Draw two lewis structures for a compound with the formula c4h10. No atom bears a charge, and all carbon atoms have complete octets. Include all hydrogen atoms.

Answer:

No....see below

Explanation:

Well not quite.... that would be a solar eclipse....when the Earth shadows  the moon from the Sun is a lunar eclipse

Answer:

A Carbon

Explanation:

Answer: plastic

Explanation:

The thermal conductivity of a material is highly depending on composition and structure. Generally speaking dense material such as medals and stone are good conductors of heat while load density substances such as gas and porous installations are poor conductors of heat

Answer:

Or plastic

Explanation:

May be useful................

[tex]\text{Mg(OH)}_2 + 2\text{HNO}_3 \rightarrow \text{Mg(NO}_3)_2+ 2\text{H}_2 \text{O}[/tex]

Answer:

Yes

Explanation:

It does because of the fact that plants need water to live and the grow. Water helps the plant grow, and certain plants would need less or more water based on their roots, leaves, and tempurature tolerancy.

Answer:  Yes,

Roots need both water and oxygen, and when surrounded by water, they cannot take up oxygen.  Plants may slow in growth after a flush of new growth or a heavy flowering. During these periods and while it is dormant, a plant will need less water.  

Devices that use a liquid spray to remove pollutants from the air are called scrubbers. The correct option is C.

Wet scrubber is a pollution removing technique from the air. It is a sprayer which trap the harmful gas molecules from the air.

It is used in factories and industrial exhaust steams.

Thus, the correct option is C. scrubbers.

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Answer:

If in volume of 10.0L it is 25°C than it will be 37.5C volume in the new temperature if increased from 10.0L to 15.0L

Explanation:

10.0L=25°C

15.0L=?

10×2.5= 25

15×2.5=37.5

Kelvin(K)= C+273=T

=37.5+275=312.5

=C=312.5-275

=C=37.5

Answer:

B .it is an exothermic reaction

Explanation:

i need brainleyest

Answer: 66

Explanation: To find the mass number you would have to add the number of protons and the number of neutrons.

Acids and bases are the property of the solution based on the concentration of the ions. Solution IV is the most concentrated base as it has the highest concentration of hydroxide ions.

Bases are substances or solution that has the potential of hydrogen above 7 on the pH meter scale. It has more hydroxide ions than hydronium or hydrogen ions.

The higher the hydroxide concentration lower will be the pOH and the more alkaline will be the solution. The hydroxide ions have more electrons and can donate some to other species.  

Therefore, solution IV is a concentrated base because of high hydroxide ion concentrations.

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Answer:

pH = 10.63.

Explanation:

Recall that lithium hydroxide (LiOH) is a strong base and hence dissociates completely into Li⁺ and OH⁻ ions.

Therefore, the concentration of OH⁻ ions is equivalent to the concentration of the base.

Find pOH:

[tex]\displaystyle \begin{aligned} \text{pOH} & = -\log[\text{OH}^-] \\ \\ & = -\log(0.00043) \\ \\ & = 3.37 \end{aligned}[/tex]

Using the relationships between pH and pOH, hence determine pH:

[tex]\displaystyle \begin{aligned}\text{pH} + \text{pOH} & = \text{p}K_w = 14.00 \\ \\ \text{pH} & = 14.00 - 3.37 \\ \\ & = 10.63\end{aligned}[/tex]

In conclusion, the pH of the solution is about 10.63.

Answer:

0.14376 moles O₂

Explanation:

To find the amount of moles lost, (1) convert the grams O₂ before to moles (via molar mass from periodic table), then (2) convert the grams O₂ after to moles, then (3) subtract the moles O₂ after from the moles O₂ before.

Molar Mass (O₂) = 2(15.999) g/mol

Molar Mass (O₂) = 31.998 g/mol

Before Experiment:

1,027.8 grams O₂             1 mole O₂
--------------------------  x  ----------------------  = 32.121 moles O₂
                                      31.998 grams

After Experiment:

1,023.2 grams O₂           1 mole O₂
--------------------------  x  ----------------------  = 31.977 moles O₂
                                     31.998 grams

Moles Before - Moles After = Moles Lost

32.121 moles - 31.977 moles = 0.14376 moles O₂

The number of significant figures is determined by the significant figures of the values given. Both of the given values (1,027.8 and 1,023.2) have 5 sig figs. Therefore, the answer should also have 5 sig figs.

Answer:

The awnser is cloudy suspension.

As the  microscopic droplets of one liquid  are suspended in the other, it is a heterogeneous mixtures.

Heterogenous mixtures is defined as a type of mixture where in the composition is not uniform throughout the mixture.It consists as two or more phases. The phases are chemically distinct from each other.

As there are two or more phases present in heterogenous mixtures they can be separated by solvent extraction where in one phase is miscible with the solvent and the other phase is immiscible.

Components of a heterogenous mixtures are distinctly visible . There are two types of heterogenous mixtures, the colloids and the suspensions.These two vary with each other with respect to particle size.These are the mixture which are easy to separate out.

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Answer:

The law of constant proportion states that the percentage of each compound will stay constant regardless of the source size.

In other words, since 11.19% + 88.81% = 100%, in a 100 gram sample, these percentages will stay the same. In this case, 100% is "equal" to 100 grams.

So, 11.19 grams hydrogen and 88.81 grams oxygen will be present in a 100 gram sample of pure water.

Answer:

The motion of the molecules remains the same.

We have the equation [tex]2\text{H}_{2}+\text{O}_{2} \longrightarrow 2\text{H}_{2}\text{O}[/tex].

This means that for every mole of oxygen consumed, 2 moles of hydrogen are consumed.

Therefore, hydrogen is the limiting reactant.

If all 4 moles of the hydrogen are consumed, then 2 moles of the oxygen will be consumed. This means 1 mole of oxygen, which has a mass of 15.9994 grams, will remain.

The name of the compound CH₃CHOOH is acetic acid.

The International Union of Pure and Applied Chemistry (IUPAC) names organic compounds according to chemistry rules.

To locate the longest carbon chain, there are various requirements to follow, such as finding the functional group.

Thus, the name of the compound CH₃CHOOH is acetic acid.

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Answer:

alumimum

Explanation:

Aluminum oxidation happens faster than that of steel, because aluminum has a really strong affinity for oxygen. Rather than flaking though, aluminum oxide just forms a hard, whitish-colored surface skin. When all the aluminum atoms have bonded with oxygen the oxidation process stops.

hope this answers your question.

Answer:

254.32

Explanation:

The formula to calculate mass is:

no. of moles ×molar mass. and the molar mass of carbon dioxide is 44

Surveys are the data collection tool and research methods. The questionnaire survey tool is used to collect the data based on questions.

Questionnaires are the tool used for the research and the data collection for the analysis, investigation, and conclusion. It is one of the data collection tools that comprises questions and prompts.

Questionnaires are the part of surveys that gathers information on the topic of the research and is easy to analyze and cost-effective. It is a valuable tool that collects data from a large number of participants.

Therefore, the correct blank is the questionnaire.

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Answer:

a

Explanation:

Based on the law of conservation of mass, there is no loss in mass in the reaction, however carbon dioxide gas is evolved.

The law of conservation of mass states that for a chemical change occurring, the sum of masses before and after the reaction is constant.

Based on the law of conservation of mass, the reaction between 10.04g of calcium carbonate and 20cm3 of 1m hydrochloric acid will have the same mass before and after the reaction. Any change in mass will be due to evolution of carbon dioxide gas.

Therefore, there is no loss in mass in the reaction, however carbon dioxide gas is evolved.

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Answer:

A. bent

Explanation:

Identify the balanced chemical equation that represents a decomposition reaction.

2Fe(OH) 3 ⟶ 2FeO 3 + H 2O

CuSO 4 ⟶ CuO + 2SO 3

P 4 + 3O 2 ⟶ P 2O 3

Explanation:

Answer:

Option C

Explanation:

A decomposition reaction is a type of reaction in which one reactant breaks down in to two or more products.

Here in option C

On both reactant and products side

Hence balanced

The required pressure of the gas is 546 mmHg.

Relation between the volume and pressure of gas is explained through the ideal gas equation PV = nRT, and for the question required equation is:

P₁V₁ = P₂V₂, where

P₁ & V₁ are the initial pressure and volume.

P₂ & V₂ are the final pressure and volume.

On putting values from the question to the equation, we get

P₂ = (780)(350) / (500) =

P₂ = 546 mmHg

Hence required pressure is 546 mmHg.

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Answer:

The molar mass of O is 16 g/mol and since we have 2 oxygen molecules we multiply 16 g/mol to get 32 g/mol.  Therefore our best option would be option C, 32 g/mol.

Pauli Exclusion Principle is about quantum numbers of an atom. Hund rule is about how electrons are filled to the orbitals of an atom.