10. What is the molality of a solution
containing 288 g of calcium chloride
dissolved in 2.04 kg of water?

Answer:

96%

Explanation:

To find the percent yield, we can use this equation

\(\frac{Actual}{Theoretical} *100\)

The actual yield of aspirin is 3.0 and the theoretical is 3.14 in this case, so just plug the numbers in.

\(\frac{3.0}{3.14} *100\\\\ =96\)

Thus the percent yield is 96%

;)

The decomposition of aspirin (acetylsalicylic acid,\(C_{9} H_{8} O_{4}\)) can occur through the hydrolysis reaction, resulting in the formation of acetic acid (\(CH_{3} COOH\)) and salicylic acid (\(C_{7} H_{6}O_{3}\)).

The decomposition of aspirin (acetylsalicylic acid, \(C_{9} H_{8} O_{4}\)) can occur through the hydrolysis reaction, resulting in the formation of acetic acid (\(CH_{3} COOH\)) and salicylic acid (\(C_{7} H_{6}O_{3}\)). To determine the moles of each product formed, we need to consider the balanced chemical equation for the reaction:

\(C_{9} H_{8} O_{4} = > C_{7} H_{6}O_{3} +CH_{3} COOH\)

From the equation, we can see that for every 1 mole of aspirin, 1 mole of salicylic acid and 1 mole of acetic acid are produced.

Therefore, the moles of salicylic acid and acetic acid formed will be equal to the number of moles of aspirin that decomposes. If we know the amount of aspirin in moles, we can directly calculate the moles of each product based on stoichiometry.

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Answer:

B. Producers and decomposers

Explanation:

Producers aka plants convert raw energy into chemical energy.

Decomposers are responsible for decomposing dead organisms.

Answer:

the answer is b

Explanation:

Because it provides for the restoration of the life cycle

Answer:

True

Explanation:

Hydrogen bonding is a bond that exists between hydrogen and a highly electronegative element such as oxygen, nitrogen, fluorine etc.

The greater solubility of the triphenylphosphine oxide owes to the hydrogen bonded interaction between it and the 1-propanol.

The alkene lacks such hydrogen bonded interaction because it does not have a highly electronegative atom in its structure.

Hence, triphenylphosphine oxide is removed based on its polarity and hydrogen bonding ability.

The element that has the same number of valence electrons as phosphorus and the same number of electron shells as iodine is Antimony,  Sb.

Valence electrons are the electrons that are found in the outermost shell of an atom of an element.

The number of valence electrons in an atom determines the group to which the elements belong.

Electron shells are the shells in an atom to which an electron is fed into the atom. An electron shell determines the period an element belongs to.

Phosphorus has 5 valence electrons, hence belongs to group 5A or 15.

Iodine has 5 electron shells, hence belongs to period 5.

The element that belongs to group 5A period 5 is antimony.

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One important chemical reaction in our daily life is the process of cellular respiration, which occurs in living organisms to produce energy in the form of ATP.

The reaction involves the breakdown of glucose, a type of sugar, into carbon dioxide and water, and the release of energy in the process. The general equation for cellular respiration is,

\(C_{6} H_{12} O_{6}\) + \(6O_{2}\) → \(6CO_{2}\) + \(6H_{2}O\) + energy (ATP)

This reaction occurs continuously in our cells, providing the energy needed for various cellular activities and bodily functions. Without cellular respiration, we would not be able to survive.

Another important application of chemical reactions in daily life is in the production of food. Cooking food involves various chemical reactions, including the breakdown of complex carbohydrates and proteins into simpler molecules, the caramelization of sugars, and the Maillard reaction between amino acids and reducing sugars. These reactions help to create the flavor, aroma, and texture of the food we eat.

In addition, chemical reactions are also used in the production of many consumer products, such as cleaning agents, cosmetics, and pharmaceuticals. The chemical reactions involved in these products are carefully designed and controlled to ensure their effectiveness and safety for use.

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Answer:

Metals lose electrons when reacting with nonmetals, so the red sphere represents a metal.

Answer:

.Combination

Explanation:

Answer:

actually i am pretty sure that the answer is decomposition 1

Answer: a + 2

Explanation: Alkali Earths or Group II has an ionization charge of a + 2. Alkali Metals have a ionization a + 1. Halogens or cold elements have a ionization of a +3.

Answer:

only god knows

Explanation:

Answer: At convergent plate boundaries, oceanic crust is often forced down into the mantle where it begins to melt. Magma rises into and through the other plate, solidifying into granite, the rock that makes up the continents. Thus, at convergent boundaries, continental crust is created and oceanic crust is destroyed.

Explanation:

i dont know if that helps, i looked it up

Answer:

0.0238 moles NaOH

Explanation:

To find the amount of moles, you need to

(1) convert the volume from mL to L (1,000 mL = 1 L)

(2) calculate the amount of moles (using the molarity equation)

It is important to arrange the conversions in a way that allows for the cancellation of units. The final answer should have 3 sig figs.

 125.0 mL NaOH                  1 L
---------------------------  x  ---------------------  =  0.1250 L NaOH
                                         1,000 mL

Molarity = moles / volume (L)                    <----- Molarity equation

0.190 M = moles / 0.1250 L                       <----- Insert values

0.0238 = moles                                         <----- Multiply both sides by 0.1250

The pOH of the 0.001 M NaOH solution is approximately 3.

To determine the pOH of a solution, we need to know the concentration of hydroxide ions (OH-) in the solution.

In the case of a 0.001 M NaOH solution, we can assume that all of the NaOH dissociates completely in water to form Na+ and OH- ions. Therefore, the concentration of hydroxide ions in the solution is also 0.001 M.

The pOH is calculated using the equation:

pOH = -log[OH-]

Substituting the concentration of hydroxide ions, we have:

pOH = -log(0.001)

Using a calculator, we can evaluate the logarithm:

pOH ≈ 3

Therefore, the pOH of the 0.001 M NaOH solution is approximately 3.

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The specific heat capacity of the metal can be calculated to be 2.03 J/g･ °C. This result can be explained by the fact that the heat lost by the metal is equal to the heat gained by the ethylene glycol, since no other source of heat is present.

Specific heat capacity is the amount of heat energy needed to raise the temperature of a unit mass of a substance by 1 degree Celsius. It is measured in joules per kilogram Kelvin (J/kg K).

The specific heat capacity (c) of the metal can be calculated using the following equation:

Q = mc∆T

Where Q is the heat lost by the metal, m is the mass of the metal, and ∆T is the change in temperature of the metal.

Q = (115.0 g)(c)(165.0 °C - 25.8 °C)

On the other hand, the heat gained by the ethylene glycol can be calculated using the following equation:

Q = (265.0 g)(2.43 J/g･ °C)(41.5 °C - 25.8 °C)

By equating the two equations, we can solve for the specific heat capacity of the metal:

(115.0 g)(c)(165.0 °C - 25.8 °C) = (265.0 g)(2.43 J/g･ °C)(41.5 °C - 25.8 °C)

c = 2.03 J/g･ °C

Therefore, the specific heat capacity of the metal can be calculated to be 2.03 J/g･ °C.

This result can be explained by the fact that the heat lost by the metal is equal to the heat gained by the ethylene glycol, since no other source of heat is present.

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The relative molecular mass of hydrated Copper (II) tetraoxosulphate (VI) CuSO4.5H₂O is 249.

Molecular mass is a measure of the total mass of one mole of a substance, which is defined as the mass of the substance divided by the number of molecules it contains. It is typically expressed in g/mol and is also known as molar mass. Molecular mass is determined by the types and number of atoms that compose a molecule, and is an important factor in understanding the properties of a substance.

This is calculated by adding the atomic masses of all the atoms present in the compound.
The atomic mass of copper is 64, sulphur is 32, oxygen is 16, and hydrogen is 1.
So, the relative molecular mass of hydrated Copper (II) tetraoxosulphate (VI) CuSO4.5H₂O is 64 + 32 + (16*4.5) + (1*5) = 249.

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Answer:

Hexane.

Explanation:

Hello!

In this case, since the general reaction of the compound C4H14 with chlorine is:

\(C_6H_{14}+Cl_2\rightarrow C_6H_{13}Cl+HCl\)

Which stands for a substitution chemical reaction in which one chlorine is able to replace one hydrogen and therefore hydrogen chloride gives off; we infer that the initial compound, C4H14, shows off the \(C_nH_{2n+2}\) formula characteristic of alkanes; in such a way, as it has six carbon atoms, we infer it is hexane.

Best regards!

The concentration of the dilute sulfuric acid is 0.047  mol dm-3.

We know that a neutralization reaction has to do with the kind of reaction that occurs between an acid and a base. The acid is made to react with the base and the product of the reaction would be salt and water only. We can now be able to find  the concentration of the dilute sulfuric acid in mol dm-3 form the procedure that have been laid down below.

Concentration of the base \(C_{B}\) =  0.100mol dm-3

Volume of the base \(V_{B}\)=  25.00cm^3

Concentration of the acid \(C_{A}\)  = ?

Volume of the acid \(V_{A}\) = 26.60cm^3

Number of moles of the acid \(N_{A}\) = 1

Number of moles of the base \(N_{B}\) = 2

Now;

\(C_{A}\) \(V_{A}\)/ \(C_{B}\) \(V_{B}\) =  \(N_{A}\)/ \(N_{B}\)

\(C_{A}\) = 0.100mol dm-3 *  25.00cm^3  * 1/26.60cm^3 * 2

\(C_{A}\) = 2.5/53.2

\(C_{A}\) = 0.047 M

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A solution containing a KCl dissolved in water will have a higher boiling point and a lower freezing point than that of pure water.

Elevation in boiling point is a phenomenon that describe the boiling point of a liquid will be higher when another compound is added. Which means a solution has higher boiling point than pure solvent .

Depression in freezing point is a phenomenon that describe the freezing point of a liquid will be lower when another compound is added. Which means a solution has lower freezing point than pure solvent.

Thus, The boiling point and the freezing point of a solution of KCl in water will be greater and lower, respectively, than that of pure water.

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From the given data, the name of the hydrated salt would be  \(CoCl_2.83H_2O\).

The formula of the hydrated salt can be determined using the empirical formula approach. That is, we will find the mole equivalent of the anhydrous salt and the water of hydration and then combine them into a single formula after dividing by the smallest mole.

First, we need to determine the mass of the anhydrous salt and the water of hydration.

Mass of crucible (x) = 12.090 g

Mass of hydrated salt + crucible (y) = 16.250 g

Thus, the mass of the hydrated salt can be determined by subtracting x from y.

Mass of hydrated salt = 16.250 - 12.090 = 4.16 g

Mass of hydrate + crucible after evaporating off the water (z) = 12.424 g

Mass of anhydrous salt = z - x

                                      = 12.424 - 12.090

                                      = 0.334 g

Mass of water = 4.16 - 0.334

                        = 3.826 g

Now, let's find the moles:

Molar mass of \(CoCl_2\) = 129.839 g/mol

Molar mass of water = 18.01 g/mol

Mole of \(CoCl_2\) = 0.334/129.839 = 0.00257 mol

Mole of water = 3.826/18.01 = 0.2124 mol

Dividing through by the smallest mole

\(CoCl_2\) =  0.00257 / 0.00257  = 1

water = 0.2124/ 0.00257 = 83

Thus, the formula of the hydrate would be \(CoCl_2.83H_2O\)

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Compounds are formed by the combination of atoms of different elements. Molecules are formed by atoms of same elements. Thus, N₂ is a molecule not a compound.

Compounds are formed by the combination of atoms of different elements. There are different kinds of compounds such as ionic compounds, covalent compounds.

For example, water, H₂O is a compound formed from two hydrogen atoms and oxygen atom. Similarly carbon dioxide or CO₂ is a covalent compound formed from two oxygens and one carbon atom. Methane or CH4 also is a compound.

N₂ is a molecule and not a compound. It is formed by the combination of two equivalent nitrogen atoms. Therefore, option C is correct.

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Answer:

electron

Explanation:

The products of the reaction as shown are silver chloride and potassium nitrate. option A

If we talk about a reaction we have to look at the kind of combination in which there is the mixture of two or more substance that can be able to interact in some ways and then give rise to a product that is different from the products that were combined.

Here in the case of what we have here there is the combination of the silver nitrate and the potassium chloride and the products of the double replacement reaction that we would get are the silver chloride and the potassium nitrate.

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A - Has no hydrogen bond since hydrogen is not bonded to an electronegative element

B - Has a hydrogen bond due to the N- H bond

C - Has a hydrogen bond due to the O - H bond

D - Has a hydrogen bond due to the H -I bond

In a hydrogen bond, a weak electrostatic connection is created when the positively charged hydrogen atom is drawn to the negatively charged electronegative atom.

This contact is stronger than van der Waals forces but not as strong as covalent or ionic bonds or other intermolecular forces.

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The percent by mass of nitrogen in ammonia (NH3) is approximately 82.15%

Calculating the mass of nitrogen to the total mass of the compound and then expressing the result as a percentage will allow us to determine the percent by mass of nitrogen in NH3 (ammonia).

Ammonia's molecular structure, NH3, indicates that it is made up of one nitrogen atom (N) and three hydrogen atoms (H). We must take both the molar masses of nitrogen and ammonia into account when calculating the percent by mass of nitrogen.

Nitrogen's (N) molar mass is roughly 14.01 g/mol. The molar masses of nitrogen and hydrogen are added to determine the molar mass of ammonia (NH3). Since hydrogen's molar mass is around 1.01 g/mol, ammonia's molar mass is:

(3 mol H 1.01 g/mol) + (1 mol N 14.01 g/mol) = 17.03 g/mol = NH3.

Now, we can use the following formula to get the nitrogen content of ammonia in percent by mass:

(Mass of nitrogen / Mass of ammonia) / 100% is the percentage of nitrogen by mass.

Ammonia weighs 17.03 g/mol and contains 14.01 g/mol of nitrogen by mass. By entering these values, we obtain:

(14.01 g/mol / 17.03 g/mol) 100% 82.15 % of nitrogen by mass

Ammonia (NH3) has a nitrogen content that is roughly 82.15 percent by mass.

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The percentage error of the measurement, given that the accepted measurement is 7.44 g/cm³, is 1.88%

First, we shall determine the absolut error. This can be obtained as follow:

Absolute error = accepted value - measured value

Absolute error = 7.44 - 7.30

Absolute error = 0.14 g/cm³

Haven obtained the absolute error, we shall determine the percentage error. Details below:

Percentage error = (Absolute error / accepted value) × 100

Percentage error = (0.14 / 7.44) × 100

Percentage error = 1.88%

Thus, we can conclude that the percentage error is 1.88%

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To calculate the moles of H+ and OH-, you need to know the concentration of the solution in terms of its pH or pOH value.

When you get the pH of the solution, you can use this formula to calculate the concentration of H+ ions: [H+] = 10^(-pH)

Also, if you know the pOH of the solution, you can use this formula to calculate the concentration of OH- ions: [OH-] = 10^(-pOH)

Having determined the concentration of H+ and OH- ions, the molarity formula can be used to calculate the number of moles of each ion as follows: moles = concentration (in mol/L) x volume (in L)

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Taking into account the definition of enthalpy of a chemical reaction, 14.76 grams of carbon must be reacted to release 483.1 kJ of heat.

The enthalpy of a chemical reaction as the heat absorbed or released in a chemical reaction when it occurs at constant pressure. That is, the heat of reaction is the energy that is released or absorbed when chemicals are transformed into a chemical reaction.

The enthalpy is an extensive property, that is, it depends on the amount of matter present.

The balanced reaction is:

C (s) + 2 O₂ (g) → CO₂ (g)

The enthalpy reaction ∆H° has a value of -393.5 kJ/mol.

This equation indicates that when 1 mole of C reacts with 2 moles of O₂, 393.5 kJ of heat is released.

Then you can apply the following rule of three: if 393.5 kJ are released if 1 mol of C react, 483.1 kJ are released if how many moles of C react?

moles of C= (483.1 kJ× 1 mole of C) ÷393.5 kJ

moles of C= 1.23 moles

Being the molar mass of C 12 g/mole, the mass of C reacted as calculated as:

mass of C= 1.23 moles× 12 g/mole

mass of C= 14.76 grams

14.76 grams of carbon react.

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