Determine the formula of the hydrated salt with iron 20. 14%, oxygen 23. 02%,sulphur11. 51%,water 45. 32% and molecular mass ofsalt is278

Q = 203,250 kJ heat is required to vaporize.

The amount of heat required to vaporize a substance is known as its heat of vaporization. To calculate the heat of vaporization in kJ, you will need to know the substance's specific heat of vaporization (ΔHvap), which is the amount of heat required to vaporize one mole of the substance at its boiling point. You can also use the following equation: Q = mLΔHvap , Where Q is the heat energy in kJ, m is the mass of the substance in grams and L is the substance's heat of vaporization .Missing text find on internet: a 90,0 mL sample of water is heated to its boiling point. V(H₂O) = 90,0 mL. d(H₂O) = 1,00 g/mL. m(H₂O) = 90 mL · 1,00 g/mL. m(H₂O) = 90 g. n(H₂O) = m(H₂O) ÷ M(H₂O). n(H₂O) = 90 g ÷ 18 g/mol. n(H₂O) = 5 mol. Q = n(H₂O) · ΔHvap Q = 5 mol · 40.65 kJ/mol. Q = 203,250 kJ. Q - heat reqiured.

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The statement "The body of a polar bear is able to withstand extreme cold. Temperature of 50 degrees Fahrenheit can be too warm for them" is true as polar bears have adaptations that enable them to survive in the harsh, cold environment of the Arctic.

A polar bear (Ursus maritimus) is a species of bear that is native to the Arctic region and is one of the largest land predators. They are characterized by their thick, white fur which provides insulation from the cold, and their large size, which helps them to hunt effectively on the ice. Polar bears feed mainly on seals, and their population is found in the Arctic Circle, which includes countries like Canada, Greenland, Norway, and Russia.

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The Complete the steps for converting the density of mercury is

13.6 g x  1 Kg    x   10⁶ cm³ = 13600Kg

 cm³     1000g            m³

the method of changing 13.6 g/cm3 to kg/m3

A kilogram is equal to one thousand grams.

Consequently, it may be written as

1 Kg = 1000g

1g =  1kg  

      1000

Therefore, 1 kg will be entered into the first blank (numerator).

Currently, 100 centimeters make up 1 meter.

Thus,

1 m³ = (100)³ cm³

1cm³ = 1m³

          10⁶

so  the second blank (numerator). will be filled with 10⁶

Additionally, the third blank will be filled with 1 m³

And 13600 will be the final blank.

The final equation will look like this:

13.6 g x  1 Kg    x   10⁶ cm³ = 13600Kg

 cm³     1000g            m³

Your question is incomplete but most probably your full question attached below

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Answer:

CIO- or HCIO. ^_________^

Answer:

The answer is C2H4O2

Ethyl methanesulfonate (EMS) is typically known to induce point mutations and transition mutations.

Point mutations are mutations that affect a single nucleotide in the DNA sequence. They can result in the substitution of one nucleotide for another, leading to changes in the encoded amino acid and potentially affecting the function of the encoded protein.

Transition mutations are a type of point mutation where a purine (adenine or guanine) is replaced by another purine or a pyrimidine (cytosine or thymine) is replaced by another pyrimidine. This results in changes within the DNA sequence that can affect the coding of the protein.

EMS is a chemical mutagen that acts by alkylating the DNA molecule and introducing changes in the DNA sequence. The types of mutations induced by EMS are predominantly transition mutations, which are due to the ability of EMS to alter the purine bases (adenine and guanine) in DNA.

Therefore, EMS is typically known to induce point mutations and transition mutations, but not missense mutations.

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Answer:

Explanation:

The mass of an atom is dependent on its number of protons and neutrons. Electrons have mass, but are too light in comparison to protons and neutrons to contribute towards the overall mass. Their relative mass is about 1/1840 compared to 1 for protons and neutrons, and therefore are not counted in the mass.

Hope this helped!

Answer:

D

Explanation:

Consuming approximately 249 cans of soda from the given brand, assuming each can contains 12 oz and a caffeine concentration of 3.35 mg/oz, would reach a lethal dose of 10.0 grams of caffeine.

To determine how many cans of soda would be lethal based on the given information, we need to calculate the total amount of caffeine consumed from drinking multiple cans and compare it to the lethal dose.

Given:

- Caffeine concentration in the soda: 3.35 mg/oz

- Lethal dose of caffeine: 10.0 grams

- Volume of one can of soda: 12 oz

First, we need to calculate the total amount of caffeine in one can of soda:

Caffeine per can = Caffeine concentration x Volume of one can

Caffeine per can = 3.35 mg/oz x 12 oz

Caffeine per can = 40.2 mg

Next, we need to determine how many cans of soda would contain a lethal dose of caffeine:

Lethal dose of caffeine = Total cans x Caffeine per can

10.0 grams = Total cans x 40.2 mg

Solving for Total cans:

Total cans = 10.0 grams / 40.2 mg

Converting grams to milligrams:

Total cans = 10,000 mg / 40.2 mg

Total cans ≈ 249.38 cans

Based on the calculations, consuming approximately 249 cans of soda from the given brand, assuming each can contains 12 oz and a caffeine concentration of 3.35 mg/oz, would reach a lethal dose of 10.0 grams of caffeine.

It is important to note that this calculation is based solely on the caffeine content and does not take into account other factors such as individual tolerance, metabolism, and potential health risks associated with high caffeine consumption. Lethal doses of substances vary among individuals, and consuming such a high quantity of caffeine can have severe health consequences. It is always recommended to consume caffeine and any other substances within safe and recommended limits.

NOTE: The complete question is-

If the caffeine concentration in a particular brand of soda is 3.35 mg/oz, drinking how many cans of soda would be lethal? Assume 10.0 grams of caffeine is a lethal dose, and there are 12 oz in a can.

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There are 37 grams of hydrogen present in the 100 g sample given that compound is composed of 37% hydrogen and 63% oxygen.

MASS OF AN ELEMENT:

According to this question, a compound is said to be composed of 37% hydrogen and 63% oxygen.

This means that in 100g of the compound, its elemental constituents are as follows:

This means that hydrogen will contain 37g in 100g of the given compound.

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There are four. Fe, H, C, and O

Answer: Microscope

Robert Hooke's Microscope. Robert Hook refined the design of the compound microscope around 1665 and published a book titled Micrographia which illustrated his findings using the instrument.

Explanation:

Answer:

Hey i actually know this! haha only cause i did it.

its a Microscope.

and im pretty sure hooke was the first to discover!

Explanation:

brainliest?

Answer:

sorry xouldnt answer all

Explanation:

thier is ¹² equations ln tour answer

Answer:

4.5 L

Explanation:

From Charles law;

V1/T1 = V2/T2

Where;

V1= initial volume = 2.5 L

T1 = initial temperature = -23°C + 273 = 250 K

V2 = final volume = unknown

T2 = 177°C +273 = 450 K

Making V2 the subject of the formula

V2 = V1 T2/T1

V2 = 2.5 × 450/250

V2 = 4.5 L

Answer:300k=3L

             700k=x

cross multiply

300x=2100; x=7L

Explanation:

Answer:

7L

Explanation:

Answer:

3.82 g.

Explanation:

To calculate the mass of sulfuric acid produced from 1.25 g of sulfur, we'll have to balance the chemical equations and use stoichiometry.

Starting with the first reaction:

2S(s) + 3O2(g) → 2SO3(g)

Since 1.25 g of sulfur is reacted, the number of moles of sulfur can be calculated as:

moles = mass / molar mass = 1.25 g / 32 g/mol = 0.03906 mol

Next, using the mole ratio from the balanced chemical equation, we can find the number of moles of sulfur trioxide produced:

2 moles of sulfur produce 2 moles of sulfur trioxide, so:

moles of SO3 = moles of S x (moles of SO3 / moles of S) = 0.03906 mol x (2 mol / 2 mol) = 0.03906 mol

Finally, we move on to the second reaction, the dissolution of sulfur trioxide in water:

SO3(g) + H2O(l) → H2SO4(l)

Using the mole ratio from this balanced equation, we can find the number of moles of sulfuric acid produced:

1 mole of sulfur trioxide reacts with 1 mole of water to produce 1 mole of sulfuric acid, so:

moles of H2SO4 = moles of SO3 x (moles of H2SO4 / moles of SO3) = 0.03906 mol x (1 mol / 1 mol) = 0.03906 mol

The mass of sulfuric acid produced can be calculated using the moles and the molar mass of sulfuric acid:

mass = moles x molar mass = 0.03906 mol x 98 g/mol = 3.82 g

Therefore, if 1.25 g of sulfur is reacted, the mass of sulfuric acid produced is approximately 3.82 g.

Perfect gas particles move in straight lines and have no size, among other characteristics. The right answer is D) a gas made up of tiny, nonpolar molecules.

The gas particle's volume is quite small. There are no intermolecular forces between the gas particles, which are all the same size. Newton's Laws of Motion are consistent with the random motion of the gas particles. Perfect elastic collisions occur between gas particle without any energy being lost.

The particles of a real gas have limited volumes and are attracted to one another, whereas the particles of an ideal gas are considered to have no volume and no interparticle attraction.

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Acetic acid is the by product of production of aspirin. Aspirin crystals are formed after the acetic acid is removed through filtration of the acetic acid-water solution. Recrystallization from an ethanol/water solvent pair removes any trace levels of salicylic that are still present.

Acetylsalicylic acid (ASA), generally known as aspirin, is a nonsteroidal anti-inflammatory medication (NSAID) used to treat inflammation, fever, and/or pain as well as a blood thinner. Aspirin is used to treat a variety of inflammatory disorders, including Kawasaki disease, pericarditis, and rheumatic fever. 

Long-term usage of aspirin is also used to help those at high risk avoid further heart attacks, ischemic strokes, and blood clots.

The effects of pain or fever usually start to take effect after 30 minutes. While aspirin functions similarly to other NSAIDs, it also inhibits platelets' natural function.

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Answer:

A measurement may be reported as 18.0 mL instead of 18 mL to indicate that it has been measured with greater precision.

The decimal point in 18.0 mL indicates that the measurement was taken to the tenths place, meaning that the actual measurement is between 17.5 mL and 18.4 mL. On the other hand, 18 mL implies that the measurement is between 17.5 mL and 18.9 mL.

Therefore, the use of the decimal point in this case is a way to indicate that the measurement has a higher degree of precision. It is used as a way to communicate that the measurement was taken with greater accuracy and that the number has been rounded to the nearest tenth.

A measurement may be reported as 18.0 mL instead of 18 mL to indicate that it is an exact or precise measurement, rather than an approximation. In scientific experiments or laboratory work, measurements are often reported with a certain number of significant figures, which reflect the precision of the measurement.

In this case, 18.0 mL has one decimal point and implies that the measurement was made to the nearest 0.1 mL, whereas 18 mL doesn't have a decimal point and implies that the measurement was made to the nearest mL.

Additionally, in some cases, the trailing zero after a decimal point is used to indicate the accuracy of the measurement and to make it clear that it is not a rounded number.

Option (d), P=ATC=MR=MC, accurately represents the long-run equilibrium condition for perfect competition, reflecting the balance between price and cost for firms operating in a competitive market.

The long-run equilibrium condition for perfect competition is that price (P) is equal to average total cost (ATC), which is also equal to marginal cost (MC), and marginal revenue (MR).

Option (d), P=ATC=MR=MC, best represents the long-run equilibrium condition for perfect competition. In perfect competition, firms operate at the minimum point of their average total cost curve, where price equals both average total cost and marginal cost. This condition ensures that firms are earning zero economic profit and are producing at an efficient level.

In the long run, if firms are earning economic profit, new firms will enter the market, increasing competition and driving prices down. Conversely, if firms are experiencing losses, some firms may exit the market, reducing competition and causing prices to rise. This process continues until firms reach a state where price equals average total cost, marginal cost, and marginal revenue, ensuring a long-run equilibrium.

Therefore, option (d), P=ATC=MR=MC, accurately represents the long-run equilibrium condition for perfect competition, reflecting the balance between price and cost for firms operating in a competitive market.

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The maximum number of electrons that can occupy the n=4 quantum shell is 32. This is based on the formula 2n^2, which gives the maximum number of electrons that can occupy any given quantum shell. Therefore, for the n=4 shell, the maximum number of electrons that can occupy it is 2(4^2), or 32.

In quantum mechanics, electrons are arranged in shells around the nucleus of an atom. The shells are designated by the principal quantum number (n), with n=1 representing the innermost shell.

The maximum number of electrons that can occupy any given shell is given by the formula 2n^2.

For the n=4 quantum shell, the maximum number of electrons that can occupy it is 2(4^2), or 32. This means that the first three shells (n=1, 2, and 3) can hold a maximum of 2, 8, and 18 electrons, respectively, while the n=4 shell can hold a maximum of 32 electrons.

The number of electrons that actually occupy the n=4 shell in an atom depends on the specific atom and its electron configuration.

For example, the electron configuration of potassium (K) is [Ar] 4s1, which means it has one electron in the n=4 shell. On the other hand, the electron configuration of germanium (Ge) is [Ar] 3d10 4s2 4p2, which means it has a total of 18 electrons in the n=4 shell (10 in the d subshell, 2 in the s subshell, and 6 in the p subshell)

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Answer:

blurred an pic mo paki ayos

The correct reagent to use in Step 2 of the given reaction is SOCl₂. This is because the desired product, 5-cyclopentylpentanoyl chloride, can be synthesized through the reaction of 5-cyclopentylpentanoic acid with SOCl₂.

The reaction involves the replacement of the -OH group on the carboxylic acid with a -Cl group from the SOCl₂, resulting in the formation of the desired product.

Other reagents listed may not be suitable for this specific reaction.

PCC (CH₃CH₂CH₂)₂ is typically used for oxidizing primary alcohols to aldehydes or secondary alcohols to ketones.

CuLi is used in Grignard reactions to synthesize carbon-carbon bonds. Jones reagent is used to oxidize primary and secondary alcohols to carboxylic acids.

MgBr is used to form Grignard reagents which can be used for various reactions. However, none of these reagents will produce the desired product of 5-cyclopentylpentanoyl chloride in Step 2.

In summary, the appropriate reagent for Step 2 in the given reaction is SOCl₂ as it facilitates the conversion of 5-cyclopentylpentanoic acid to 5-cyclopentylpentanoyl chloride, which is the desired product.

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The percent error in the measurement of vitamin C amount by the student is 31.6%.

% error = (95 - 65)/95 × 100

% error = 30/95 × 100

% error = 31.6%.

Therefore, the percent error in the measurement of vitamin C amount by the student is 31.6%.

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The sequence that represents the relationship between temperature and volume as explained by the kinetic-molecular theory is higher temperature/ more kinetic energy/ more space between particles/ higher volume

The kinetic theory of matter can be described as the theory that  stressed that all matter is made of small particles  and thses particules are seen to be in random motion  with some space between them.

It should be noted that the theory help us to know about matters in their differnt forms such as liquid, solid and gas and the relationshipto temperture and parameters.

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Answer:

A.

Explanation:

The difference in degrees Fahrenheit between the maximum expected temperatures by the end of the century between the lower and higher emissions scenarios can vary depending on various factors and assumptions.

However, in general, the lower emissions scenario is expected to result in a lower increase in global temperatures compared to the higher emissions scenario.

This means that the maximum expected temperature rise by the end of the century under the lower emissions scenario would be lower than that of the higher emissions scenario.

The specific temperature difference would depend on the specific projections and models used, but it highlights the significant impact that emissions reductions can have on mitigating future temperature increases.

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Taking into account the definition of percent yield, the percent yield of a reaction that had a theoretical yield of 3.76 g and an actual yield of 1.45 g. is 38.56%.

The percent yield is the ratio of the actual return to the theoretical return expressed as a percentage.

The percent yield is calculated as the experimental yield divided by the theoretical yield multiplied by 100%:

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

where:

In this case, you know:

Replacing in the definition of percent yield:

percent yield= (1.45 grams÷ 3.76 grams)×100%

Solving:

percent yield= 38.56%

Finally, the percent yield is 38.56%.

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If a student fails to fill the cuvette to ⅔ full with the reaction mixture, it will lead to an inaccurate measurement of absorbance values.

How does it affect?

The absorbance of a solution is the measure of the amount of light that a substance can absorb. Absorbance measurement is significant because it aids in determining the concentration of a substance in a solution.

However, the absorbance measurement can be influenced by various factors, and one of the major factors that could affect it is the amount of the reaction mixture put in the cuvette.If the cuvette is not filled up to ⅔ full with the reaction mixture, the amount of light that gets through the cuvette would be affected.

The amount of light that goes through the solution is dependent on the distance that light has to cover, which in turn is dependent on the depth of the solution in the cuvette.

Therefore, an incomplete solution volume would result in an inaccurate absorbance value. It's worth noting that an excessively full cuvette is also not ideal.

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