How to do Lewis structure for Al?

Answer:

C. Strong electrolytes can be expected to 100% dissociate in aqueous solution

Explanation:

The explanation is in the picture

For 3.50 grams of an unknown metal was placed in a graduate cylinder containing 50.0mL water initially,  the density of this unknown meta  is mathematically given as

D= 0.23 g/ml

Generally, the equation for the Volume of water  is mathematically given as

Vw= Volume of water after metal addition - Volume of water initial

Therefore

Vw = 65 ml - 50 ml

Vw= 15 ml

In conclusion,

D= Mass of metal / Volume

D= 3.5 / 15

D= 0.23 g/ml

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At STP

No of moles=2.5mol

Total volume:-

Answer:

An alloy is a mixture of two or more metals which is produced with a specific proportion between metals. So, if the proportion is changed the physical characteristic would be changed as well. For example, brass musical instruments are made of brass which is a mixture (an alloy) of zinc and copper in a specific proportion. If you change a proportion, you will change the physical characteristic of brass musical instruments, and a sound they produce will be different.

Explanation:

Answer:

As we have already discussed, reactivity of alkali metals tends to increase as you go down the group. Therefore, sodium is less reactive with water than is potassium, likewise with the alkaline metals; calcium is more reactive than magnesium

Based on the calculations, the final pressure of this gas sample at 370°C is equal to 2.66 atm..

Given the following data:

Initial temperature = 180°C.

Final temperature = 370°C.

Initial pressure = 900 torr.

Conversion:

760 torr = 1 atm.

900 torr = 1.29 atm.

In order to calculate the final pressure of an ideal gas at constant volume, we would apply Gay Lussac's law.

Mathematically, Gay Lussac's law is given by this formula;

[tex]P\;\alpha \;T\\\\P=kT[/tex]

Where:

Substituting the given parameters into the formula, we have;

[tex]\frac{P_1}{T_1} =\frac{P_2}{T_2} \\\\\frac{1.29}{180} =\frac{P_2}{370} \\\\0.0072 =\frac{P_2}{370}\\\\P_2 = 0.0072 \times 370[/tex]

Final pressure = 2.66 atm.

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Answer: city w

Explanation:

cities w,y,z all use renewable energy (sun, water, wind) which offput any greenhouse emmissions,

city w uses coal which produces greenhouse gases when used (burnt).

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Answer:

Hot magma change climate continents drift block sunlight folded mountains form rock deposits

Explanation:

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In the double displacement reaction between BaCl₂ and Na₃PO₄, 52.4 g of BaCl₂ are required to produce 50.5 g of Ba₃(PO₄)₂.

Stoichiometry refers to the relationship between the quantities of reactants and products before, during, and following chemical reactions.

BaCl₂(aq) + Na₃PO₄(aq) → Ba₃(PO₄)₂(s) + NaCl(aq)

We will use the trial and error method. We will:

3 BaCl₂(aq) + 2 Na₃PO₄(aq) → Ba₃(PO₄)₂(s) + 6 NaCl(aq)

The mass ratio of BaCl₂ to Ba₃(PO₄)₂ is 624.69:601.93.

50.5 g Ba₃(PO₄)₂ × 624.69 g BaCl₂/601.93 g Ba₃(PO₄)₂ = 52.4 g BaCl₂

In the double displacement reaction between BaCl₂ and Na₃PO₄, 52.4 g of BaCl₂ are required to produce 50.5 g of Ba₃(PO₄)₂.

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Answer:

A.

Explanation:

Answer:

liquid is heated. As the liquid is heated, the molecules within it gain the energy to escape the liquid phase and transition into the gas phase in the form of bubbles.

Explanation:

The process of photosynthesis and cellular respiration is usually at the barest minimum when drought occurs.

This is the process in which green plants manufacture their food through the presence of light energy from the Sun.

During drought, there is no water which reduces photosynthetic activity of plants. This leads to shortage of food thereby making bears to come into town in search of food.

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The chemical equation is

[tex]\rm Ca(NO_ 3)_2 (aq) + 2KCl (aq) \rightarrow CaCl_2 + 2KNO_3[/tex]

Chemical equation is defined as a symbolic representation of a chemical reaction in the form of symbols, in which the reactants and products are expressed in terms of their respective chemical formulas. It can also be called as chemical reactions.

There are basically six types of chemical reactions.

Thus, the chemical equation is

[tex]\rm Ca(NO_ 3)_2 (aq) + 2KCl (aq) \rightarrow CaCl_2 + 2KNO_3[/tex]

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Sinve CH3NH2 is weak base and its salt is CH3NH3Cl, mixing 125.0 mL of CH3NH2 and 120.0 mL of CH3NH3Cl so produce a buffer.

A buffer is a solution which resists changes to its pH when a small quantity of strong acid or base is added to it..

A buffer is made from a weak acid and its salt or a weak base and its salt.

From the given options, CH3NH2 is weak base and its salt is CH3NH3Cl.

Therefore, mixing 125.0 mL of CH3NH2 and 120.0 mL of CH3NH3Cl so produce a buffer.

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Explanation:

limiting is NH3

NO:27/88g

H2O: 25/09g

The number of times phosphorous is greater in not visible in the data

The steps involved for calculating the times the change in phosphorus level are :

First step: Determine the difference between Phosphorus levels in 1965 and 1975

Second step: Determine the difference between Phosphorus levels in 2008 and 2014

Last step: Determine the quotient by dividing first step by second step

Hence can conclude that The number of times phosphorous is greater in not visible in the data.

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Attached below is the missing Image related to your question

Answer:

2.25 moles

Explanation:

thats correct answer

Thank you

Answer:

Single-replacement reaction

Explanation:

Single-replacement reactions, aka. single-displacement reactions, involve one element/ion in a compound being replaced by another element/ion. In this case, aluminum is replacing the iron in the compound.

If you need help visualizing, the equation looks like this:

Fe₂O₃ + Al³⁺ --> Al₂O₃ + Fe³⁺

With an Ag concentration of 0.020 M and a Pb2+ concentration of

0.0010 M, Only PbSO4(s) will precipitate,

Option C is correct

Generally, the equation for the Chemical Reaction  is mathematically given as

Ag2SO4--->2Ag++SO4^{-2}

Where

PbSO4--->Pb2+ +SO4^{-2}

Therefore

Ag2SO4=[0.02^2[0.001]]

Ag2SO4=4*10^{-7}

and

PbSO4=[0.001^2[0.001]]

PbSO4=4*10^{-6}

In conclusion,Since PbSO4>>PAg2SO4, Only PbSO4(s) will precipitate.

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Answer:

Their structure is related to their function.

Explanation:

Protein structure is related to their function. Therefore, the correct option is option D among all the given options.

Proteins are huge biomolecular and macromolecular structures made up of one or even more long amino acid residue chains. Proteins serve a wide range of roles inside animals, including catalyzing metabolic events, DNA replication, reacting to stimuli, provides support to organisms and cells including transporting chemicals.

Proteins differ largely in their amino acid sequence, which is determined by the genetic code from their genes and generally culminates with protein folding into such a particular 3D structure that dictates its function. Protein structure is related to their function.

Therefore, the correct option is option D.

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Answer:

Hydrocarbons are insoluble in water because they are non-polar compounds while water is a polar solvent. By principle, like dissolves like. Nonpolar solvents dissolve nonpolar solutes and polar solvents dissolve polar solutes.

Explanation:

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Hydrocarbons are insoluble in water because :-

1)Hydrocarbons are nonpolar whereas water is polar. (like dissolves like).

2) Hydrocarbons and water do not exhibit appropriate solvent-solute interactions. Hydrocarbons only form very weak dispersion forces whereas water produces strong polar hydrogen bonding interactions.

Explanation:

An ionization suppressor is an alkali metal capable of preventing ionization, which can be used in atomic spectroscopy to determine matter composition.

Ionization refers to the phenomena capable of converting neutral atoms/molecules to electrically charged atoms/ions.

Ionization is a process by which radiation (e.g., alpha, beta, gamma rays) can pass energy to inert matter.

Some examples of ionization suppressors include salts of alkali metals (for example, potassium), which can be used in atomic spectroscopy to determine matter composition.

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Answer:

Your answer would be:
0.98atm.

Explanation:

The pressure of a gas can be calculated by using the following expression:

PV = nRT

P = pressure

V = volume
-----------------------------------

n = number of moles

R = gas law constant

T = temperature

P × 5 = 0.2 × 0.0821 × 298

5P = 4.893

P = 4.893 ÷ 5 = 0.98atm

P = 0.98atm

In conclusion, the pressure of a 5.00 L flask at 25 degrees C. that contains 0.200 mol of Cl2 is 0.98atm.

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Answer:

Hello, senzawahl SORRY IF I SPELLED YOUR NAME INCORRECT
Prime here ready to solve your question :)


so your correct answer is 0.98atm.

Explanation:

Stay safe


-prime

The statement, that describes separation technique would most likely be used if a solvent were saved is "distillation separation."

Separation techniques are methods for separating two different states of matter, such as liquid and solid. Methods that employ variations in physical qualities to separate the components of a mixture, such as evaporation, distillation, filtration, and chromatography, can be used to physically separate the components of a mixture.

Simple distillation is a technique for removing a solvent from a solution. Water, for example, can be extracted from salt solution by simple distillation. If a solvent was saved, the separation procedure would most likely be used is distillation.

Hence the correct option is B.

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Answer:

The charge on the compound

Explanation:

The charge on the compound signifies that the compound is not in its neutral state.

Therefore, the oxidation state would be equal to the charge on the compound.

Answer:

The charge on the compound

Explanation:

The charge on the compound signifies that the compound is not in its neutral state.

Therefore, the oxidation state would be equal to the charge on the compound.

Answer: 4.7432 L

Explanation:

Use stoichiometry: .4235 mol CuCl2 (1 mol I2 / 2 mol CuCl2)(22.4 L / 1 mol I2) = 4.7432 L :)

Answer:

A. Combined magnetic field

Answer:

A.combined magnetic field

Explanation:

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