The chemical equation of the reaction between Hydrogen and Oxygen is given below
H2 + O2 → H2O
(a) Write down the reactants and product of this reaction
(b) This chemical equation is not balanced . Why?
(c) Balance the given equation
9. Consider the given unbalanced reaction
Na + O2 → Na2O
(a) Find out the mono atomic and diatomic molecules in this equation
(b) What is the chemical compound present in this equation
(c) Balance the given equation

The minimum liter of water that must pass through a sample of the compound at 35.2°C to vaporize 1.0 mg of the compound is 0.44 L.

To answer this question, use the ideal gas sales formula:

                                          PV=nRT

P is the ideal gas pressure (Pa).

V is the ideal gas volume (m³).

n is the number of moles of particles (mol).

R is the ideal gas constant with the R value for all gases being the same. R = 8.314 x 10³J/kmol.K.

T is the ideal gas temperature (K).

Using the ideal gas equation

T = 35.2 + 273 = 308.2 K

The molar mass of methyl salicylate = 152.15 gm/mol

number of moles: n = 1 mg/152.15 gm/mol = 6.57 * 10^(-6) mol

PV = nRT

0.278/760 * V = (6.57 * 10^(-6)) * 0.0821 * 308.2

3.6 x 10-4 * V = 1.6x 10-4

                  V = 1.6x 10-4/3.6 x 10-4

                  V = 0.44 L

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We have that  the correct wedge and dash conformation for the following Newman projection is

IV

From the Diagrams above

Two CH_3 groups points on opposite sides in plane

Two Br are on same side  of plane

Two H also on same side of the plane so the plausible  structure is IV

Therefore

The Correct option is IV

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Answer:

66 grams of ice would have to melt to lower the temperature of 352 mL of water from 15 °C to 0 °C.

Explanation:

To calculate the amount of ice that would have to melt to lower the temperature of 352 mL of water from 15 °C to 0 °C, we need to use the formula:

Q = m_water * c_water * ΔT_water + m_ice * Lf

where,
Q = the amount of heat transferred,
m_water = the mass of water, c_water is the specific heat capacity of water,
ΔT_water = the change in temperature of water, m_ice = the mass of ice,
Lf = the specific latent heat of fusion of ice.

First, let's calculate the amount of heat transferred to the water:

Q = m_water * c_water * ΔT_water
Q = 352 g * 1.0 cal/(g*°C) * (15-0) °C
Q = 5,280 cal

Next, we can use the specific latent heat of fusion of ice, which is 80 cal/g, to calculate the amount of heat required to melt the ice:

Q = m_ice * Lf
Q = m_ice * 80 cal/g
m_ice = Q / Lf
m_ice = 5,280 cal / 80 cal/g
m_ice = 66 g

Material from meteorites are not the elements used to make models of interstellar medium. The correct option is A.

The matter and radiation that prevail in the space between star systems in a galaxy are referred to as the interstellar medium in astronomy. This matter consists of gas including ionic, atomic, and molecular, dust, and cosmic rays.

Meteorite material is not used to create models of the interstellar medium.

Thus, the correct option is A.

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Answer:

The answer is

Explanation:

The volume of a substance when given the density and mass can be found by using the formula

\(volume = \frac{mass}{density} \)

From the question

mass = 7.9 g

density = 2.28 g/mL

The volume is

\(volume = \frac{7.9}{2.28} \\ = 3.46491228\)

We have the final answer as

Hope this helps you

When fossil fuels burn, several forms of energy are produced, including:

Heat energy: The primary form of energy released during fossil fuel combustion is heat. Fossil fuels contain chemical energy stored for millions of years, and when they burn, this energy is released in the form of heat. The heat energy can be harnessed for various purposes, such as heating buildings or generating steam to drive turbines.

Light energy: Burning fossil fuels can also produce light energy in the form of flames or glowing embers. This light energy is a byproduct of combustion.

Mechanical energy: Heat generated by burning fossil fuels can be converted into mechanical energy. This is typically achieved by using heat to produce steam, which drives a turbine connected to a generator. The rotating turbine converts the heat energy into mechanical energy, which is further transformed into electrical energy.

Electrical energy: Through the process described above, burning fossil fuels can ultimately generate electrical energy. The mechanical energy produced by the turbine is converted into electrical energy by the generator. Electrical energy can power various devices, appliances, industries, and infrastructure.

It's critical to note that while burning fossil fuels can produce useful forms of energy, it also results in the release of carbon dioxide and other greenhouse gases. This contributes to climate change and environmental concerns. As a result, there is a global shift towards cleaner and renewable energy sources to mitigate these negative impacts.

The physical examination of an organic compound are appearance and physical state, melting point and boiling point, solubility, density, and spectroscopic analysis

Appearance and physical state: observe the appearance of the compound and note its physical state.

Melting point and boiling point: measure the melting point and boiling point of the compound to determine its purity and identity.

Solubility: Test the solubility of the compound in different solvents such as water, ethanol, acetone, etc.

Density: determine the density of the compound to calculate its molecular weight and to assess its purity.

Spectroscopic analysis: use spectroscopic techniques such as nuclear magnetic resonance (NMR), and mass spectrometry (MS) to determine the functional groups, molecular structure, and identity of the compound.

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Answer:

0.4941, 0.5059

Explanation:

\(P_N\) = Partial pressure of nitrogen = 417 mm Hg

\(P_{Xe}\) = Partial pressure of xenon = 427 mm Hg

Total pressure in the system is given by

\(P=P_N+P_{Xe}\\\Rightarrow P=417+427=844\ \text{mm Hg}\)

Mole fraction is given by

\(X_N=\dfrac{P_N}{P}\\\Rightarrow X_N=\dfrac{417}{844}\\\Rightarrow X_{N}=0.4941\)

For xenon

\(X_{Xe}=1-0.4941=0.5059\)

or

\(X_{Xe}=\dfrac{P_{Xe}}{P}\\\Rightarrow X_{Xe}=\dfrac{427}{844}\\\Rightarrow X_{Xe}=0.5059\)

So, mole fraction of nitrogen is 0.4941 and xenon is 0.5059.

We have that the Electronegative difference of 2.15 basically makes ionic bonds

Ionic bonds is to be formed

Generally, the common electronegativity of the team 1 factors are 0.84 and the common electronegativity of the team 17 factors are 2.99.

Group 17 factors are an awful lot greater electronegative than Group 1 elements.

Group 17 consists of F, Cl, Br and I,Group 1 factor that is Na loses 1 electron from its outermost orbit and varieties Na+ cation.

Group 17 Element that is Cl accepts 1 electron in its outermost orbit and Creates Cl- anion. Now, Na+ cation and Cl- anion combines collectively by using ionic bonds.

Hence, the electronegative difference

(2.99-0.84)=2.15

Electronegative difference of 2.15 basically makes ionic bonds

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Answer:

true. i looked it up and it says nitrogen is larger.

Answer:

[C₅H₅N] = 1.34 X 10⁻⁵M

Explanation:

C₅H₅N(aq) having a pH of 9.17 would also have a pOH of 14 - 9.17 = 4.83.

Since Nitrogen derivatives form hydroxides in water then

C₅H₅N + H₂O => C₅H₅N:HOH => C₅H₆OH⁻ <=> C₅H₆⁺ + OH⁻

The [OH⁻] = 10⁻⁴.⁸³M = 1.348 x 10⁻⁵M

First, we have to convert each compound to moles, using the molar mass of each of them. The molar mass of Al is 27 g/mol and the molar mass of O2 is 32 g/mol (you can calculate the molar mass using the periodic table).

The conversion for 99.20 g of Al and 30.22 g of O2 would be:

Now, let's see how many moles of Al2O3 each of them produces. In the reaction, you can see that 4 moles of Al produce 2 moles of Al2O3:

And 3 moles of O2 produce 2 moles of Al2O3:

You can realize that we can just produce a minimum of 0.6293 moles of Al2O3 because there is an excess of Al, meaning that the limiting reactant is O2 and we take into account the number of moles of Al2O3 (0.6293 moles) produced by this compound.

The final step is to convert from 0.6293 moles of Al2O3 to grams using the molar mass of Al2O3 which is 102 g/mol:

The answer would be that we're producing 64.19 g of Al2O3 from the reaction of 99.20 g of Al and 30.22 g of O2.

Answer:

You have to write the full question

Answer:

Explanation:

The density of a substance can be found by using the formula

To calculate the Density in g/mL we must first convert the mass from kg to g and the volume from L to mL

For the mass

That's

1.34 kg

1kg = 1000 g

1.34 kg = 1000 × 1.34 = 1340 g

For the volume

That's

2.0 L

1 L = 1000 mL

2.0 L = 2 × 1000 = 2000 mL

So we have

mass = 1340 g

volume = 2000 mL

Substitute the values into the above formula and solve for the Density

That's

We have the final answer as

Hope this helps you

Answer:

telophase

Explanation:

Answer:

physical property

Chemical property

melting point

Reactivity with a strong acid

Explanation:

The ability to conduct electricity is a physical property of copper. Most electrical cables are made of copper owing to its high electrical conductivity.

The rusting of iron is a chemical reaction. Rust is actually hydrated iron III oxide. Hence it is a chemical property of iron.

The melting points of metals can be used to classify them. The greater the density of metals, the higher their melting point.

The ability of metals to react with acids separates metals into highly reactive, moderately reactive and unreactive metals.

Copper shows physcal property & iron shows chemical property.

Physical properties are those properties which are seen by the eye due to change in the outermost appearance, whereas chemical properties are those which are shown due to change in the internal composition.

In the question, it is given that copper metal has a ability to conduct electricity and this property of metal is the physical property, as due to conduction their identity is not changing.

It is also given that iron is showing rusting due to the formation of iron oxide, so it a chemical property as identity of iron changes.

So, scientists characterize certain metals, they investigate physical properties like melting point, conductivity, density, etc. and chemical properties like reactivity with acid, base, oxygen, etc.

Hence, the ability to conduct electricity is a physical property of Cu and the ability of iron to rust is a chemical property.

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Answer:

to buy souvenirs

give me big brain

Explanation:

Answer:

The study of chemistry provides global work opportunities.

Explanation:

Answer:

2 answers.

Explanation:

1. The study of chemistry provides global work opportunities. Chemistry underpins understanding and progress in almost every science, technology, and industry sphere. It also makes a vital contribution to the economy, commerce and industry.

2. Because teachers want us to be bored and make time feel like it's stuck in honey.

If 2.54 g of PbS is burned with 1.88 g of O2, approximately 2.20 grams of Pb will be produced.

The balanced equation for the reaction of lead sulfide (PbS) with oxygen (O2) to produce lead (Pb) and sulfur dioxide (SO2) is as follows:

2PbS + 3O2 -> 2Pb + 2SO2

From the balanced equation, we can see that the stoichiometric ratio between PbS and Pb is 2:2 or 1:1. This means that for every 1 mole of PbS, 1 mole of Pb is produced.

To calculate the number of moles of PbS, we need to divide the given mass (2.54 g) by its molar mass:

Molar mass of PbS = 207.2 g/mol (Pb) + 32.07 g/mol (S) = 239.27 g/mol

Moles of PbS = 2.54 g / 239.27 g/mol = 0.0106 mol

Since the stoichiometric ratio between PbS and Pb is 1:1, the number of moles of Pb produced is also 0.0106 mol.

To calculate the mass of Pb, we multiply the number of moles by its molar mass:

Molar mass of Pb = 207.2 g/mol

Mass of Pb = 0.0106 mol x 207.2 g/mol = 2.20 g

This calculation is based on the stoichiometric ratio between PbS and Pb, where 1 mole of PbS produces 1 mole of Pb. By converting the given mass of PbS to moles and then multiplying by the molar mass of Pb, we can determine the mass of Pb produced.

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Answer:

5.74 L O₂

General Formulas and Concepts:

Chemistry - Gas Laws

Explanation:

Step 1: Define

RxN:   2HgO (s) → 2Hg (s) + O₂ (g)

Given:   111 g HgO

Step 2: Identify Conversions

STP

Molar Mass of Hg - 200.59 g/mol

Molar Mass of O - 16.00 g/mol

Molar Mass of HgO - 200.59 + 16.00 = 216.59 g/mol

Step 3: Stoichiometry

\(111 \ g \ HgO(\frac{1 \ mol \ HgO}{216.59 \ g \ HgO} )(\frac{1 \ mol \ O_2}{2 \ mol \ HgO} )(\frac{22.4 \ L \ O_2}{1 \ mol \ O_2} )\) = 5.73988 L O₂

Step 4: Check

We are given 3 sig figs. Follow sig fig rules and round.

5.73988 L O₂ ≈ 5.74 L O₂

The percentage of the area under the normal distribution curve would lie above 98.02 on the x-axis is 2.5 % , option C is the answer.

Normal Distribution is a probability distribution which is symmetric about the mean , The frequency is more near the mean and less far from the mean.

It is given in the data that

10,000 more observations were collected

the percentage of the observations would be greater than 98.02 = ?

According to the 68-95-99.7 rule,

It states that approximately

68% of the observations lie within σ of µ

95% of the observations lie within 2σ of µ.

99.7% of the observations lie within 3σ of µ.

The percentage of the observation between various intervals is attached in the image in the answer.

2.1 percent of the population is distributed in the intervals between two and three standard deviations , which is the zone above 2SD and below 3SD.

As 2.1 % is approximate , Therefore from the given option , 2.5%

The percentage of the area under the normal distribution curve would lie above 98.02 on the x-axis is 2.5 % , option C is the answer.

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Answer:

2 & 8

Explanation:

just got it right <3 gl

According to the electronic configuration, when hydrogen shares electrons with oxygen , hydrogen atom has 2 electrons and oxygen atom has 8 electrons.

Electronic configuration is defined as the distribution of electrons which are present in an atom or molecule in atomic or molecular orbitals.It describes how each electron moves independently in an orbital.

Knowledge of electronic configuration is necessary for understanding the structure of periodic table.It helps in understanding the chemical properties of elements.

Elements undergo chemical reactions in order to achieve stability. Main group elements obey the octet rule in their electronic configuration while the transition elements follow the 18 electron rule. Noble elements have valence shell complete in ground state and hence are said to be stable.

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The right response is C, which refers to a substance's melting or boiling point at a particular pressure. A phase diagram is a visual depiction of a substance's physical condition under various pressures and temperatures.

The melting or boiling point of a material at a certain pressure is represented by a specific point on the line of a phase diagram. This is so because the temperature at which a material transforms from one phase to another is known as the melting point or boiling point of that substance.

For instance, a material transforms from a solid to a liquid state when its temperature exceeds its melting point. Similar to this, when a substance's temperature hits its boiling point, it transforms from liquid to gaseous.

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Answer:

Propan-1-ol has the highest boiling point because propan-1-ol contains H-bonding in their structure. Hence, Propan – 1 – ol has the highest boiling point amongst the given options.

CH₃CH(OH)CH₂CH₃ is an  organic compound having  the highest boiling point among the following given compounds as it has alcohol functional group.

Functional group is defined as a substituent or group of toms or an atom which causes chemical reactions.Each functional group will react similarly regardless to the parent carbon chain to which it is attached.This helps in prediction of chemical reactions.

The reactivity of functional group can be enhanced by making modifications in the functional group .Atoms present in functional groups are linked to each other by means of covalent bonds.They are named along with organic compounds according to IUPAC nomenclature.

Functional group inter conversion is also possible by retro -synthesis.In some cases , functional groups can be charged molecules.

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1.15 g of Cu are there in a sample of Cu that contains\(1.09*10^{24}\)atoms

The number of grams of Cu in a sample containing\(1.09*10^{24}\)atoms can be determined using Avogadro's number, which is \(6.02*10^{23}\)atoms/mol.

First, we need to calculate the number of moles of Cu in the sample. To do this, we divide the number of atoms by Avogadro's number to get the number of moles:

\(\frac{1.09*10^{24} atoms }{6.02*10^{23} atoms/mol }= 1.81*10^{-1 }mol\)

The sample's mass needs to be determined next. Since copper has an atomic mass of 63.55 g/mol, we can use this to determine the sample's mass:

\(1.81*10^{-1} mol * 63.55 g/mol = 1.15 g\)

Therefore, the sample contains 1.15 g of Cu.

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Answer:

D. Increase the pressure.

Explanation:

Okay, lets break this down.

So first, lets imagine what decreasing the volume looks like. I like to think of it as squishing a balloon or water bottle. You condense what's inside it. So, with this in mind, lets look at the question.

A. Decrease temperature:

Does this happen when you squeeze something? It gets colder? No, that's not true. So we can eliminate that one.

B. Increase the liters:

Does this happen when you squeeze something? It gets larger? It takes up more space? No, that's not true. So we can eliminate that one.

C. Decrease in moles:

Okay, so moles is just a fancy way of saying "stuff." So does the amount of "stuff" decrease when you squeeze something? No, it just gets closer together. It's denser. So we can eliminate that one.

D. Increase the pressure:

Now we're getting somewhere!! When you squeeze a balloon, the pressure DOES increase because you are condensing the gas inside it. That's why balloons will pop if you squeeze too hard, the pressure is too great and has to escape. So yes, this is your answer.

Answer: D. Increase the pressure

Answer:

252 Joules

Explanation:

I thin k this is right, im so sorry if not!! :)

Answer:

c) H2O and HSO4-

Explanation:

The dehydration of 2-methylcyclohexanol occurs in the presence of H2SO4. Recall that acids are proton donors in solution; the equilibrium shown below is then set up,

H2SO4(aq)  +  H2O(l) ⇄H3O^+(aq) + HSO4^-(aq)

The species H2O and HSO4- are two proton acceptors in the system. According to the Brownstead- Lowry definition, a base is a proton acceptor in solution.

Hence H2O and HSO4- are bases present in the dehydration of 2-methylcyclohexanol.

Answer:

8.90 M

Explanation:

Step 1: Given data

Step 2: Calculate the initial concentration

We have a concentrated NaCl solution and we want to prepare a diluted one. We will use the dilution rule.

C₁ × V₁ = C₂ × V₂

C₁ = C₂ × V₂  / V₁

C₁ = 5.00 M × 1.13 L  / 0.635 L

C₁ = 8.90 M

Answer:

\(\large \boxed{\text{8.90 mol/L}}\)

Explanation:

We can use the dilution formula to calculate the concentration of the original solution.

\(\begin{array}{rcl}V_{1}c_{1} & = & V_{2}c_{2}\\\text{635 mL }\times c_{1} & = & \text{1130 mL} \times \text{5.00 mol/L}\\635 c_{1}&=& \text{5650 mol/L}\\c_{1}& = & \dfrac{5650}{635}\text{ mol/L}\\\\& = & \textbf{8.90 mol/L}\\\end{array}\\\text{The initial concentration was $\large \boxed{\textbf{8.90 mol/L }}$}\)

answer = 9.96x10^-3

I hope that help you