what effect does acid have on the gelatinization of a starch paste

The temperature (in k) will be 126.509 K

Number of moles of Oxygen = 0.0938 mol

Pressure = 740 torr or 98658.6 Pa

Volume = 1.0 L or 0.001 m3

Temperature in K = ?

To find out the temperature (T) we use the ideal gas equation

    PV = nRT

As we have to find the temperature so rearrange the equation for T

    T = PV / nR

value of R = 8.314 J/mol.K

Put the values in the equation

   V = 98658.6 * 0.001 / 0.0938 * 8.314

   V = 0.000974 / 0.779853

   V = 98.6596 / 0.779853

   V = 126.509 K

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0.24 g of LiOH are needed to make 100 ml of a 0.1 m solution.

Lithium hydroxide (LiOH), commonly obtained by the reaction of lithium carbonate with lime, is used in making lithium salts (soaps) of stearic and other fatty acids; these soaps are widely used as thickeners in lubricating greases.

Lithium hydroxide is an inorganic compound with the formula LiOH. It can exist as anhydrous or hydrated, and both forms are white hygroscopic solids. They are soluble in water and slightly soluble in ethanol. Both are available commercially.

LiOH (Lithium hydroxide) is a base. It is because it releases OH– (hydroxide-ion) in water. According to theories, a substance that can accept a proton or donate electrons or react with acid is classified as a base. LiOH reacts with strong acid HCl that produce LiCl and water.

The molarity of LiOH is 0.1M

The given volume is,

M = W1 × 1000/m1 × V(ml)

m1 = molecular mass of LiOH = 24

putting the values in the previous equation,

0.1 = W1 × 1000/24 × 100

W1 = 0.1 × 24 ×100/1000

⇒ 0.24 grams of LiOH is required.

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Answer:

i think its the first one

Explanation:

im new to chemistry as while but im not completely sure.

Answer:

Just as the organs in an organ system work together to accomplish their task, so the different organ systems also cooperate to keep the body running. For example, the respiratory system and the circulatory system work closely together to deliver oxygen to cells and to get rid of the carbon dioxide the cells produce.

Explanation:

Answer:

Explanation:

1 billion carbon atoms = 10⁹ carbon atoms .

33% were burnt

67 % remained behind .

67 % of 10⁹ = 6.7 x 10⁸

6.02 x 10²³ atoms = 1 moles

6.7 x 10⁸ atoms = 6.7 x 10⁸ / 6.02 x 10²³

= 1.11 x 10⁻¹⁵ moles

The balanced equation for the neutralization of hydrochloric acid with aluminum hydroxide is, 3HCl(aq) + Al(OH)₃(s) → AlCl₃(aq) + 3H₂O(l).

The neutralization reaction between hydrochloric acid (HCl) and aluminum hydroxide (Al(OH)₃) can be represented by the following balanced chemical equation,

3HCl(aq) + Al(OH)₃(s) → AlCl₃(aq) + 3H₂O(l)

In this equation, the hydrochloric acid (HCl) is in the aqueous state (indicated by "(aq)"), meaning it is dissolved in water. The aluminum hydroxide (Al(OH)₃) is in the solid state (indicated by "(s)"). When the acid and base react, they form aluminum chloride (AlCl₃) in the aqueous state and water (H₂O) in the liquid state.

This reaction is an example of a neutralization reaction, where an acid and a base react to form a salt and water. The aluminum hydroxide acts as a base, as it can accept hydrogen ions (H+) from the acid, and neutralize the acid. The resulting solution will have a neutral pH, indicating that the acid has been neutralized.

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For a redox reaction to be spontaneous, the overall ΔEº' is: (a.) positive and transfer of electrons occurs from a molecule with lower affinity to one with higher affinity.

For a redox reaction to be spontaneous, the overall ΔEº' (standard reduction potential) must be positive. The standard reduction potential measures the tendency of a species to gain electrons and undergo reduction.

In a redox reaction, electrons are transferred from one molecule or species to another. The molecule or species that gains electrons is reduced, while the molecule or species that loses electrons is oxidized.

In a spontaneous redox reaction, the species with a lower affinity for electrons (lower reduction potential) will donate electrons, and the species with a higher affinity for electrons (higher reduction potential) will accept those electrons. This transfer of electrons occurs from a molecule with lower affinity to one with higher affinity.

The positive value of ΔEº' indicates that the overall reaction is thermodynamically favorable, meaning it will proceed spontaneously in the direction of electron transfer from the molecule with lower affinity to the one with higher affinity.

Based on this information, the correct answer is:

a. positive and transfer of electrons occurs from a molecule with lower affinity to one with higher affinity.

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Answer:

This question lacks options, the options are;

A. Absorption of heat

B. A chemical change

C. A physical change

D. Formation of a new compound

The answer is C. A physical change

Explanation:

A physical change is a type of change that does not involve the chemical composition of the substance(s) involved. Physical changes affect the form but not the chemical content of a substance. Examples of physical changes are freezing, change of state, boiling etc.

In this question, a liquid is cooled during an investigation causing it to solidify. The cooling of this liquid represents a PHYSICAL CHANGE because the liquid state of the substance is only changed to a solid state but does not involve changing the chemical composition of the substance.

A liquid is cooled during an investigation physical change causing it to solidify.

Physical change occurs whenever there is difference in the appearance of any object observed.

In the question it is given that during an investigation a liquid is cooled down which results in the solidification of that liquid. During that change state of material changes from liquid state to the solid state, which is an example of a physical change.

Hence, in the question physical change occurs.

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Answer:

(CH3COO)2 + redP + Cl2 → ClCH2COOH + HCl

Explanation:

This is an example of halogenation of carboxylic acids at alpha carbon atom. In this reaction, red phosphorus and chlorine are treated with carboxylic acids having alpha hydrogen atom followed by hydrolysis to form alpha chloro carboxylic acid.

The measuring of shallow groundwater levels is one method that might be used as a proxy for deeper groundwater.

Deeper groundwater systems' behavior and characteristics can be better understood by studying shallow groundwater levels. Researchers can predict future changes or trends in deeper groundwater supplies by tracking and examining variations in shallow groundwater levels over time.

Analysis of the isotopic composition of surface water or precipitation is another method for gaining information about deeper groundwater. When groundwater is present or is moving from deeper sources, several isotopic signatures can be used to detect it.

It's important to note that while these proxies can provide useful information, they are not a direct measurement of deeper groundwater.  

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1 nonbonding electron pairs are in an ammonia molecule.

N has 5 electrons in its valence shell

3 electrons are being used to bond with Hydrogens

2 are left

therefore, there is 1 electron pair

A chemical bond is a lasting enchantment between atoms or ions that allows the formation of molecules and crystals. The bond might also result from the electrostatic pressure between oppositely charged ions as in ionic bonds, or through the sharing of electrons as in covalent bonds.

There are 3 primary varieties of bonding: ionic, covalent, and metallic. Ionic bonding. Definition: An ionic bond is shaped whilst valence electrons are transferred from one atom to the alternative to finish the outer electron shell.

The bond between hydrogen and oxygen atoms to form water is an instance of a covalent bond.

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The kinetic data is essential to determine the magnitude of the first-order rate constant. To do this, we can use the integrated rate law equation for first-order reactions, which is:

ln [A]t = -kt + ln [A]0

where [A]t is the concentration of reactant at time t, [A]0 is the initial concentration of reactant, k is the rate constant, and t is time.

Using the given reaction and the kinetic data, we can plot ln [SO2Cl2] versus time and determine the slope of the line. The slope of the line will be equal to -k, which will give us the magnitude of the first-order rate constant.

Let's assume that the initial concentration of SO2Cl2 is 0.05 M. Then, the table of data can be used to calculate ln [SO2Cl2] for each time interval. For example, at 10 minutes, [SO2Cl2] = 0.031 M, and ln [SO2Cl2] = -3.471.

Time (min) [SO2Cl2] (M) ln [SO2Cl2]

0 0.05 -2.996
10 0.031 -3.471
20 0.019 -3.957
30 0.012 -4.415
40 0.008 -4.828

Plotting ln [SO2Cl2] versus time gives us a straight line, as expected for a first-order reaction. The slope of the line is -0.177 min^-1, which is equal to the magnitude of the first-order rate constant (k).

Therefore, the magnitude of the first-order rate constant for the given reaction is 0.177 min^-1.
Hi! Based on the given data, we can determine the magnitude of the first order rate constant for the reaction:

SO2Cl2 (g) → SO2 (g) + Cl2 (g)

For a first order reaction, the rate law can be expressed as:

rate = k [SO2Cl2]

Unfortunately, the kinetic data required to calculate the rate constant (k) was not provided in your question. Please provide the necessary data, such as concentration changes and time intervals, so I can help you find the magnitude of the first order rate constant.

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The molecular formula of the unknown compound is C2H2O2.

To determine the molecular formula of the unknown compound, we need to calculate the empirical formula first and then find the multiple of its subscripts to obtain the molecular formula.

Given:

Percentage of carbon = 40.0%

Percentage of hydrogen = 6.7%

Percentage of oxygen = 53.3%

Molecular mass = 60.0 g/mol

Step 1: Convert the percentages to grams.

Assuming we have 100 grams of the compound:

Mass of carbon = 40.0 g

Mass of hydrogen = 6.7 g

Mass of oxygen = 53.3 g

Step 2: Convert the masses to moles using the molar masses of the elements.

Molar mass of carbon = 12.01 g/mol

Molar mass of hydrogen = 1.008 g/mol

Molar mass of oxygen = 16.00 g/mol

Number of moles of carbon = Mass of carbon / Molar mass of carbon

= 40.0 g / 12.01 g/mol

= 3.332 mol

Number of moles of hydrogen = Mass of hydrogen / Molar mass of hydrogen

= 6.7 g / 1.008 g/mol

= 6.648 mol

Number of moles of oxygen = Mass of oxygen / Molar mass of oxygen

= 53.3 g / 16.00 g/mol

= 3.331 mol

Step 3: Determine the empirical formula by dividing the moles by the smallest value.

Dividing the moles of carbon, hydrogen, and oxygen by 3.331 gives approximately 1 for each element.

So, the empirical formula of the compound is CHO.

Step 4: Determine the multiple of the subscripts to obtain the molecular formula.

To find the multiple, we divide the molecular mass by the empirical formula mass.

Molecular mass = 60.0 g/mol

Empirical formula mass = (12.01 g/mol) + (1.008 g/mol) + (16.00 g/mol) = 29.018 g/mol

Multiple = Molecular mass / Empirical formula mass

= 60.0 g/mol / 29.018 g/mol

= 2.07

Rounding to the nearest whole number, we get 2.

Therefore, the molecular formula of the unknown compound is C2H2O2.

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Answer:

A mixture is the blending of two or more dissimilar substances. A major characteristic of mixtures is that the materials do not chemically combine. Mixtures can be divided into those that are evenly distributed (homogeneous) and those that aren't (heterogeneous).

Explanation:

The question is incomplete, the complete question is;

Which area of chemistry best links the use of titanium and plastics in artificial bone and joint replacements? A) environmental chemistry

B) materials chemistry

C) agricultural chemistry

D) physical chemistry

Answer:

materials chemistry

Explanation:

Chemistry is the study of the nature of matter as well as the interaction between the particles that compose matter.

There are several branches of chemistry such as;

Physical chemistry

Organic chemistry

Biochemistry

Polymer chemistry and so on.

Materials chemistry is that branch of chemistry that deals with the design and production of diverse materials which can be used for various purposes.

Hence, the area of chemistry which best links the use of titanium and plastics in artificial bone and joint replacements is materials chemistry.

Answer:

B

Explanation:

took the test

Answer:

Vinegar consists of acetic acid (CH3COOH), water and trace amounts of other chemicals, which may include flavorings. The concentration of the acetic acid is variable. Distilled vinegar contains 5-8% acetic acid. Spirit of vinegar is a stronger form of vinegar that contains 5-20% acetic acid.Jun 4, 2019

Explanation:does this answer your question?

Exergonic: Reactions with negative delta G°’ values are exergonic reactions that release free energy.Exergonic means that the reaction will occur spontaneously. The value of delta G°’ is less than zero.

Endergonic: When the delta G°’ value is positive, the reaction is endergonic. These are reactions that need to be powered by an external force to occur.

At equilibrium: When delta G°’ = 0, the reaction is at equilibrium. The forward and reverse reactions occur at the same rate, and the concentrations of reactants and products do not change. Thus, the reaction is at equilibrium.

Here is how the K’eq values should be matched with the appropriate delta G°’ values:

K'eq  a. 1 : 0kJ/mol  b. 10⁻⁵ : 22.84 kJ/mol c. 10⁴ : -28.53 kJ/mol  d. 10² : -5.69 kJ/mol  e. 10⁻¹ : 11.42 kJ/mol AG°' (kJ/mol)

Therefore, the correct match for K’eq values with the appropriate delta G°’ values are as follows:

K'eq = 10⁴ corresponds to delta G°’ = -28.53 kJ/mol, which is exergonic.

K'eq = 10⁻⁵ corresponds to delta G°’ = 22.84 kJ/mol, which is endergonic.

K'eq = 10² corresponds to delta G°’ = -5.69 kJ/mol, which is exergonic.

K'eq = 1 corresponds to delta G°’ = 0 kJ/mol, which is at equilibrium.

K'eq = 10⁻¹ corresponds to delta G°’ = 11.42 kJ/mol, which is endergonic.

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Answer: 40.3

Explanation:

In the reaction, we see that for every 3 moles of oxygen gas consumed, 2 moles of rust are formed.

So this means that if 60.5 moles of oxygen gas are consumed, then (60.5/3)(2)=40.3 moles of rust can be formed.

Answer:

ok so basicalkly he lloked at how the subdiction zone formed and where previus conintal drift occured

Explanation:

Answer:

The products are Calcium oxide and Carbon dioxide.

Explanation:

When calcium carbonate is heated, thermal decomposition occurs.

Calcium calcium → Calcium oxide + Carbon dioxide

The glucose test strip used to test urine for the presence of glucose is based on the principle of glucose oxidase reaction.

This reaction involves the use of an enzyme called glucose oxidase, which catalyzes the conversion of glucose to gluconic acid and hydrogen peroxide. The test strip contains a reagent that reacts with the hydrogen peroxide produced in the reaction, causing a change in color. The intensity of the color change is proportional to the amount of glucose present in the urine sample. This provides a simple and convenient method for the detection of glucose in urine, which is often used as a screening test for diabetes.

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Explanation:

First find the mass of 1 mole of water (Molecular mass)

\( H_{2} O = 2H + O \)

\(

= 2(1) + 32 \)

\(

= 34 \: grams

\)

Hence 1 mole of water is 34 g

Compare

1 mole = 34 g

1.33 mole = x g

\( \frac{x}{34} = \frac{1.33}{1} \)

\(

x = 1.33 \times 34 \)

\(

\color{blue}{\boxed{x = 45.2}} \: \: \: \: to \: 3 \: s.f.

\)

Therefore 1.33 moles of water is 45.2 grams

The mass of the substances can be given by the molar mass and the moles of the substances. The mass of 1.33 mole of water is expressed in grams as, 23.94 grams.

The mass has been defined as the product of the moles of the substance and the molar mass in grams per mole. The mass is given in grams and has a formula,

Moles = mass ÷ molar mass

Mass = molar mass × moles

Given,

Moles = 1.33 moles

Molar mass of water (H₂O) is calculated as = 2 (1) + 16= 18 grams per mole

Using the formula of mole, mass is calculated as:

Mass = molar mass × moles

mass = 1.33 × 18

= 23.94 grams

The mass of the substance can be calculated if the value of the molar mass and the moles of the substance has been known. The molar mass of the substance can be calculated by adding the mass of the individual masses of the element in a molecule.

Therefore, 1.33 mol of water contains 23.94 grams.

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The IUPAC name for CH3-CH2-CH2-SH is 1-propanethiol. The IUPAC system of nomenclature is used to name organic compounds based on their structural formula. In this case, the compound has three carbon atoms in a continuous chain, which is called a propane chain. The suffix "-thiol" indicates the presence of a sulfhydryl group (-SH) attached to the first carbon atom of the propane chain. Therefore, the correct IUPAC name for this compound is 1-propanethiol. The other options given in the question are incorrect because they either have the wrong number of carbon atoms in the chain or the wrong position of the sulfhydryl group.

In conclusion, the IUPAC name for CH3-CH2-CH2-SH is 1-propanethiol. This name is derived from the three-carbon propane chain and the presence of a sulfhydryl group (-SH) attached to the first carbon atom, which is indicated by the suffix "-thiol". The other options given in the question are incorrect because they do not follow the IUPAC rules for naming organic compounds.

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A high temperature would favor the reactants in this reaction.

A high temperature would favor the reactants in this exothermic reaction. This is because, according to Le Chatelier's Principle, if a system at equilibrium is subjected to a change in temperature, pressure, or concentration of one of the components, the system will shift its equilibrium position in a way that tends to counteract the change.

In the case of an exothermic reaction, increasing the temperature will shift the equilibrium to favor the reactants in order to absorb the excess heat and return to equilibrium. Therefore, a high temperature would favor the reactants in this reaction.

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Consumption of a synthetic material being increased, leads to an associated negative impacts to Earth required to produce it is a True statement.

There are the materials which are made by humans through chemical synthesis which are usually done in factories.

The production of this type of materials leads to the emission of chemicals and other gases which are harmful and negatively impacts the environment.

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Answer:

D

Explanation:

In this closed rigid system, the partial pressure exerted by the neon gas is 1.6 atm.

To find the partial pressure exerted by the neon gas in a closed rigid system containing 7.0 mol CO₂, 7.0 mol Ar, 7.0 mol N₂, and 4.0 mol Ne, with a total pressure of 10.0 atm, we'll use Dalton's Law of Partial Pressures.

Step 1: Calculate the total number of moles of all gases present.
Total moles = moles of CO₂ + moles of Ar + moles of N₂ + moles of Ne
Total moles = 7.0 + 7.0 + 7.0 + 4.0
Total moles = 25.0 moles

Step 2: Determine the mole fraction of neon gas.
Mole fraction of Ne = moles of Ne / total moles
Mole fraction of Ne = 4.0 / 25.0
Mole fraction of Ne = 0.16

Step 3: Calculate the partial pressure of neon gas.
Partial pressure of Ne = mole fraction of Ne * total pressure
Partial pressure of Ne = 0.16 * 10.0 atm
Partial pressure of Ne = 1.6 atm

In this closed rigid system, the partial pressure exerted by the neon gas is 1.6 atm.

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