a sample of ammonia, nh3, is completely decomposed to nitrogen and hydrogen gas. calculate the partial pressure of nitrogen if the total pressure after the reaction is 741 torr

the components are mixed are uniformly distributed throughout the mixture, then that type of mixtures is known as a homogenous mixture.

In most technical applications, homogeneous refers to a system's qualities being constant throughout the entire system, while heterogeneous (sometimes called inhomogeneous) refers to a system's properties changing within it. Any system with two phases, such as ice and water, is referred to as heterogeneous.

A combination is considered homogeneous when the ingredients are thoroughly combined and dispersed across the entire mixture. These mixes are homogeneous throughout and include only one phase of substance.

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The concept of reversible change requires understanding that the system can quickly reach equilibrium.

A reversible change refers to a process that can proceed in both forward and reverse directions, meaning it can reach equilibrium. In a reversible process, the system can be considered to always be at equilibrium because it can shift between the forward and reverse reactions, maintaining a dynamic balance.

The term "spontaneous" is used to describe processes that occur naturally without the need for external intervention. In the context of reversibility, a reversible change can be considered spontaneous because it can occur spontaneously in both directions, forward and reverse, as long as the conditions allow it.

Therefore, the correct answer is "spontaneous."

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Answer: Slow so that the system can be considered to always be at equilibrium.

Answer:

A. the electric motor

Explanation:

A cell is a biological molecule which is the basic and functional unit of life. Cells undergo series of processes to function appropriately. ATP is an acronym for adenosine triphosphate, which is the source of energy for various cell processes.

In the given mechanical system, the electric motor provides the energy required energy to drive the system. Therefore, the electric motor has the same major function of providing energy for the system as the ATP in a cell.

0.951 moles of hydrogen gas are contained in 21.3 L of STP.

Ideal gas law is also called as real gas law. It is defined as for any gas, its volume (V) multiplied by its pressure (P) is equal to the number of moles of gas (n) multiplied by its temperature (T) multiplied by the ideal gas constant, R.

By using the ideal gas law equation;

PV=nRT

where,

P - Pressure of the gas

V - Volume occupied by the gas

n - number of moles of gas present

R - universal gas constant, usually given as 0.0821

T - absolute temperature of the gas

STP conditions are defined as a pressure of 1 atm and a temperature of 273.15 K.

By putting this value in given equation

n = 1 × 21.3 / 8.314 × 273

=  0.951 moles.

Thus, 0.951 moles of hydrogen gas are contained in 21.3 L of STP.

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Answer:

I think it's C. 6.022 * 1023

If you conduct an experiment, you need a baseline against which to measure any changes brought on by your independent variable. You split your experiment into two groups as a result. the test group and the comparison group. The variable you're testing is given to the experimental group, also known as the manipulated group.

A control setup includes identical hardware and operating procedures, but no variables are evaluated. It offers a reference point against which to compare the outcomes of an experiment setting.

The independent variable, dependent variable, control, and levels of the independent variable are only a few of the components in a scientific experiment.

An experimental control's purpose is to maintain a constant value for any variables that the experimenter is not interested in monitoring. This aids researchers in ensuring that there have been no variations from the experiment's surroundings that would have affected the results in addition to the variable they are examining.

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The fraction of a 200 g sample of potassium that would be left after 24 hours if it has a half-life of 12 hours would be 50 g.

The half-life of a substance is the amount of time required for a radioactive material to decay into half of its original mass.

The half-life of a radioactive material is mathematically expressed as:

\(n(t)\) = \(n_0(\frac{1}{2} )^\frac{t}{t_{1/2}}\)

Where:

In this case:

\(n(t)\) = 200(1/2)\(^\frac{24}{12}\)

      = 200 x 1/2 x 1/2

      = 50 grams

In other words, the fraction of a 200 g sample that would be left after 24 hours would be 50 g.

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The mass of an object with a net force of 356N and an acceleration rate of 4m/s² is 89kg.

The mass of an object can be calculated using the following formula:

F = ma

Where;

m = F/a

m = 356/4

m = 89kg

Therefore, the mass of an object with a net force of 356N and an acceleration rate of 4m/s² is 89kg.

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Answer:

Potassium Hydroxide Solution =

or

Potassium Hydroxide =

Since we know the products and one of the reactions, we can work backward to discover what the other reactant may be.

As it is in the question, we can map the reactants and product:

Reactants                   Product

Ammonium                 Ammonia

Sulfate                         Sulfate

________                   Potassium

________                    Water

Since the reaction will yield Potassium and water, the likely reactant is Potassium Hydroxide (KOH). This is because we know that Ammonium lost a Hydrogen atom that could combine with the Hydroxide radical to form water.

This becomes clear when we consider the net ionic equation:

Ammonium sulphate + Potassium Hydroxide → potassium sulfate + ammonia + water

if we write this a balanced chemical equation:

(NH₄)₂SO₄   +  2KOH  →  K₂SO₄ + 2NH₃ + 2H₂O

if we write the reaction as an ionic equation

2NH₄⁺ + SO₄⁻ + 2K⁺ + 2OH⁻ → 2K⁺ + SO₄⁻ + 2NH₃ + 2H₂O

if we remove the ions that appear on both the reactant and product side (spectator ions)

Answer:

0.5cm²

Explanation:

the volume is found by dividing the mass over the density

v=m/d

=7g/14g/cm²

=0.5cm²

i hope this helps

Answer:

\(\boxed {\boxed {\sf 0.5 \ or \ \frac {1}{2} \ cm^3}}\)

Explanation:

We are asked to find the volume of a solid given the density and mass. The formula for density is:

\(d= \frac {m}{v}\)

We know the solid's density is 14 grams per cubic centimeter and the mass is 7 grams.

Substitute the known values into the formula.

\(14 g/cm^3 = \frac{7 \ g}{v}\)

We are solving for the volume of the solid, so we must isolate the variable v. First, cross multiply. Multiply the first numerator by the second denominator, then the first denominator and second numerator.

\(\frac {14 g/cm^3}{1} = \frac{7 \ g}{v}\)

\(14 \ g/cm^3 * v= 7 \ g * 1\)

\(14 \ g/cm^3 * v= 7 \ g\)

Now the variable is being multiplied by 14 grams per cubic centimeters. The inverse operation of multiplication is division, so we divide both sides by 14 g/cm³.

\(\frac {14 \ g/cm^3 * v}{14 \ g/cm^3}= \frac {7 \ g }{14 \ g/cm^3}\)

\(v= \frac {7 \ g }{14 \ g/cm^3}\)

The units of grams cancel.

\(v= \frac {7 }{14 \ cm^3}\)

\(v= \frac {1}{2} \ cm^3\)

The volume of the solid is 1/2 or 0.5 cubic centimeters.

Answer:

the reaction was that it turned green. because it used to be brown but because the rain and carbon dioxide affected it.

Answer: yes

Explanation: no

Answer:

Growing a sunflower that is 10 feet tall is very impressive.

Explanation:

Hope it helps

Answer:

its true

Explanation: shelovesvoodoo on ig knows all

Answer:

dont know sorry

Explanation:

i dont get it

Answer:

A system can be either closed or open: A closed system is a system that is completely isolated from its environment.

An open system is a system that has flows of information, energy, and/or matter between the system and its environment, and which adapts to the exchange.

Answer:

23.5 grams of AlBr3 will be produced by 27.20 grams of NaBr

Explanation:

The balanced equation here is

6NaBr + 1AlO3 = 3Na2O + 2AlBr3

6 moles of NaBr are required to produce 2 moles of AlBr3

Mass of one mole of NaBr = 102.894 g/mol

Mass of one mole of AlBr3 = 266.69 g/mol

Mass of 6 moles of NaBr = 6*102.894 g/mol

Mass of two moles of AlBr3 = 2*266.69 g/mol

6*102.894 g  NaBr produces 2*266.69 g of AlBr3

23.5 grams of AlBr3 will be produced by (6*102.894)/(2*266.69 )*23.5 = 27.20 grams of NaBr

The atomic radius increases as you go down a group/family due to the increasing number of energy levels. On the other hand, as you go across a period/row, the atomic radius decreases due to the increasing number of protons in the nucleus.

1. As you go down a group/family on the periodic table, the atomic radius generally increases.

2. This trend is caused by the increasing number of energy levels as you go down the periodic table. As the number of energy levels increases, the distance between the nucleus and the outermost energy level also increases, leading to an increase in the atomic radius.

3. As you go across a period/row on the periodic table, the atomic radius generally decreases.

4. This trend is caused by the increasing number of protons in the nucleus as you go across the periodic table. The increased positive charge of the nucleus causes the electrons to be attracted more strongly to the nucleus, leading to a decrease in the size of the atom.

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The 14 points mean when it says reduction of armaments to the lowest point of consistent with domestic safety is colonial claims for the benefit of indigenous peoples and the environment. President Woodrow Wilson has also created a proposal that will ensure the preservation of the world in the future.

President Woodrow Wilson directly addressed the causes of World War I in his speech, calling for the abolition of secret treaties, a reduction in armaments, an adjustment in colonial claims in the interests of both native peoples and colonists, and freedom of the seas. Wilson also made proposals to ensure future world peace. He proposed, for example, the removal of economic barriers between nations, the promise of "self-determination" for oppressed minorities, and a world organization that would provide a system of collective security for all nations. Wilson's 14 Points were intended to undermine the Central Powers' will to continue and to inspire the Allies to victory.

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In "Got water?" the words that complete the sentences are:

Gray water is "lightly used" water that does not contain sewage or other heavy contaminants. It is typically generated from sources such as sinks, showers, bathtubs, and washing machines, and can often be reused for irrigation or toilet flushing.

Unlike black water, which contains human waste and is considered hazardous, gray water is generally considered safe for reuse with proper treatment. Waste water refers to any water that has been used for a specific purpose and contains contaminants or pollutants that make it unsuitable for immediate use or discharge into the environment without treatment.

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Answer:

dependent variable: plant growth

independent: sunlight impact/amount of light

Explanation:

Answer:

The dipole moment of a molecule depends on the magnitude and direction of the bond dipoles in the molecule. In water, the two O-H bonds are polar, meaning that they have a partial positive charge on the hydrogen atoms and a partial negative charge on the oxygen atom. This creates a net dipole moment for the molecule, with the negative end of the dipole moment located near the oxygen atom and the positive end located near the hydrogen atoms.

In contrast, CO2 has a linear geometry, with two polar C-O bonds oriented in opposite directions. The bond dipoles are equal in magnitude but opposite in direction, so they cancel each other out, resulting in a net dipole moment of zero.

Therefore, the dipole moment of CO2 is zero because the bond dipoles are symmetrically arranged and cancel out each other, while the dipole moment of water is nonzero because the bond dipoles are not symmetrically arranged and do not cancel out each other.

Concentration

mol (n)= M x V

\(\tt n=3.2\times 2.6=8.32\)

This is a stoichiometry question, and will be answered in two steps, but the first thing for every stoichiometry question is to have the reaction properly balanced, which the question already provided us:

S8 + 8 O2 -> 8 SO2

First step is to find the limiting and excess reactant, this will tell us which element is in excess and by how much, let's gather the data for the reactants first:

30.14 grams of S8, molar mass of S8 is 256.5g/mol

287.43 grams of O2, molar mass of O2 is 32g/mol

Now we will focus on S8, and see how many moles we have of it in this reaction:

256.5 g = 1 mol

30.14 g = x moles

x = 0.12 moles of S8 in this reaction

According to the molar ratio, 1:8, we need 1 mol of S8 and 8 moles of O2 in order to have the reaction to proceed

1 S8 = 8 O2

0.12 S8 = x O2

x = 0.96 moles of O2 if we have 0.12 moles of S8

We only need 0.96, if we have more than that, is excess, if we have less than that, this means that O2 is the limiting and S8 is in excess, so let's check how much of O2 we do have

32g = 1 mol

287.43 g = x moles

x = 8.98 moles of O2, we have a big excess of O2, we only need 0.96 moles and we have almost 9 times more

Now that we know which element is the limiting, we can use this information to find the theoretical yield of SO2

The molar ratio will also be 1:8, and since we have 0.12 moles of S8, we will have 8 times that, which is 0.96 moles of SO2, using its molar mass, 64.1g/mol, we will have the theoretical yield

64.1g = 1 mol

x grams = 0.96

x = 61.5 grams is the theoretical yield

55.59 grams is the actual yield

Now we use these two values in the percent yield formula:

%yield = actual yield/theoretical yield

%yield = 55.59/61.5

%yield = 0.90

Limiting reactant = S8

Excess reactant = O2

Percent yield = 90%

Answer: Is the chemical equation balanced or unbalanced?

Explanation:  H2 + O2 = H20

O BALANCED

O UNBALANCED

I have the same problem

A polyatomic ion is made of atoms that are covalently bonded together, which is true about polyatomic ions.

Covalent bonds form when electrons are shared between atoms. This contrasts with ionic bonds, where ions of opposite charges attract one another.

Polyatomic ions are covalently bonded molecules that contain an electrically charged atom or group of atoms. They can have either a positive or negative charge, and they are not usually found in their isolated form. Because they are charged, they have an impact on the chemistry of the surrounding substances.

An ion with more than one atom is called a polyatomic ion. There is one nitrogen atom and four hydrogen atoms in the ammonium ion. They all make up a single ion with the formula NH+4 and a charge of 1+. One carbon atom and three oxygen atoms make up the carbonate ion, which has a 2 overall charge.

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