Write structural formulas for all of the possible structural isomers of n-hexene that can be formed by moving the position of the double bond. Draw the molecules on the canvas by choosing buttons from the Tools (for bonds), Atoms, and Advanced Template toolbars. The single bond is active by default.

Answer:

right now we are using energy by online learning on our laptops , air conditioning, and transportation

Explanation:

The amount, in kJ, of heat needed to completely vaporize 50.0g of water at 100°C is 118.8 kJ.

The heat needed to completely vaporize 50.0g of water at 100°C can be calculated using the following formula:

q = m x Hv

where:

First, we need to convert 50.0g to moles by dividing by the molar mass of water which is approximately 18.015 g/mol3:

moles of water = 50.0 g / 18.015 g/mol moles of water = 2.776 mol

Thus:

q = (2.776 mol) x (40.65 kJ/mol) q = 112.8 kJ

In other words, 112.8 kJ of heat is needed to completely vaporize 50.0g of water at 100°C.

More on heat of vaporization can be found here: https://brainly.com/question/12625048

#SPJ1

The mass of the unknown element cobalt is obtained as 40 g. This can be seen from the calculation that we have in the solution.

If you have a compound that contains an unknown element, you can use the molar mass of the compound to find the relative atomic mass of the unknown element

We can see that the question has already given us the mass of the sample as we have and the percentage of the cobalt that we have in the sample.

50 = x/80 × 100

x = 50/100 × 80

= 40 g

Thus we would have a total of about 40 g of cobalt in the sample.

Learn more about molar mass:https://brainly.com/question/22997914

#SPJ1

Missing parts;

A sample of the compound weighs 80 grams.  If the mass percent of cobalt is 50%, How many grams of cobalt are in the sample?

Answer:

3 mol H2/2 mol N2

Explanation:

Mole ratios are basically from the numbers/coefficients in front of the element

Answer:

1.45 × 10⁻³ M min⁻¹

Explanation:

Step 1: Write the balanced reaction for the decomposition of dinitrogen pentoxide

2 N₂O₅(g) ⇒ 2 N₂(g) + 5 O₂(g)

Step 2: Calculate the average rate of formation of oxygen

The average rate of disappearance of N₂O₅ over the time period from t = 0 min to t = 112 min is found to be 5.80 × 10⁻⁴ M min⁻¹ (5.80 × 10⁻⁴ molN₂O₅ L⁻¹  min⁻¹). Given that the molar ratio of N₂O₅ to O₂ is 2:5, the average rate of formation of O₂ is:

5.80 × 10⁻⁴ molN₂O₅ L⁻¹  min⁻¹ × 5 molO₂/ 2 molN₂O₅ = 1.45 × 10⁻³ molO₂ L⁻¹  min⁻¹ = 1.45 × 10⁻³ M min⁻¹

B. Cao(s) (Calcium oxide)

The balanced equation would be:

Ca(s) + O2(g) --> Cao(s)

It is the product of Calcium oxide.

The product of the reaction between sodium and chlorine is sodium chloride (NaCl). When sodium (Na) and chlorine (Cl) react, they form an ionic bond, with the sodium atom losing one electron to the chlorine atom. This forms a positively charged sodium ion (Na+) and a negatively charged chloride ion (Cl-), which are held together by electrostatic attraction to form the compound sodium chloride. It is a white crystalline solid and is commonly known as table salt.

To know more about Sodium visit: https://brainly.com/question/24010534

#SPJ1

Answer:

pH of the sample of acid rain is 3.

Explanation:

Pure water has a theoretical pH of 7.00. As pH = -log [H⁺], [H⁺] = 1x10⁻⁷M

Now, the sample of acid rain has a proton concentration 10,000 times greater than pure water. That is:

[H⁺] = 10,000 * 1x10⁻⁷M = 1x10⁻³M

The pH of this sample is:

pH = -log 1x10⁻³M

Helen takes 35 nights to knit a total of 175 centimeters of scarf. Hence, she will take 36 nights to knit 180 centimeters of scarf.

Length is a basic measurement in for an object which is basically taken in meters or centimeters. The basic unit of length in American standard is meters (m) and in CGS system it is centimeters.

It is given that, Helen knit a total of 175 centimeters of a scarf over 35 nights. Then, the length she knit in one nigh is calculated as:

175/35 = 5 cm.

Therefore, the number of nights required to complete 180 cm is :

180 /5 = 36

Thus, she will take 36 nights to knit a total of 180 cm of scarf.

Find more on length units:

https://brainly.com/question/3217720

#SPJ1

Answer:

less

Explanation:

the more heat it has, the less a given heat will affect it

Answer:

more heat

Explanation:

An example of heterogeneous equilibrium is:

Heterogeneous equilibrium refers to an equilibrium state in a chemical reaction where the reactants and products exist in different physical states or phases. It occurs when substances in different phases, such as solids, liquids, and gases, are involved in a chemical reaction.

Considering the given equations:

The equation I: FeO(s) + CO(g) ⇌ Fe(s) + CO₂(g) represents a heterogeneous equilibrium.

This is because the reactants and products involve different phases (solid and gas). FeO is a solid (s), CO is a gas (g), Fe is a solid (s), and CO₂ is a gas (g). The reaction involves the conversion of a solid and a gas to another solid and a gas, and the equilibrium is established between these different phases.

Learn more about heterogenous equilibrium at: https://brainly.com/question/25257772

#SPJ1

Given the heat of fusion of water is 6.02 kJ/mol, it takes 12.9 kJ of heat to melt 38.6 g of ice at 0 °C.

Fusion, commonly known as melting, is a physical process in which matter passes from the solid to the liquid state.

We have ice with a mass of 38.6 g at 0 °C. First, we will convert mass to moles using the molar mass of water.

38.6 g × (1 mol/18.02 g) = 2.14 mol

The heat of fusion (ΔH°fus) for water is 6.02 kJ/mol. The heat (Q) required to melt 2.14 moles of ice is:

Q = 6.02 kJ/mol × 2.14 mol = 12.9 kJ

Given the heat of fusion of water is 6.02 kJ/mol, it takes 12.9 kJ of heat to melt 38.6 g of ice at 0 °C.

Learn more about fusion here: https://brainly.com/question/40140

#SPJ1

The amount of propane consumed is 8.30 L. (to three significant figures).

The balanced chemical equation for the combustion of propane is:

C₃H₈ + 5O2 → 3CO₂ + 4H₂O

According to the equation, 4 moles of water are produced for every mole of propane that is burned.

Let's start by calculating the theoretical yield of water vapor:

If 4 moles of water are produced per mole of propane, then the number of moles of propane burned can be calculated as:

n(propane) = n(water vapor) / 4

n(propane) = (50.0 L) / (24.45 L/mol) / 4

n(propane) = 0.510 mol

Now use the ideal gas law to calculate the volume of propane that was burned:

PV = nRT

Assuming standard temperature and pressure (STP):

P = 1 atm

V = ?

n = 0.510 mol

R = 0.0821 L·atm/mol·K

T = 273 K

Solving for V:

V = nRT/P

V = (0.510 mol)(0.0821 L·atm/mol·K)(273 K) / (1 atm)

V = 11.0 L

However, the volume of water collected represents only 75.5% of the theoretical yield, so the actual volume of propane burned is:

V(actual) = V(theoretical) x (% yield/100)

V(actual) = (11.0 L) x (75.5/100)

V(actual) = 8.30 L

Therefore, the volume of propane burned is 8.30 L (to three significant figures).

Find out more on propane here: https://brainly.com/question/23779346

#SPJ1

Paper used as a writing material is made of pulp (wood).

Paper is a sheet material used for writing on or printing on (or as a non-waterproof container), usually made by draining cellulose fibres from a suspension in water.

Paper is made from cellulose found in trees, which are the main source of cellulose fibre (or woodpulp). Besides woodpulp, paper can be made from other materials such as cotton, flax, esparto, straw, hemp, manilla and jute.

Wood pulp is usually a softwood, used for pulping to make paper.

Learn more about pulp at: https://brainly.com/question/23590026

#SPJ1

The balancing of chemical equations is based on the law of conservation of mass.

How could a chemical process be made to balance out? Which integers can be changed, and which cannot?

When an equation is balanced, the coefficients can only be changed (the numbers in front of molecules or atoms).

The coefficients are indicated by the numerals in front of the molecule. Subscripts are the smaller numerals found following atoms. These cannot be changed while balancing chemical equations!

How is a chemical equation brought to equilibrium?

the algebraic balancing technique. Chemical equations can be balanced by assigning algebraic variables as stoichiometric coefficients to each species in the unbalanced chemical equation.

Equations in mathematics are used to calculate the values of each of these variables

To know more about Conservation of Mass

Visit:

https://brainly.com/question/13383562

#SPJ1

The [H3O+] of a solution with pH = 8.7 is approximately 1.995 x 10^-9 M.

What is ph solution ?

The pH of a solution is a measure of its acidity or basicity. It is defined as the negative logarithm (base 10) of the concentration of hydronium ions, [H3O+], in the solution. Mathematically, pH is expressed as:

pH = -log[H3O+]

where [H3O+] is the concentration of hydronium ions in moles per liter (M) of the solution. pH values range from 0 to 14, where a pH of 7 is considered neutral. A pH value less than 7 indicates acidity, while a pH value greater than 7 indicates basicity or alkalinity. The pH scale is logarithmic, meaning that a change of one unit in pH represents a ten-fold change in the concentration of hydronium ions. For example, a solution with a pH of 3 has ten times more hydronium ions than a solution with a pH of 4.

The pH of a solution is defined as the negative logarithm (base 10) of the concentration of hydronium ions, [H3O+], in the solution. The mathematical expression for this relationship is:

pH = -log[H3O+]

We can rearrange this equation to solve for [H3O+]:

[H3O+] = 10^(-pH)

Substituting the given pH value of 8.7 into this equation, we get:

[H3O+] = 10^(-8.7)

Using a calculator or logarithmic tables, we find that:

[H3O+] = 1.995 x 10^(-9) M

Therefore, The [H3O+] of a solution with pH = 8.7 is approximately 1.995 x 10^-9 M.

To know more about ph visit:-

https://brainly.com/question/172153

#SPJ1

Fossil fuels are essential part of the power generation in the world. They are easily combustible and more reliable and cheaper. However, the burning of fossil fuels releases toxic gases  to the environment.

Fossil fuels are fuel generated from the decomposition materials. Petroleum, coal, natural gas  etc. are fossil fuels which are excavating from the earth.

Fossil fuels are non-renewable sources of energy. Hence, as the existing fossil sources are exhausted no more fossil fuel can be made. It is cheaper, reliable and easy to use.

However, the toxic hydrocarbon gases released from the burning of fossil fuels make the environment polluted. Therefore, overuse of fossil fuel definitely rise the atmospheric pollution.

Its use over the next 50 years, will increase the global warming and more of it will be exhausted.

Find more on fossil fuels :

https://brainly.com/question/3371055

#SPJ1

In 1 mole of calcium carbonate, there are approximately 18.066 x 10^23 moles of oxygen.

To determine the number of moles of oxygen (O) in 1 mole of calcium carbonate (CaCO3), we need to examine the chemical formula of calcium carbonate and identify the number of oxygen atoms present.

The chemical formula of calcium carbonate is CaCO3. In this formula, we have one calcium atom (Ca), one carbon atom (C), and three oxygen atoms (O).

The subscript numbers in the formula indicate the number of atoms for each element. Therefore, we have:

1 calcium atom (Ca)

1 carbon atom (C)

3 oxygen atoms (O)

To calculate the number of moles of oxygen in 1 mole of calcium carbonate, we multiply the number of oxygen atoms (3) by the Avogadro's number, which is approximately 6.022 x 10^23 molecules/mol.

Number of moles of oxygen (O) in 1 mole of calcium carbonate (CaCO3) = 3 moles of oxygen x (6.022 x 10^23 molecules/mol)

Calculating this value, we find:

Number of moles of oxygen (O) in 1 mole of calcium carbonate (CaCO3) ≈ 18.066 x 10^23 moles of oxygen

for more such questions on calcium

https://brainly.com/question/12216405

#SPJ8

As per the balanced equation of the reaction one mole of Mg give s one mole of H2. 1.10 g of magnesium is 0.045 moles. Thus it gives 0.045 moles of H2 which is 1.02 litres.

Magnesium chloride is an ionic compound formed by the reaction of magnesium metal with two moles of hydrochloric acid. The reaction also produce one mole  hydrogen gas.

The atomic mass of magnesium is 24 g/mol. Thus number of moles in 1.10 g is 1.10/24 = 0.045 moles.

As per the reaction equation one mole of magnesium gives one mole of hydrogen gas. Thus 0.045 moles of magnesium gives 0.045 moles of hydrogen gas.

At STP, the volume of one mole of any gas will be equal to 22.4 L. Thus volume of 0.045 moles of hydrogen at STP is:

volume = 0.045 × 22.4

             =1.02 L.

Hence, the volume of hydrogen produce here is 1.02 L.

To find more on magnesium, refer here:

https://brainly.com/question/1533548

#SPJ1

Answer:  The volume occupied at an altitude of 20.0 km is 34.5289 L

Explanation:

Boyle's Law: This law states that pressure is inversely proportional to the volume of the gas at constant temperature and number of moles.

\(P\propto \frac{1}{V}\)     (At constant temperature and number of moles)

where,

\(P_1\) = initial pressure of gas = 101.325 kPa ( sea level)

\(P_2\) = final pressure of gas = 10 kPa

\(V_1\) = initial volume of gas = 3.40774 L

\(V_2\) = final volume of gas = ?

Now put all the given values in the above equation, we get the final pressure of gas.

\(101.325\times 3.40774=10\times V_2\)

\(V_2=34.5289L\)

Therefore, the volume occupied at an altitude of 20.0 km is 34.5289 L

Answer:

  -172.6 °C

Explanation:

You want to know the Celsius equivalent of the temperature 100.6 K.

The relation is ...

  C = K - 273.15

  C = 100.6 -273.15 = -172.55

The temperature is -172.55 °C, about -172.6 °C.

__

Additional comment

We have rounded to tenths, because that is precision of the temperature given. If you use 273 as the conversion constant, you will get -172.4.

The two chemical compounds are not the same, because their ratio is not equal. In both samples the composition of lead and oxygen is different.

A chemical compound is a substance made of numerous similar molecules (or molecular entities) joined by chemical bonds and comprising atoms from various chemical elements. Therefore, a molecule made up of only one type of atom is not a compound. Chemical reactions, which may entail interactions with other molecules, can change a compound into a distinct substance. Atomic bonds may be broken or new ones created during this process.

sample 1 = mass of lead / mass of oxygen = 12.92g/2g = 6.46 .

sample 2 = mass of lead/ mass of oxygen = 34.27 - 14.39/14.39 = 1.38 .

so, the ratios are not the same.

Hence, the two chemical compounds are not the same, because their ratio is not equal. In both samples the composition of lead and oxygen is different.

To know more about Chemical compounds, check out:

https://brainly.com/question/26487468

#SPJ1

Answer:

The term colloidal suspension refers unambiguously to the overall mixture (although a narrower sense of the word suspension is distinguished from colloids by larger particle size). A colloid has a dispersed phase (the suspended particles) and a continuous phase (the medium of suspension).

Explanation:

Answer: 67.5

Explanation:

Brainliest pls

The change in enthalpy when 3 moles of methane react in excess oxygen is -2.67 × 10³ kJ (Option B).

Enthalpy (H) is a thermodynamic property that describes the total heat content of a system at a constant pressure. It is a measure of the energy that is transferred as heat during a chemical reaction or physical change at constant pressure.

Enthalpy is defined mathematically as:

H = U + PV

where U is the internal energy of the system, P is the pressure, and V is the volume. Enthalpy is often measured in units of Joules (J) or kilojoules (kJ).

The given reaction is:

CH4 (g) + 2O2 (g) → CO2 (g) + 2H2O (l) ΔH = -890 kJ

This equation shows that when one mole of methane reacts with two moles of oxygen, it produces one mole of carbon dioxide and two moles of water while releasing 890 kJ of energy.

To determine the change in enthalpy when 3 moles of methane react in excess oxygen, we need to first calculate the amount of heat released when one mole of methane reacts with excess oxygen.

From the balanced chemical equation, we can see that 1 mole of CH4 releases 890 kJ of energy, so the energy released by 3 moles of CH4 would be 3 times that value:

Energy released by 3 moles of CH4 = 3 × (-890 kJ/mol) = -2670 kJ

To know more about internal energy, visit:

https://brainly.com/question/14668303

#SPJ1

The change in enthalpy when 3 moles of methane react in excess oxygen is -2670 kJ.

What is Enthalpy?

Enthalpy is a thermodynamic property of a system that describes the heat content of the system at constant pressure. It is denoted by the symbol "H" and is expressed in units of joules (J) or kilojoules (kJ). Enthalpy is a state function, which means that it depends only on the initial and final states of the system, not on the path taken to reach those states.

The given reaction is: CH4 (g) + 2O2 (g) → CO2 (g) + 2H2O (l), ΔH = −890 kJ

This reaction is for one mole of methane. To find the change in enthalpy when 3 moles of methane react, we need to multiply the enthalpy change by 3:

ΔH = 3 × (-890 kJ/mol) = -2670 kJ

Therefore, the change in enthalpy when 3 moles of methane react in excess oxygen is -2670 kJ.

Learn more about Enthalpy from given link

https://brainly.com/question/14047927

#SPJ1

Cu + O2 --->  CuO2 -The first reaction is a combustion reaction

2 HCl + Mg → H2 + MgCl2- The second reaction is a Single replacement reaction

A combustion reaction is a type of chemical reaction that occurs between a fuel and an oxidizer in the presence of heat or light, resulting in the release of energy in the form of heat and light.

In other words, it is a reaction in which a substance reacts with oxygen to produce heat and light.

Combustion reactions are important in many aspects of daily life, including the burning of fossil fuels for energy production, the combustion of wood or other materials for heating or cooking, and the combustion of fuels in internal combustion engines.

Learn more about combustion reaction:https://brainly.com/question/30562669

#SPJ1

So, the number of particles in a mole is about 80,000 the number of grains of sand on Earth’s beaches.

How to slove and Compare the value you calculated for the number of sand grains on Earth's beaches to the number of particles In mole?

Using sand grains that take up space of 1 mm, when these sand grains are laid side by side, there are about 1000 grains of sand per m, 1000000 per square m and 1000 × 1000 × 1000 per cubic m.

That is 10⁹ grains of sand per cubic meter.

An average beach has sand volume of (1.875 × 10⁷) cubic metres

There are over 400 beaches in the world, Using an estimate of 400 beaches

The number of grains of sand on Earth's beaches = 10⁹ × 400 × 1.875 × 10⁷

There are approximately (7.5 × 10¹⁸) grains of sand on all of the world's beaches

Then, Avogadro's number found that 1 mole of all particles contain

(6.022 × 10²³) particles.

So, the number of particles in a mole is about [(6.022 × 10²³)/(7.5 × 10¹⁸)]

the number of grains of sand on Earth’s beaches.

So, the division gives, (8.0 × 10⁴).

Learn more about mole number, grain number

https://brainly.com/question/16237513

#SPJ9

The net ionic equation for the reaction between potassium sulfide and magnesium iodide is S2- + Mg2+ -> MgS, as the potassium and iodide ions are spectator ions and do not participate in the reaction.

To determine the net ionic equation for the reaction between potassium sulfide (K2S) and magnesium iodide (MgI2), we first need to identify the ions present in each compound and then determine the products formed when they react.

Potassium sulfide (K2S) dissociates into two potassium ions (K+) and one sulfide ion (S2-):

K2S -> 2K+ + S2-

Magnesium iodide (MgI2) dissociates into one magnesium ion (Mg2+) and two iodide ions (I-):

MgI2 -> Mg2+ + 2I-

Now, we need to determine the possible products when these ions combine. Since potassium (K+) has a +1 charge and iodide (I-) has a -1 charge, they can combine to form potassium iodide (KI):

K+ + I- -> KI

Similarly, magnesium (Mg2+) and sulfide (S2-) can combine to form magnesium sulfide (MgS):

Mg2+ + S2- -> MgS

Now, we can write the complete ionic equation by representing all the ions present before and after the reaction:

2K+ + S2- + Mg2+ + 2I- -> 2KI + MgS

To obtain the net ionic equation, we remove the spectator ions, which are the ions that appear on both sides of the equation and do not participate in the actual reaction. In this case, the spectator ions are the potassium ions (K+) and the iodide ions (I-).

Thus, the net ionic equation for the reaction between potassium sulfide and magnesium iodide is:

S2- + Mg2+ -> MgS

For more such questions on  ionic equation visit:

https://brainly.com/question/25604204

#SPJ8

Answer:

73.33% is the percent yield

Explanation:

Percent yield is defined as:

Actual yield (4.883g) / Theoretical yield * 100

Based on the reaction:

Cu(NO₃)₂(aq) + K₂CO₃(aq) → CuCO₃(s) + 2KNO₃(aq)

1 mole of copper nitrate reacts per mol of potassium carbonate.

To solve this question we must find limiting reactant. With limiting reactant we can find the theoretical moles of solid produced and its mass as follows:

Moles Cu(NO₃)₂:

0.1639L * (0.329mol / L) = 0.0539 moles

Moles K₂CO₃:

0.1639L * (0.528mol / L) = 0.0865 moles

As the reaction is 1:1, the limiting reactant is Cu(NO₃)₂.

1 mol of Cu(NO₃)₂ produces 1 mol of CuCO₃. That means theoretical moles produced are 0.0539 moles. And the mass is:

Mass CuCO₃ -Molar mass: 123.55g/mol-

0.0539 moles * (123.55g / mol) = 6.659g of CuCO₃ is the theoretical mass

And percent yield:

4.883g / 6.659g * 100

Answer:

Explanation:

The number of electrons in the outermost shell of a particular atom determines its reactivity, or tendency to form chemical bonds with other atoms.

To achieve stability Na⁺ looses its electron to chlorine ion to complete its octet, and cl⁻ gain electron from sodium ion to complete its octet, so option A and B both are right.

What is electronic configuration ?

According to electronic configurations, each electron moves individually within an orbital while being surrounded by an average field produced by all other orbitals.

The octet rule can be better understood by considering the electron configurations of sodium and chloride ions, which are the main ingredients of table salt ( NaCl ).

The Na+ ion has an electron configuration of 1s₂, 2s₂ ,2p₆ after sodium     ( Na ), with an electron configuration of 1s₂, 2s₂, 2p₆, 3s₁, loses its outermost 3s electron.

So, chlorine atom gain one electron from sodium atom to complet octet and become stable.

Hence, option  A and B both are correct.

To learn more about electronic configuration follow the link below;

https://brainly.com/question/28045031

#SPJ2