both beakers below contain pure water. the beaker on the left contains 500 ml of water, and the beaker on the right contains 200 ml of water: beaker with 500 ml water beaker with 200 ml water the specific heat of the water in the beaker on the left is the specific heat of the water in the beaker on the right.

Verify that the number of atoms of each element is equal on both sides of the equation and, if the equation contains ions, that the charges are balanced equation.

The number and type of each atom in balanced chemical equations are the same on both sides of the equation. The simplest whole number ratio must be used as the coefficients in a balanced equation. In chemical processes, mass is always preserved.

Each element must have the same number of atoms on the left as it has on the right. You must add integers to the left of one or more equations to balance an imbalanced equation.

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Exothermic A reaction releases 180 J The combustion of wood provides energy and Endothermic The energy level of the reactants is lower than that of the products.

Energy travels into or out of the environment during a chemical process. When energy is transferred to the environment, the resulting increase in temperature is known as an exothermic reaction. An illustration of an exothermic is combustion. many oxidation procedures. Endothermic refers to any chemical reaction that absorbs heat from the environment. The energy that had been absorbed provides the activation energy for the process. This type of reaction is distinguished by its cold feeling.

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Answer:

1.45 is larger for density

Answer:

CO2; succinyl-SCoA

Explanation:

Citric acid cycle, also called Krebs cycle is the second stage of aerobic cellular respiration, which occurs in the mitochondrion. The kreb's cycle is made up of 7 distinct steps, with each involving series of enzymatic reactions.

According to this question, step 3 and 4 of the citric acid cycle involves an oxidation and decarboxylation reaction to produce 2 molecules of carbon dioxide (CO2) and a 4-carbon compound called succinyl group. A coenzyme A binds to the succinyl group to form succinyl-SCoA.

The mass of lithium required to react with 4.96 g of bromine is 0.372 g. The number of moles of each reactant is 0.062. Therefore the percentage composition of each element in the product is 50%.

The percentage composition of a compound is the weight percentage of each element present in the compound contributing to the total weight of the compound.

The reaction between lithium and bromine gas is given below:

\(\rm Br_{2} + 2 Li \rightarrow 2LiBr\)

As per this reaction one mole bromine gas reacts with 2 moles of Li.

mass of Br₂ = 160 g/mol

mass of Li = 6 g/mol

for 2 Li = 12 g/mol

160 g of Br reacts with 12 g of Li. Thus, mass of Li required by 4.96 g of bromine gas is:

4.96 × 12 / 160 = 0.372 g.

The number of moles of Br = 4.96/ 80 = 0.062

no. of moles of Li = 0.372 / 6 = 0.062

The number of moles of each element is equal and hence, the percentage composition is 50 % each of Li and Br.

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Bromine makes up 92.1% of the compound, while the remaining 7.9% is made up of lithium.

Percent composition is a way of expressing the proportion of each element in a compound as a percentage of the total weight of the compound.

To find the percent composition of an element in a compound, divide the weight of the element in the compound by the total weight of the compound, and then multiply by 100%.

In this case, the weight of bromine in the compound is 4.96 g, and the total weight of the compound is 5.39 g. Therefore, the percent composition of bromine in the compound is:

\((4.96 g / 5.39 g) * 100% = 92.1%\)

This means that bromine makes up 92.1% of the compound, while the remaining 7.9% is made up of lithium.

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The statements about ion concentrations at rest that are true are:

At rest, there is a higher concentration of potassium ions on the inside of the cell and a higher concentration of sodium ions on the outside of the cell. This is due to the action of the sodium-potassium pump, which actively transports sodium ions out of the cell and potassium ions into the cell. This creates a difference in ion concentrations across the cell membrane, which is important for maintaining the resting membrane potential of the cell.

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Answer:

Reaction

Explanation:

A reaction that is spontaneous at low temperature

The correct option is D. 2) Anti-bonding electrons or lone pairs. These lone pairs, and bonds helps to form the shape which keeps these electrons separate as possible.

A system's equilibrium will move to the right, or toward the side of the products, in accordance with Le Chatelier's principle, if more reactants are added. ... The equilibrium will move to the left if we add more product to a system, producing more reactants.

Solution: By increasing the number of reactants, the equilibrium moves to the right and in the direction of the products.

Thus, if a reactant is added, equilibrium shifts to the right, away from the reactant. Equilibrium shifts to the left, away from the product, when a product is added. If we take away the product, equilibrium returns and produces the product. Reactant is created if reactant is removed, breaking the equilibrium.

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Answer:

Critical thinking initiates the act of hypothesis.

Critital thinking initiates the hypothesis. By thinking you will come across a question you want to answer. In the conculsion crititcal thinking is used again to validate the hypothesis.

We need to understand that reactions can happen at different speeds depending on the conditions to develop methods for production improvement.

The rate of any chemical reaction depends upon the nature of the reacting substances.  Under the same conditions , reactions that appear similar have different rates of reaction. Chemical reaction proceeds in different speeds, depend on the various factors such as type of chemical transformation , temperature and other factors. the information about the speed of reaction is useful in large scale production.

Thus, We need to understand that reactions can happen at different speeds depending on the conditions to develop methods for production improvement.

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Answer:

i think c

Explanation:

Answer:

Average atomic mass  = 32 amu

Explanation:

Given data:

Abundance of X-30.00 amu = 30%

Abundance of X-32.00 amu = 50%

Abundance of X-35.00 amu = 20%

Average atomic mass = ?

Solution:

Average atomic mass  = (abundance of 1st isotope × its atomic mass) +(abundance of 2nd isotope × its atomic mass)  +(abundance of 3rd isotope × its atomic mass)  / 100

Average atomic mass  = (30×30)+(50×32)+(20×35) /100

Average atomic mass =  900 + 1600 +700 / 100

Average atomic mass = 3200 / 100

Average atomic mass  = 32 amu.

Answer:

Explanation:

The temperature, pressure, and volume are not necessarily the same for each component of a mixture of nitrogen and oxygen stored in a tank. This is because gases have the ability to mix homogeneously and behave independently of each other, and their properties depend on their individual characteristics.

The pressure of a mixture of gases is determined by the total number of gas molecules in the container, while the temperature and volume of the gas mixture are determined by the average kinetic energy and the amount of space available for the gas molecules to move, respectively.

Therefore, it is possible for the temperature, pressure, and volume of nitrogen and oxygen to differ in a mixture, as they may have different molecular weights and exhibit different behaviors under certain conditions.

Overall, the properties of the mixture will depend on the individual properties and quantities of the components in the tank.

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Answer:

\(\large \boxed{1.615 \times 10^{25}\text{ molecules water}}\)

Explanation:

You must calculate the mass of the water, convert it to moles, and then calculate the number of molecules.

1. Mass of water

\(\text{Mass } = \text{499.8 mL} \times \dfrac{\text{0.967 g}}{\text{1 mL}} = \text{483.3 g}\)

2. Moles of water

\(\text{Moles of water} = \text{483.3 g water} \times \dfrac{\text{1 mol water}}{\text{18.02 g water}} = \text{26.82 mol water}\)

3. Molecules of water

\(\text{No. of molecules} = \text{26.82 mol water} \times \dfrac{6.022 \times 10^{23}\text{ molecules water}}{\text{1 mol water}}\\\\= \mathbf{1.615 \times 10^{25}}\textbf{ molecules water}\\\text{The sample contains $\large \boxed{\mathbf{1.615 \times 10^{25}}\textbf{ molecules water}}$}\)

The number of molecules of water  present in the bottle is 1.62×10²⁵ molecules.

We'll begin by calculating the mass of the water in the bottle.

Mass = Density × Volume

Mass of water = 0.967 × 499.8

Mass of water = 483.3066 g

Finally, we shall determine number of molecules of water in the bottle.

From Avogadro's hypothesis,

1 mole of water = 6.02×10²³ molecules

But,

1 mole of water = 18 g

Thus, we can say that:

18 g of water = 6.02×10²³ molecules

Therefore,

483.3066 g of water = (483.3066 × 6.02×10²³) / 18

483.3066 g of water = 1.62×10²⁵ molecules

Thus, the number of molecules of water in the bottle is 1.62×10²⁵ molecules.

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In the alpha helical conformation, all of the side chains lie outward from the helix, while the alpha carbon is located at the center of the helix.

This allows for optimal hydrogen bonding between the carbonyl group of one amino acid and the amide group of the next amino acid in the helix, resulting in the stable and compact helical structure.

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The percentage composition of this compound : 40%Ca, 12%C and 48%O

Given

20.0 g of calcium,

6.0 g of carbon,

and 24.0 g of oxygen.

Required

The percentage composition

Solution

Total mass of compound :

=mass calcium + mass carbon + mass oxygen

=20 g + 6 g + 24 g

=50 g

Percentage composition :

\(\tt \dfrac{20}{50}\times 100\%=40\%\)

\(\tt \dfrac{6}{50}\times 100\%=12\%\)

\(\tt \dfrac{24}{50}\times 100\%=48\%\)

Answer:

The government :) lol

Explanation:

Water is h2O, a clear, colorless, odorless, tasteless liquid that freezes into ice below 0 degrees centigrade and boils above 100 degrees centigrade.

\( \)

Water is called a ‘universal solvent' because water can dissolve much more substances than any other liquid found in nature but water cannot dissolve every substance.

Water is referred to as a "universal solvent" because it has a considerably wider range of natural solvent properties than any other liquid. However, water is not capable of dissolving all compounds.

For instance, water cannot dissolve hydroxides, fats, or waxes because oppositely charged particles are not very soluble in water. Hydrogen and oxygen atoms are arranged polarly in water molecules.

The oxygen atom has a negative charge, while the hydrogen atom on one side has a positive charge.The water molecule can more easily attach to various compounds thanks to these charges.

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Because it can dissolve a greater variety of chemicals than any other natural liquid, water is referred to as a "universal solvent," though it does not dissolve all substances. The option  C is true.

In comparison to other liquids, water has a much larger spectrum of natural solvent qualities, earning it the moniker "universal solvent". Nevertheless, not all substances can be dissolved by water.

Because water is not highly soluble in oppositely charged particles, it cannot dissolve hydroxides, fats, or waxes, for example. Water molecules have polar arrangements of the hydrogen and oxygen atoms.

In contrast to the hydrogen atom on one side, which has a positive charge, the oxygen atom has a negative charge.

These charges allow the water molecule to more readily bind to different substances.

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The concentration of volatile suspended solids (Xv) in the lagoon to assess the effluent quality. However, the specific aerator capacity needed cannot be determined without additional information or equations.

To determine if the industry will likely meet the desired effluent quality, we can calculate the BODL concentration in the aerated lagoon and the concentration of volatile suspended solids (Xv) in the lagoon.

BODL concentration in the aerated lagoon:

The BODL concentration in the lagoon can be calculated using the equation:

BODL_lagoon = BODL_influent - q * Xv * θ

where BODL_influent is the initial BODL concentration (2,000 mg/l), q is the specific oxygen utilization rate (27 mgBODL/mgVSSa-d), Xv is the concentration of volatile suspended solids (to be determined), and θ is the hydraulic retention time (1 day).

Concentration of volatile suspended solids (Xv) in the lagoon:

The concentration of volatile suspended solids can be calculated using the equation:

Xv = BODL_influent / (q * θ)

where BODL_influent is the initial BODL concentration (2,000 mg/l), q is the specific oxygen utilization rate (27 mgBODL/mgVSSa-d), and θ is the hydraulic retention time (1 day).

By substituting the given values into the equations, we can calculate the BODL concentration in the lagoon and the concentration of volatile suspended solids.

Regarding the aerator capacity needed, the question asks for the amount of aerator capacity in kW/1,000 m3 of tank volume. To calculate this, we need the field oxygen transfer efficiency (1 kgO2/kWh). However, the equation or method to determine the aerator capacity based on the given information is not provided. Without additional information or equations, it is not possible to calculate the specific aerator capacity needed in this scenario.

In summary, we can calculate the BODL concentration in the aerated lagoon and the concentration of volatile suspended solids (Xv) in the lagoon to assess the effluent quality. However, the specific aerator capacity needed cannot be determined without additional information or equations.

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Answer:

Youngest - limestone with crinoid

2nd - shale with ammonite

3rd -  sandstone with trilobite

oldest - conglomerate rock

Explanation:

Answer:

(1) Acid -------------------------------------> (G) When dissolved in water, its solution has a pH value less than 7. Acids are proton (H⁺ ion) donors.

(2) Alkali -----------------------------------> (E) The oxide, hydroxide, or carbonate of a metal that will react with an acid, forming a salt as one of the products (if a base dissolves in water it is called an alkali. Bases are proton (H⁺ ion) acceptors.

(3) Base ------------------------------------> (I) Its solution has a pH value of more than 7.

(4) Blast furnace ------------------------> (C) The huge reaction vessels used in industry to extract iron from its ore.

(5) Displacement reaction ----------> (R) A reaction in which a more reactive element takes the place of a less reactive element in one of its compounds or in solution.

(6) Mole -----------------------------------> (A) A very large number that is the amount of substance in the relative atomic or formula mass of a substance.

(7) Neutral -------------------------------> (J) A solution with a pH value of 7 which is neither acidic nor alkaline. Alternatively, something that carries no overall charge.

(8) Neutralization ----------------------> (F) The chemical reaction of an acid with a base in which a salt and water are formed. If the base is a carbonate of hydrogen carbonate, carbon dioxide is also produced in the reaction.

(9) Ore -------------------------------------> (P) Ore is rock which contains enough metal to make it economically worthwhile to extract the metal.

(10) Oxidation --------------------------> (B) A reaction where oxygen is added to a substance / or when electrons are lost from a substance.

(11) pH -------------------------------------> (O) A number which shows how strongly acidic or alkaline a solution is.

(12) Pipette ------------------------------> (N) A glass tube used to measure accurate volumes of liquids.

(13) Precipitate -------------------------> (K) An insoluble solid formed by a reaction taking place in solution.

(14) Reactant ---------------------------> (M) A substance we start with before a chemical reaction takes place.

(15) Reduction -------------------------> (S) A reaction in which oxygen is removed or electrons are gained.

(16) Salt ----------------------------------> (Q) A salt is a compound formed when some or all of the hydrogen in an acid is replaced by a metal.

(17) Strong acids ---------------------> (L) These acids completely ionize in solution and have a high concentration of H⁺ (aq) ions in solution.

(18) Universal indicator ------------> (H) A mixture of indicators that can change through a range of colors to show how strongly acidic or alkaline liquids and solutions are.

(19) Weak acids ---------------------->  (D) Acids that do not ionize completely in aqueous solutions.

Answer:

Explanation:

Here, we want to give a reason for why one of the reactions might not occur

Generally, a metal that is above another in the electrochemical series will displace it from its salt

Now, Aluminum is higher than copper, thus, it would displace it (from CuCl2, a reaction will occur). However, Aluminum is lower than magnesium. Thus, it will not displace it from its salt (MgCl2 and no reaction will occur)

The given chemical equation is unbalanced.

An unbalanced equation is a chemical equation that does not have the same number of atoms of each element on both sides of the equation. In other words, the number of atoms of each element present in the reactants (the substances being reacted) is not the same as the number of atoms of each element in the products (the substances produced by the reaction).

As one can see from the equation, there are more Sodium ( Na ) atoms on the left side of the equation than on the right side. The equation is therefore unbalanced.

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Answer:

1.605cm = 4 significant figures

16.050cm = 4 significant figures

16.050cm = 4 significant figures

12 + 12.5 + 125 = 149.5 = 4 significant figures

1.62 × 10^3/2.8 × 10^-5 = 1620/0.000028 = 11 significant figures

Answer:

5.14mole

Explanation:

Given parameters:

Mass of sodium bicarbonate  = 431.56g

Unknown:

Number of moles  = ?

Solution:

To find the number of moles, we use the expression below:

  Number of moles  = \(\frac{mass}{molar mass}\)  

 Molar mass = 84.01g/mol

 Number of moles  = \(\frac{431.56}{84.01}\)   = 5.14mole

(i) Silver iodide (AgI) precipitates first.

(ii) The molarity of Ag+ needs to be reduced below the solubility product constant of AgI.

(iii) The molarity of Ag+ needs to exceed the solubility product constant of AgSCN.

(i) According to the given solubility product constants, AgI has a smaller Ksp value compared to AgSCN. Therefore, AgI precipitates first when silver ions are added to the solution containing I- and SCN- ions.

(ii) To decrease the concentration of the first precipitated ion, AgI, to 1.0x10-10 M, the molarity of Ag+ needs to be reduced below the Ksp value of AgI. The specific molarity of Ag+ required can be calculated by using the Ksp value of AgI and the stoichiometry of the reaction.

(iii) To initiate the precipitation of the second ion, AgSCN, the molarity of Ag+ needs to exceed the Ksp value of AgSCN. Once the concentration of Ag+ exceeds the Ksp value of AgSCN, AgSCN will start to precipitate.

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Neutralization reaction would be best to determine which tablet, antacid a or antacid b, neutralizes stomach acid the quickest.

A salt and water are created when an acid and an alkali are balanced out. An example of this is a neutralization reaction. The names of the acid and alkali can be used to deduce the name of the salt that is created. A neutralization reaction can be represented by chemical equations.

In the stomach there is acid that is hydrochloric acid, when anta acid tablet that is  a base is added it get neutralized and acidity is relieved. But in order to check which antacid is good a and b in lab condition for equal amount of HCl when both tablet are used then how fast one neutralizes the acid, i.e., by studying the kinetics of the reaction one can determine the best tablet.

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