9. An unknown gas has a volume of 200L at 5 atm and -140°C. What is its volume at STP?


10. A Los Angeles class nuclear sub has an internal volume of eleven million liter at a


pressure of 1. 250 atm. If a crewman were to open one of the hatches to the outside


ocean while it was underwater (pressure of 15. 75 atm), what would be the new volume


of the air inside?


11. A man heats a balloon in the oven (Why?. Who knows?. It is a crazy world we live in).


If the balloon initially has a volume of 0. 40 L and a temperature of 20 °C, what is its


volume after he heats it to 250 °C?


Mixed Gas Laws


12. A gas has a pressure of 1. 26 atm and occupies a volume of 7. 40 L. If the gas is


compressed to a volume of 2. 93 L, what is its new pressure?


13. People who are angry sometimes say that they feel as if they'll explode. If a calm


person with a lung capacity of 3. 5 liters and a body temperature of 36 °C gets angry,


what is the volume of their lungs if their temperature rises to 39 °C. Do you think they


will really explode?

Answer:

frick u beotch

Explanation:

Answer: Atm

I took a test and got it right.

Answer:

does friction talks ? friction is a oppossing force tho

Answer:

this is the name for it PENTADECANOIC ACID

Explanation:

I kinda don't understand what you mean by the compound name but this is the scientific name, tell me if it helped :)

Answer: 64.20 g

Explanation:

The balanced chemical equation for the reaction between aluminum and iron(III) oxide is:

2Al + Fe2O3 → 2Fe + Al2O3

Using the molar masses of aluminum (Al) and iron(III) oxide (Fe2O3), we can calculate the number of moles of each reactant:

moles of Al = mass ÷ molar mass = 21.4 g ÷ 26.98 g/mol = 0.793 mol

moles of Fe2O3 = mass ÷ molar mass = 91.3 g ÷ 159.69 g/mol = 0.572 mol

According to the balanced equation, 2 moles of Al react with 1 mole of Fe2O3. Therefore, the stoichiometric ratio of Al to Fe2O3 is 2:1. However, we have more moles of Al than what is required for the reaction with the available amount of Fe2O3. Hence, Fe2O3 is the limiting reagent and Al is in excess.

To calculate the amount of excess Al, we can use the stoichiometric ratio of Al to Fe2O3 to determine the theoretical amount of Al required to react with all the available Fe2O3:

moles of Al needed = 0.5 × moles of Fe2O3 = 0.5 × 0.572 mol = 0.286 mol

The amount of excess Al is the difference between the actual amount of Al used and the theoretical amount needed:

moles of excess Al = moles of Al used - moles of Al needed

= 0.793 mol - 0.286 mol

= 0.507 mol

The mass of excess Al can be calculated using its molar mass:

mass of excess Al = moles of excess Al × molar mass of Al

= 0.507 mol × 26.98 g/mol

= 13.68 g

Therefore, the mass of excess Al left over is 13.68 g.

To determine the amount of iron produced, we can use the stoichiometric ratio of Fe2O3 to Fe in the balanced equation:

1 mole of Fe2O3 produces 2 moles of Fe

moles of Fe = 2 × moles of Fe2O3

= 2 × 0.572 mol

= 1.144 mol

The mass of iron produced can be calculated using its molar mass:

mass of Fe = moles of Fe × molar mass of Fe

= 1.144 mol × 55.85 g/mol

= 64.20 g

Therefore, the mass of iron produced is 64.20 g.

The estimated standard enthalpy of formation of potassium bromide (KBr) is -393.8 kJ/mol.

To estimate the standard enthalpy of formation (ΔHf°) of potassium bromide (KBr), we need to use the following thermochemical equation:

K(s) + 1/2 Br₂(g) → KBr(s)

We can use the standard enthalpies of formation of the reactants and products to calculate the ΔHf° of KBr:

ΔHf°(KBr) = ΣnΔHf°(products) - ΣnΔHf°(reactants)

Where n is the stoichiometric coefficient of each substance in the balanced equation.

From tables of standard enthalpies of formation, we can find:

ΔHf°(K) = 0 kJ/mol (because K is in its standard state)

ΔHf°(Br₂) = 0 kJ/mol (because Br₂ is in its standard state)

ΔHf°(KBr) = -393.8 kJ/mol

Substituting these values into the above equation, we get:

ΔHf°(KBr) = [1 × ΔHf°(KBr)] - [1 × ΔHf°(K) + 1/2 × ΔHf°(Br₂)]

ΔHf°(KBr) = [-393.8 kJ/mol] - [0 kJ/mol + 0 kJ/mol]

ΔHf°(KBr) = -393.8 kJ/mol

Therefore, the estimated standard enthalpy of formation of potassium bromide (KBr) is -393.8 kJ/mol.

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Answer:

YEESSS

Explanation:

Because that seems like the only logical answer.

Answer:

YES

Explanation:

YES

The given structure is of formaldehyde an organic compound and it is acidic in nature.

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Chemical substances known as oxygenates have oxygen as one of their constituent parts. Tech B is correct

Although technically any substance containing oxygen qualifies as an oxygenate, the term is most frequently used to refer to substances added to internal combustion engine vehicles.

Oxygenate fuel additives are either alcohols, like ethanol, or ethers, with methyl tertiary butyl ether, or MTBE, being the most often used. Any chemical compound that has at least one hydroxyl group, which is made up of oxygen and hydrogen and is connected to the carbon atom in an alkyl group, is referred to as alcohol. Alkyl groups are made up of hydrogen and carbon atom chains.

Alcohols are a crucial group in organic chemistry despite their lack of chemical specificity because of how many different compounds they can originate from and be transformed into.

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Answer: Ik its too late but the answer is yeast.

Explanation: Sugar is yeasts food. If you mix sugar with yeast, and put it in something such as bread, a bottle with a balloon over it, or etc. It will cause it to rise.

Answer:

This is just a quick tip.

Explanation:

An electric current is the movement of particles, starting at the moment when an external voltage is applied at one of the ends of the conductor. That, in turn, generates an electric field on the negatively charged electrons that are attracted to the positive terminal of the external voltage.

Answer:

im not completely sure what you're asking here, but if the question is "are the way elements arranged important to daily life" the answer is yes. elements make up everything. for example, we couldn't survive without water, which is H2O.

Explanation:

Answer:

The pH scale measures acidity of a substance. known as potential of hydrogen, it varies from 0 to 14 with 7 being the pH value of a neutral solution. Below 7 shows the substance is acidic in nature and above 7 is alkaline in nature. pH 0-3 are considered strong acids while pH 4-6 are weak acids. pH 8-10 are weak alkalines and pH 11-14 are strong alkalines. This is a general trend and there may be exeptions especially if the substance has a negative pH. However, it would not be covered likely unless you are doing university chemistry.

The given question is incomplete. The complete question is:

Calculate the number of moles and the mass of the solute in each of the following solution: 100.0 mL of 3.8 × 10−5 M NaCN, the minimum lethal concentration of sodium cyanide in blood serum

Answer: The number of moles and the mass of the solute are \(0.38\times 10^{-5}\) and \(18.62\times 10^{-5}g\) respectively

Explanation:

Molarity of a solution is defined as the number of moles of solute dissolved per liter of the solution.

\(Molarity=\frac{n\times 1000}{V_s}\)

where,

n = moles of solute

\(V_s\) = volume of solution in ml

\(3.8\times 10^{-5}M=\frac{n\times 1000}{100.0}\)

\(n=0.38\times 10^{-5}\)

n = moles of \(NaCN\) = \(\frac{\text {given mass}}{\text {Molar mass}}\)

\(0.38\times 10^{-5}=\frac{x}{49g/mol}\)

\(x=18.62\times 10^{-5}g\)

Thus the number of moles and the mass of the solute are \(0.38\times 10^{-5}\) and \(18.62\times 10^{-5}g\) respectively

Answer:

158.4 g

Explanation:

Find mass of CO2

= Number of moles x molar mass

= 3.6 mol x (12 + 16 + 16)

= 3.6 mol x 44

= 158.4 g

Answer:

jzjsjsjsjjsjsjsjsjsjsjjsjsjdjdj

Answer: I don't know how to add a picture, so I might not explain this well.

Explanation: You put Na in the first box. Then you put F in the center of the second box because it gained one electron from Na. Then in the third box you put Na [+] because it lost one electron so it's now an cation(has a positive charge) because it lost a valence electron. In the last box you would put F [-] because it gained one electron so it's now an anion( has a negative charge) because it gained a valence electron. F now has 8 valence electrons and Na has 8 as well therefore they're both balanced.

The final method of sodium fluoride is NaF. An ionic compound is formed with the aid of the complete transfer of electrons from a steel to a nonmetal and the ensuing ions have achieved an octet.

The chemical formula of sodium fluoride is NaF and its molar mass is 41.99 g/mol. it's miles an easy ionic compound, made from the sodium (Na+) cation and fluoride (F-) anion. The strong salt exists as cubic crystals just like the crystal structure of sodium chloride (NaCl).

Sodium fluoride is synthetic via the response of hydrofluoric acid with sodium carbonate or sodium hydroxide with the formula NaF. The most inexpensive chemical to be had for fluoridation is sodium fluorosilicate, formerly referred to as sodium silicofluoride.

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Answer:

I dont understand what is the question you need help on-

Explanation:

Answer:

384.9 mL.

Explanation:

What is given?

Volume 1 (V1) = 823.7 mL.

Pressure 1 (P1) = 351.8 torr.

Pressure 2 (P2) = 752.9 torr.

What do we need? Volume 2 (V2).

Step-by-step solution:

This is a Boyle's Law problem. Boyle's law states that the volume of a given mass of gas varies inversely with the pressure when the temperature is kept constant. An inverse relationship is described in this way. As one variable increases in value, the other variable decreases.

The formula of the law is:

Where P is pressure and V is volume. We want to find volume 2, 'V2'. So let's solve for 'V2' and replace the given data that we have in the new formula:

The new volumewill be 3384.9 mL You can note as the pressure is increasing, the volume is decreasing.

Answer:

-50

Explanation:

23.67-75=24-75 (to2sf)

              =-51

              =-50 ( to 2sf)

Answer:

Yes

Explanation:

By definition, the equilibrium constanct, Kc, for the reaction A ⇒ 2B is

= [A]^1 / [B]^2

Substitute [A] = 4 and [B] = 2 in the equation,

[A]^1 / [B]^2

= 4^1 / 2^2

= 1

= Kc

So yes the reaction is at equilibrium.

Let's find K_c

\(\\ \rm\Rrightarrow K_c=\dfrac{[B^]^2}{[A]^1}\)

\(\\ \rm\Rrightarrow 1=\dfrac{2^2}{4}\)

\(\\ \rm\Rrightarrow 1=\dfrac{4}{4}\)

\(\\ \rm\Rrightarrow 1=1\)

Yes it's at equilibrium

The molecular formula of the compound that contains only carbon and hydrogen, with 85.6% carbon and has a molar mass of 70 g/mol is C₅H₁₀

C = 85.6%

H = 100 – 85.6 = 14.4%

Divide by their molar mass

C = 85.6 / 12 = 7.13

H = 14.4 / 1 = 14.4

Divide by the smallest

C = 7.13 / 7.13 = 1

H = 14.4 / 7.13 = 2

Thus, the empirical formula of the compound is CH₂

Empirical formula => CH₂

Molar mass of compound = 70 g/mol

Molecular formula = Empirical × n = molar mass

[CH₂]n = 70

[12 + (1×2)]n = 70

[12 + 2]n = 70

14n = 70

Divide both side by 14

n = 70 / 14

Molecular formula = [CH₂]ₙ

Molecular formula = [CH₂]₅

Therefore, the molecular formula of the compound is C₅H₁₀

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Answer:

The number of protons is 30. Substitute the known values, where N represents the number of neutrons. Let's rewrite the equation as 30+N=65 30 + N = 65 .

Answer:

35 neutrons

Step by step explanation:

Atomic mass of Zinc: 65 amu (atomic mass units)

Number of protons in Zinc: 30

Number of neutrons in Zinc: Atomic mass of Zinc - Number of protons in Zinc = 65-30 = 35 neutrons.

Therefore, zinc atoms have 35 neutrons.

Hope this helps!!!

Please mark me as brainliest!!!

Explanation:

so for this one u need to remember this equation and use it to find out moles= mass /mr . Mr of helium is 4

so moles= mass /mr

=100/4

=25 moles

hope this make sense:)

Answer:

1. The chemical formula is determined by first finding the positive charge, which is cation, and then finding the negative charge, which is the anion. The cation is writing first, than the anion.

2.An ionic compound is named first by its cation and then by its anion.

Explanation:

Just did it.

Answer:

increase environmental problems

The material with a higher boiling point is:  CaCl2,CH3Br,CH3OH

Because ionic forces are more powerful than covalent interactions, these compounds have higher boiling temperatures than expected.

Relative boiling points can be predicted using intermolecular forces (IMFs).The relationship between the substance's vapour pressure and boiling point depends on the strength of the IMFs.In order to anticipate the compounds' respective boiling points, we may compare the IMFs of the various compounds.

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Proper personal protective equipment, handling of the separating funnel, and releasing pressure inside the separating funnel at regular intervals are some common precautions while performing extraction using a separating funnel.

Let's look into them point-wise:

When performing the extraction using a separatory funnel, the following precautions must be taken:

1. Wear appropriate personal protective equipment (PPE) such as gloves, goggles, and a lab coat to protect yourself from potential chemical spills or splashes.
2. Ensure that the stopcock of the separatory funnel is closed before adding any liquids to prevent accidental spills.
3. Add liquids slowly and carefully to avoid overfilling the separatory funnel.
4. Make sure to use a suitable solvent for the extraction, as some solvents may not be compatible with the material of the separatory funnel or the substances being extracted.
5. When mixing the two phases, ensure the funnel cap is securely in place to prevent spills and invert the funnel gently to avoid violent reactions.
6. Release the pressure that may build up in the funnel by occasionally opening the stopcock. In contrast, the funnel is inverted and points the opening away from your face and other people's.
7. Allow the layers to separate completely before collecting the desired layer.
8. Be cautious when draining the liquid from the funnel and collect the correct layer in an appropriate container.
9. Properly clean and store the separatory funnel after use, ensuring the stopcock is open to prevent damage due to pressure buildup.

By following these precautions, you can perform an extraction using a separatory funnel safely and effectively.

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