

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70 tons of hematite (Fe₂O₃) is needed to produce 49 tons of iron (Fe).

We'll begin by calculating the tons of hematite (Fe₂O₃) that reacted and the tons of Fe produced from the balanced equation. This is illustrated below:

2Fe₂O₃ + 3C —> 4Fe + 3CO₂

Molar mass of Fe₂O₃ = (56×2) + (16×3) = 160 g/mol

Mass of Fe₂O₃ from the balanced equation = 2 × 160 = 320 g

Divide by 907185 to express in ton

320 / 907185 = 0.000353 ton

Molar mass of Fe = 56 g/mol

Mass of Fe from the balanced equation = 56 × 4 = 224 g

Divide by 907185 to express in ton

224 / 907185 = 0.000247 ton

From the balanced equation above,

0.000353 ton of Fe₂O₃ reacted to produce 0.000247 ton of Fe.

Finally, we shall determine the tons of hematite (Fe₂O₃) needed to produce 49 tons of Fe. This can be obtained as follow:

From the balanced equation above,

0.000353 ton of Fe₂O₃ reacted to produce 0.000247 ton of Fe.

Therefore,

X ton of Fe₂O₃ will react to produce 49 tons of Fe i.e

X ton of Fe₂O₃ = \(\frac{0.000353 * 49}{0.000247} \\\\\)

X ton of Fe₂O₃ = 70 tons

Thus, 70 tons of hematite (Fe₂O₃) is needed to produce 49 tons of Fe.

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Answer:

Potassium  

Explanation:

Answer:

I don't think that answer is right. I got 543.04 grams.

Explanation:

I think the question is asking for grams in the samlpe instead of the moles in the sample because it already gives you the amount of moles.

Answer:

C. Gases

Explanation:

A gas is matter that has no definite shape or volume. The particles are far apart and move freely. In a gas, particles move much faster and the attractive forces are weaker than the attractive forces in a liquid and a solid.

Answer:

a t o m i c w e i h g t

B

Explanation:

Answer:

A. 488.31 mL.

B. 67.22 mL.

Explanation:

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

Initial volume (V₁) = 250 mL

Initial pressure (P₁) = 752 mm Hg

A. Determination of the new volume when the pressure is lowered to 385 mmHg.

Initial volume (V₁) = 250 mL

Initial pressure (P₁) = 752 mm Hg

Final pressure (P₂) = 385 mmHg

Final volume (V₂) =?

P₁V₁ = P₂V₂

752 × 250 = 385 × V₂

188000 = 385 × V₂

Divide both side by 385

V₂ = 188000 / 385

V₂ = 488.31 mL

Thus, the new volume of the gas is 488.31 mL

B. Determination of the new volume of the gas when the pressure is increased to 3.68 atm.

Initial volume (V₁) = 250 mL

Initial pressure (P₁) = 752 mm Hg

Final pressure (P₂) = 3.68 atm.

Final volume (V₂) =?

Next, we shall convert 3.68 atm to mmHg. This can be obtained as follow:

1 atm = 760 mmHg

Therefore,

3.68 atm = 3.68 atm × 760 mmHg / 1 atm

3.68 atm = 2796.8 mmHg

Thus, 3.68 atm is equivalent to 2796.8 mmHg.

Finally, we shall determine the new volume of the gas as follow:

Initial volume (V₁) = 250 mL

Initial pressure (P₁) = 752 mm Hg

Final pressure (P₂) = 2796.8 mmHg.

Final volume (V₂) =?

P₁V₁ = P₂V₂

752 × 250 = 2796.8 × V₂

188000 = 2796.8 × V₂

Divide both side by 2796.8

V₂ = 188000 / 2796.8

V₂ = 67.22 mL

Thus, the new volume of the gas is 67.22 mL

Answer:

9

Explanation:

Answer:

HCl + AgNO3 ------ AgCl + HNO3

Explanation:

HCl is an acid called hydrochloric acid, while AgNO3 is a base called Silver Nitrate.

Hope it helps.

For cigarette lighters containing liquid butane, C4H10, the quantity of heat produced  is mathematically given as

q= -49.2 KJ

Generally, the equation for the Chemical reaction   is mathematically given as

C₄H₁₀(l) + 6.5 O₂(g)---->4 CO₂(g) + 5 H₂O(l)

Therefore

dH°r = .(-393.5 ) + 5.(-285.5] - [1.(-147.6 )+6.5.

dH°r = -2853.9 kJ/mol

In conclusion, No.of mole

Nm = 1g/58g/mol

Nm= 0.01724mol

Hence, Heat of combustion

q = dH°r x moles

q = -2853.9 ×0.01724

q= -49.2 KJ

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Answer:

ikr

Explanation:

‍♂️ it's really sad

Answer:

sometimes the female doesn't want to be hurt, or it could be from the last relationship she was in. maybe just maybe the female feels like you are using her for her body or just to use her. Sometimes females want to stop the heartache before it begins. Tbh we all have different reasons for it.

Explanation:

The central idea is despite publicity surrounding private space missions, NASA remains optimistic that it will be the first agency to send humans to Mars.

This is referred to as National Aeronautics and Space Administration and are involved in the science and technology related to space.

The article talks about publicity of  private space missions and NASA being optimistic about being the first to achieve the feat of sending humans to Mars.

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Chemistry =>Chemical Reactions => Balancing equations

We have the oxidation of iron in the equation.

To balance the equation we must start by counting the atoms of each element on both sides of the reaction.

We will balance the oxygen. We have 2 atoms of oxygen on the reactants. So we write coefficient 2 on the FeO molecule.

Now, we balance the iron. We have 2 Fe atoms, so we write the coefficient 2 on the Fe molecule. We have:

Now, the equation of the reaction is balanced.

Answer: 2Fe + O2 →2FeO

Answer: The number of neutrons for a given element is the only number that can change and still have the identity of the element stay the same, (because the atomic number is the number of protons). In this case the mass number would be 11.

Hope this helps...... Stay safe and have a Merry Christmas!!!!!! :D

Answer:

\(\large \boxed{5.1}\)

Explanation:

1. Initial concentrations of reactants

[SO₂] = (3.8 mol)/(75 L) = 0.0507 mol·L⁻¹

 [O₂] = (7.0 mol)/(75 L) = 0.0933 mol·L⁻¹

2. Equilibrium concentration of SO₃

[SO₃] = (1.5 mol)/(75 L) = 0.0200 mol·L⁻¹

3. Set up an ICE table

                      2SO₂     +      O₂     ⇌     2SO₃

I/mol·L⁻¹:     0.0507         0.0933             0

C/mol·L⁻¹:        -2x                -x                +2x

E/mol·L⁻¹:   0.0507-2x    0.0933-x           2x

4. Calculate x

We know the final concentration of SO₃ is 0.0200 mol·L⁻¹, so

2x = 0.0200

x = 0.0100

5. Find the final concentrations of the reactants

Insert the numbers into the ICE table.

                      2SO₂     +       O₂     ⇌     2SO₃

I/mol·L⁻¹:     0.0507         0.0933             0

C/mol·L⁻¹:    -0.0200       -0.0100      +0.0200

E/mol·L⁻¹:     0.0307         0.0833        0.0200

6. Calculate K

\(K_{\text{eq}} = \dfrac{\text{[SO$_{3}$]}^{2}}{\text{[SO}_{2}]^{2}\text{[O$_{2}$]}} = \dfrac{0.0200^{2}}{0.0307^{2}\times0.0833} =\mathbf{5.1}\\\\\text{The value of the equilibrium constant is $\large \boxed{\mathbf{5.1}}$}\)

Explanation:

It is the emission of electron from a metal under the effect of light is known as photo electric effect

I hope this imformation help full for you