classify each reaction as spontaneous or nonspontaneous. drag the appropriate items to their respective bins. view available hint(s)

Answer: the horizontal line in a heating curve represents a change in state (second option or letter B)

Explanation:

The question requires us to identify what a horizontal line represents in a heating curve.

A heating curve in chemistry corresponds to a graph where the temperature is plotted on y axis agains the heat absorbed (or time) on the x axis, and it represents the behavior of a substance in terms of the states of matter when the temperature and heat (over time) changes.

For example, we can represent the heating curve of water as in the following image:

Note that the temperature where the line stays horizontal corresponds to the change of state of water (melting at 0°C and boiling at 100°C), while the other regions of the graph corresponds to where the water in its solid, liquid or gas form is absorbing heat and increasing the temperature.

Considering the information above, we can say that the horizontal line in a heating curve represents a change in state (second option or letter B).

The reaction rate is proportional to the square of the amount of reactant, so the rate will increase by a factor of the square of 2.81 is 7.8961

The rate of reaction is the speed at which reaction proceed and it often expressed in term to either the concentration of product that is formed in a unit of time or the concentration of reactant that is consumed in a unit of time and formula is  concentration of any reactant or product as [reactant] or [product] so the concentration A can be represented as [A] and that of B as [B]

Here given data is

0.450/0.160=2.81 , the second reaction contains 2.81 times the amount of reactant compared to Reaction 1

Then square of 2.81 is (2.81)² = 7.8961

So the rate will increase by a factor of the square of 2.81 is 7.8961

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This is sulfer, sulfer is the atom with 16 protons, neutrons and electrons.

Answer:

Physical science, in turn, can be divided into chemistry and physics. Chemistry is the study of matter and energy at the scale of atoms and molecules. ... Physics is the study of matter and energy at all scales—from the tiniest particles of matter to the entire universe but i dont really know if there is new information to discover

Explanation:

hope it help and if it doesnt sorry ;)

Answer: Because

Explanation:

The energy found in the reactants remains in the system, and the reactants also take energy from the surroundings.

The choice of solution has a concentration of 1.144 mol/kg molality.

Molarity corresponds to the moles of solvent divided by the amount of solution in litres, whereas molality is equal with the moles of solvent divided by the quantity of solvent in kilogrammes.

Since 1 mole of solute is present in 1 litre for the solution, which contains both the solute and the solvent, 1 molar aqueous solutions are more concentrated than one decays aqueous solutions.

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Answer:

No

Explanation:

Answer:

no its mass is consistent and never changes but its weight would

Answer:

A logic bomb and a time bomb are both types of malicious software or code that are designed to cause harm to a computer system or network. Here's a brief explanation of each:

Logic Bomb:

A logic bomb is a piece of code or software that is intentionally inserted into a system to execute a malicious action when specific conditions are met. It remains dormant until triggered by a predefined event or circumstance, such as a specific date, time, or user action. Once triggered, the logic bomb may perform various harmful actions, such as deleting files, corrupting data, or disrupting system functionality. The purpose of a logic bomb is often to cause damage or to gain unauthorized access to a system.

Time Bomb:

A time bomb is similar to a logic bomb, but it is specifically designed to activate or execute its malicious payload at a certain date or time. It is usually programmed to remain undetected until the predetermined time arrives. The time bomb can be set to trigger after a specific time period or on a particular date, at which point it may carry out destructive actions. Time bombs can be used by attackers to target specific events or to coordinate an attack to occur simultaneously across multiple systems.

Both logic bombs and time bombs are considered forms of malicious code or malware and are used with malicious intent to disrupt, damage, or compromise computer systems or networks. They can be extremely harmful, and it is important to have strong security measures, such as antivirus software and regular system updates, to protect against such threats.

Explanation:

Active transport requires energy to transport the molecules across the cell membrane. Thus, Option A is correct.

Active transport is the transport of molecules from a lower concentration to a higher concentration across the cell (plasma) membrane. As this process is against the concentration gradient, it requires cellular energy to transport the molecules or ions. Active transport involves Primary active transport and secondary active transport.

Passive transport involves the movement of molecules from a higher to lower concentration gradient and thus does not require energy and is slower than active transport.

Therefore, only active transport requires energy for the transportation of molecules across the cell membrane.

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Answer:

The ocean currents are too strong by the Amazon River to form deltas.

Explanation:

The Atlantic has sufficient wave and tidal energy to carry most of the Amazon's sediments out to sea, thus the Amazon does not form a true delta. The great deltas of the world are all in relatively protected bodies of water, while the Amazon empties directly into the turbulent Atlantic.

Answer:

Br-CH2-CH(CH3)2-C(Cl)H-CH(CH3)2-CHO

Explanation:

The molecule has a total of 14 carbon atoms, 13 hydrogen atoms, and 1 bromine atom. The carbon atoms are arranged in a chain with a methyl group attached to the second carbon atom, a chlorine atom attached to the third carbon atom, and two methyl groups attached to the fourth carbon atom. The fifth carbon atom has a carbonyl group attached to it.

The molecule is an aldehyde, which means that it has a carbonyl group (C=O) at the end of the chain. The carbonyl group is polar, and the oxygen atom has a partial negative charge. The hydrogen atom has a partial positive charge. This polarity makes the aldehyde group susceptible to nucleophilic attack.

The bromine and chlorine atoms are both electrophilic, which means that they have a partial positive charge. This makes them susceptible to nucleophilic attack.

The methyl groups are non-polar and do not have any significant reactivity.

The molecule is a chiral molecule, which means that it has a mirror image that is not superimposable on itself. This is because the carbon atom with the carbonyl group is attached to four different groups.

The molecule is a liquid at room temperature and has a strong odor. It is used in a variety of products, including perfumes, flavorings, and plastics.

The missing component in the nuclear equation \(\frac{209}{84} Po\\\) → \(\frac{205}{82}Pb\) + X is predicted to be \(\frac{4}{2} He\).

This nuclear reaction is form of an alpha decay process. In this alpha decay process, the nucleus gets decayed through the release of an alpha particle. The mass number of the nucleus is decreased by 4 units and atomic number of the nucleus is also reduced by 2 units. The particle which is released is nucleus of helium.

The general equation which represents the alpha decay process is -

\(\frac{A}{Z} X\) → \(\frac{A-4}{Z-2} Y\) + \(\frac{4}{2} \alpha\)

The nuclear equation is -

\(\frac{209}{84}Po\) → \(\frac{205}{82} Pb\) + X

We will balance the reaction and we have to remember in balancing the nuclear equation is that the sums of the superscripts and the subscripts has to be the same on both sides of the equation.  

Sum of superscripts : 210 = 206 + y,

                                   so, y =4.  

Sum of subscripts : 84 = 82 + x,

                                    so, x = 2.

Therefore, the nuclear equation is -

\(\frac{209}{84} Po\) → \(\frac{205}{82} Pb\) + \(\frac{4}{2} He\)

Hence, the missing component is \(\frac{4}{2} He\).

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The combined gas law equation is:

(P1 * V1) / (T1) = (P2 * V2) / (T2)

The volume of the gas at 30 °C is approximately 760.67 mL.

To determine the volume of the gas at 30 °C, we can use the combined gas law equation, which relates the initial and final conditions of temperature and volume for a gas.

The combined gas law equation is:

(P1 * V1) / (T1) = (P2 * V2) / (T2)

Where:

P1 and P2 are the initial and final pressures, respectively

V1 and V2 are the initial and final volumes, respectively

T1 and T2 are the initial and final temperatures in Kelvin, respectively

We need to convert the temperatures from Celsius to Kelvin by adding 273.15 to each value.

Given:

V1 = 550 mL

T1 = -55 °C = 218.15 K

T2 = 30 °C = 303.15 K

Assuming the pressure remains constant, we can rearrange the equation to solve for V2:

V2 = (P1 * V1 * T2) / (P2 * T1)

Since the pressure is not specified in the problem, we can assume it remains constant, allowing us to cancel out the pressure terms. Thus, the final equation becomes:

V2 = (V1 * T2) / T1

Plugging in the given values:

V2 = (550 mL * 303.15 K) / 218.15 K

Simplifying the calculation, we find:

V2 ≈ 760.67 mL

Therefore, the volume of the gas at 30 °C is approximately 760.67 mL.

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Answer:

Female

Explanation:

Answer: A. Female.

Explanation: The word 'heroine' means a female or a woman that is admired and looked upon for her courage, bravery, and noble qualities.

The reaction SO\(_2\)Cl\(_2\)(g) → SO\(_2\)(g) + Cl\(_2\) (g) is first order in SO\(_2\)Cl\(_2\). Using the given kinetic data, 2.18×10⁻⁵ s⁻¹ is the magnitude and units of the first-order rate constant.

The chemical kinetics rate law, which connects the molar reactant concentration with reaction rate, uses the rate constant as a proportionality factor. The letter k in an equation designates it, which is also referred to as either the reaction rate constant as well as reaction rate coefficient.

Using molar concentrations of something like the reactants as well as the sequence of the reaction, the rate constant can be calculated experimentally. As an alternative, the Arrhenius equation may be used to compute it.

lnPo/Pt=Kt

ln 1/0.947=K×(2500)

k = 2.18×10⁻⁵ s⁻¹

Therefore,  2.18×10⁻⁵ s⁻¹ is the magnitude and units of the first-order rate constant.

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Your question is incomplete but most probably your full question was,

The reaction SO\(_2\)Cl\(_2\)(g) → SO\(_2\)(g) + Cl\(_2\) (g) is first order in SO\(_2\)Cl\(_2\). Using the following kinetic data, determine the magnitude of the first order rate constant

Time (s)                                     Pressure

2500                                         0.947

5000                                         0.895

7500                                            0.848

Answer:

To resolve this, we need to place the coefficient “2” in front of the sodium in the reactant, to give the equation shown below. 2 Na (s) + Cl 2 (g) → 2 NaCl (s) In this equation, there are two sodiums in the reactants, two sodiums in the products, two chlorines in the reactants and two chlorines in the products; the equation is now balanced.

Explanation:

Answer:

c. The waves from the speaker are mechanical waves.

d. The frequency or amplitude of the waves could change.

g. The speaker does not change the wave type.

These statements are true. The waves that come out of the speaker are mechanical waves, meaning they require a medium to travel through, such as air or water. The frequency and amplitude of the waves could change, depending on the characteristics of the sound being played through the speaker. The speaker does not change the type of wave from mechanical to electromagnetic, or vice versa.

Answer:

Acidic solutions are measured to have lower pH values than basic or alkaline solutions.

Explanation:

So basically acids have a lower pH than other liquids like water.

The adsorbed energy helps in heat the absorption. In the animation, the purple arrows represent energy that is being absorbed from the water

It is a way of making a movie from many still images. The images are put together one after another, and then played at a fast speed to give the illusion of movement.

Someone who makes animations is called an animator.

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1. No. 108 g of Ag has a lower number of atoms than 80 g of Ca.

2. The gram of \(SO_3\) in 3 moles of the compound would be 240 g.

3. 1.20 x \(10^{24\) atoms

4. The grams of hydrogen in 3.6 x \(10^{24\) molecules of \(NH_3\) would be 18 grams.

According to Avogadro, 1 mole of a substance contains 6.022 x \(10^{23\) molecules or atoms.

Recall that: mole = mass/molar mass

1. 108 g of Ag would be equivalent to: 108/108 = 1 mol.

80 g of Ca would be equivalent to: 80/40 = 2 mol

Since 1 mol is equivalent to 6.022 x \(10^{23\) molecules or atoms, it means 80 g of Ca has twice as atoms as 108 g of Ag.

2. 3 mol sample of \(SO_3\) would be equivalent to: 3 x 80 = 240 g

3. 124 g of \(Na_2O\) would be equivalent to: 124/62 = 2 mol

Number of atoms = 2 x 6.022 x \(10^{23\)

                              = 1.20 x \(10^{24\) atoms

4. 3.6 x \(10^{24\) molecules of \(NH_3\) would be equivalent to:

  3.6 x \(10^{24\)/6.022 x \(10^{23\) = 6 mol of \(NH_3\)

\(NH_3 --- > 3H^+ + N^{3-\)

From the above equation, 1 mole of \(NH_3\) produces 3 moles of hydrogen.  Thus,  6 moles of  \(NH_3\) would be equivalent to 18 moles of hydrogen.

18 moles of hydrogen = 18 x 1

                                    = 18 g

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The covalent bond is present in the compound C₃H₈. The reactant C is 3, product C is 6, reactant H is 8, product H is 10, Reactant O is 2, product O is 9.

What is covalent bond ?

Atoms share electron pair between them in covalent bonds. H-H or C-H are examples of nonpolar covalent bonds between atoms with similar or identical electronegativity, whereas polar covalent bonds are formed when unequal electronegativity is shared between atoms (e.g., H–O).

What is reactant ?

Raw materials known as reactants combine to create products. When the right factors, such as temperature, time, or pressure, come into play, the chemical bonds between the reactants are broken, allowing the atoms to form new bonds that lead to various combinations.

Therefore, covalent bond is present in the compound C₃H₈. The reactant C is 3, product C is 6, reactant H is 8, product H is 10, Reactant O is 2, product O is 9.

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The volume of carbon dioxide produced is approximately (d) 11.9 liters.

To determine the amount of carbon dioxide (C\(O_2\)) produced when 37.8 grams of carbon disulfide (C\(S_2\)) reacts with excess oxygen gas (\(O_2\)), we need to use stoichiometry and the given balanced chemical equation:

C\(S_2\)(l) + 3\(O_2\)(g) → C\(O_2\)(g) + 2S\(O_2\)(g)

First, we calculate the number of moles of C\(S_2\) using its molar mass:

Molar mass of (C\(S_2\)) = 12.01 g/mol (C) + 32.07 g/mol (S) × 2 = 76.14 g/mol

Number of moles of (C\(S_2\)) = mass / molar mass = 37.8 g / 76.14 g/mol ≈ 0.496 mol

From the balanced equation, we can see that the stoichiometric ratio between (C\(S_2\)) and C\(O_2\) is 1:1. Therefore, the number of moles of C\(O_2\) produced will also be 0.496 mol.

Now we can use the ideal gas law to calculate the volume of C\(O_2\) at the given temperature and pressure. The ideal gas law equation is:

PV = nRT

where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant (0.0821 L·atm/mol·K), and T is the temperature in Kelvin.

Converting the temperature from Celsius to Kelvin:

T(K) = 28.85°C + 273.15 = 302 K

Using the ideal gas law:

V = nRT / P = (0.496 mol) × (0.0821 L·atm/mol·K) × (302 K) / (1.02 atm) ≈ 11.9 L

The correct answer is 11.9 liters.

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The speed that reflects the average kinetic energy of the molecules is known as the root-mean-square speed. using N2 at 25 °C.

The square root of temperature and the square root of the molar mass are both exactly proportional to the rms velocity. Thus, doubling the rms velocity of the molecules when the temperature of a specific gas is quadrupled.

The root mean square velocity of gaseous hydrogen molecules equals that of oxygen molecules at 47°C at what temperature.

A gas will effuse more quickly the lighter it is; conversely, the heavier a gas is ,the slower it flows, the more. Helium (He) will have the highest rate of effusion since it has the lowest molecular weight (atomic weight, in this example).

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The enthalpy of the reaction is -164 kJ/mol.

We know that the reaction that occurs between the chromium metal and the acid is an exothermic reaction thus there is an increase in the temperature of the system.

Number of moles of the silver nitrate solution is obtained from;

Volume * concentration

500/1000 L * 0.915 M = 0.46 moles

We can now assume that the density of the solution is 1 g/mL hence the mass of the solution is 500g. Let the specific heat capacity of the solution be 4.18 J/Kg/°C.

Then;

H = mcdT

H = Heat lost in the reaction

m = mass of the solution

c = specific heat capacity

dT = temperature change

H = 500 * 4.12 * ( 55.9 - 19.3)

= 75.4 kJ

The heat of reaction = 75.4 kJ/0.46 moles

= -164 kJ/mol

Let us recall that the negative simply means that heat was lost in the reaction.

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The measure of the length of events and the duration of intervals between events is time.

The duration of events or the gaps between them can be measured, compared, or even ordered using time. The lengthy period of time that the Earth's geologic history takes up is known as geologic time. Starting at the beginning of the Archean Eon  formal geologic time runs until the present. Geology is defined as the "Science of the Earth."

Geology is the fundamental Earth science that examines how the earth created, its structure and composition, and the various forces acting on it. It is sometimes known as geoscience or earth science.

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Potassium citrate (also known as tripotassium citrate) is a potassium salt of citric acid with the molecular formula K3C6H5O7.