0. 820 mole of hydrogen gas has a volume of 2. 00 l at a certain temperature and pressure. What is the volume of 0. 125 mol of this gas at the same temperature and pressure?

Answer:

A) CH4 and C8H18

Explanation:

Explanation:

when a weak acid and a strong based are mixed they react the pH can be determined by consider ing the equilibrium

Answer:

The reactants

Explanation:

The molecules on the left side of the reaction are the reactants. Reactants are the molecules which react with one another to form something new.

The molecules on the right side of the reaction are the products. Products are the molecules that form in response to the reaction.

Explanation:

Making a salt from an alkali

If you are using an alkali - which is a soluble base - then you need to add just enough acid to make a neutral solution (check a small sample with universal indicator paper).

Warm the salt solution to evaporate the water. You get larger crystals if you evaporate the water slowly.

The new pH of the solution after the addition of water would be 13.22.

V(total) = 609 ml + 594 ml

V(total) = 1203 ml

C = (594 ml)/(1203 ml)

C = 0.493

pOH = -log(0.493)

pOH = 0.31

New pH of the solution = 13.5292 - 0.31 = 13.22

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Hydrobrome Aicd

I think so...

Answer:

[tex]\fbox {1,2-di bromo pentane}[/tex]

Explanation:

⇒ Bromine atoms present on 1st and 2nd Carbon atoms

⇒ 5 carbon atoms

⇒ Only single bonds

Hence, the IUPAC name will be :

1,2-dibromopentane

Answer:

Dalton law states that the partial pressure of a gas in a mixture of gases is equal to the total pressure of the mixture.

The answer to this question is change in temperature will be 6.1 and specific specific heat capacity of metal will be 1698.36.

According to the formula of Calorimetry

Q = msΔT

where, Q = Quantity of heat absorbed (in joules)

M = Mass of water sample given (in kilogram)

S = specific heat capacity of metal

ΔT = Change in temperature

We have given,

Mass as 25 gram which is equal to 0.025 Kg.

Change in temperature as 6.1

Quantity of heat absorbed as 259 J

Applying to the formula of Calorimetry

Q = msΔT

259 = 0.025 × s × 6.1

s = 1698.36

So, specific heat capacity of metal came out to be 1698.36 and the change in temperature will be 6.1

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Answer: specific heat is 1.7

Explanation:

after you answer this question itll then tell you to find the specific heat

After reducing the starting volume, the gas has a resultant pressure of 3 atm.

Describe Boyle's Law.

Boyle's Law states that a gas's pressure is inversely proportionate to its volume at constant temperature:

P ∝ 1/V

The necessary equation for the posed question is:

P1V1 = P2V2, and

Initial pressure is P1 and is 1.5 atm.

Initial volume = 2 L for V1.

final pressure = P2 =?

Final volume = 1 L, or V2.

Using the aforementioned equation and all of these data, we obtain

P₂ = [tex]\frac{(1.5x2)}{1}[/tex]= 3atm

Therefore, 3 atm of pressure is needed.

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Solubility limit. that's the answer

Answer:

101.18 grams

Explanation:

From the equation you can see that the same number of MOLES will be required as MOLES of aluminum chloride produced.

Mole weight of aluminum chloride = 26.981 + 3 * 35.45 = 133.331 gm

     500 gms of this is then    500 / 133.331 = 3.75 moles

So you need 3.75 moles of aluminum

    3.75 moles * 26.981 g/mole = 101.18 grams of Al

101.07 grams of aluminum (Al) are required to produce 500 grams of aluminum chloride (AlCl₃) according to the given chemical equation.

Mass is a fundamental physical property of matter that represents the amount of substance contained in an object. It is a measure of the total amount of matter or material in an object, and it is typically measured in units such as grams (g) or kilograms (kg).

Molar mass, also known as molecular mass or formula mass, is the mass of one mole of a chemical substance. It is usually expressed in grams per mole (g/mol). Molar mass is a fundamental concept in chemistry that allows scientists to relate the mass of a substance to the number of moles it contains.

The balanced chemical equation is:

2Al + 3Cl₂ → 2AlCl₃

From the balanced equation, 2 moles of aluminum (Al) react with 3 moles of chlorine gas (Cl₂) to produce 2 moles of aluminum chloride (AlCl₃).

Molar mass of Al = 26.98 g/mol

Molar mass of Cl = 35.45 g/mol

Molar mass of AlCl₃ = 2 × (26.98 g/mol) + 3 × (35.45 g/mol)

= 133.34 g/mol

moles of AlCl₃ = mass / molar mass

moles of AlCl₃ = 500 g / 133.34 g/mol

= 3.749 moles

In the reaction, 2 moles of Al react to produce 2 moles of AlCl₃.

Therefore, moles of Al = moles of AlCl₃

moles of Al = 3.749 moles

Step 4: Calculate the mass of Al required:

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

mass of Al = 3.749 moles × 26.98 g/mol

= 101.07 g

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Translocation can be investigated by using radioactively labelled tracers, which are absorbed into glucose during photosynthesis.

Translocation can be defined as a biological process which involves the transfer (movement) of water and other soluble nutrients from one part of a plant to another, especially through the xylem and phloem.

Generally, translocation can be investigated by using radioactively labelled tracers, which are absorbed into glucose during photosynthesis. Also, an x-ray turns black when exposed to this biological process in plants.

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Answer:

a)

Explanation:

4th is incorrect.

Alkaline solutions are yellow in methyl orange.

Which statements about acids and bases are correct ?

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The volume of the tin piece in cubic centimetres is 4.3 cm³

A graduated cylinder is a standard piece of laboratory glassware used to measure the volume of an object or amount of liquid. As its name indicates, it is a glass cylinder with marks along the side similar to those on a measuring cup.

When adding an object to a liquid, the displayed volume difference corresponds to the volume of the added object.

In this way, to find the value of the object's volume, subtract the initial volume from the final volume:

16.8ml - 12.5ml = 4.3ml

To convert to cubic centimetres, the conversion scale of volume and length measurements need to be used, finding that mL is equal to cubic centimetres. So, the final answer is:

4.3 cm³

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The difference in an area with high concentration and an area with low concentration is called the concentration gradient.

A concentration gradient occurs when the concentration of particles is higher in one area than another.

In passive transport, particles will diffuse down a concentration gradient, from areas of higher concentration to areas of lower concentration, until they are evenly spaced.

This difference in an area with high concentration and an area with low concentration is called the concentration gradient.

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Answer:

See Below

Explanation:

'an aerobic ' means it does not use oxygen

Answer:

anaerobic

Explanation:

The approximate partial pressure of oxygen at 1500 m is 0.18 atm.

From barometric pressure table;

1500 m = 85 kPa

1 kPa = 0.0099 atm

85 kPa = ?

= 0.84 atm

Oxygen percentage in air  = 21%

P = 0.21 x P(total)

P = 0.21 x 0.84 atm

P = 0.18 atm

Thus, the approximate partial pressure of oxygen at 1500 m is 0.18 atm.

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Answer:

8.00

Explanation:

I hope the spurs get wembanyama so bad

In the given heating curve, Particles of the substance have the most kinetic energy when the substance is (a) 1. A gas. The part of the graph that represents where the substance has the least amount of potential energy is labeled (b) 1. Solid.

The heating curve is the relationship between the heating system supply temperature and the outside air temperature.

Gas molecules have the highest average velocities among the three states of matter so gas has the highest kinetic energy.

During freezing, a substance loses a lot of potential energy so solid has the least potential energy.

Hence, In the given heating curve, Particles of the substance have the most kinetic energy when the substance is (a) 1. A gas.

The part of the graph that represents where the substance has the least amount of potential energy is labeled (b) 1. Solid.

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The number of grams of oxygen present in a sample of this compound that contains 40.00 grams of S = 29.9g of oxygen

The compound contains the following:

sulphur = 57.20%

Oxygen= 100 - 57.20 = 42.80%

If 57.20% of the sample contains 40g of sulphur then 42.80% of the sample will contain X.

Make X the subject of formula,

X = 42.8 × 40/57.20

X= 1712/57.20

X= 29.9g of oxygen

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The weight of water produced from the complete reaction of 12.25 moles of Hydrogen is  73.5 g water

Hydrogen can be used in fuel cells to generate electricity, or power and heat.

Today, hydrogen is most commonly used in petroleum refining and fertilizer production, while transportation and utilities are emerging markets.

As according to given chemical equation,

3 moles of H₂ produces 1 mole (18 g) of water

Therefore,

The weight of water produced by 12.25 mole of hyrdogen will be ;

                                                            =  18 / 3 x 12.25 =  73.5 g water

Hence , The weight of water produced from the complete reaction of 12.25 moles of Hydrogen is  73.5 g water

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2 moles of Na3PO4 form from 6.0 mol NaOH. Details about stoichiometry can be found below.

The number of moles of a substance can be calculated stoichiometrically as follows:

3NaOH + H3PO4 → 3H₂O + Na3PO4

According to this equation,

3 moles of NaOH produces 1 mole of Na3PO4

This means that 6 moles of NaOH will produce 6/3 = 2 moles of Na3PO4

Therefore, 2 moles of Na3PO4 form from 6.0 mol NaOH.

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The H₂ gas are needed 0.157moles to fill the bag .

For solving this problem  we use the ideal gas equation. It is also called the general gas equation . This equation use for a hypothetical ideal gas. . It has several limitations. It was first stated by Benoit Paul Emile Clapeyron in 1834 . The ideal gas law is  written by an empirical form:

                                  PV = n R T

where-

            P = Pressure

            V = volume

            T = Temperature

            n =  The amount of substance

            R =  Ideal gas constant

Now we have the values of these terms as-

             P = 1 atm , V = 3.79L ,  T = 293K

 and     R = 0.0826 L/atm

For getting moles of hydrogen we can use the values of variables in ideal gas equation as -

                     P V = n R T

Now              (1 atm) × ( 3.79L ) = n ×  ( 0.0826 L/atm)  × ( 293K)

                                            n = (1 × 3.79) ÷ (0.0826 x 293)

                                              =  0.157 moles

So that the 0.157moles of H₂ gas are needed for fill the bag .

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the percent yield of the reaction is 100%.

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

% yield = actual yield / theoretical yield * 100%

% yield of a reaction in this case Rate

In this case, the molar mass of NaBr is 102.9 g / mol, as you know:

444 actual yield = 7.08 mol x 102.9 g / mol = 728.532 g

theoretical yield = 7.08 mol x 102.9 g / mol = 728.532 g

, Replaced by the definition of percent yield:

percent yield = 728.532 grams / 728.532 grams * 100%

percent yield = 100%

Finally, the percent yield of the reaction is 100%.

FeBr3 is iron bromide. Also known as iron bromide. Iron bromide is an ionic compound in which iron is in a +3 oxidation state.

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Answer: 87%

Explanation:

[tex]\quad \huge \quad \quad \boxed{ \tt \:Answer }[/tex]

[tex]\qquad \tt \rightarrow \:2.8 × {10}^{-5}[/tex]

____________________________________

[tex] \large \tt Solution \: : [/tex]

[tex]\qquad \tt \rightarrow \: \dfrac{2.36 \times 10 {}^{ - 2} }{8.4 \times {10}^{2} } [/tex]

[tex]\qquad \tt \rightarrow \: \dfrac{2.36 }{8.4 } \times \cfrac{10 {}^{ - 2} }{10 {}^{2} } [/tex]

[tex]\qquad \tt \rightarrow \: 0.28 \times 10 {}^{ - 2 - 2} [/tex]

[tex]\qquad \tt \rightarrow \: 0.28 \times 10 {}^{ - 4} [/tex]

[tex]\qquad \tt \rightarrow \: 2.8 \times 10 {}^{ - 5} [/tex]

Answered by : ❝ AǫᴜᴀWɪᴢ ❞

Answer:

P total = 1.25 atm

neon = 0.68 atm

argon= 0.35 atm

helium= x

1.25=0.68+0.35+x

1.25-0.68-0.35=x

x=0.22 atm

The molarity of the unknown solution will be 1.310 M.It is denoted by M₂.

Molarity is defined as the ratio of the moles to the volume of the solution.

Given data;

Volume of unknown solution,V₁ = 10.5 mL

The volume of diluted solution,V₂ = 80.0 mL

Molarity of new solution,M₁ = 0.172 M

Molarity of unknown solution, M₂=?

For dilution we use the formula as;

M₁V₁=M₂V₂

M₂=M₂V₂/V₁

M₂ = ( 80 × 0.172 ) / 10.5

M₂= 1.310 M

Hence the molarity of the unknown solution will be 1.310 M.

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Answer:

See below

Explanation:

NO + O3   ====>   NO2  + O2            (ozone is O3)