The model represents a

Answer:b

Explanation:

Answer: The  volume is 57.52 mL if the temperature if raised to 343K.

Explanation:

Given: \(V_{1}\) = 27 mL,       \(T_{1}\) = 161 K

\(V_{2}\) = ?,        \(T_{2}\) = 343 K

According to Charles law, at constant pressure the volume of an ideal gas is directly proportional to temperature.

Formula used is as follows.

\(\frac{V_{1}}{T_{1}} = \frac{V_{2}}{T_{2}}\\\frac{27 mL}{161 K} = \frac{V_{2}}{343 K}\\V_{2} = 57.52 mL\)

Thus, we can conclude that volume is 57.52 mL if the temperature if raised to 343K.

Answer: the answer is a

Explanation:

you should always keep lab coat on when in lab

Answer:

its  A. chemistry labs have a lot of things that can hurt you, even with just a few drops . its one of the most dangerous experiment types you do in science. even if your not doing an experiment  but your in the room you should have on protection in case of a spill or something.  it is always impotent  to have safety  gear on. even more so in chemistry

Answer:

If you know the formula to use you should have no trouble getting the answers.

molality = mols/kg solvent.

mols sucrose = g/molar mass

kg solvent = 0.275 kg.

Answer:

True

Explanation:

Vacuum packing is a method of packaging that removes air from the package  before sealing. ... On a more short-term basis, vacuum packing can also be used to store fresh foods, such as vegetables, meats, and liquids, because it inhibits bacterial growth. Vacuum packing greatly reduces the bulk of non-food items.

1.5 atm pressure will be required for neon at 30°C to have the same density as nitrogen at 20°C and 1.0 atm.

The relationship between a gas's pressure P, volume V, and temperature T in the range of low pressures and high temperatures, when the gas's molecules move virtually independently of one another, is known as the ideal gas law, also known as the perfect gas law.

T\(_N_e\)​ =30⁰C=(30+273)K=303K

T\(_N_2\)​​ =20⁰C=(20+273)K=293K

P\(_N_2\) ​ =1.0atm

Ideal gas constant - R=0.0821L⋅atm/ K⋅ mol

The molar mass of

Neon - M\(_N_e\)​​=20.18g/mol

Nitrogen - M\(_N_2\)​​ ​ =2⋅14.007g/mol=28.014g/mol

Determine the pressure P\(_N_e\)​  required for neon at 30⁰C to have the same density (d) as nitrogen at 20⁰C.

d = m/V

We know that

n = m/M

Using the ideal gas law, we get

PV = nRT

PV = m/M *RT

Since

PM/RT = m/V =d

d =  PM/RT

d= \(\frac{P_{N_2} M_{N_2}}{R T_{N_2}}\)

d = 1.0 atm * 28.014 g/mol/0.0821L atm/K mol 293K

d = 1.2 g//L

Since both gases have the same density, we can calculate the pressure of neon gas, using

\(d=\frac{P_{N e} M_{N e}}{R T_{N e}}\)

\(P_{N e}=\frac{d R T_{N e}}{M_{N e}}\)

\(P_{N e}\)=1.2g/L . 0.0821L . atm/K.mol.303 K/20.18 g/mol

\(P_{N e}\)=1.5 atm

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C₂H₆O is referred to the chemical formula corresponds to this structural formula and is denoted as option D.

This contains information about the chemical proportion of atoms present in a molecule.

In this scenario, there are two carbon atoms, six hydrogen atoms and one oxygen atom which can be written as C₂H₆O. This is therefore the most appropriate choice in this scenario.

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Answer: D.) C6H14

Explanation: i hope this helps (this is for another question you might have tho) :)

The Ancient Egyptians used simple sundials and divided days into smaller parts, and it has been suggested that as early as 1,500BC, they divided the interval between sunrise and sunset into 12 parts. ... Known as a clepsydra, it uses a flow of water to measure time.

After adjusting for formal charges in SOCl₂,  types of orbitals are predicted to lie around the sulfur atom by the valence bond theory is the 4sp³ hybrid orbital and one delocalized orbital.

In the SOCl₂ , the formal charges are given as :

The formal charge on the S = 6-8/2 - 2 = 0

The formal charge on the O = 6 - 4/2 - 4 = 0

The formal charge on the Cl = 7 - 2/2 -6 = 0

The lone pair on S = 1 pair

The lone pair of O = 2 pair

The lone pair of Cl = 3 pair
The number of hybrid orbital is 4sp³ hybrid and the hybridization is sp³ hybridization.

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It would require approximately 6 half-lives for the amount of a radioactive isotope to decrease to 3.13% of its original value.

To determine the number of half-lives required for a radioactive isotope to decrease to 3.13% of its original value, we can use the equation:

Final amount = Initial amount * (1/2\()^(number of half-lives)\)

We want the final amount to be 3.13% of the initial amount, which can be expressed as 0.0313 times the initial amount.

0.0313 = 1 * (1/2\()^(number of half-lives)\)

To solve for the number of half-lives, we can take the logarithm (base 1/2) of both sides:

log(0.0313) = log((1/2\()^(number of half-lives)\))

Using logarithmic properties, we can rewrite the equation as:

log(0.0313) = (number of half-lives) * log(1/2)

We can now solve for the number of half-lives:

number of half-lives = log(0.0313) / log(1/2)

Calculating this expression, we find:

number of half-lives ≈ 5.141

Since the number of half-lives must be a whole number, we round up to the nearest whole number.

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The given question is incomplete. The complete question is:

Which is true of Elements on a periodic table in the same group (family)?

A; Elements in the same family have similar chemical properties because they have the same number of electron shells.

B; Elements in the same family have similar chemical properties because they have the same number of valence electrons.

C; Elements in the same family have few similar properties as they have different numbers of electron shells.

D; Elements in the same family are always the same type of Elements and have the same number of protons.

Answer: B; Elements in the same family have similar chemical properties because they have the same number of valence electrons.

Explanation:

Elements are distributed in groups and periods in a periodic table.

Elements that belong to same groups will show similar chemical properties because they have same number of valence electrons. The chemical reactivity of elements is governed by the valence electrons present in the element.

Example: Flourine, chlorine and bromine are elements which belong to Group 17. They have 9, 17 and 35 electrons respectively and contain 7 valence electrons each and need one electron to complete their octet.

Answer:The answer to the question is the release of energy. The bonds that bind a molecules atom's act as a storage of energy. One way it is released is when those bonds are broken and it is released outward in every direction. This breakage results in smaller molecules and not the formation of a larger molecule.

Explanation:

Answer: 2400 km

Explanation: 1200 km/hr • 2 hr = 2400 km

Answer:

13598 J

Explanation:

Q = m × c × ∆T

Where;

Q = amount of energy (J)

m = mass (grams)

c = specific heat capacity

∆T = change in temperature

m = 65g, specific heat capacity of water = 4.184J/g°C, initial temperature= 100°C, final temperature = 150°C

Q = 65 × 4.184 × (150 - 100)

Q = 271.96 × 50

Q = 13598 J

Hence, 13598 J of energy is required to boil 65 grams of 100°C water and then heat the steam to 150°C.

Answer:

\({ \rm{2H {}^{ + } _{(aq)} + CO {}^{2 - } _{3(aq)} \: \: \: {}^{ { \huge{\dashrightarrow} }} _{ \huge{ \dashleftarrow}} }} \: \: { \rm{H _{2} CO _{3(aq)} }}\)

Answer:

c

Explanation:

its the only one with a downside to solar and wind.

The formula of this cobalt oxide is CoO₂, and the reduction equation is  CoO₂ => Co + 4e⁻.

Reduction is the chemical manner wherein a species profits electrons or loses oxygen. this is in particular used for extracting irons from ores. Ans: discount is located in our activity, and respiration is one instance. Reduction is a day-to-day discount as it refers to the day-to-day addition of electrons, which results in a reduction in the oxidation number daily.

calculation:-

mass of cobalt oxide CoO = 0.83

after reducing to cobalt metal, mass =  0.59g.

mass of oxygen = 0.24

The formula of this oxide = CoO₂

An equation for the reduction of this oxide.

CoO₂ => Co + 4e⁻

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The percentage yield of magnesium chloride is 84.16%.

To calculate the percentage yield of magnesium chloride, you would divide the amount of magnesium chloride produced by the theoretical amount that could have been produced and multiply by 100.

First, we will calculate the theoretical yield of magnesium chloride. The balanced equation for the reaction is:

Mg + 2HCl → H2 + MgCl2

So for every 1 mole of Mg, we get 1 mole of MgCl2

To convert mass to moles we use the molar mass of each substance:

Mg = 24.3 g/mol

MgCl2 = 95.2 g/mol

So 100g of Mg is equal to (100 / 24.3) = 4.1 moles of Mg

and the theoretical yield of MgCl2 is 4.1 moles * 95.2g/mol = 391.32 g.

Now we can calculate the percentage yield by dividing the actual yield (330 g) by the theoretical yield (391.32 g) and multiplying by 100:

(330 / 391.32) * 100 = 84.16%.

So the percentage yield of magnesium chloride is 84.16%.

This means that 84.16% of the theoretical yield of magnesium chloride was actually produced in the reaction.

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Answer:

which energy?........

Explanation:

..........................

........

....

Answer:

no.

Explanation:

An Erlenmeyer flask is preferred over a beaker for the collection of the organic layer during an extraction due to its tapered shape and narrower neck.

This design minimizes the risk of splashing and facilitates the use of a stopper or separatory funnel, allowing for better separation of the organic and aqueous layers.

During an extraction, organic compounds are often separated from an aqueous solution. An Erlenmeyer flask is a more suitable choice for collecting the organic layer for several reasons:

1. Tapered shape: The tapered shape of an Erlenmeyer flask reduces the risk of splashing and allows for more controlled pouring of the organic layer.

2. Narrow neck: The narrower neck of the Erlenmeyer flask helps prevent the loss of volatile organic compounds and minimizes exposure to air, reducing the chances of evaporation and contamination.

3. Use of stopper or separatory funnel: The Erlenmeyer flask can accommodate a stopper or be connected to a separatory funnel, allowing for easier separation of the organic and aqueous layers. This enables efficient transfer of the desired organic layer while leaving behind the aqueous layer.

Overall, the design features of an Erlenmeyer flask make it a preferred choice for collecting the organic layer during an extraction, ensuring better separation and minimizing loss or contamination of the organic compound.

B) In a simple distillation setup, the thermometer bulb should be positioned at the same height as the sidearm or slightly below it. This allows for an accurate boiling point reading by measuring the temperature of the vapor being produced.

In a simple distillation setup, the thermometer is used to monitor the boiling point of the liquid being distilled. To obtain an accurate boiling point reading, it is essential to position the thermometer bulb correctly.

The proper position of the thermometer bulb is at the same height as the sidearm of the distillation apparatus or slightly below it. This ensures that the thermometer is immersed in the vapor phase where the temperature corresponds to the boiling point of the liquid. Placing the bulb too high or too low in the apparatus can result in inaccurate temperature readings.

Here is a simple illustration to depict the positioning of the thermometer bulb in a distillation setup:

```

    <- Sidearm

   |

 __|__

|     |

|_____| <- Thermometer bulb

   |

   |

```

By positioning the thermometer bulb at the appropriate height, it will accurately measure the temperature of the vapor, providing a reliable indication of the boiling point of the liquid being distilled.

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there is how I would answer it.

Answer:

6

Explanation:

\(n_1\) = Final energy level = 2

\(R_H\) = Rydberg constant = \(10967758.3\ \text{m}^{-1}\)

\(\lambda\) = Wavelength = 410 nm

From the Rydberg formula we have

\(\dfrac{1}{\lambda}=R_H(\dfrac{1}{n_1^2}-\dfrac{1}{n_2^2})\\\Rightarrow n_2=(\dfrac{1}{n_1^2}-\dfrac{1}{\lambda R_H})^{-\dfrac{1}{2}}\\\Rightarrow n_2=(\dfrac{1}{2^2}-\dfrac{1}{410\times 10^{-9}\times 10967758.3})^{-\dfrac{1}{2}}\\\Rightarrow n_2=\pm6.01\approx 6\)

The initial energy level is 6.

Answer: The limiting reactant will be used up first, meaning the reaction can no longer occur with only the excess reactant.

Explanation:

In a reaction the reactant which determines the yield of the reaction is called limiting reactant. Whereas, the reactant which is excess in amount does not itself lead the reaction after the limiting reactant is consumed.

In a reaction, the yield of the product depends on the number of moles of reactants. The reactants which is not sufficient in amount is determining the yield because as soon as this reactant is consumed, the production stopes.

The excess reactant on the other hand is excess in amount which can't lead the reaction alone after the consumption of the limiting reactant. Hence, we don't have to worry on the excess reactant.

The limiting reactant of a reaction can be determined  by calculating the number of moles of each reactants participating in it.

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The complete reaction equation, using the lowest number of coefficients possible is;  HF(aq)  +  OH^-(aq)  ----> F^-(aq) + H2O(l)

The reaction equation here shows the reaction between hydrogen fluoride and the the hydroxide ion from a base. This is a neutralization reaction as shown.

The reaction can fully be represented as;

HF(aq)  +  OH^-(aq)  ----> F^-(aq) + H2O(l)

This is the full reaction equation using the lowest number of coefficients possible in the reaction equation.

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Answer:

The correct answer is = 31.04

Explanation:

The relation between volume, temperature and pressure of a fix amount of a gas can be expressed by the combined gas law:

PV/T = k

It can be written as well as

P1V1/T1 = P2V2/T2

Given:

V1 = 217.6

P1 = 9.011 atm

T1 = 127.8°C = 400.95 K

P2 = 44.9

T2 = 11.9 °C = 285.05

Solution:

Putting value in the formula

V2 = P1V1T2/P2T1

= (217.6*285.05*9.011)/44.9*400.95

V2 = 31.04

Answer:

Unlike the other planets of the solar system, Uranus is tilted so far that it essentially orbits the sun on its side, with the axis of its spin nearly pointing at the star. This unusual orientation might be due to a collision with a planet-size body, or several small bodies, soon after it was formed.

Explanation:

the axis is vertical

Answer:

The axis is pointing towards the sun!!!

Explanation:

it's an ionic bond

btw i love your profile picture never understand is one of my favorites