How can you separate a mixture of water, sand, pebbles, and paper clips?

The partial pressure of hydrogen in the collected gas sample is 733.0 mm Hg (calculated by subtracting the partial pressure of water, 17.0 mm Hg, from the total atmospheric pressure, 750.0 mm Hg).

When a gas is collected over water, the presence of water vapor affects the total pressure observed. In this case, the total atmospheric pressure is given as 750.0 mm Hg, and the partial pressure of water vapor at 19.5°C is 17.0 mm Hg.

To determine the partial pressure of hydrogen, we need to subtract the partial pressure of water vapor from the total atmospheric pressure. Partial pressure refers to the pressure exerted by an individual gas component in a mixture. In this scenario, the collected gas is primarily hydrogen, with water vapor being the other component.

By subtracting the partial pressure of water vapor (17.0 mm Hg) from the total atmospheric pressure (750.0 mm Hg), we can find the partial pressure of hydrogen:

Partial pressure of hydrogen = Total atmospheric pressure - Partial pressure of water vapor

Partial pressure of hydrogen = 750.0 mm Hg - 17.0 mm Hg

Partial pressure of hydrogen = 733.0 mm Hg

Therefore, the partial pressure of hydrogen in the collected gas sample is 733.0 mm Hg.

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The solution has a molarity of 0.0924 M.

The number of moles of solute per litre of solution is known as molarity.. For instance, water is both the solution and the solute when table salt is dissolved in it. Each mole of sodium chloride weighs 58.44 grammes. 58.44 grammes of sodium chloride are dissolved in one litre of water to produce one molar solution, or 1M.

Moles of solute per litre of solution is known as molarity (M).

Given: moles of NH3 = 0.355, volume of solution = 3.84 L

Molarity = 0.355 moles / 3.84 L = 0.0924 M

Therefore, the molarity of the solution is 0.0924 M.

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when a circuit is open the electricity fails to pass through any of the wire causing all the lights to go out. If the lights are in a straight line each light is on its own circuit to the power source.

Answer:

coral reef

Explanation:

No, it is not possible to fit one mole of people into a classroom.

One mole of anything is defined as the amount of that substance that contains the same number of particles as there are atoms in exactly 12 grams of carbon-12. This number is known as Avogadro's number and is equal to approximately 6.022 x 10²³.

Assuming that one person has an average mass of 70 kilograms, the mass of one mole of people would be approximately 70 kilograms x 6.022 x 10²³, which is equal to about 4.2 x 10²⁵ kilograms.

Clearly, this is an enormous mass, far too large to fit into any classroom or even any building on Earth. Therefore, it is not possible to fit one mole of people into a classroom.

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Answer:

One mole of people is 6.02x1023 people. That’s more people than there are in the entire world which is estimated to be about 7x109 people. So clearly the answer is NO.

Explanation:

Answer:

Mintu should chosen a material with a lower specific heat

Explanation:

I got the answer right on the test trust me it is correct

Answer:

To get a boy to like you you have to 1.dress up cutely  

2.talk to him ask him what he likes

3. wear a little bit of make-up not to much

4. wear you hair down and have a little bit of hair on your chest

5. Be really confident and don't wait till a really longg time and mess up like i did.

Explanation:

Answer:

Put your hair down. Also, dont use too much makeup. Just wear mascara and lipgloss. Be kind. Be confident.

Explanation:

If u wear to much makeup he will think ur a try-hard. Stop trying to be cool, it's just dumb. If ur rude, then hes gonna think that u dont like him.

\({ \boxed{ \purple{ \tt{6.5 \times {10}^{2} }}}}\)

Explanation:-

Applying,

\({ \blue{ \tt{ \frac{Strength \: of \: formic \: acid}{Strength \: of \: HCN}} \: = }} \: \: \: { \green{ \tt{ \sqrt{ \frac{K _{a}(formic \: acid)}{K _{a}(HCN)} }}}}\)

Degree of dissociation of HCOOH \( { \red{ \sf{( \alpha) = 14.5\%}}}\)\({ = \red{ \sf{ \frac{14.5}{100}}}} \)\({ = \red{ \sf{0.145}}}\)

\({ \purple{ \tt{ K_{a}(HCOOH) = C { \alpha }^{2}}}} \)

\({ \purple{ \tt{ K_{a}(HCOOH) = 0.01 \times {(0.145)}^{2} }}}\)

\({ \purple{ \tt{ K_{a}(HCOOH) = 2.1 \times {10}^{ - 4}}}} \)

Thus,

\({ \blue{ \tt{ \frac{Strength \: of \: formic \: acid}{Strength \: of \: HCN}} \: = }}{ \green{ \tt{ \sqrt{ \frac{2.1 \times {10}^{ - 4} }{4.9 \times {10}^{ - 10} } }}}}\)

\({ = \boxed{ { \red{ \sf{6.5 \times {10}^{2}}}}}} \)

i.e., formic acid is 6.5×10² times stronger than HCN or we can say that HCN is 6.5×10² times weaker than formic acid.

Answer:

Flooding and erosion hazards

Explanation:

The volume of air you might inhale (and exhale) in 8.00 hours is approximately 1903.2 liters.

To calculate the volume of air you might inhale (and exhale) in 8.00 hours, we need to determine the total number of breaths you take in that time and then multiply it by the volume of each breath.

First, let's calculate the number of breaths in 8.00 hours:

Number of breaths per minute = 13

Number of breaths per hour = 13 breaths/minute * 60 minutes/hour = 780 breaths/hour

Number of breaths in 8.00 hours = 780 breaths/hour * 8.00 hours = 6240 breaths

Now, let's calculate the volume of air in liters:

Volume of each breath = 0.305 liters

Volume of air inhaled and exhaled in 8.00 hours = Volume of each breath * Number of breaths in 8.00 hours

Volume of air inhaled and exhaled in 8.00 hours = 0.305 liters/breath * 6240 breaths = 1903.2 liters

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Answer:

2nd option

Explanation:

According to the balanced chemical equation, 2 KNO₃ is  produced during the replacement reaction of silver nitrate and potassium sulfate.

Chemical equation is a symbolic representation of a chemical reaction which is written in the form of symbols and chemical formulas.The reactants are present on the left hand side while the products are present on the right hand side.

A plus sign is present between reactants and products if they are more than one in any case and an arrow is present pointing towards the product side which indicates the direction of the reaction .There are coefficients present next to the chemical symbols and formulas .

The first chemical equation was put forth by Jean Beguin in 1615.By making use of chemical equations the direction of reaction ,state of reactants and products can be stated. In the chemical equations even the temperature to be maintained and catalyst can be mentioned.

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The charge on the ions in an ionic compound containing cobalt(III) and fluoride ions is Co³⁺ and F⁻¹ and the formula of the compound is CoF₃.

Ionic compounds are a type of chemical compound where the oppositely-charged ions of a metal and a nonmetal are attracted to each other to form an ionic bond.

The compound formed from the bonded ions will have very different properties from the elements that make up the compound.

While atoms are neutral because they have an equal number of protons and electrons, ions have a net charge and result when an atom loses or gains electrons.

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Answer:

If a value of 98° is added to the data, then the mean change is 1.35, if a value of 48° is added to the data, then the median change from the 6th number to the 7th number but the value still same, if a value of 80.8° is added to the data then the range still same.

In the given question we have to find the change in mean, median and range after the addition of another value.

(1) The list of average high temperatures in degrees for a city is

58, 61, 71, 77, 91, 100, 105, 102, 95, 82, 66, 57

So the mean is find as the sum of value divided by the total number of values.

As we see that the total number of values are 12.

Now the sum of values

∑x=58+61+71+77+91+100+105+102+95+82+66+57

∑x=965

Mean = ∑x/n

Mean = 965/12

Mean = 80.42

If a value of 98° is added to the data, then the sum of values will be

∑x'=58+61+71+77+91+100+105+102+95+82+66+57+98

∑x'=1063

The total number of values = 13

So the

Mean'=∑x'/n'

Mean'=1063/13

Mean'=81.77

Now the change in mean=Mean'−Mean

change in mean=81.77−80.42

change in mean=1.35

(2) The list of average high temperatures in degrees for a city is

58, 61, 71, 77, 91, 100, 105, 102, 95, 82, 66, 57

So the median is find after arranging the values in ascending order.

57, 58, 61, 66, 71, 77, 82, 91, 95, 100, 102, 105

Total number=12

Meadian=n/2 th number

Meadian=12/2 th number

Meadian=6 th number

Meadian= 77

If a value of 48° is added to the data.

So the ascending order of the number is

48, 57, 58, 61, 66, 71, 77, 82, 91, 95, 100, 102, 105

Total number=13

Meadian=(n+1)/2 th number

Meadian=13+1/2 th number

Meadian=14/2 th number

Meadian=7 th number

Meadian=77

Now the range changes from the 6th number to the 7th number but the value still same.

(3) The list of average high temperatures in degrees for a city is

58, 61, 71, 77, 91, 100, 105, 102, 95, 82, 66, 57

So the range is find after subtracting the greatest number to the smallest number.

So the range=Greatest Number−Largest Number

range=105−57

range=48

If a value of 80.8° is added to the data then the range still same because the added value is between the largest and smallest number.

Answer:

Yes

Explanation:

A krypton atom will remain the same despite changing the number of neutrons they contain.

The neutron is a nuclear particle found within an atom.

Answer:

A battery is matter.

Explanation:

The battery takes up space and has mass. And is only a carrying case for the energy, which means that it is matter.

-Hope this helped

Based on the potential energy diagram and the potential energies of reactant and product the synthesis and double replacement reactions are endothermic. The single replacement reaction is exothermic and the ΔH is negative.

Chemical processes referred to as endothermic reactions occur when the reactants take in heat energy from their environment to create products. The reaction absorbs energy from its surroundings. The energy that manifests as heat. Examples include cooking, evaporation, gas molecules, melting of ice, and photosynthesis.

An exothermic reaction is one in which energy is given off as heat or light. The mechanism releases energy into its surroundings. Energy can be emitted as sound, light, heat, or electricity. Examples include rusting iron, settling, chemical bonds, explosions, and nuclear fission.

A potential energy diagram, also known as a reaction progress curve, is a visual representation of the energy changes that take place during a chemical reaction. A diagram of potential energy illustrates how a system's potential energy changes as reactants are changed into products. Note that an exothermic reaction results in a negative enthalpy change while an endothermic reaction exhibits a positive enthalpy change. The diagrams of potential energy show this. When the system absorbs energy from its environment, its overall potential energy rises for the endothermic reaction. As the system undergoes the exothermic process, the system's overall potential energy declines.

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Answer:

A.) 1

Explanation:

Propane only exists in one conformation. It does not have enough carbons to form branches, and there are only hydrogens attached to each carbon. Furthermore, there is no way to twist the carbon or change its orientation (ex. cis- and trans-) to result in a different structure of propane. There is no other way to represent the molecule without drawing a different molecule.

A total of 1.5 moles of ammonia (NH₃) could be produced.

To react with 56.0 g of N₂, 6.000 moles of H₂ gas are required.

A. We need to balance the chemical equation first:

N₂ + 3H₂ → 2NH₃

From the balanced equation, we can see that 1 mole of N₂ reacts with 3 moles of H₂ to produce 2 moles of NH₃.

Therefore, if 0.75 moles of N₂ are reacted with enough hydrogen gas, we can calculate the moles of NH₃ produced using the mole ratio:

0.75 moles N₂ × (2 moles NH₃ / 1 mole N₂) = 1.5 moles NH₃

Therefore, 1.5 moles of NH₃ can be produced.

B. We can use the molar mass of N₂ to convert 56.0 g of N₂ to moles:

56.0 g N₂ × (1 mole N₂ / 28.02 g) = 2.000 mole N₂

From the balanced equation, we know that 1 mole of N₂ reacts with 3 moles of H₂ to produce 2 moles of NH₃.

Therefore, the moles of H₂ required can be calculated using the mole ratio:

2.000 mole N₂ × (3 mole H₂ / 1 mole N₂) = 6.000 mole H₂

Therefore, 6.000 moles of H₂ are needed to react with 56.0 g of N₂.

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The balanced reaction equation is;

C2H5OH + 3O2 → 2CO2 + 3H2O

Balancing a chemical equation by atom count involves adjusting the coefficients (the numbers in front of each chemical formula) so that the number of atoms of each element is equal on both sides of the equation. Here are the steps to follow:

Write the unbalanced chemical equation, including the correct chemical formulas for each reactant and product.

Count the number of atoms of each element on both sides of the equation.

Determine which elements are not balanced by comparing the number of atoms on each side.

Choose one element that is not balanced, and start by balancing it on one side of the equation.

Add coefficients to the other reactants and products in the equation until the number of atoms of that element is balanced on both sides.

Repeat this process for each element that is not balanced until the equation is balanced.

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KH2PO4 is a more suitable choice as a buffer because it has a greater buffering capacity due to the presence of the weak acid and its conjugate base.

KHPo4 is not considered an effective buffer compared to KH2PO4 due to its limited buffering capacity. The effectiveness of a buffer is determined by the concentration and dissociation properties of its conjugate acid-base pair.

KH2PO4 is a salt composed of the weak acid H2PO4- and its conjugate base HPO4^2-. In an aqueous solution, KH2PO4 can dissociate to release H+ ions from the H2PO4- component, which acts as a weak acid, and the HPO4^2- component can accept H+ ions, acting as a weak base. This allows KH2PO4 to effectively resist changes in pH when small amounts of acid or base are added to the solution.

On the other hand, KHPo4 consists of the strong acid H3PO4 and the weak base HPO4^2-. H3PO4 fully dissociates in water, providing a large concentration of H+ ions, making it difficult for the HPO4^2- to effectively act as a base and maintain pH stability.

Therefore, KH2PO4 is a more suitable choice as a buffer because it has a greater buffering capacity due to the presence of the weak acid and its conjugate base.

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Answer: 380 J. Please mark

Explanation:

114.5 g is the total mass of the beaker .

Total mass of beaker=53.10g+5.348g+ 56.1g

Total mass=114.5 g

Mass is used in physics to specific inertia, a fundamental function of all remember. basically, it's far a mass of rely's resistance to changing its course or pace in response to the software of a force.

The exchange that an applied force produces is smaller the extra mass a body has. The kilogram, the unit of mass within the international machine of gadgets, corresponds to 6.62607015 1034 joule seconds using Planck's consistent (SI). One joule is produced by way of multiplying one kilogram by means of one rectangular meter per 2d.

The kilogram is decided by genuine measurements of Planck's regular on account that the second one and the meter have formerly been described in phrases of other bodily constants.

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There are 1200 grams of the 0.5% propanoic acid solution is needed to dissolve 6 grams of hydroxyapatite. The mass of SiO2 contained in 2 g of high-fusing porcelain is 1.4 grams.  12.57 grams sulphate dihydrate must be heated to get 10 grams of sulphate hemihydrates.

Mass of propanoic acid in 1 gram of solution = (0.5/100) grams

Mass of propanoic acid in X grams of solution = (0.5/100) × X grams

the propanoic acid solution is 0.5% (0.5/100), it intends there is 0.005 grams of propanoic acid in 1 gram of the solution.

Now relay on the proportion:

(0.005 grams of propanoic acid) / (1 gram of solution) = (6 grams of hydroxyapatite) / (X grams of solution)

Cross-multiplying, we get:

0.005 × X = 6

Solving for X:

X = 6 / 0.005

X = 1200 grams.

Therefore, 1200 grams of the 0.5% propanoic acid solution is needed to dissolve 6 grams of hydroxyapatite.

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The structural formula of butanol is C4H9OH. It consists of a chain of four carbon atoms, with a hydroxyl (-OH) group attached to one of the carbon atoms. Butanol has several structural isomers, which have the same molecular formula but different structural formulas.

A structural isomer is a compound that has the same molecular formula as another compound but has a different arrangement of its atoms. A string of 4 C atoms are bonded above, below, left, and right to H, except the second C, which is bonded below to O, which is bonded below to H is a structural isomer of butanol.

This is called butan-2-ol. The structural formula of butan-2-ol is CH3CH(OH)CH2CH3. In this isomer, the hydroxyl group is attached to the second carbon atom in the chain, whereas in butanol, the hydroxyl group is attached to the first carbon atom in the chain.

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Answer:Molecular Formula SO2

Hybridization Type sp2

Bond Angle 119o

Geometry V-Shaped or Bent

Explanation:

hope this helped <3

Answer:

its A

Explanation:

The only one that makes sense

Answer:

Neutral solutions have an equal number of H+ ions and OH- ions. Acidic solutions have a higher H+ concentration. An acid is a substance that releases H+ when dissolved in water. Basic solutions have a low H+ concentration.