Explain the difference between an open and closed system in terms of matter and energy.

Ideal gas law is valid only for ideal gas not for vanderwaal gas. To solve such, we need to know the relation between rate of effusion and molar mass of gases. Therefore, the new volume V₂ is 18L.

Ideal gas equation is the mathematical expression that relates pressure volume and temperature. an ideal gas on the walls of the container is inversely proportional to the volume occupied that gas.

Mathematically, Boyle's law can be written as

P₁V₁ = P₂V₂

P₁=initial pressure=342 torr

P₂=final pressure=1710 torr

V₁ = initial volume= 29.0 L

V₂=final pressure=?

Substituting all the given values in the above equation, we get

V₂ = P₁V₁/P₂

V₂ = (342 × 29.0)/1710

V₂ = 18L

Therefore, the new volume V₂ is  18L.

To learn more about ideal gas equation, here:

https://brainly.com/question/14826347

#SPJ1

Answer:

Explanation:

If a substance can be separated into its elements, it is a compound. If a substance is not chemically pure, it is either a heterogeneous mixture or a homogeneous mixture.

The factor that  doesn’t change the resistance of a wire is pressure. option A.

Resistance is a conductor's capacity to thwart the passage of current. It is controlled by the interplay of the applied voltage and the electric current passing through it. The amount of opposition any object applies to the flow of electric current is referred to as resistance.

The ohm, a unit of measurement for resistance, is represented by the Greek letter omega. According to Ohm's law, the voltage across two places is precisely proportional to the current flowing through a conductor between them.

Hence option A is correct.

Learn more about resistance at

https://brainly.com/question/17563681

#SPJ1

missing part;

The pressure

The length of the resistor.

The thickness of the resistor.

The temperature of the conductor.

Answer:

H3PO4 + H2O (Phosphoric acid + Water)

Explanation:hope its help

The term that refers to the passing of a wave through an object is "transmission."

Transmission refers to the process by which a wave passes through an object or medium. In the context of sound, transmission occurs when sound waves travel through different substances, such as air, water, or solids.

When a sound wave encounters an object, it can be transmitted through it, reflected off it, or absorbed by it, depending on the properties of the object and the medium through which the sound is traveling.

For example, when you speak into a microphone, the sound waves produced by your voice travel through the air and are transmitted to the microphone's diaphragm. The diaphragm converts the sound waves into electrical signals, which can then be amplified and reproduced as sound through speakers.

In summary, transmission is the term used to describe the passage of a wave, such as a sound wave, through an object or medium. It is an essential concept in understanding how waves interact with their surroundings and how sound propagates through different materials.

for such more questions on  transmission

https://brainly.com/question/18451537

#SPJ8

The stage that this most accurately describes while using the PCR is the initiation of DNA synthesis, also known as the denaturation stage.

In the denaturation stage of Polymerase Chain Reaction (PCR), the double-stranded DNA template is heated to a high temperature to separate the two complementary strands and create single-stranded DNA. The denaturation stage is the first step in the PCR cycle.

In this stage, the heat-stable DNA polymerase denatures the DNA and the primers anneal to the complementary single-stranded template. This marks the beginning of the extension stage, where the DNA polymerase synthesizes new complementary strands along the template DNA.

Learn more on denaturation stage here: https://brainly.com/question/27493294

#SPJ1

Each person within the laboratory needs to sign (and date) that they have read, understood, and will abide by the Laboratory Safety Manual or Safety Induction before being permitted to commence work because each individual will be held responsible for his/her action in the laboratory.

Laboratory safety rules are those guidelines regarding health and wellbeing of the laboratory technicians and personnel.

In addition to the risk of accidents and injuries, laboratories also pose a risk to the wider community as hazardous substances and waste products can be released into the environment if proper safety measures are not in place.

Prior to commencement of work in the laboratory, each individual must consent that they have read and understood the safety rules so they can be responsible for their own irregularities.

Learn more about laboratory safety at: https://brainly.com/question/2232090

#SPJ1

Answer:

Sedimentary rocks

Explanation:

My explanation is that when an animal decomposes it body returns to the ground eventually being used in the rock cycle and rocks form this through the rock cycle when broken down by weathering and erosion.

Hope this helps you

Answer:

sedimentary rocks

They form from deposits that accumulate on the Earth's surface.

According to the law of conservation of mass, the mass of CO₂ formed is 6.15 g.

The mass of  Carbon dioxide, CO₂ is produced from the given reaction between 15.00 g of CaCO3 powder and add it to 60.75 g of HCl solution is determined as follows:

The mass of the calcium carbonate, CaCO₃ reacting = 15.0 g

Mass of HCl solution reacting = 60.75 g

Total mass of reactants = 60.75 g + 15.0 g

Total mass of reactants = 75.75 g

On addition of the calcium carbonate to the HCl solution, bubbles of carbon dioxide gas, CO₂, were observed and the gas allowed to escape.

Equation of the reaction: CaCO₃ (s) + 2 HCl (aq) → CaCl₂ (aq) + H₂O (l) + CO₂ (g)

Mass of resulting solution = 69.60 g

According to the law of conservation of mass, mass of product = mass of reactant

Therefore, mass of CO₂ formed = 75.75 g - 69.60 g

mass of CO₂ formed = 6.15 g

Learn more about law of conservation of mass at: https://brainly.com/question/19038178

#SPJ1

Answer:

lungs

Explanation:

The equilibrium concentration of PO43– in a 0.809 M solution of H3PO4 would be 1.13 × \(10^{-9\) M.

To find the equilibrium concentration of PO43–, we need to consider the dissociation of H3PO4 and the successive ionization of H+ ions. The reactions are:

Let x be the concentration of H+ ions that dissociate from H3PO4, then the equilibrium concentrations of the ions are:

We can simplify the equation by assuming that x is small compared to 0.809 M, so we can neglect x in the denominator of the expressions for [H2PO4–] and [HPO42–]:

Now, we can write the expression for the equilibrium constant for the first dissociation:

Ka1 = [H+][H2PO4–]/[H3PO4] = x^2/(0.809 M - x)

Using the value of Ka1, we can solve for x:

x = sqrt(Ka1*[H3PO4]/(1 + Ka1 + Ka1*Ka2/[H3PO4]))

Substituting the given values, we get:

x = sqrt((7.5 × 10–3)(0.809 M)/(1 + 7.5 × 10–3 + (7.5 × 10–3)(6.2 × 10–8)/(0.809 M)))

x = 2.37 × 10–4 M

Now, we can calculate the equilibrium concentrations of the ions:

Therefore, the equilibrium concentration of PO43– in the solution is1.13 × \(10^{-9\) M.

More on equilibrium concentration can be found here: https://brainly.com/question/16645766

#SPJ1

Answer:

2NaCN + CaCO3 --> Na2CO3 + Ca(CN)2

Explanation:

Knowing the names gets us: NaCN + CaCO3 --> Na2CO3 + Ca(CN)2

Balance: there are two sodiums and cyanides on the product side so add a 2 to the reactant side.

The true statements are;

The reaction is endothermic

Heat is a reactant

ΔHrxn is 89 kJ/mol

Enthalpy is a thermodynamic property that represents the total energy of a system, including both its internal energy (the energy of its constituent particles) and the energy it has due to its temperature and pressure. It is commonly used in energy analysis and heat transfer calculations and is expressed in units of joules (J) or calories (cal).

We know that the enthalpy of the reaction can obtained from;

Enthalpy of the products - Enthalpy of the reactants

ΔH reaction = 2(-391.4) - 2(-435.9)

(-782.8) - (-871.8)

= 89 kJ/mol

Learn more about enthalpy: https://brainly.com/question/13996238

#SPJ1

Answer:

It is NOT 1066 kJ exothermic I just took the test

Explanation:

Binary compound is a substance that is made up of precisely two separate components and cannot be further simplified chemically. Binary compounds include, for instance, H₂O, H₂S, and NH₃.

1. NH₄Cl - It is not a binary compound because it contains more than two elements that is Nitrogen, hydrogen and chlorine.

2. CaS - It is a binary compound because it contains two elements Calcium and sulfur.

3. P₂O₅ - It is a binary compound because it contains two elements Phosphorus and Oxygen.

3. CaSO₄ - It is not a binary compound because it contains more than two elements that is calcium, sulfur and oxygen.

4.  N₂O - It is a binary compound because it contains two elements that is Nitrogen and Oxygen.

5. Cl₂- It is not a binary compound because it does not contain two different elements rather it is a diatomic molecule.

Diatomic molecules- Two atoms are chemically linked together to form diatomic molecules. A homonuclear diatomic molecule is created when two identical atoms combine, such as in the oxygen molecule (O₂). A heteronuclear diatomic molecule is created when two unidentical atoms combine, such as in the CO₂ .

To learn more about compounds refer- https://brainly.com/question/26487468

#SPJ9

Answer:

7.5 kcal

Explanation:

1.0 cal /g-C   * 100 g * (100- 25 C) = 7500 cal = 7.5 kcal

The amount of heat energy necessary to raise the temperature of 100 g of water at room temperature (25°C) to the boiling point (100°C) is 7.5 kcal.

Given to us the mass of water, the specific heat of water, and the change in temperature, we need to calculate the amount of heat energy.

m = 100 g

c = 1.0 cal/g°C

ΔT = (100 °C - 25 °C) = 75 °C

To calculate the amount of heat energy required, we can use the formula:

Q = m × c× ΔT

Where:

Q = heat energy (in calories)

m = mass of water (in grams)

c = specific heat of water (in cal/g°C)

ΔT = change in temperature (in °C)

Substituting the values into the formula:

Q = 100 g × 1.0 cal/g°C × 75 °C

Q = 7500 cal

7500 cal = 7.5 kcal

Therefore, the amount of heat energy required to raise the temperature of 100 g of water from 25 °C to 100 °C is 7500 calories, which is equivalent to 7.5 kcal.

Learn more about specific heat here:

https://brainly.com/question/31608647

#SPJ2

Answer:12

Explanation:because it’s 12

A gas with a volume of 3.5m³ is at 0.275 bar. The volume is reduced to 1.25 m³ while the temperature is held constant .The new gas pressure is

0.77 bar. This is based on Boyle's law.

Boyle's law, also known as the Boyle-Mariotte law or Mariotte's law (particularly in France), is an experimental gas law that explains how the volume and pressure of a confined gas relate to one another. Boyle's law is defined as follows:

If the temperature and amount of gas remain constant in a closed system, the absolute pressure exerted by a given mass of an ideal gas is inversely proportional to the volume it occupies.

the law can be expressed as:

P₁×V₁=P₂×V₂

Given

P₁= 0.275 bar

V₁= 3.5 m³

V₂=1.25 m³

substituting the values and solving for P₂

P₂= 0.77 bar

To know more about Boyle's law, visit;

brainly.com/question/30367133

#SPJ1

From the solubility curve, it is clear that 84 g of potassium nitrate can be dissolved in 100 g of water at 50°C.

Solubility is defined as the ability of a substance which is basically solute to form a solution with another substance. There is an extent to which a substance is soluble in a particular solvent. This is generally measured as the concentration of a solute present in a saturated solution.

The solubility mainly depends on the composition of solute and solvent ,its pH and presence of other dissolved substance. It is also dependent on temperature and pressure which is maintained.Concept of solubility is not valid for chemical reactions which are irreversible. The dependency of solubility on various factors is due to interactions between the particles, molecule or ions.

Learn more about solubility,here:

https://brainly.com/question/8591226

#SPJ1

Answer:

uhhh not really i don't even know what that is LOL

Answer:

C

Explanation:

Organic compounds are the compounds which are made only from carbon and hydrogen. The correct option is option D that is hydrocarbons are organic chemical compounds that consist of carbon and hydrogen.

Chemical Compound is a combination of molecule, Molecule forms by combination of element and element forms by combination of atoms in fixed proportion.

There are two types of compound covalent compound and ionic in chemistry, covalent compound formed by sharing of electron and ionic compound formed by complete transfer of electron. Hydrocarbons are organic compound. Hydrocarbon can have linear chain structure, ring structure or branched structure.

Therefore,  hydrocarbons are organic chemical compounds that consist of carbon and hydrogen. The correct option is option D.

To learn more about chemical compound, here:

https://brainly.com/question/26487468

#SPJ5

Step 1 - Writing the chemical equation

The first step is to identify the reactants and the products:

The first two are the reactants, whereas the last two are the products. The reaction would be thus:

Step 2 - Balancing the reaction

To balance a chemical reaction, we must guarantee the number of atoms of the same element in each side of the equations is the same. We must guarantee this because during a chemical reaction no atom can be created nor destroyed.

Let's take a further look at the reaction in step 1:

Note, first, that there are two bromine atoms in the left-hand side, but only one bromine atom in the right-hand side. We can solve this by multiplying the substance AgBr by two:

Now note that there are two silver (Ag) atoms in the right-hand side , but only one silver atom in the left-hand side. We can solve this by multiplying the substance AgNO3 by two:

Finally, let's count all atoms, just to make sure the reaction is properly balanced:

Comparing with the other side:

We can see the reaction is thus properly balanced.

Step 3 - Finding the coefficients

The coefficients are the bigger numbers before the substances. If there's no number, it means 1. The correct order would be then 2, 1, 2, 1. Item d) is thus the correct one.

Answer:

1

Explanation:

To determine the value of K (equilibrium constant) at 25 °C, we can use the Nernst equation, which relates the cell potential (E) to the equilibrium constant (K) and the standard cell potential (EºCell). The Nernst equation is given by:

E = EºCell - (RT / nF) * ln(K)

Where:

E = cell potential

EºCell = standard cell potential

R = gas constant (8.314 J/(mol·K))

T = temperature in Kelvin (25 °C = 298 K)

n = number of electrons transferred in the balanced redox equation

F = Faraday's constant (96,485 C/mol)

ln = natural logarithm

In this case, the given standard cell potential (EºCell) is -0.37 V.

The balanced redox equation for the cell reaction is:

Pt + Cr²+ -> Pt + Cr³+

Since there is no change in the oxidation state of Pt, no electrons are transferred in the reaction (n = 0).

Substituting the known values into the Nernst equation, we have:

E = -0.37 V - (8.314 J/(mol·K) * 298 K / (0 * 96,485 C/mol)) * ln(K)

E = -0.37 V

Since n = 0, the term (RT / nF) * ln(K) becomes 0, and we are left with:

-0.37 V = -0.37 V - 0

This implies that the value of K is 1, since any number raised to the power of 0 is equal to 1.

Therefore, the value of K at 25 °C for the given cell is 1.

Answer:

Increasing the temperature of 1 mol of C8H18(l) requires more energy

Explanation:

To answer this question, we need to define molar heat capacity that is the amount of heat required to increase in 1K the temperature of 1 mole of substance.

That means the substance with higher molar heat requires more energy to increase its temperature

Molar heat of octane, C8H18 is 255.68J/Kmol

Molar heat of water is 75.38J/Kmol

That means increasing the temperature of 1 mol of C8H18(l) requires more energy

Alchemy is "an early form of chemistry that people used to try to turn metal into gold".

The development of a universal cure for illness, as well as the discovery of a way to indefinitely extend life, were the goals of mediaeval chemical research and speculative philosophy.

Boyle contributed to the evolution of chemistry from alchemy. He used the experimental approach from physics and applied it to chemistry. Boyle contributed to the comparison of these two fields of knowledge by demonstrating that chemistry is just as important to study as physics.

Therefore, the correct statement will be "An early form of chemistry that people used to try to turn metal into gold".

To know more about Alchemy

https://brainly.com/question/5997100

#SPJ1

Answer: it's 4nitrogen

denotes two nitrogen atoms. 2. N 2 denotes one molecule of nitrogen gas.

Explanation:

Answer:

The answer

Explanation:

directly

greater

At constant force, acceleration varies directly with mass. When subjected to the same amount of net external force, a heavier object will experience  greater acceleration than a lighter one.

Any procedure where the velocity varies is referred to as acceleration. There are only two methods to accelerate because velocity is both a speed and a direction changing your speed or changing your direction.

Throughout time, the velocity is shifting. In actuality, the velocity is changing by a fixed rate of 10 m/s every second. An object is considered to be accelerating if its velocity is changing, it has an acceleration.

Thus, constant force, acceleration varies directly with mass. When subjected to the same amount of net external force, a heavier object will experience  greater acceleration than a lighter one.

To learn about acceleration refer the link below;

https://brainly.com/question/12550364

#SPJ2

Precision relates to the consistency and reproducibility of measurements, while accuracy reflects how close measurements are to the true value.

Precision and accuracy are two important concepts in the context of errors in measurements. While they both pertain to the quality of data, they refer to different aspects.

Precision refers to the degree of consistency or reproducibility in a series of measurements. It reflects the scatter or spread of data points around the average value. If the measurements have low scatter and are tightly clustered, they are considered precise. On the other hand, if the measurements have a high scatter and are widely dispersed, they are considered imprecise.

Accuracy, on the other hand, refers to the closeness of measurements to the true or target value. It represents how well the measured values align with the actual value. Accuracy is achieved when measurements have a small systematic or constant error, which is the difference between the average measured value and the true value.

Errors in measurements can be classified into two types: random errors and systematic errors.

Random errors are associated with the inherent limitations of measurement instruments or fluctuations in the measurement process. They lead to imprecise data and affect the precision of measurements. Random errors can be reduced by repeating measurements and calculating the average to minimize the effect of individual errors.

Systematic errors, on the other hand, are caused by consistent biases or inaccuracies in the measurement process. They affect the accuracy of measurements and lead to a deviation from the true value. Systematic errors can arise from factors such as instrumental calibration issues, environmental conditions, or experimental techniques. These errors need to be identified and minimized to improve the accuracy of measurements.

In summary, precision refers to the degree of consistency or reproducibility of measurements, while accuracy refers to the closeness of measurements to the true value. Random errors affect precision, while systematic errors affect accuracy. To ensure high-quality measurements, both precision and accuracy need to be considered and appropriate techniques should be employed to minimize errors.

Know more about Precision here:
https://brainly.com/question/30461151

#SPJ8