Potassium chlorate (KClO3) will decompose to potassium chloride (KCl) and oxygen (O2) in the reaction shown:

2KClO3(s) → 2KCl(s) + 3O2(g)

A chemist allows 20.0 grams of KClO3 to decompose and captures 6.7 grams of O2 as a
result.

According to the stoichiometry of the given chemical equation, 37 grams of phosphorus trichloride will be formed upon a complete reaction of 28.7 g of chloride gas with excess phosphorus.

It is the determination of proportions of elements or compounds in a chemical reaction. The related relations are based on law of conservation of mass and law of combining weights and volumes.

Stoichiometry is used in quantitative analysis for measuring concentrations of substances present in the sample.

426 g chlorine gives 549.32 g PCl₃ thus for 28.7 g chlorine will give 28.7×549.32/426=37 g.

Thus,37 grams of phosphorus trichloride will be formed upon a complete reaction of 28.7 g of chloride gas with excess phosphorus.

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A process which involves the addition of oxygen is an oxidation reaction and the process which involves the removal of oxygen is a reduction reaction. Here the given reaction is a redox reaction.

The chemical reactions which involves both oxidation and reduction are known as redox reactions. An oxidizing agent is a substance which can accept one or more electrons whereas the reducing agent is a substance which can give one or more electrons.

The given reaction is represented as:

2Al (s) + Cr₂O₃ (s) → 2Cr (s) + Al₂O₃ (s)

The oxidation reaction is:

2Al³⁺ → 2Al + 6e⁻

The reduction reaction is:

2Cr³⁺ + 6e⁻ → 2Cr

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The statements which is supported by the information in the graph is, The use of fluorinated gases has contributed to global warming.

How does fluorinated gases contributes to global warming?

Fluorinated gases, also known as F-gases, are a group of man-made gases that are commonly used in various industrial and commercial applications, such as refrigeration and air conditioning systems, electrical equipment, and aerosol sprays. They are made up of compounds such as hydrofluorocarbons (HFCs), perfluorocarbons (PFCs), and sulfur hexafluoride (SF6).

F-gases are potent greenhouse gases, meaning they have a high global warming potential (GWP), which is a measure of their ability to trap heat in the atmosphere. For example, HFCs have a GWP that is thousands of times greater than that of carbon dioxide (CO2).

When F-gases are released into the atmosphere, they contribute to global warming by trapping heat and preventing it from escaping into space. This effect, known as the greenhouse effect, causes the Earth's temperature to rise and leads to climate change.

In addition to their direct impact on global warming, F-gases can also indirectly contribute to climate change by promoting the use of energy-intensive technologies, such as air conditioning and refrigeration systems. The increased demand for energy can lead to the burning of fossil fuels, which further increases greenhouse gas emissions and exacerbates global warming.

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Answer:

The wires are not making contact with both sides of the load.

Explanation:

To make the load (light bulb) work properly in a circuit, you need to make sure that it is connected correctly and that the power source (the battery) is providing enough energy to power it. To fix the problem, you can connect one end of the light bulb to the positive terminal of the battery and the other end to the negative terminal. This will complete the circuit and allow electricity to flow from the battery to the light bulb and back to the battery.

A convergent boundary is a type of tectonic boundary where two plates of the Earth's lithosphere move towards each other and collide, resulting in the deformation and destruction of the plates. This type of boundary can occur between two continental plates, between an oceanic plate and a continental plate, or between two oceanic plates.

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Answer:

Calculating the net force on a roller coaster at any time while it is moving requires knowledge of several factors, including the coaster's mass, velocity, acceleration, and the forces acting on it. Here are the general steps to calculate the net force:

Determine the forces acting on the roller coaster: To calculate the net force, you need to know all the forces acting on the coaster. The main forces acting on a roller coaster are gravitational force, normal force, frictional force, and air resistance (if applicable).

Find the direction of each force: You need to determine the direction in which each force is acting. Gravitational force is always acting downwards, normal force acts perpendicular to the surface of the track, and frictional force acts opposite to the direction of motion.

Determine the magnitude of each force: You need to know the magnitude (or strength) of each force acting on the coaster. Gravitational force can be calculated using the equation F = mg, where m is the mass of the coaster and g is the acceleration due to gravity (9.8 m/s^2). Normal force can be calculated using the equation N = mg*cos(theta), where theta is the angle between the coaster's velocity and the horizontal surface of the track. Frictional force can be calculated using the equation F_friction = friction coefficient * N, where friction coefficient is a constant that depends on the materials in contact and N is the normal force.

Determine the direction of motion: You need to know the direction in which the roller coaster is moving. This will be used to determine the direction of the net force acting on the coaster.

Calculate the net force: Once you know the magnitude and direction of each force, you can calculate the net force on the coaster using the equation F_net = ma, where m is the mass of the coaster and a is the acceleration.

Calculate the acceleration: To calculate the acceleration of the roller coaster, you can use the equation a = F_net / m.

Once you have calculated the net force and acceleration of the roller coaster, you can use these values to determine the coaster's speed and position at any given time, using kinematic equations.

Explanation:

The number of protons in an atoms gives its atomic number whereas the number of protons and neutrons gives the mass number. The symbol of the element protactinium is Pa.

The isotope can be defined as the chemical element which possess the same number of protons and electrons, but differ in the number of neutrons. These are the elements which have the same atomic number but different mass numbers.

Here the mass number of the element protactinium = 91 + 143 = 234. The atomic number is 91, so the isotope can be denoted as ₉₁²³⁴Pa.

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Answer:

To solve this problem, we need to use the ideal gas law to find the volume of NH3 produced. The ideal gas law is PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature.

First, we need to find the volume of N2 consumed:

PV = nRT

V = nRT/P

V = (26.00 mol)(0.08206 L·atm/mol·K)(481.15 K)/(4.50 torr/760 torr/atm)

V = 91.9 L

According to the balanced chemical equation, 2 moles of NH3 are produced for every 1 mole of N2 consumed. Therefore, the number of moles of NH3 produced is:

n(NH3) = 2 x n(N2) = 2 x 26.00 mol = 52.00 mol

Next, we can use the ideal gas law to find the volume of NH3 produced:

PV = nRT

V = nRT/P

V = (52.00 mol)(0.08206 L·atm/mol·K)(481.15 K)/(4.50 torr/760 torr/atm)

V = 183.7 L

Therefore, the volume of NH3 produced is 183.7 liters, rounded to two decimal places.

Explanation:

Refer to pic.............

Explanation:

Mass percent of silver in silver nitrate = 63.5 g100 g×100%=63.5%

The percent of silver in AgNO₃ is 63.5%.

Percent composition is the percent ratio of mass of the substance to the total mass. It is calculated to be the mass of the substance divided by the molar mass of the substance which is then multiplied by 100%.

In chemistry, yield is a measure of the quantity of moles of a product formed in relation to the reactant consumed, obtained in a chemical reaction, usually expressed as a percentage.

Atomic mass of Ag = 108

Atomic mass of N = 14

Atomic mass of O = 16

Molar mass of AgNO₃ = 108 + 14 + ( 3 × 16 )

= 170 g/mol

Percentage of silver = (mass of silver/total mass) × 100

= 63.5%.

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Answer:

New growth of trees is an exception

Explanation:

when volcanoes erupt, they release hot magma that is destructive to the environment causing personal damage, lack of breathable air and death.

heat produce cannot in any way help in growth of trees

Answer: C2H5OH + 3O2-------=2CO2 + 3H2O

Explanation:

The gas pressure in each container is directly proportional to the number of particles of gas present.

Gas pressure is the pressure exerted by a gas when it is in a closed container. It is caused by the molecules of the gas colliding with each other and with the walls of the container. Gas pressure is usually measured in atmospheres, millimeters of mercury, or pascals. It is affected by a number of factors, such as the amount of gas present in a container, the temperature of the gas, and the volume of the container.

According to Boyle's law, the pressure of a gas is inversely proportional to its volume. Therefore, the pressure in each container is directly proportional to the number of particles of gas present, and the pressure in the first container is 50 kPa, the pressure in the second container is 100 kPa, and the pressure in the third container is 150 kPa.

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C3C3I3N3

CCIN=? ?=184.5

14+14+17+15

=60

60×3=180

The relative quantity of the water holds a small number of ions. ions dissolved in the water in. The correct option to this question is C.

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Compounds formed and named:

Fe²⁺ + Cl⁻¹ → FeCl₂, Iron(II) chloride

Mn²⁺ + Cl⁻¹ → MnCl₂, Manganese(II) chloride

Hg²⁺ + O⁻² → HgO, Mercury(I) oxide

Cu⁺¹ + O⁻² → Cu₂O, Copper(I) oxide

Cu⁺² + O⁻² → CuO, Copper(II) oxide

Sn⁺⁴ + Br⁻¹ → SnBr₄, Tin(IV) bromide

The traditional system of naming compounds typically involves using the names of the elements in the compound along with suffixes to indicate the relative proportions of each element. For example, the compound NaCl would be named sodium chloride, and the compound CaCO₃ would be named calcium carbonate.

The traditional system is often used for common, well-known compounds, while the systematic system of naming, which uses prefixes and numerical indicators to indicate the number of each element in the compound, is often used for more complex or less well-known compounds.

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Answer:

D: Acid rainwater seeps into the ground and dissolves limestone

Answer:

Explanation: 2  KBr +  Cl2 --> 2KCl + Br2  (single replacement or single displacement depending on your textbook)

3 Mg  + Fe2O3  --> 3 MgO  + 2 Fe  Single replacment

Both sides have to equal each other so you need 2 in front of KBr to have 2 K and 2 Br,  you need 2 infront of KCl to have 2 of each.  Its because of the Cl2 and Br2 in the equation.

Because you have a 2 in Fe2O3 you put the 2 in front of Fe.  Because you have a 3 after the O in Fe2O3 you put a 3 in front of MgO.  Because you put the 3 in front of MgO you put a 3 in front of Mg.  

You have to have the same number before and after the -->

The volume of the methane gas bubble at the ocean surface at 1.0 atm and 293 K is approximately 0.063 mL.

Ideal gas is theoretical gas composed of randomly moving point particles that are not subject to the interparticle interactions.

PV = nRT

P is pressure, V is volume, n is number of moles, R is gas constant, and T is temperature.

V = (nRT) / P

n = PV / RT

P and V are the pressure and volume of bubble at the ocean floor, R is gas constant, and T is temperature of the bubble at the ocean floor.

n = (623 atm) x (0.10 mL) / (0.08206 L atm/mol K x 279 K) = 2.76 x 10^-6 mol

V = (nRT) / P

P is the pressure of the bubble at the ocean surface, which is 1.0 atm, and T is temperature of the bubble at the ocean surface, which is 293 K.

V = (2.76 x 10⁻⁶ mol x 0.08206 L atm/mol K x 293 K) / 1.0 atm = 6.27 x 10⁻⁵ L

V = 6.27 x 10^-5 L x (1000 mL / 1 L) = 6.27 x 10^-2 mL

Therefore, the volume of the methane gas bubble at the ocean surface at 1.0 atm and 293 K is approximately 0.063 mL.

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The freshwater flatworm, Dugesia tigrina, is an example of an organism that can reproduce both sexually and asexually.

The ability to reproduce sexually as well as asexually provides several advantages to the organism. Because only one parent is required and many offspring can be produced quickly, asexual reproduction can allow for rapid population growth. This is especially advantageous in favourable environments with abundant resources, as the offspring can quickly colonise the area and outcompete other organisms. Asexual reproduction can also ensure that desirable characteristics are passed down from generation to generation.Sexual reproduction, on the other hand, allows for genetic diversity because offspring inherit traits from both parents. This genetic variation can be advantageous in changing or unpredictable environments because it increases adaptability and the ability to deal with new challenges.

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According to the information from the question, the metal's specific heat is 0.60 J/goC.

Commonly known as specific heat, this term means the quantity of energy required to raise a material's temperature by 1 in one gram. Typically, caloric or joules a gram per degree Celsius are used as the units for specific heat. For instance, water has a specific heat of 1 caloric (or 4.186 megawatts) per gram per degree Celsius.

The following information was gleaned from the query:

Metal mass (M) equals 74 g

Metal's temperature (T) is 94 °C.

120 g is the mass of water (Mvv).

Water's temperature (Tvv) is 26.5 °C.

Temperature of equilibrium (Te) is 32 °C.

Water's specific heat capacity (Cvv) is 4.184 J/goC.

Specific heat capacity of metal (C) =?

How to calculate the metal's specific heat capacity

The following methods can be used to determine the gold sample's specific heat capacity:

The principle of energy states that the total that:

Heat loss = Heat gain

MC(T –Tₑ) = MᵥᵥC(Tₑ – Tᵥᵥ)

74 × C(94 – 32) = 120 × 4.184 (32 – 26.5)

C × 4588 = 2761.44

Divide both side by 4588

C = 2761.44 / 4588

C = 0.60 J/gºC

Hence, the metal has a specific heat capacity approximately 0.60 J/goC.

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Answer:

The oxygen atom in water is partially negative and the hydrogen atoms are partially positive. In ethanol, the oxygen atom is partially negative and the carbon and hydrogen atoms are partially positive.

The heat absorbed is  1713.8 J

Heat capacity is the amount of heat energy required to increase the temperature of a substance by one degree Celsius (or Kelvin). We can use it as the means that we can use to identify a given substance.

Heat capacity is important in engineering thermodynamics, materials science, and process engineering.

We know that;

H = mcdT

H = 100 g * 4.18 * (27.8 - 23.7)

H = 1713.8 J

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Answer:

The silicates, owing to their abundance on Earth, constitute the most important mineral class. Approximately 25 percent of all known minerals and 40 percent of the most common ones are silicates; the igneous rocks that make up more than 90 percent of Earth's crust are composed of virtually all silicates. The vast majority of the minerals that make up the rocks of Earth's crust are silicate minerals. These include minerals such as quartz, feldspar, mica, amphibole, pyroxene, olivine, and a great variety of clay minerals.

Explanation:

Cations are formed when impartial atoms lose electrons, which are then transferred to other atoms. The resulting cation is positively charged. For example, this manner is accountable for the advent of sodium chloride, better recognized as table salt. The sodium atom loses an electron, forming a sodium cation.

metals

This is absolutely one of the chemical houses of metals and nonmetals: metals have a tendency to shape cations, whilst nonmetals have a tendency to structure anions.

Most transition metals vary from the metals of Groups 1, 2, and 13 in that they are capable of forming more than one cation with distinct ionic charges. As an example, iron frequently types two unique ions.

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In general, if the change in temperature is proportional to the amount of copper(II) sulfate used, then increasing the amount of copper(II) sulfate used will lead to a corresponding increase in temperature change, and decreasing the amount of copper(II) sulfate used will result in a decrease in temperature change.

Temperature change in substances can be caused by a variety of factors, including the addition or removal of heat energy, changes in pressure, chemical reactions, and phase changes (such as melting, boiling, or freezing).

If this relationship does not hold, it could indicate that other factors are also at play, such as a limiting reagent or a change in reaction conditions. Therefore, comparing the results from parts A and B can help determine whether the change in temperature appears to be proportional to the amount of copper(II) sulfate used or not.

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The complete question is:

Copper(II) Sulfate and Zinc

The reaction between zinc (Zn) and copper sulfate (CuSO₄) is an oxidation-reduction reaction. Zinc reacts with copper sulfate to form zinc sulfate. So, zinc undergoes oxidation. At the same time, copper sulfate reduces to pure metallic copper and so undergoes reduction. Here is the equation for the reaction:

Zn + CuSO₄ → Cu + ZnSO₄.

In this task, you’ll carry out this oxidation-reduction reaction to ±nd the enthalpy of the reaction.

If you need a refresher on using a graduated cylinder and an electronic balance, watch the videos about measuring volume and measuring mass. Before you begin this task, review the lab safety guidelines.

Estimated time to complete: 1 hour

If you’ve purchased an Edmentum lab kit, remove the items that appear in the equipment list. The chemicals are located inside a box within the kit. You’ll also need distilled or tap water and a pen or a fine-tip marker for labeling test tubes.

You’ll need these materials:

Compare the results from parts A and B. Does the change in temperature appear to be proportional to the amount of copper(II) sulfate used? (edmentum lab)

Answer:

The molarity (M) of a solution is calculated by dividing the moles of solute by the volume of solution in liters.

First, we need to calculate the moles of aluminum chloride:

moles of AlCl3 = mass / molar mass

moles of AlCl3 = 20.0 g / 133.34 g/mol

moles of AlCl3 = 0.150 mol

Next, we need to convert the volume of solution from milliliters to liters:

volume of solution = 500 mL / 1000 mL/L

volume of solution = 0.500 L

Finally, we can calculate the molarity of the solution:

Molarity = moles of solute / volume of solution

Molarity = 0.150 mol / 0.500 L

Molarity = 0.30 M

Therefore, the molarity of the aluminum chloride solution is 0.30 M.

Explanation:

Refer to pic.............

Answer:

Friction is the force that opposes the motion of a solid object over another. There are mainly four types of friction: static friction, sliding friction, rolling friction, and fluid friction.