draw a six carbon alkyne that can exist as diastereomers

The moles would be 12 moles, 4 moles and 11.34 moles

When hydrogen gas (H2) reacts with oxygen gas (O2) to produce water (H2O), the balanced chemical equation is:

2H2 + O2 -> 2H2O

So,

For every 6 moles of H2, 12 moles of H2O will be produced

For every 2 moles of H2, 4 moles of H2O will be produced

For every 5.67 moles of H2, 11.34 moles of H2O will be produced.

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You would need roughly 202 ml of water to dissolve 72 grams of salt at 25 degrees Celsius.

The solubility of the compound, salt in water at 25 degrees Celsius is stated to be 357 grams per liter (g/L).

Then we can say that 357 grams of salt can be dissolved in 1 liter (1000 milliliters) of water.

To find out how much water you need to dissolve 72 grams of salt, solve the ratio as

357 g : 1000 mL = 72 g : x mL

Solving for x gives:

x = (72 g × 1000 mL) / 357 g

x = 201.681 mL

If we approximate this value it becomes 202ml

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The federal government tried to appease conservationists and businesses in its land-use policies.

A form of government in which power is distributed between a central authority and a number of constituent territorial units.

During the early times of the Gilded Age, the government agency workers felt pressure and uncertainty between the interests of businesses and conservationists due to the reason that the federal government were dependent on the contributions from businesses. On the contrary, conservation efforts are being favoured more by the voters.

The federal government influences interest rates and then it takes six months for the economy to pick that up and that provides steady growth and good GDP for the USA.

The federal government does not fix prices for products. The fed tries to fix interest rates.

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Answer: it’s A

Explanation:

Answer:

It's A

Explanation:

In the solid phase, the atoms of a substance are closely packed together and held in a fixed position by intermolecular forces. In the case of ice, which is a solid form of water, the atoms are arranged in a regular pattern, forming a crystal lattice structure.

The motion of atoms in the solid phase is limited to small vibrations around their fixed positions. These vibrations are caused by thermal energy, but they are not significant enough to overcome the intermolecular forces that hold the atoms in place. As a result, the shape of the solid, including ice, is definite and maintains a fixed shape.

The volume or amount of space taken up by a solid, including ice, is also definite. The intermolecular forces between the atoms prevent them from moving around freely, and as a result, the solid has a fixed volume.

Overall, in the solid phase, such as ice, the arrangement of atoms is regular and fixed, and their motion is limited to small vibrations around their fixed positions. The volume or amount of space taken up is definite, and the shape is also definite and maintains a fixed shape.

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The different products obtained during electrolysis of molten and aqueous NaCl are due to the presence of water molecules and the resulting different reactions that occur at the electrodes.

The reason why different products are obtained when molten and aqueous NaCl is electrolyzed lies in the difference in the behavior of the ions present in these two forms of NaCl. When molten NaCl is electrolyzed, only the Na+ and Cl- ions are present, and these ions are free to move about in the molten state. Thus, both Na+ and Cl- ions are reduced and oxidized respectively at the electrodes, leading to the formation of metallic sodium and chlorine gas. On the other hand, when aqueous NaCl is electrolyzed, the Na+ and Cl- ions are surrounded by water molecules, which form a solvation shell around the ions, preventing them from moving freely. As a result, only the water molecules are electrolyzed, producing hydrogen gas at the cathode and oxygen gas at the anode. Thus, the different products obtained when molten and aqueous NaCl is electrolyzed are due to the presence or absence of water molecules that surround the ions and affect their behavior during electrolysis.

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Answer: The Mass of an electron is 9.1093837 x 10^-31 kgs

Explanation:

Answer:

b

Explanation:

Answer:

ita b

Explanation:

trust fam

Answer: Argon-52

Explanation: Its B

Answer:

Mass of lime produced = 19.0 g

Explanation:

Given data:

Mass of lime produced = 11.2 g

Mass of limestone react = ?  

Solution:

Chemical equation:

CaCO₃     →      CaO + CO₂

Balanced chemical equation:

CaCO₃     →      CaO + CO₂

Number of moles of lime:

Number of moles = mass / molar mass

Molar mass of lime 56.1 g/mol

Number of moles = 11.2 g/ 56.1 g/mol

Number of moles = 0.19 mol

Now we will compare the moles of CaO and CaCO₃  from balance chemical equation.

                    CaO        :           CaCO₃

                      1             :             1

                     0.19          :          0.19

Mass of limestone react:

Mass = number of moles × molar mass

Mass = 0.19 mol × 100.1 g/mol

Mass = 19.0 g

Urban development has been linked to many environmental problems, including air pollution, water pollution, and loss of wildlife habitat. Urban runoff often contains nutrients, sediment and toxic contaminants, and can cause not only water pollution but also large variation in stream flow and temperatures.

Answer:

light grey

Explanation:

cause it just got mixed

When mixed polycarboxylate cement is mixed correctly, it should have a syrup-like in consistency, which thickens as it sets.

One for the few dental fillings that exhibits real adherence to tooth structure is polycarboxylate cement. The liquid consists polyacrylic acid and a copolymer made from that acid, while the powder is predominantly zinc oxide. As filling substances, protective cavity lines, luting materials as crowns, bridges, inlays, and orthodontic appliances, as well as for root canal fillings and pulp capping, they are also employed in these procedures. When mixed polycarboxylate cement is mixed correctly, it should have a syrup-like in consistency, which thickens as it sets.

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Explanation:

H2O:

2 H2O shows 2 atoms of hydrogen. The number 2 in front of it means 2 moles of H2O

----------

CHA:

It only shows 1 atom of hydrogen

1 CHA means 1 mole of CHA

2 CHA means 2 moles of CHA

----------

HO2:

It only shows 1 atom of hydrogen

---------

H2SO4:

It shows 2 atoms of hydrogen

Answer:

H2O

H2SO4

The formation of a solid from two liquids will be a chemical change since a precipitate is formed, creating something new.

Answer:

12 Ethene gas, CH is completely burned in excess oxygen to form carbon dioxide and water

The equation for this exothermic reaction is shown.

CH 30, - 200, 2H,0

The table shows the bond energies involved in the reaction

bond

bond energy

(kJ/moly

614

413

C-C

CHH

0 0

СО

495

799

O-H

467

What is the total energy change in this reaction?

A-954 kJ/mol

B-1010 kJ/mol

C-1313 kJ/mol

D-1359 kJ/mol

Explanation:

thats all you said

The electrophile that is used to make the acetophenone from the benzene is the CH₃CO⁺.

The Acetophenone is the carbonyl compound in which the the group called as the ketone group is attached directly to  the benzene ring. The catalyst that is used in the production of the acetophenone is the anhydrous aluminum chloride. This type of the reaction is a type of the electrophilic substitution reaction. The Electrophiles are the electron-deficient species and that are attracted to the electron - rich center. The electrophiles will accepts the electron pair.

The electrophile is CH₃CO⁺ that is used in the production of the acetophenone from benzene.

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Depending on the chemical, these longer-term health effects might include:

The number of moles of PbSO₄(s) precipitated from the resulting solution would be 0.0141 moles.

A precipitation reaction will take place in which the Na₂SO₄(aq) and Pb(NO₃)₂(aq) will react and form PbSO₄(s) solid and NaNO₃(aq).

This is the balanced chemical reaction that takes place:Na₂SO₄(aq) + Pb(NO₃)₂(aq) → PbSO₄(s) + 2NaNO₃(aq)

We first need to determine the number of moles of Na₂SO₄(aq) that is available:0.0200 L × 0.00187 mol/L = 3.74 × 10⁻⁵ mol Na₂SO₄(aq)

Since the reaction has a 1:1 molar ratio between Na₂SO₄(aq) and PbSO₄(s), the number of moles of PbSO₄(s) that will form will be the same.

Therefore, 3.74 × 10⁻⁵ mol PbSO₄(s) will form.In order to calculate the mass of PbSO₄(s) that will precipitate out, we can use the formula:m = n × MM

where m = mass in grams, n = number of moles, and MM = molar mass of PbSO₄The molar mass of PbSO₄ is:1 Pb + 1 S + 4 O = 207.2 g/molSo, mass of PbSO₄(s) = 0.00775 g

We can use the solubility product constant (Ksp) to determine if all of the PbSO₄(s) will precipitate out.Ksp = [Pb²⁺][SO₄²⁻] = 2.5 × 10⁻⁸[Pb²⁺] = [SO₄²⁻] = xMoles of Pb²⁺ and SO₄²⁻ = 0.0141 mol

The molarity of PbSO₄(s) is thus:0.0141 mol ÷ 0.051 L = 0.276 M

This is greater than the Ksp of 2.5 × 10⁻⁸, so not all of the PbSO₄(s) will precipitate out.

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Answer:

Brainliest A and I want brainliest please

Explanation:

That pull is gravity at work. Every object in the universe that has mass exerts a gravitational pull, or force, on every other mass. The size of the pull depends on the masses of the objects. You exert a gravitational force on the people around you, but the Gravity or gravitational forces are forces of attraction. We're not talking about finding someone really cute and adorable. It's like the Earth pulling on you and keeping you on the ground. That pull is gravity at work.

Every object in the universe that has mass exerts a gravitational pull, or force, on every other mass. The size of the pull depends on the masses of the objects. You exert a gravitational force on the people around you, but that force isn't very strong, since people aren't very massive. When you look at really large masses, like the Earth and Moon, the gravitational pull becomes very impressive. The gravitational force between the Earth and the molecules of gas in the atmosphere is strong enough to hold the atmosphere close to our surface. Smaller planets, that have less mass, may not be able to hold an atmosphere.at force isn't very strong, since people aren't very massive.

Obviously, gravity is very important on Earth. The Sun's gravitational pull keeps our planet orbiting the Sun. The motion of the Moon is affected by the gravity of the Sun AND the Earth. The Moon's gravity pulls on the Earth and makes the tides rise and fall every day. As the Moon passes over the ocean, there is a swell in the sea level. As the Earth rotates, the Moon passes over new parts of the Earth, causing the swell to move also. The tides are independent of the phase of the moon. The moon has the same amount of pull whether there is a full or new moon. It would still be in the same basic place.

Answer:

Al2O3 ⇒ Aluminum Oxide

Explanation:

Balanced equation ⇒ 4Al + 3O2 --> 2Al2O3

If the typed stuff are confusing, see the attached pics.

Answer:

B

Explanation:

The molar mass of the gas, given that 3.25 g of the gas occupied 2.56 L is 30.66g/mol

To obtain the molar mass of the gas, we shall first obtain the number of mole of the gas. This can be obtained as follow:

PV = nRT

0.95 × 2.56 = n × 0.0821 × 280

Divide both sides by (0.0821 × 280)

n = (0.95 × 2.56) / (0.0821 × 280)

n = 0.106 mole

Haven obtain the mole of the gas, we shall determine the molar mass of the gas as follow:

Molar mass = mass / mole

Molar mass of gas = 3.25 / 0.106

Molar mass of gas = 30.66g/mol

Thus, the molar mass of the gas is 30.66g/mol

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Answer:

a one rotation of the planet on its axis

Explanation:

The two types of motion that planets undergo are;

1) rotation of the planet about its axis

2) revolution of the planet around the sun.

In every planet there are days as shown in the image attached to the question. However, the length of day in each planet is determined by the time required for the planet to complete one rotation on its axis.

It takes the earth 1 earth day (24 hours) to complete rotation on its axis.

The total work produced by the steam engine needs to be calculated and given that the steam engine accepts heat during isothermal expansion at 250 °C and discards heat through isothermal compression at 25 °C.

The magnitude of the entropy change during the isothermal compression step is 750 J/K. The efficiency of the steam engine is 65% of the maximum attainable theoretical efficiency. Given that the efficiency of the steam engine is 65% of the maximum attainable theoretical efficiency.

Hence, the actual efficiency will be:

η_actual = η_max × 0.65Where,

η_max is the maximum attainable theoretical efficiency.

η_actual = 0.65 × η_maxNow,

the efficiency of a Carnot engine (η_Carnot) can be given as:η_Carnot = 1 - (T_cold / T_hot)Here, T_hot and T_cold are the temperatures of the hot and cold reservoirs respectively.

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Work is a measure of the energy transfer that occurs when an object is moved against a force. Work is defined as the product of the force applied to an object and the displacement of the object in the direction of the force. Hence the total work produced by the engine is 47,175 J.

1. Converting the temperatures from degrees Celsius to Kelvin.

T1 = 250 °C + 273.15 K = 523.15 K

T2 = 25 °C + 273.15 K = 298.15 K

2. The maximum attainable theoretical efficiency.

ηmax = 1 - T2 / T1 = 1 - 298.15 / 523.15 = 42.9%

3. The efficiency of the steam engine.

η = 0.65 * ηmax = 0.65 * 42.9% = 27.7%

4. The entropy change during the isothermal expansion step.

dS = 750 J/K

5. The total work produced by the engine.

W = η * (T1 - T2) * dS = 0.277 * (523.15 - 298.15) * 750 J/K = 47,175 J

Therefore, the total work produced by the engine is 47,175 J.

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Answer:

Boiling

Explanation:

It's a phase transition from the liquid to gas once at or above the boiling temperature. Boiling is the rapid vaporization of a liquid once heated to its boiling point.

The heat of reaction (ΔH) for the given reaction is 180.4 kJ/mol. To calculate the heat of reaction (ΔH) for the given reaction:

CCl₄(g) + H₂O(g) -> CHCl₃(g) + HCl(g)

You would need the standard enthalpies of formation for each compound involved in the reaction. The standard enthalpy of formation (ΔHf) is the enthalpy change when one mole of a compound is formed from its elements in their standard states.

Here are the standard enthalpies of formation for the compounds involved:

ΔHf[CCl₄(g)] = -135.5 kJ/mol

ΔHf[H₂O(g)] = -241.8 kJ/mol

ΔHf[CHCl₃(g)] = -104.7 kJ/mol

ΔHf[HCl(g)] = -92.3 kJ/mol

To calculate ΔH for the reaction, you need to sum up the enthalpies of formation of the products and subtract the sum of the enthalpies of formation of the reactants:

ΔH = ΣΔHf(products) - ΣΔHf(reactants)

ΔH = [ΔHf[CHCl₃(g)] + ΔHf[HCl(g)]] - [ΔHf[CCl₄(g)] + ΔHf[H₂O(g)]]

ΔH = [(-104.7 kJ/mol) + (-92.3 kJ/mol)] - [(-135.5 kJ/mol) + (-241.8 kJ/mol)]

ΔH = -196.9 kJ/mol - (-377.3 kJ/mol)

ΔH = 180.4 kJ/mol

Therefore, the heat of reaction (ΔH) for the given reaction is 180.4 kJ/mol.

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Answer:

The answer is option A

Colorful feathers

Hope this helps you

To determine the color of the solution when a drop of bromocresol green is added to a 0.16 M NaOH solution, we need to consider the pH range of the indicator.

Step 1: Calculate the pH of the NaOH solution. NaOH is a strong base, so it will dissociate completely. The formula to find pH is:

pH = -log10[H+]

Since it's a base, we need to find the pOH first:

pOH = -log10[OH-]

For 0.16 M NaOH, [OH-] = 0.16 M. So, the pOH is:

pOH = -log10(0.16) ≈ 0.80

Now, we can find the pH:

pH = 14 - pOH = 14 - 0.80 ≈ 13.2

Step 2: Compare the pH with the indicator's range. Bromocresol green is yellow below pH 3.8 and blue above pH 5.4. Since the pH of the NaOH solution is 13.2, it falls in the "blue" range.

In conclusion, when a drop of bromocresol green is added to a 0.16 M NaOH solution, the solution will turn blue.

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When a drop of bromocresol green is added to a solution of 0.16 M NaOH, it will turn blue.

NaOH is a strong base with a pH of around 14.

Therefore, it will completely dissociate in water to form hydroxide ions (OH-). When bromocresol green is added to this solution, the hydroxide ions will react with the indicator and shift the pH above 5.4, causing it to turn blue.
The addition of bromocresol green to a solution of 0.16 M NaOH will turn the solution blue due to the high pH of the solution.
Bromocresol green indicator will turn blue in a 0.16 M NaOH solution.
Bromocresol green changes color based on the pH of the solution it is in. It is yellow below pH 3.8 and blue above pH 5.4. Since NaOH is a strong base, it will raise the pH of the solution above 5.4, causing the bromocresol green to turn blue.

Hence,  In a 0.16 M NaOH solution, bromocresol green will turn blue due to the high pH.

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Answer: Air pollution is the main cause of rise in temperature over the past century.

Explanation:

Due to increase in the industrialization in different countries of the world and also burning of more fossil fuels in the engines of vehicles and jets are the main reason of increasing global temperature. Both industries and vehicles produce high amount of carbondioxide which is a greenhouse gas that blocks the passage of reflected radiation from the earth surface and traps this radiation which increases the temperature of the earth.

The net ionic equation for the complete neutralization reaction between the strong acid hno3 (aq) and the strong base ba(oh)2 (aq) is 2H+ +2OH- --->H2O(l) and the driving force for the reaction is formation of H2O(l)

The net ionic equation for the complete neutralisation reaction between strong acid HNO3(aq) and Ba(OH)2 (aq) is as follows;

Ba(OH)2(aq)+HNO3(aq)---Ba(NO3)2(aq)+2H2O(l)

Splitting into ions, we get

Ba2+ + 2OH- +H+ +NO3- --- Ba2+ +2NO3- +2H2O(l)

The net ionic equation is 2H+ +2OH- --->H2O(l)

The driving force of this reaction is equivalent of acids is reacting with equivalents of base and hence neutralisation reaction takes place.

The driving force for this neutralisation reaction is formation of H2O(l)

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