Electrons have single negative charges. What does this mean?

The molecular formula of a compound is a whole number multiple of its empirical formula. The empirical formula of the hydrocarbon is C₄H₉.

The empirical formula of a compound can be defined as the formula which gives the simplest whole number ratio of atoms of various elements present in one molecule of the compound.

Here moles of 'C' = moles 'CO₂' = 6.16 / 44 = 0.14 moles

Moles of 'H' = 2 × moles 'H₂O' = 2 × 2.84/18.02 = 0.315 moles

Divide both number of moles by 0.14. Then we get

1 mol 'C' and 2.25 mol 'H'

Multiply both with 4 to obtain a whole number.

Then the number of carbon is 4 and that of hydrogen is 9.

Thus the empirical formula is C₄H₉.

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Answer:

Explanation:

the difference is below:

Answer:Answer choices are:

A. These elements did not fit in with his pattern.

B. These elements are gases and he didn't include gases.

C. The atoms of these elements had no atomic mass.

D. These elements had not yet been discovered.

___________________________________________________________

Correct answer choice is:

D. These elements had not yet been discovered.

Answer:

They would probably be equal L and D stereoisomers

Explanation:

All amino acid (except glycine) can occur in two isomeric forms called L- and D- forms, because of the possibility of forming two different enantiomers around the central carbon atom known as the chiral center. The two enantiomers, have identical physical and chemical properties, but their interactions with other chiral molecules may vary.

A carbon chiral center occcurs when the carbon is bonded to four different substituents. Glycine, has no enantiomers because it has two hydrogen atoms attached to the central carbon atom.

When a compounds with chiral centers are synthesized in the laboratory randomly (in the absence of a directing template) left and right-handed molecules ( corresponding to L- and D- forms) of a compound will form in equal amounts known as a racemic mixture. This was the case when Louis Pasteur in 1848, investigated the crystalline sediment that accumulated in wine casks called paratartaric acid or racemic acid, a form of tartaric acid.

Answer:

This is your answer ☺️☺️☺️

Answer:

-23.15

Explanation:

Answer:

1)30

2)

3)32.3

4)20.8

5)52.5

6)42.6

7)

8)11

9)3.5

10)12.75

Explanation:

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the blank spaces are which I don't understand that diagram

The molarity of the NaOH(aq) solution is 0.156 M.

The balanced equation for the reaction between sulfuric acid and sodium hydroxide is H₂SO₄(aq) + 2NaOH(aq) → Na₂SO₄(aq) + 2H₂O(l). From the balanced equation, it can be deduced that the mole ratio of NaOH to H₂SO₄ is 2:1. Hence, the moles of H₂SO₄ reacted = Molarity of H₂SO₄ × Volume of H₂SO₄ used in liters = 0.220 M × 0.03230 L = 0.007106 moles.

Using mole ratio, the moles of NaOH reacted = 2 × 0.007106 = 0.01421 moles. Molarity of NaOH = Moles of NaOH / Volume of NaOH used in liters= 0.01421 moles / 0.04630 L = 0.306 M or 0.156 M (rounded off to three significant figures). Thus, the molarity of the NaOH(aq) is 0.156 M.

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The electronic configuration of the iron(III) ion is [Ar]3d5. This can be determined by considering the electronic structure of neutral iron (Fe), which has the electron configuration [Ar] 4s23d6. So the first option is correct answer.

So, the correct choice is first option [Ar]3d5 for the electron configuration of the iron(III) ion.

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Answer:

This answer is 108g mass of aluminum is produced from 100g of aluminum oxide

To convert from parts per million (ppm) of calcium carbonate to grains per gallon (GPG), we use the following formula:

Hardness in GPG = Hardness in ppm / 17.14

Since we do not have the hardness in ppm, we cannot directly convert to GPG. We need more information or data to calculate the hardness in GPG.

Without the ppm of calcium carbonate, we cannot determine the hardness in grains per gallon.

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Freezing point of a solution containing 1.25 g1.25 g of benzene (C6H6)(C6H6) in 100 g100 g of chloroform (CHCl3)(CHCl3) is -64.249°C.

To register a frozen edge for a plan, you must use the recipe for frozen edges for discouragement.

ΔTf = Kf * molality

where ΔTf is the freezing edge for despair and Kf is the freezing edge for despair. As can be expected for soluble substances, molality is the molal mixture of solutes.

First we have to deal with the molality of the plan.

molality = moles of solute/mass of solute (kg)

The mass of chloroform is 100 g, which is equivalent to 0.1 kg.

molarity = 0.016 mol/0.1kg = 0.16 mol/kg

The reliable freezing point of chloroform for rejection of

is 4.68 K*kg/mol.

ΔTf = 4.68K*kg/mol * 0.16mol/kg = 0.749 K

The freezing limit of pure chloroform is 63.5°C. So the game plan frozen edge is frozen edge = - 63.5°C - 0.749°C = - 64.249°C

So the freezing point of the plan is -64.249°C.

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The overall dipole moment of the water molecule is shown in the image attached.

We know that there is a dipole that exists in a molecule when there is an electronegativity difference between the atoms that are in the molecule. In the case of the water molecule, there is an electronegativity difference that exists between the atoms of the water molecule.

Now, hydrogen is the positive end of the dipole and the oxygen is the negative end of the dipole. We have seen the structures of the dipole moment. Now, the overall dipole moment of the water molecule is shown in the image attached.

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The best proof that a chemical reaction has occurred based on the observations above is: Small, solid particles formed and fell to the bottom of the beaker.

Chemical reactions occur when the chemical composition of a substance changes.

What is the best proof that a chemical reaction has occurred based on the following observations?

Students mixed two liquids in a beaker and listed their observations. Observations Liquid 1 was colorless. Liquid 2 was colorless. The mixture of liquids 1 and 2 formed a colorless solution. Small, solid particles formed and fell to the bottom of the beaker.

When two liquids are mixed and a solid forms, that is the best indication that a chemical reaction has occurred. This indicates a precipitation reaction has occurred in which an insoluble substance forms from a solution. This chemical reaction occurs when two aqueous solutions are mixed and the resulting solution becomes a solid compound called a precipitate.  Precipitation reactions are one type of double replacement reaction that occurs in water solutions.

                                               Therefore, the best proof that a chemical reaction has occurred based on the observations above is: Small, solid particles formed and fell to the bottom of the beaker.

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Actually, no. While their mass may be the same (1kg), the volume of lead is a lot smaller than that of feathers. As there is the same mass stuffed in a smaller space, it must be denser. The density of water is 1 g/cm3, so if the density of the lead is more than 1g/cm3, it has to sink

Answer: ummmmmm hmmmmm

Explanation:

Answer:

This took forever T-T

Explanation:

1. The condition of the soil has a big impact on the environment. Good soil helps plants grow, supports different kinds of life, and prevents erosion. It also keeps nutrients in balance and affects the quality of water and air. If the soil is unhealthy or polluted, it can harm plants, animals, and the overall ecosystem.

2. The dodo bird is an example of a species that no longer exists. It used to live on an island called Mauritius. Sadly, people hunted the dodo bird for food and destroyed its habitat. They also introduced other animals that harmed the dodo bird's population. Because of these reasons, the dodo bird became extinct. This affected the environment because the dodo bird played a role in spreading seeds and helping plants grow.

3. The Sumatran orangutan is a species in danger of disappearing. Its biggest threats are losing its home due to forests being cut down for palm oil, illegal hunting, and being taken as pets. People are working to protect the orangutans by preserving their habitat, rescuing and rehabilitating them, and educating communities about their importance.

4. Central Park in New York City is a natural area created in 1857. It was made for people to enjoy nature in the middle of the city. People can do many outdoor activities there like walking, picnicking, and playing sports. The park is also home to various birds and animals, which adds to the city's biodiversity.

5. When a certain environment, like a forest or a desert, is damaged or in danger, it has a big impact on the whole ecosystem. Many different plants and animals depend on each other in these environments. If something harms or destroys their homes, it can lead to the loss of species, disruption of food chains, and less diversity. It can also affect important processes like water and carbon cycles, and even influence the climate. People who rely on these environments for resources and livelihoods are also affected. That's why it's important to protect and take care of these natural areas.

Answer:

The total energy stays the same.

option (c) - attack of bromide ion on carbon three

The addition of HBr to 3-methyl-3-hexene proceeds via a Markovnikov addition mechanism, where the hydrogen (H) atom of HBr adds to the carbon atom with the most hydrogen atoms, and the bromide (Br) ion adds to the carbon with the least hydrogen atoms. The reaction proceeds in two steps:

The H atom of HBr adds to the double bond to form a carbocation intermediate. The addition of H+ leads to the formation of a secondary carbocation, which can form at either carbon 3 or carbon 4.

The Br- ion then attacks the carbocation to form the final product. The bromide ion will preferentially attack the carbocation at carbon 3, as it is more stable than the carbocation at carbon 4.

Therefore, the answer is option (c) - attack of bromide ion on carbon three.

The mechanism for the addition of HBr to 3-methyl-3-hexene is as follows:

Step-1

CH3          H

|            |

CH3CH2C(CH3)CH=CH2  +  HBr  -->  CH3CH2C(CH3)CH(H)CH2Br+

                      carbocation intermediate forms here

Step 2

CH3          H  Br

|            |   |

CH3CH2C(CH3)CH(H)CH2Br+  -->  CH3CH2C(CH3)CH(Br)CH2CH3

                                   final product forms here

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Answer:

A: Add a substance to the wash that reduces the number of charges transferred.

Explanation:

The attraction between opposite charges make the clothes attract together. To reduce them Increase the temperature of the air in the dryer to weaken the electric forces. Hence, option A is correct.

An electric dryer is used to dry the clothes and hair or other substances using electric current. A substance can have both negative and positive charges. The opposite charges will attract together while the negative charges repel.

By exposing clothes to electric dryer it will gain electrons from the dryer and the positive poles of the clothes will attracts it. The electric current from the dryer will make clothes temporarily polarised.

If temperature increases, the intermolecular force of attraction decreases by making the kinetic energy of molecules raised. Therefore by increasing the temperature of air from the dryer the attraction can be reduced.

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A. The theoretical yield of PbO is 232.08 grams.

B. The percent yield of PbO is 73.26%.

A. Determine the theoretical yield of PbO if 50g of O2 is used:

We first need to determine the molar mass of O2, which is 32 g/mol (16 g/mol per oxygen atom).

Next, we can set up a stoichiometric ratio using the balanced equation:

2 moles of PbS react with 3 moles of O2 to produce 2 moles of PbO.

Using the molar ratio, we can calculate the moles of O2 used:

moles of O2 = (mass of O2 used) / (molar mass of O2)

moles of O2 = 50 g / 32 g/mol = 1.5625 mol

From the stoichiometry, we know that 2 moles of PbO are produced for every 3 moles of O2.

Therefore, the moles of PbO produced can be calculated as follows:

moles of PbO = (moles of O2) × (2 moles of PbO / 3 moles of O2)

moles of PbO = 1.5625 mol × (2/3) = 1.0417 mol

Finally, we can calculate the theoretical yield of PbO using its molar mass:

theoretical yield of PbO = (moles of PbO) × (molar mass of PbO)

theoretical yield of PbO = 1.0417 mol × 223.2 g/mol = 232.08 g

Therefore, the theoretical yield of PbO is 232.08 grams.

B) Calculate the percent yield if 170.0 g of PbO is obtained:

The percent yield is calculated by dividing the actual yield by the theoretical yield, then multiplying by 100%:

percent yield = (actual yield / theoretical yield) × 100%

percent yield = (170.0 g / 232.08 g) × 100% = 73.26%

Therefore, the percent yield of PbO is 73.26%.

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Answer:

Symbol: Sr2+

Element: Strontium

Explanation:

Strontium will have 38 protons, 38 electrons, and the neutron will depend on the isotope but there will usually be 48, 49, or 50 neutrons

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Answer:

B

Explanation:

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Answer:

the answer is C.

Explanation:

Answer: I think the answer would be C

Explanation: The answer is C because of the fact that mixtures are 2 or more substances that are combined and they will have several different types of substances and other chemicals in there. Also if you have a mixture well then it probably will have more than just 1 different kind or different types of properties inside of the mixture and inside the substances as well. If you do have a chemical change or chemical reaction then that can indeed separate any or maybe even all of the different molecules and the mixtures as well. Hoped i helped:)