For the following reaction, 8.71 grams of nitrogen gas are allowed to react with 6.34 grams of oxygen gas . Nitrogen (g) + oxygen (g) -> Nitrogen monoxide (g) What is the maximum amount of nitrogen monoxide that can be formed? What is the formula for the limiting reagent? What amount of the excess reagent remains after the reaction is complete?

Answer:

there is no picture, but it will be a graph that shows a mostly straight line going up to the right

Explanation:

We can see here that the best fuel is the one that produces the most heat per unit mass. In this case, the fuel that produces the most heat per unit mass is methanol.

Fuel is a substance that is used to produce energy through combustion or other chemical reactions. It is commonly utilized to power various forms of transportation, generate heat or electricity, and operate machinery and appliances.

The results of the experiment are shown below:

Fuel            Mass (g)      Heat produced (J)       Heat per gram (J/g)

Methanol 1.0                          350                   350

Ethanol         1.0                          250                   250

Propane         1.0                          200                   200

Butane         1.0                          150                            150

Pentane         1.0                          100                            100

It is important to note that the results of this experiment are only a measure of the heat produced by the fuels.

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Answer: D

Explanation:

Utilicé traductor de español para responder esta pregunta

Answer:

Molarity: 0.522M

Percentage by mass: 2.36 (w/w) %

Explanation:

Formic acid, HCOOH reacts with NaOH as follows:

HCOOH + NaOH → NaCOOH + H₂O

To solve this question we must find the moles of NaOH added = Moles formic acid. Taken into account the dilution that was made we can find the moles -And molarity of formic acid and its percentage by mass as follows:

Moles NaOH = Moles HCOOH:

0.01580L * (0.1322mol / L) =0.002089 moles HCOOH

Moles in the original solution:

0.002089 moles HCOOH * (25mL / 10mL) = 0.005222 moles HCOOH

Molarity of the solution:

0.005222 moles HCOOH / 0.01000L =

Mass HCOOH in 1L -Molar mass: 46.03g/mol-

0.522moles * (46.03g / mol) = 24.04g HCOOH

Mass solution:

1L = 1000mL * (1.02g / mL) = 1020g solution

Mass percent:

24.04g HCOOH / 1020g solution * 100

2.36 (w/w) %

The partial pressure of F2 and a mixture of gases where the total pressure is one atm. The mole fraction of F2 is 0.394736.

The term mole fraction is defined as the number of molecules of a component in a mixture is divided by the total number of moles in the given mixture.

Total pressure = 1 atm

= 760 torr

Then,

The partial pressure of F2 = 300 torr

The mol fraction of F2 = PF2/PT

= 300/760

= 0.394736

Thus, The partial pressure of F2 and a mixture of gases where the total pressure is one atm. The mole fraction of F2 is 0.394736.

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Answer:

2,050,000,000,000 mL

Explanation:

To find the volume in mL, you need to (1) convert the mass from µg to g  and then (2) calculate the volume (by multiplying the mass by the density). It is important to arrange the conversion in a way that allows for the cancellation of units (the desired unit should be in the numerator). Discrediting the sig figs of the density (because official conversions do not affect sig figs), the final answer should have 3 sig figs like the given mass.

(Step 1)

1 x 10⁻⁶ µg = 1 g

  986 µg                   1 g
----------------  x  --------------------  =  9.86 x 10⁸ g
                           1 x 10⁻⁶ µg

(Step 2)

  9.86 x 10⁸ g                  1 mL
-----------------------  x  ----------------------  =  2.05 x 10¹² mL
                                   4.8 x 10⁻⁴ g

=  2,050,000,000,000 mL

The right answer to the previous question and the correct observation of a chemical property is that zinc reacts with hydrochloric acid.

ZnCl2 +H2 = Zn +2HCL

Balanced equation:  

ZnCl2 + H2 Zn + 2HCL

Zinc is a chemical element, designated by the symbol Zn and the atomic number 30. When the oxidation is removed, zinc turns shiny-greyish and at room temperature turns into a somewhat brittle metal.

All living things, including people, animals, plants, and microorganisms, depend on the trace metal zinc. It is the trace metal that is present in people in the second-highest concentration after iron. Zinc is an essential nutrient for development and a key cofactor for various enzymes. A lack of zinc can lead to a variety of diseases. Deficiency can lead to diarrhoea, infection susceptibility, and slower growth.

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Answer:

In this reaction, Ca(OH)2 is a reducing agent. It reacts with hydrogen chloride to form calcium chloride and water. Therefore, the following reaction shows that matter is neither created nor destroyed in a chemical reaction: Ca(OH)2 + 2HCI -> CaCl2 + 2H20. The formation of calcium chloride and water from the hydrolysis of calcium hydroxide is not an example of matter being created or destroyed in a chemical reaction because it does not involve the breaking down of any bonds between atoms.

Explanation:

Time did it take a little debbie to run 15 m if she was running 3 m/s is 5 sec.

debbie  running speed = 3 m/s

so,

in one meter = 1/3 sec

we have to calculate the time taken by little debbie to run 15 meters ,

therefore,

Time = distance / speed

time take by debbie to run 15 m = 15 / 3 sec

                                                     = 5 sec.

so, time taken by little dubbie to cover the distance of  15 meter is 5 sec.

Hence, Time did it take a little debbie to run 15 m if she was running 3 m/s is 5 sec.

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Answer:

berylium

Explanation:

atomic number 4 atomic mass 8 and charge +1

Explanation:

Mole ratio of NaOH : HCl = 1: 1

Moles of NaOH used = 0.1 mol/1000 cm3 × 27.20 cm3

= 2.72 × 10^-3 mol

Therefore moles of HCl used is also 2.72 × 10^-3 mol

So concentration of HCl can be found by dividing the no.of moles of HCl by the volume of HCl as follows

2.72 × 10^-3 mol/ 5cm3

1000cm3 = 1dm3

Therefore,

1cm3 = 1/1000 dm3

5cm3 = 5/1000 dm3

HCl conc. = 2.72 × 10^-3 mol/ 5×10^-3 dm3

= 0.544 moldm-3

Quantum numbers are a set of four numbers used to describe the quantum state of an electron in an atom. These numbers specify the energy, orbital shape, orientation, and spin of the electron.

What is Energy Sublevels?

Energy sublevels, also known as subshells, are regions within an energy level where electrons are likely to be found. Each energy sublevel is characterized by a unique shape and orientation in space, and can contain a specific number of electrons.

The energy sublevels within an energy level are arranged in order of increasing energy, with the s sublevel being the lowest in energy and the f sublevel being the highest in energy. The number and arrangement of electrons in an atom's energy sublevels determine its electronic configuration and its chemical and physical properties.

a. When n = 1, there is only one energy level and it contains one s orbital.

b. The 3p sublevel corresponds to the third energy level (n=3) and consists of three p orbitals. The p orbitals are oriented along the x, y, and z axes and can hold a total of 6 electrons (2 electrons per orbital). Therefore, the 3p sublevel contains three p orbitals.

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Answer:

294.3 g/mol b.

The mass of 1.0*10^9 molecules of aspartame is 2.943*10^11 g/mol

ASPARTAME

Aspartame is  used as an artificial non-saccharide sweetener 200 times sweeter than sucrose, and is commonly used as a sugar substitute in foods and beverages.

CALCULATION

mass  of one molecule of aspartame = 294.3g/mol

mass of 1.0*10^9 molecules of aspartame =294.3*(1.0*10^9) g/mol

                                                                     =2.943*10^11 g/mol

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The container's building bricks are a type of material known as a mixture since it consists of two different components.

A mixture of two chemicals would be the kind of substance represented in the diagram. This is so because the first brick is made of two separate elements, one of which is yellow and the other of which is black. The other block has a red and blue color scheme to indicate that it is also a composite made up of two separate elements.

Chemical reactions between two or more elements can result in the formation of compounds. Physical mixing of two or more substances results in the formation of mixtures. 2. Types. Three categories of compounds are possible.

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Gravity causes spacecraft such as stars, planets, moons, and other bodies to orbit one another. Revolution describes this style of movement.

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The other compound that makes up most of the other gases in the table is water vapor.

Water vapor is not listed in the table because it is not a pollutant. However, it is a significant component of exhaust gas, and it can contribute to smog formation. Water vapor is formed when the fuel in a petrol engine is burned. The combustion process produces water as a byproduct.

The amount of water vapor in the exhaust gas depends on the temperature of the combustion process. At higher temperatures, more water vapor is produced. Water vapor is not a pollutant in itself, but it can contribute to smog formation.

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Complete question:

this table shows the percentages of some gases in the exhaust from a petrol engine

nitrogen 68

carbon dioxide 15

carbon monoxide 1

oxygen 0.75

nitrogen oxides 0.24

hydrocarbons 0.005

sulphur dioxide 0.005

other gases

what is the name of the other compound that makes up most of the other gases in the table?

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.

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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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The statement that describes the motion of the squirrel between 5s and 8s is as follows: The squirrel's speed did not change (option C).

A graph in mathematics and statistics is a data chart (graphical representation of data) intended to illustrate the relationship between a set (or sets) of numbers (quantities, measurements or indicative numbers) and a reference set, whose elements are indexed to those of the former set(s) and may or may not be numbers.

According to this question, a graph is used to illustrate the relationship between the distance moved by a squirrel and the time it took it to move i.e. the journey of squirrel for a certain interval or period of time.

Based on the graph above, the speed increased with time up until 5 seconds, however, from 5seconds till 8 seconds, the speed of the squirrel remained constant i.e. did not change until it picked up again.

Therefore, option C is the correct description of the situation of the squirrel between 5s to 8s.

The options to the incomplete question are as follows:

A. The squirrel's speed increased

B. The squirrel's speed decreased

C. The squirrel's speed did not change

D. The squirrel moved backward

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According to the above-balanced reaction, 2 moles of hydrogen and 1 mol of oxygen combine to form 2 moles of water.

As long as there is one mole of O2, 2 H2 + O2 2 H2O produces the same amount of water as H2. Hence, if you start wit 3 mole of H2 and 1.5 moles with O2, you will end up with 3 mole of H2O.

Response and justification 6 moles more oxygen gas must be produced in order to make 12 moles of water. This is due to the fact that water and hydrogen mix according to the equation for balance: O2 (g) + 2H2 (g) = 2H2O (g) 2 H2 (g) with O2 (g) results in 2 H2 O (g).

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Answer:

V₁ = 808.9mL

Explanation:

Based on Charles's law, the volume of a sample of gas is directely proportional to its absolute temperature. The formula is:

\(\frac{V_1}{T_1} =\frac{V_2}{T_2}\)

Where V is volume and T is absolute temperature of 1, initial state and 2, final state of the gas.

The initial state is:

V₁ = Our incognite

T₁ = 79°C + 273.15 = 352.15K

Final state is:

V₂ = 990.4mL

T₂ = 158°C + 273.15 = 431.15K

Replacing:

\(\frac{V_1}{352.15K} =\frac{990.4mL}{431.15K}\)

Considering the Charles's Law,  the volume at 79 °C is 808.86 mL.

Charles's Law consists of the relationship that exists between the volume and the temperature of a certain quantity of ideal gas, which is maintained at a constant pressure.

This law says that for a given sum of gas at a constant pressure, as the temperature increases, the volume of the gas increases and as the temperature decreases, the volume of the gas decreases because the temperature is directly related to the energy of the movement they have the gas molecules.

In summary, Charles's law is a law that says that when the amount of gas and pressure are kept constant, the quotient that exists between the volume and the temperature will always have the same value:

\(\frac{V}{T}=k\)

Studying two different states, an initial state 1 and a final state 2, it is satisfied:

\(\frac{V1}{T1}=\frac{V2}{T2}\)

In this case, you know:

Replacing in Charles's law:

\(\frac{V1}{352 K}=\frac{990.4 mL}{431 K}\)

Solving:

\(V1=\frac{990.4 mL}{431 K}x352 K\)

V1=808.86 mL

Finally, the volume at 79 °C is 808.86 mL.

Learn more:

Volume=10ml

Density=1.5g/ml

\(\boxed{\sf Density=\dfrac{Mass}{Volume}}\)

\(\\ \sf\longmapsto Mass=Density\times Volume\)

\(\\ \sf\longmapsto Mass=1.5(10)\)

\(\\ \sf\longmapsto Mass=15g\)

The volume of the second vessel is approximately 450 mL. In physics and chemistry, pressure is an important concept that is used to describe the behavior of gases, liquids, and solids under different conditions.

What is Pressure?

It is a scalar quantity and is expressed in units such as pascals (Pa), pounds per square inch (psi), atmospheres (atm), or torr. Pressure is created by the collision of particles (atoms or molecules) with the walls of a container, and it can be influenced by factors such as temperature, volume, and the number of particles present.

The first step is to use the combined gas law to relate the initial conditions to the final conditions:

(P1V1)/T1 = (P2V2)/T2

where P is pressure, V is volume, and T is temperature, with subscripts 1 and 2 representing the initial and final conditions, respectively.

Plugging in the given values, we get:

(895 torr)(550.0 mL)/(313.15 K) = (745 torr)(V2)/(273.15 K)

Solving for V2, we get:

V2 = (895 torr)(550.0 mL)/(313.15 K) * (273.15 K)/(745 torr) ≈ 450 mL

Therefore, the volume of the second vessel is approximately 450 mL.

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Answer:

Lead  sulfide.

Explanation:

Answer:

C.

Explanation:

They will need to know the influence of gravitational force on objects because gravity can affect an objects weight.

The specific characteristics of the layers that make up the Earth's atmosphere affect the types of wavelengths that are reflected. Troposphere, stratosphere, and mesosphere are the three layers.

The stratosphere, which contains the ozone layer, is the next layer. The sun's dangerous UV light is absorbed by ozone, keeping it from reaching the surface of the Earth. Visible light and some infrared radiation can travel through this layer.

The mesosphere is located above the stratosphere, where the majority of meteoroids burn up as they enter the atmosphere of the Earth.

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Answer:

Therefore, H2O is being reduced, while CO is being oxidized.

Explanation:

In a chemical reaction, a species that gains electrons is being reduced, while a species that loses electrons is being oxidized.In the reaction given, H2O is gaining electrons, while CO is losing electrons.

There are approximately \(1.258 x 10^2^3\) formula units in 50.0 g of PbO2.

We must utilize the molar mass of PbO2 (lead dioxide) and the idea of Avogadro's number to calculate the number of formula units in a given mass of PbO2.

The molar mass of PbO2 is calculated as follows:

1 atom of Pb (lead) has a molar mass of approximately 207.2 g/mol.

2 atoms of O (oxygen) have a combined molar mass of approximately 32.0 g/mol (16.0 g/mol per oxygen atom).

Therefore, the molar mass of PbO2 is:

Molar mass of PbO2 = (1 * molar mass of Pb) + (2 * molar mass of O)

= (1 * 207.2 g/mol) + (2 * 16.0 g/mol)

= 207.2 g/mol + 32.0 g/mol

= 239.2 g/mol

Now, we can use the molar mass to determine the number of formula units in 50.0 g of PbO2.

Number of moles = Mass (in grams) / Molar mass

= 50.0 g / 239.2 g/mol

≈ 0.209 moles (rounded to three decimal places)

Since 1 mole of any substance contains Avogadro's number of particles \((approximately 6.022 x 10^2^3),\)we can calculate the number of formula units by multiplying the number of moles by Avogadro's number:

Number of formula units = Number of moles * Avogadro's number

\(= 0.209 moles * (6.022 x 10^2^3 formula units/mole)\)

≈\(1.258 x 10^2^3 formula units\)

Therefore, there are approximately\(1.258 x 10^2^3\) formula units in 50.0 g of PbO2.

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