what mass (g) of CaF2 is formed when 47.8mL of 0.334 M NaF is treated with an excess of aqueous calcium nitrate? what type of reaction is this?

First, find the number of moles it must contain.

Where n is the number of moles, c = 0.5 and V = 600 mL. But, we need to use the volume in Liters, so we divide 600mL by 1000.

Once we have the correct unit, find n.

Now, we need to know what volume would contain 0.3 moles, using the same formula.

Where n = 0.3 moles and c = 1.2 mol/L.

At last, transform 0.25 Liters into mL.

Therefore, the volume is 250 mL.

Mole measure the number of elementary entities of a given substance that are present in a given sample. Therefore, one mole of each element not have the same mass as mole is directly proportional to the given mass.

The SI unit of amount of substance in chemistry is mole. The mole is used to measure the quantity or amount of substance. We know one mole of any element contains 6.022×10²³ atoms which is also called Avogadro number.

Mathematically,

mole =given mass ÷ molar mass

For carbon                                                                            For sulfur

number of moles of carbon= 1                      number of moles of sulfur=1            

mass of 1 mole of carbon=12g                      mass of 1 mole of sulfur=32 gram

From calculation

Molar mass of carbon=12g/mol               Molar mass of sulfur=32g/mol

Therefore, one mole of each element not have the same mass as mole is directly proportional to the given mass.

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The structure of  the alkyne 4 - decyne is shown in the image attached.

Alkyne functional group compounds with a triple bond made of carbon and carbon contain 4-decyne (C). The triple bond is found at the fourth carbon position in the ten-carbon chain (decyne) of 4-decyne.

Nine hydrogen atoms (H) are joined to the first nine carbon atoms (C), starting from the left side.

In conclusion, 4-decyne is made up of a chain of ten carbon atoms, with the fourth carbon atom serving as the center of a carbon-carbon triple bond (C). Except for the carbon involved in the triple bond, all carbon atoms are connected to hydrogen atoms.

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Answer:

Percent yield of reaction is 150%.

Explanation:

Given data:

Percent yield = ?

Actual yield of SO₃ = 586.0 g

Mass of SO₂ = 705.0 g

Mass of O₂ = 80.0 g

Solution:

Chemical equation:

2SO₂ + O₂      →     2SO₃

Number of moles of SO₂:

Number of moles = mass/ molar mass

Number of moles = 586.0 g/ 64.1 g/mol

Number of moles = 9.1 mol

Number of moles of O₂:

Number of moles = mass/ molar mass

Number of moles = 80.0 g/ 32g/mol

Number of moles = 2.5 mol

Now we will compare the mole of SO₃ with O₂ and SO₂.

                      SO₂          :          SO₃

                        2             :            2

                     9.1              :           9.1

                       O₂            :          SO₃

                        1              :            2

                     2.5             :           2×2.5 = 5

The number of moles of SO₃ produced by oxygen are less it will limiting reactant.

Theoretical yield of SO₃:

Mass = number of moles × molar mass

Mass = 5 mol × 80.1 g/mol

Mass = 400.5 g

Percent yield of reaction:

Percent yield = actual yield / theoretical yield  × 100

Percent yield = 586.0 g/ 400.5 g× 100

Percent yield = 1.5× 100

Percent yield = 150%

Explanation:

 solution of water and vinegar is a homogeneous solution.

This is because they mix ‘evenly’ - any part of the solution is like any other part of it.

The two chemical compounds are not the same, because their ratio is not equal. In both samples the composition of lead and oxygen is different.

A chemical compound is a substance made of numerous similar molecules (or molecular entities) joined by chemical bonds and comprising atoms from various chemical elements. Therefore, a molecule made up of only one type of atom is not a compound. Chemical reactions, which may entail interactions with other molecules, can change a compound into a distinct substance. Atomic bonds may be broken or new ones created during this process.

sample 1 = mass of lead / mass of oxygen = 12.92g/2g = 6.46 .

sample 2 = mass of lead/ mass of oxygen = 34.27 - 14.39/14.39 = 1.38 .

so, the ratios are not the same.

Hence, the two chemical compounds are not the same, because their ratio is not equal. In both samples the composition of lead and oxygen is different.

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Explanation:

aluminium

proton= 13

electron=13

neutron=27

nitrogen

proton= 7

electron=7

neutron= 14

This angle is greater than the right angle. The correct option is A.

The right angle is created when two straight lines cross at a 90° angle, or when they are perpendicular at the intersection. The symbol ∟ represents a right angle.

Look at this angle in the picture. This angle is greater than a right angle. The right angle is 90 degrees, and the angle is greater than the right angle. The angle can be 95 degrees.

Therefore, the correct option is A. greater than a right angle. A right angle looks like the corner of a square.

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The question is incomplete. Your most probably complete question is given below:

A. greater than a right angle

B equal to a right angle

C less than a right angle

When the equilibrium constant is higher than one, it indicates that the reaction prefers to produce products, whereas if the equilibrium constant is less than one, it indicates that the reaction prefers to produce reactants. If the equilibrium constant is equal to one, the reaction proceeds in both directions equally.

In a chemical reaction, exothermic reactions are defined as reactions that release heat into their environment. It implies that heat is given off when reactants are converted to products. At equilibrium, an exothermic reaction continues to be exothermic, meaning that heat is given off even after the reaction reaches a state of equilibrium.There are two types of reactions: exothermic and endothermic.

A reaction is classified as exothermic if it releases heat, and endothermic if it absorbs heat. The direction of the reaction is determined by whether it is exothermic or endothermic. At equilibrium, the reaction is no longer moving forwards or backwards. It's also worth noting that reactions can be exothermic in one direction and endothermic in the other.

The equilibrium constant (K) is defined as the ratio of the concentration of products to the concentration of reactants in the chemical reaction equation. It is used to express how much of the products is generated by the reaction in comparison to the reactants.  the equilibrium constant aids in the identification of the direction in which the reaction will proceed at equilibrium.

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The student's method for preparing pure crystals of copper sulfate contains errors and does not produce the desired outcome.

Use copper oxide instead of calcium carbonate: The student should add copper oxide (CuO) to the hydrochloric acid instead of calcium carbonate. Copper oxide reacts with hydrochloric acid to form copper chloride, which can then be converted to copper sulfate through a subsequent reaction with sulfuric acid.

Add sulfuric acid to the copper chloride solution: After the copper chloride solution is formed, the student should add sulfuric acid to it. This reaction between copper chloride and sulfuric acid will yield copper sulfate and hydrochloric acid. The student should ensure that the correct stoichiometric ratio is maintained to maximize the yield of copper sulfate crystals.

Crystal formation: The student should allow the solution to cool slowly after the reaction with sulfuric acid. This promotes the formation of larger, well-defined copper sulfate crystals.

Filtration and drying: Once the crystals have formed, the student should filter the solution to separate the solid crystals from the remaining liquid. The filtered crystals should then be thoroughly dried to remove any remaining water, resulting in pure copper sulfate crystals.

By following these improvements, the student can obtain pure crystals of copper sulfate.

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The reagents that can be used to achieve of the following transformation is Na2Cr207, H2S04, H20 and PCC, CH2Cl2.

What is chemical reaction?

One or more chemicals, known as reactants, are changed into one or more new substances, known as products, during a chemical reaction. Chemical elements or chemical compounds constitute substances.

In the chemical reaction, 2 butanol is converted to 2 butanone by using oxidizing agent like PCC, ch2cl2 or other reagent is na2cr2o7, h2so4, h2o used this reagent where secondary alcohol is converted to ketone.

Therefore, the reagents that can be used to achieve of the following transformation is Na2Cr207, H2S04, H20 and PCC, CH2Cl2.

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Answer:

ΔH of the reaction is -802.3kJ.

Explanation:

Using Hess's law, you can know ΔH of reaction by the sum of ΔH's of half-reactions.

Using the reactions:

(1) Cgraphite(s)+ 2H₂(g) → CH₄(g) ΔH₁ = −74.80kJ

(2) Cgraphite(s)+ O₂(g) → CO₂(g) ΔH₂ = −393.5k J

(3) H₂(g) + 1/2 O₂(g) → H₂O(g) ΔH₃ = −241.80kJ

The sum of (2) - (1) produce:

CH₄(g) + O₂(g) → CO₂(g) + 2H₂(g) ΔH' = -393.5kJ - (-74.80kJ) = -318.7kJ

And the sum of this reaction with 2×(3) produce:

CH₄(g) + 2 O₂(g) → CO₂(g) + 2H₂O(g) And ΔH = -318.7kJ + 2×(-241.80kJ) =

-802.3kJ

The molar mass of the gas is obtained as 32.1 g/mol.

The molar mass has to do with the mass one mole of a substance. We know that according to the question, we can be able to obtain the number of moles of the compound from the ideal gas equation.

This is how we are able to get the number of moles of the gas as 0.14 moles. Now we need to use the information that we have to get the molar mass of the gass.

Number of moles = mass/ molar mass

Molar mass = mass/Number of moles

Molar mass =  4.5g/0.14  moles

= 32.1 g/mol

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The mass percentage of C in morphine would be 4.21%.

The mass percentage of a composition in a compound is the mass of the composition relative to the mass of the entire compound. This can be mathematically expressed as:

Mass percentage = mass of component/mass of substance x 100%

In this case, we are looking for the mass percentage of C in \(C_{17}H_{19}NO_3\).

Molar weight of C = 12 g/mol

Molar mass of  \(C_{17}H_{19}NO_3\) = (12x17) + (1x19) + (14x1) + (16x3)

                                             = 285 g/mol

Mass percentage of C = 12/285

                                     = 4.21% to 2 decimal places.

In other words, the mass percentage of C in morphine is 4.21%.

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Answer:

9x4500=40,500. which is a little more then what you need but it will still be a little more but it will take around 40500 days to run around the world.

Answer:

chemical cells that produce an electrical current

Explanation:

lead acid battery is a type of chemical cell, that discharges to produce electrical current.

lead acid battery uses  lead peroxide for the conversion of the chemical energy into electrical power when it is discharging. It is also rechargeable, that is, it can convert electrical energy back to chemical energy during charging.

Thus, a discharging lead acid battery is best described as a chemical cells that produce an electrical current

Answer:

The correct option is;

2.) Chemical cells that produce an electric current

Explanation:

A discharging lead-acid battery is an electrochemical cell that produces electrical energy through the chemical reaction taking place at the battery electrodes which have lead as the anode and lead oxide as the cathode which result in the flow of an electric current, thereby converting chemical energy of the lead, lead oxide and aqueous sulfuric acid system into electrical energy, therefore, it is a chemical cell that produces an electric current.

Answer:

A

Explanation:

An element is a substance, made up of atoms of the same substance and has independent existence. An element cannot be broken up by physical or chemical processes.

If we look at the images closely, image A represents a substance made up of the same kind of atoms. All the balls are exactly of the same colour and type, hence the answer.

ANSWER

The total pressure of the gas inside the tank is 119 atm

EXPLANATION

Given that

The partial pressure of O2 is 45 atm

The partial pressure of N2 is 9 atm

The partial pressure of He is 65 atm

Follow the pressure below to find the total pressure of the mixture

Dalton's law of partial pressure states that the total pressure exerted by a mixture of gases is equal to the summation of the partial pressure of the individual gases.

Mathematically,

Substitute the given data into the formula above

Therefore, the total pressure of the gas inside the tank is 119 atm

Answer:

Its bread My guy. Maholo my dudes.

Explanation:

Answer with Explanation:

Different versions of a gene are called alleles. Alleles are described as either dominant or recessive depending on their associated traits. Since human cells carry two copies of each chromosome they have two versions of each gene.

Answer:

The final temperature of the copper would be 311.3°C.

I hope this helps you

Since lighter molecules are moving faster, they escape from an atmosphere more often than more massive ones.

The escape velocity is the velocity that an object must be given in order to escape from the gravitational field of the earth. We must know that a less massive molecule moves faster than a more massive molecule.

Hence, less massive molecules tend to escape from an atmosphere more often than more massive ones because they are moving faster.

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The specific heat capacity and molar heat capacity of the metal cannot be determined due to missing values.

However, the values can be obtained using the formula below:

The specific heat capacity and molar heat capacity of the metal are calculated using the formula below:

ΔH₁ + ΔHcalorimeter + ΔH₂ = 0

where:

ΔH₁ is the heat change of the water = m₁Cwater(Tfinal - T1)

ΔHcalorimeter is heat change of the = Ccalorimeter(Tfinal - T1)

ΔH₂  is the heat change of the metal = m₂c₂(Tfinal - T2)

ΔH₁ = 99.45 * 4.184 * (23.9 - 19.5)

ΔH₁ = 1830.83 J

ΔHcalorimeter = Ccalorimeter * 23.9 - 19.5

The heat capacity of the calorimeter is not given, therefor the specific heat capacity and molar heat capacity of the metal cannot be determined.

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The engineers do next to find out if the sole of the shoe can be redesigned. Therefore, option B is correct.

The trial experiment is defined as the application of the research product to a specific population before it is introduced to the market.

The effect of the research to the greater percentage of the subject made the product to the market.

The engineering shoe product was only effective for a small percentage of the population, making it less effective. It has been discovered that the knee problem is related to the shoe sole.

Thus, option B is correct.

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Your question is incomplete, most probably your question was

A group of engineers has just conducted an experimental trial on a shoe

designed to help people suffering from a painful foot disorder. During the trial,

the shoe proved effective for only 5% of the test subjects. What should the

engineers do next?

A. Use a cheaper material to make the shoe more profitable.

O

B. Find out if the sole of the shoe can be redesigned

O

C. Begin to market this new shoe to patients and doctors.

D. Conduct the test again.

Answer:

because iron is magnetic and sand is not

Explanation:

Answer:

0.0006 kg

Explanation:

hope this helped

The equation MgO + 2HCl → MgCl₂ + H₂O is  a balanced equation.

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