consider the following initial rate data (at 305 k) for the decomposition of a substrate (substrate 1) which decomposes to product 1 and product 2: [substrate 1] (m) initial rate (m/s) 0.1 0.753 0.2 0.753 0.5 0.753 determine the half-life for the decomposition of substrate 1 when the initial concentration of the substrate is 2.87 m.

To arrange the 0.10 M solutions of KCl, NH4Cl, HCl, CH3COONa (sodium acetate), and KOH in order of increasing pH, we have to follow these steps:

1. Identify the nature of each solution:
- KCl is a neutral salt (pH ≈ 7)
- NH4Cl is the salt of a weak base (ammonium ion) and a strong acid (hydrochloric acid), making it acidic (pH < 7)
- HCl is a strong acid (pH < 7)
- CH3COONa (sodium acetate) is the salt of a weak acid (acetic acid) and a strong base (sodium hydroxide), making it basic (pH > 7)
- KOH is a strong base (pH > 7)

2. Arranging the solutions in order of increasing pH:
- HCl (strong acid, lowest pH)
- NH4Cl (acidic salt)
- KCl (neutral salt)
- CH3COONa (sodium acetate, basic salt)
- KOH (strong base, highest pH)

So, the order of increasing pH is:  HCl< NH4Cl< KCl<CH3COONa(sodium acetate)<KOH.

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Answer:

i beleive iron

Explanation:

The percent composition of salicylic acid is C7H6O3, or 60.87%C, 4.4%H, and 34.75%O

Answer:

Explanation:

2 triangles and on square

The assumption that the aqueous activity of H4SiO4 is controlled by amorphous silicic acid (am-H4SiO4) rather than by quartz is based on the fact that am-H4SiO4 is more reactive and readily available for dissolution in soils than quartz.

This means that in soils, the concentration of dissolved H4SiO4 is more likely to be controlled by the dissolution of am-H4SiO4 rather than by quartz.

Additionally, the dissolution of quartz requires more energy than the dissolution of am-H4SiO4, making it a slower process.

Therefore, when evaluating the stability of soil silicates and aluminosilicates, the assumption is made that the aqueous activity of H4SiO4 is controlled by am-H4SiO4 rather than by quartz because am-H4SiO4 is more readily available and reactive in soils.

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Answer:

2.Diffusion

Explanation:

As we metabolize certain nutrients for the correct functioning of our cells, carbon dioxide is produced as a result. We need oxygen in order to metabolize them, so we need to have a system to incorporate it, and to eliminate the carbon dioxide produced.

This system is provided by the interaction between the respiratory system, which allows the enter of oxygen into the body and gets rid of the carbon dioxide, and the circulatory system, which acts transporting carbon dioxide and oxygen to and from the lungs, respectively.

The surface available for the gaseous exchange is enlarged by the pulmonary alveoli. The alveoli are the terminal aerial spaces of the respiratory system and the structures where the exchange between the air and blood is produced. Each alveolus is surrounded by a net of capillaries, where oxygen is freed from the hemoglobin and moves into the cells by diffusion. Carbon dioxide, diffuses out of the cells into the capillaries, where most of it dissolves in the plasma of the blood.

Since the ore is 31.1% nickel by mass, every 100 g of the ore contains 31.1 g of nickel. To have 70.0 g of nickel, we need  2.25 kg of the ore.

When we say that ore is 31.1% nickel by mass, we mean that 31.1 g of nickel is present in every 100 g of the ore. We can use this information to calculate the amount of ore needed to obtain a certain amount of nickel.

To find the amount of ore needed to get 70.0 g of nickel, we can divide the desired amount of nickel by the amount of nickel present in 100 g of the ore:

70.0 g / (31.1 g/100 g) = 70.0 g / 0.311 = 2.25 kg

So, we would need to dig up 2.25 kg of the ore to get 70.0 g of nickel.

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Pseudoscience is the field that asserts the explanation based on opinions and beliefs. It depends on subjective experiences to support assertions. Thus, option A is correct.

Pseudoscience is the establishment of the fact based on just the hypothesis without proper research and experiments. It contains unverified and inconsistent results.

They are subjective ideas that never change and are not proven scientifically. They lack evidence to support their ideas and unlike science are not objective.

Therefore, option A. pseudoscience is based on personal experiences and beliefs.

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Answer:

Rn has the most stable nucleus

Rn (Radon) has the most stable nuclei due to its closer proximity to the magic number 126.

Option (3) is correct.

The stability of a nucleus depends on the arrangement of protons and neutrons within it. Certain numbers of protons and neutrons result in more stable nuclei. These numbers are known as magic numbers, and they correspond to complete nuclear shells.

Among the given atoms:

Ra (Radium) has 88 protons and a varying number of neutrons.

Po (Polonium) has 84 protons and a varying number of neutrons.

Rn (Radon) has 86 protons and a varying number of neutrons.

Au (Gold) has 79 protons and a varying number of neutrons.

Radon (Rn) has the most stable nuclei because it is closer to the magic number 126 for neutrons. Elements with magic numbers of protons or neutrons tend to have more stable configurations, making Rn the most stable among the options provided.

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Answer:

(A) chlorine is an oxidizing agent in this reaction so it oxidize iodine and it itself is reduced

Explanation:

Cl2 oxi no. = 0 became Cl- oxi no. = -1

so it is reduced

I- oxi no. = -1 became I2 oxi no. = 0

so it oxidized

Egg whites are simply made frothy by adding air during the whipping process. It's a physical shift as they are still eggs whites—a material that has not changed. Yet in a chemical transformation.

To put it another way, a chemical always consists of the same "substance." There are some substances in nature, like water. Other chemicals, including chlorine, are produced

All of these things are made of chemicals, some organic and others manmade, including air, water, iron, fuel, clothes, stones, equipment, plastics, plants, and food. Chemicals can be made up of several distinct chemicals or they might be specific chemical molecule like water. Nitrogen, carbon, water, carbon dioxide, and other substances are all present in air.

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The physical state of water at the following temperatures are :

Answer:

The physical state of water at 125 °C will be gas.

The physical state of water at -24 °C  will be ice.

The physical state of water at 75 °C will be liquid.

The the physical state of water before zero degree celsius is solid.

At 0 it is solid and liquid both.

From 0 to 100 degree Celsius it is liquid.

At hundred degree it is liquid and gas both.

At 100 and above 100 it is gas..

Explanation:

True. They may both be properties of a gas but they are independent of each other since the pressure of a gas may vary without changing the temperature or volume (or any other properties).

Answer:

True

Explanation:

The statement "The qualities/quantities of a gas are independent of one another" is True. This means that a change in one property of a gas, such as pressure, volume, or temperature, does not affect the other properties. This is one of the basic assumptions of the ideal gas law, which states that the pressure, volume, and temperature of a gas are proportional to one another under certain conditions.

For example, when the volume of a gas is increased, its pressure decreases, and when its temperature is increased, its pressure also increases. These changes in properties are independent of one another, and can be described by the mathematical relationships described by the ideal gas law.

ALLEN

Answer:

It can be expressed in several ways: molarity (moles of solute per liter of solution); mole fraction, the ratio of the number of moles of solute to the total number of moles of substances present; mass percentage, the ratio of the mass of the solute to the mass of the solution times 100; parts per thousand (ppt), grams ...

Explanation:

It can be expressed in several ways: molarity (moles of solute per liter of solution); mole fraction, the ratio of the number of moles of solute to the total number of moles of substances present; mass percentage, the ratio of the mass of the solute to the mass of the solution times 100; parts per thousand (ppt), grams ...

Answer:

the shade/light is the independent variable

Explanation:

Answer:

the independent variable is the light and or shade.

Explanation:

because the light and the shade are going to both effect the growth.

and ive done this before haha well hope this helped

Minerals can be located using geochemical surveys and remote sensors that analyze satellite images. Following that, mining or quarrying is used to remove many minerals.

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The sources of chemical energy from the available options would be batteries and foods.

Chemical energy is a form of energy derived from the chemical properties of materials.

Most batteries contain chemicals that are able to ionize in solution to produce electric currents in circuits. Chemicals in batteries include sodium chloride, nitric acid, sulfuric acid, etc.

Foods contain chemicals that when hydrolyzed in the body, are able to produce energy to sustain the various processes in the body. The chemicals in foods are mostly carbohydrates.

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There are many possible combinations of these ions that will produce ionic compounds with a 1:1 ratio of cations and anions. Some examples include NaCl (sodium chloride), KBr (potassium bromide), and CaF2 (calcium fluoride).

A 1:1 ratio of cations to anions is called a balanced ratio. This occurs when there are equal numbers of positively and negatively charged particles in a solution. A balanced ratio is necessary for many chemical reactions to occur. When the ratio is not balanced, the reaction may not occur at all, or it may occur very slowly.+1,+2 valency of cations can combine with -1,-2 valency of anions to give 1:1 ratio of the ionic compounds.

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Balanced complete ionic equation for the acid-base reaction is

HCHO₂ (aq) + KOH(aq) → KCHO₂(aq) + H₂O(l)

Ionic equation is a chemical equation in which the electrolytes in aqueous solution are expressed as dissociated ions

Here given equation is

HCHO₂ (aq) + KOH(aq) →

Then we have to complete this equation to write the product then

HCHO₂ (aq) + KOH(aq) →  KCHO₂(aq) + H₂O(l)

Then break all the electrolyte into the ion

H⁺ + CHO₂⁻ + K⁺ + OH⁻→ K⁺ + CHO₂⁻ + H₂O

Then cancel the spectator ion on both side then

CHO₂⁻ and  K⁺

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Answer:

Explanation:

The energy flow in the form of heat is a consequence of a difference in temperatures. When two objects with different temperatures are put in contact, the energy will flow from the object with the highest temperature to the one with the lowest temperature.

In this case, the thermometer first had a temperature of 22ºC. Then it was placed in a beaker of water and it read 45ºC. Therefore, the temperature gained by the thermometer is a consequence of the transmission of heat from the water in the beaker, which was at a higher temperature.

Answer:

True

Explanation:

Because Carbon is the primary component of macromolecules, including proteins, lipids, nucleic acids, and carbohydrates.

Answer:

True!

Explanation:

All living things contain carbon in some form. Carbon is the primary component of macromolecules, including proteins, lipids, nucleic acids, and carbohydrates. Carbon's molecular structure allows it to bond in many different ways and with many different elements. So therefore, its true (:

Answer:

Option A

Explanation:

The total heat absorbed during the chemical reaction is the total heat released by the surrounding.

Net change of heat is equal to zero

Hence, the energy liberated from the air or the walls of the containers would be equal to the energy absorbed by the chemical reactions is equal to 100 Kj

Thus, option A is correct

The higher the boiling point lower will be the vapor pressure. Thus, the correct order of vapor pressure is \(H_{2}O\) < \(CHCL_{2}\) < \(CS_{2}\).

The boiling factor of a substance is the temperature at which the vapor strain of a liquid equals the stress surrounding the liquid and the liquid modifications right into a vapor. The boiling point of a liquid varies depending on the encompassing environmental stress.

The boiling point for any material is the temperature point at which the fabric transforms into the gas segment in the liquid phase. This happens at a hundred ranges centigrade for water. The boiling point of a pure substance is the temperature at which the substance transitions from a liquid to the gaseous segment. At this point, the vapor stress of the liquid is equal to the implemented stress of the liquid. The boiling point at a strain of 1 ecosystem is known as the regular boiling factor.

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The number of moles of AgCl formed in this reaction is also 0.0125 moles. This is because the reaction is a 1:1 stoichiometric ratio, which means that the amount of AgCl formed is directly proportional to the amount of AgNO3 that reacted.

The balanced chemical equation shows that for every 2 moles of AgNO3 that react, 2 moles of AgCl are formed.

Therefore, the number of moles of AgCl formed can be determined using stoichiometry based on the moles of AgNO3 that reacted. Since we determined in a previous step that 0.0125 moles of AgNO3 react, we can use this value in our stoichiometric calculation. From the balanced equation, we know that 2 moles of AgNO3 react with 2 moles of AgCl. This means that for every 2 moles of AgNO3 that react, 2 moles of AgCl are formed. Therefore, the number of moles of AgCl formed in this reaction is also 0.0125 moles. This is because the reaction is a 1:1 stoichiometric ratio, which means that the amount of AgCl formed is directly proportional to the amount of AgNO3 that reacted.

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Answer:

True

Explanation:

Limiting reagent is the reactant that determines the progress of the reaction. It determines how much of the product is formed.

The equation for this reaction is;

NaCl (aq) + NH4HCO3 (aq) → NaHCO3 (aq) + NH4Cl (aq)

From the reaction, 1 mol of NaCl reacts with 1 mol of NH4HCO3 to produce 1 mol of NaHCO3

Converting to masses using; Mass = Number of moles * Molar mass

58.44g of NaCl reacts with 79.056g of NH4HCO3

If we were to  sue the whole 1.2 g of NH4HCO3 we would require xg of NaCl

58.44 = 79.056

x = 1.2

x = 0.887g

The fact that 1.2g of NH4HCO3 requires 0.887g of NaCl (which is less than the available 0.75g) means that NaCl is the limiting reagent.

Copper(ii)nitrate reacts with sodium bromide to form Sodium nitrate and cupric bromide, but no precipitate is formed.

The reaction between Copper nitrate and sodium bromide is as follows.

   Cu(NO₃)₂ + NaBr  →  CuBr₂ + NaNO₃

Copper nitrate and sodium bromide react to form Cupric bromide and Sodium Nitrate. The products Cupric bromide and sodium sulfate are soluble in water. As a result, no precipitate is formed as a result of this reaction.

The reaction between copper nitrate and sodium bromide is an example of a double displacement reaction, which means the anions and cations of two ionic compounds interact and displace each other.  Precipitation formation only happens when insoluble products are obtained.

Here both the products are soluble in water, So no precipitate is formed during the reaction.

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