Diamonds and graphite are both made of carbon atoms. Why do they have different properties?

Answer:

It indicates how fast reactants become products

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Answer: 3.98 x 10^-7

Explanation:

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Answer: yes

Explanation:

The claim that cold water boils faster than hot water is not true. The reason why this misconception may have emerged is likely due to a misunderstanding or misinterpretation of certain observations. However, there is no scientific evidence supporting this claim.

One possible reason for this misconception is the notion that hot water takes longer to reach its boiling point because it starts at a higher temperature. When comparing hot and cold water in terms of reaching the boiling point from room temperature, the cold water may appear to boil faster.

However, this is simply because the hot water has already gained a head start in terms of temperature. In reality, once both liquids reach their respective boiling points, the hot water will boil first.

Scientifically, the boiling point of water is determined by its temperature and pressure. Under normal atmospheric conditions, the boiling point of water is 100 degrees Celsius (212 degrees Fahrenheit). Heating water raises its temperature, and once it reaches 100 degrees Celsius, it transitions into the gaseous state. The initial temperature of the water does not affect the boiling point itself.

In conclusion, the claim that cold water boils faster than hot water is a misconception. It likely arose from a misinterpretation of observations, and there is no scientific evidence to support this claim. The boiling point of water is solely determined by its temperature and pressure, regardless of whether the water is initially hot or cold.

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The value of the following expression is 0.0429 rounded off to 0.043. The correct number of significant figures is 2.

The given expression (6.5 - 6.35) / 3.49  is calculated as below

(6.5 - 6.35) / 3.49

0.15 / 3.49

0.04297

0.043

Zeros to the left of the first non-zero digit are considered as not significant. For example 0.00765 has only 3 significant numbers.

When multiplying and dividing measured quantities, the output of the calculation should have the same number of significant figures as the measured quantity with the fewest significant figures. When performing multiple stage calculations, do not round intermediate stage calculation results; keep as many digits as is practical and round off only in the final output

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In terms of oxidation number, oxidation can be defined as the chemical change in which there occurs an increase in the oxidation number of an atom. Reduction may be defined as a chemical change in which there occurs a decrease in the oxidation number of an atom. The correct option is D.

An oxidizing agent is a substance which suffers a decrease in the oxidation number of one or more of its elements and a reducing agent is a substance which suffers an increase in the oxidation number of one or more of its elements.

In the reaction, oxidation state of 'Ca' increases from 0 to +2, so calcium is oxidized and acts as a reducing agent.

Thus the correct option is D.

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Answer:

It's True.

Explanation:

Matter is anything that has mass and takes up space. Mass gives an object the property of weight and inertia (resistance to change in the motion of an object). There are four states of matter, solid, liquid, gas, and plasma.

Answer:

B

Explanation:

Answer:

soft metal, reactive and with a low melting point, with a relative density of 0,97 at 20ºC (68ºF) for chlorine liquid and solid form it is a powerful oxidizing, bleaching, and disinfecting agent

Explanation:

According to the question the reaction enthalpy is thus 10610 J / 0.278 moles = 38.3 kJ/mol.

Enthalpy is a thermodynamic property of a system that measures the total energy content of a system. It is a state function that is expressed in terms of internal energy, pressure, and volume of a system. Enthalpy represents the amount of energy that is associated with a chemical reaction or physical change.

The reaction is exothermic, meaning that heat is released during the reaction. The amount of heat released can be calculated with the equation q = mcΔT, where q is the heat released, m is the mass of the solution, c is the specific heat capacity of the solution, and ΔT is the change in temperature of the solution. Using the given data, the amount of heat released by the reaction can be calculated as q = (250 g)(4.184 J/g-K)(11.1 K) = 10610 J. The enthalpy change for the reaction can then be calculated by dividing the heat released by the number of moles of NaOH, which is 11.1 g / 40.00 g/mol = 0.278 moles. The reaction enthalpy is thus 10610 J / 0.278 moles = 38.3 kJ/mol.

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Answer:

It determines the stability electric state of the atom

Explanation:

Now atoms are stable depending on the number of neutrons they have in their nuclei. If the no of electrons Equal no of protons then the atom is said to be neutral

bear in mind that neutrons have no charge so they don't affect the atom's electric state.

it's the neutrons that determines the atom's radioactive state

Explanation:

Unsaturated hydrocarbons have one or more double or triple bonds between carbon atoms. Those with double bond are called alkenes and those with one double bond have the formula CnH2n (assuming non-cyclic structures). ... Alkanes have the general formula CnH2n+2.

Answer:

If more than one double bond is present, indicate their position by using the number of the first carbon of each double bond and use the suffix -diene (for 2 double bonds), -triene (for 3 double bonds), -tetraene (for 4 double bonds), etc.

Explanation:

Explanation: The rate law for a chemical reaction is an equation that relates the rate of the reaction to the concentrations of the reactants. To determine the rate law for a reaction, experiments are typically conducted with different initial concentrations of the reactants and the initial rate of the reaction is measured.

From the data provided, it appears that the reaction is of the form X + Y → C. And the concentration of X and Y are varied in three trials and the corresponding Initial rate is measured.

In the first trial, [X] = 0.01 M and [Y] = 0.015 M, and the initial rate of the reaction is 7.83x10-5 M/s.

In the second trial, [X] = 0.01 M and [Y] = 0.03 M, and the initial rate of the reaction is 3.13x104 M/s.

In the third trial, [X] = 0.02 M and [Y] = 0.015 M, and the initial rate of the reaction is 1.57x10 M/s.

Given the data, the rate law for this reaction is OR = KX²M. This is because when the concentration of X is doubled, the rate of the reaction is quadrupled, which is consistent with a rate law of the form OR = k[X]^2.

\(HF \rightleftharpoons H^{+} + F^{-}\\\)

We have 1.5 M HF in the beginning and 0 M \(H^{+}\) and \(F^{-}\)

We know that there's gonna be a decrease of x M on \(HF\) and an increase of x M on \(H^{+}\) and \(F^{-}\).

We also find in chemistry tables that \(K_{a}(HF) = 6.8 \cdot 10^{-4}\)

\(K_a = \frac{[H^+] \cdot [F^-]}{[HF]}\\6.8 \cdot 10^{-4} = \frac{x \cdot x}{1.5 - x} \\6.8 \cdot 10^{-4} = \frac{x^2}{1.5}\\6.8 \cdot 10^{-4} \cdot 1.5 = x^2\\x^2 = 1.02 \cdot 10^{-3}\\x = 0.0319\\pH = -\log{0.0319}\\pH = 1.5\)

Potential energy depends on location to generate energy.

Potential energy is a type of stored energy that depends on how various system elements interact with one another. A spring's potential energy rises when it is compressed or expanded. A steel ball has more potential energy if it is raised above the ground as opposed to dropping to it. The more it is raised, the more work it is capable of. Instead of being a property of specific entities or particles, potential energy is a property of systems. For instance, the potential energy of the system composed of Earth and the raised ball increases as they move apart.

Systems with components whose configurations, or relative positions, affect the strength of the forces they apply to one another, create potential energy.

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If a reaction has a negative ΔG and a positive ΔS, the reaction will be spontaneous at all temperatures.

If a reaction is spontaneous at all temperatures, it implies that the reaction will occur without the need for any external intervention, such as the addition of energy. For a reaction to be spontaneous, it must satisfy the criteria of thermodynamic favorability, which is determined by the change in Gibbs free energy (ΔG) associated with the reaction.

The relationship between ΔG, temperature (T), and the equilibrium constant (K) of a reaction is described by the equation ΔG = ΔH - TΔS, where ΔH is the change in enthalpy and ΔS is the change in entropy.

To ensure spontaneity at all temperatures, two conditions must be met:

ΔG must be negative: A negative ΔG indicates a thermodynamically favorable reaction, meaning the products have a lower Gibbs free energy than the reactants. If ΔG is negative, the reaction will proceed spontaneously in the forward direction.

ΔS must be positive: A positive ΔS signifies an increase in the overall entropy of the system. Higher entropy means more disorder, and spontaneous reactions often involve an increase in randomness. When ΔS is positive, it can compensate for the enthalpic term, ΔH, allowing the reaction to proceed spontaneously.

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Answer:

Explanation:

Hess’s law derives directly from the law of conservation of energy, as well as its expression in the first law of thermodynamics. By Hess’s law, the net change in enthalpy of the overall reaction is equal to the sum of the changes in enthalpy for each intermediate transformation: ΔH = ΔH1+ΔH2+ΔH3.

Answer:

Explanation:

From the given information;

Using ideal gas equation:

pV = nRT

when n = 1 mol

\(V = \dfrac{RT}{p}\)

Initial molar volume = \(\dfrac{8.314 \ L.bar .k^{-1}.mol^{-1} \times 300 \ K}{1 \ bar}\)

Initial molar volume = 2494.2 L.mol⁻¹

Final molar volume = \(\dfrac{8.314 \ L.bar .k^{-1}.mol^{-1} \times 300 \ K}{3 \ bar}\)

Final molar volume = 831.4 L.mol⁻¹

The following are categorized into polar or nonpolar molecules:

a) Beryllium chloride (BeCl₂) is a nonpolar molecule. The Be-Cl bond is polar due to the electronegativity difference between beryllium and chlorine, but the molecule is linear with the two polar bonds pointing in opposite directions, resulting in a net dipole moment of zero.

b) Hydrogen sulphide (H₂S) is a polar molecule. The H-S bond is polar due to the electronegativity difference between hydrogen and sulfur, and the molecule has a bent shape, resulting in a net dipole moment that is not zero.

c) Sulphur trioxide (SO₃) is a nonpolar molecule. The S-O bonds are polar due to the electronegativity difference between sulfur and oxygen, but the molecule is trigonal planar with the three polar bonds pointing in different directions, resulting in a net dipole moment of zero.

d) Water (H₂O) is a polar molecule. The H-O bond is polar due to the electronegativity difference between hydrogen and oxygen, and the molecule has a bent shape, resulting in a net dipole moment that is not zero.

e) Trichloromethane (CHCl₃) is a polar molecule. The C-Cl bonds are polar due to the electronegativity difference between carbon and chlorine, and the molecule has a tetrahedral shape, resulting in a net dipole moment that is not zero.

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Answer:

Atoms are electrically neutral because they have equal numbers of protons (positively charged) and electrons (negatively charged).

Explanation:

Answer:

orange, light blue, and indigo are absorbed by hydrogen gas.

Answer:

blue

Explanation:

blue because it's the

I don't know how to put my statement but it's blue

Answer:

hello your question is incomplete below is the missing part of the question

answer : 104°c

Explanation:

The Eutectic temperature  for the mixture is 104°c

From the chart attached below it can be seen that the temperature from the two lines of best fit cross is 104°c

Types of luminous flames:

1. Yellow Luminous Flame

2. Smoky Luminous Flame

3. Orange Luminous Flame

4. Blue Luminous Flame

Luminous flames are characterized by their visible glow, which is caused by the incomplete combustion of fuel. The presence of soot particles in the flame causes the emission of light. There are different types of luminous flames, which can be classified based on their fuel composition and burning conditions. Here are some common types of luminous flames:

1. Yellow Luminous Flame: This is the most common type of luminous flame, often seen in open fires, candles, and gas stoves. It appears yellow due to the presence of soot particles in the flame. Yellow flames indicate incomplete combustion of hydrocarbon fuels, such as methane, propane, or natural gas. The high carbon content in these fuels leads to the formation of soot, which emits visible light.

2. Smoky Luminous Flame: This type of flame is characterized by a significant amount of black smoke and soot production. It is commonly observed in poorly adjusted or malfunctioning burners or engines. The excessive presence of unburned fuel in the flame results in incomplete combustion and the emission of dark smoke particles.

3. Orange Luminous Flame: An orange flame indicates a higher combustion temperature compared to a yellow flame. It is often seen in more efficient burners or when burning fuels with a higher carbon content, such as oil or diesel. The higher temperature helps in burning more of the carbon particles, reducing the amount of soot and making the flame appear less yellow.

4. Blue Luminous Flame: A blue flame is typically associated with complete combustion. It indicates efficient burning of fuel, resulting in minimal soot formation. Blue flames are commonly observed in gas burners or Bunsen burners. The blue color is a result of the combustion of gases, such as methane, in the presence of sufficient oxygen.

It's important to note that the luminosity of a flame can vary depending on factors such as fuel-air mixture, combustion temperature, and the presence of impurities. Achieving complete combustion and minimizing the production of soot is desirable for efficient and cleaner burning processes.

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Answer: true

Explanation: An atom does of a positively charged nucleus, surrounded by one or more negatively charged particles called electrons. The positive charges equal the negative charges, so the atom has no overall charge; it is electrically neutral. Protons and neutrons have nearly equal masses, but in a way they DO differ in charge.

The original function f(x) = 1/x becomes g(x) = 1/(x+4) - 3 after the transformation.

The correct transformation function that reflects a shift of 4 units to the left and 3 units down is g(x) = f(x+4) - 3.

This is because, in function notation, adding to the input value inside the function (x+4) shifts the function to the left, while subtracting from the output of the function (-3) shifts it down.

So, the original function f(x) = 1/x becomes g(x) = 1/(x+4) - 3 after the transformation.

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Answer:

compounds ok I think I can't anderstand good

Answer:

If n = 4, then the possible values of 1 and m depend on the equation or expression being used. Without more information, it is impossible to determine what the possible values of 1 and m might be. Can you please provide more context or information about the problem you are trying to solve?

The mass of the asteroid is C. 1.2 x \(10^{12}\) Kg

To find the mass of the other asteroid, we can rearrange the equation for the gravitational force between two objects:

F = (G * m1 * m2) / \(r^{2}\)

where F is the force of gravity, G is the gravitational constant, m1 and m2 are the masses of the two asteroids, and r is the distance between them.

Given that the distance between the asteroids is 75000 m, the force of gravity between them is 1.14 N, and one asteroid has a mass of 8 x \(10^{7}\) kg, we can substitute these values into the equation and solve for the mass of the other asteroid (m2):

1.14 N = (6.67430 × \(10^{-11}\) N \(m^{2}\)/\(Kg^{2}\) * 8 x \(10^{7}\) kg * \(m2\)) / \((75000 m)^{2}\)

Simplifying and solving the equation, we find that the mass of the other asteroid (m2) is approximately 1.2 x \(10^{12}\) kg. Therefore, Option C is correct.

The question was incomplete. find the full content below:

Two asteroids are 75000 m apart one has a mass of 8 x \(10^{7}\) kg if the force of gravity between them is 1.14 what is the mass of the asteroid

A. 3.4 x \(10^{11}\) kg

B. 8.3 x \(10^{12}\) kg

C. 1.2 x \(10^{12}\) kg

D. 1.2 x \(10^{10}\) kg

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