Which statement about chemical reaction rates is true?


A.The reaction rates cannot decrease.


B.The reaction rates cannot change.


C.The reaction rates can increase.


D.The reaction rates are always constant.

Answer:

See explanation

Explanation:

Electroplating is a method used to coat a metal on top of another metal for various purposes.

Additive plating involves the coverage of a metal surface by another metal. To make the coins, the suspects had to coat the required coinage metal on another metal called the base metal so as to produce the coin.

Hence the method used must be additive plating method.

Answer:

Explanation:

Answer:

The main difference between flowering and nonflowering plants is their method of reproduction. Flowering plants rely on pollination for reproduction, where as nonflowering plants rely on dispersion to continue their life cycle.

Answer:

The most common injury caused by working with machinery are cuts and burns.

Explanation:

Cuts and burns are the  most common injury caused by working with machines unsafely.

Any physiological harm to living tissue brought on by acute physical stress is referred to as an injury. An injury can be brought on by a blunt trauma, a piercing trauma, burning, exposure to chemicals, asphyxiation, or overexertion, and it can also happen accidentally. Any area of the body can become injured, and each injury has a unique set of symptoms.

Major injuries are normally treated by a medical practitioner, and the type of treatment depends considerably on the injury. The most frequent reason for accidental human injury or injury-related death is traffic crashes. Chronic conditions are different from injuries. Cuts and burns are the  most common injury caused by working with machines unsafely.

Therefore,  Cuts and burns are the  most common injury caused by working with machines unsafely.

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Answer:

Eating tomatoes is one of the best things you can do. These beautiful, red fruit not only

thrill your taste buds and brighten your plate, they help fight disease. Studies show that

people who eat tomatoes, and lots of them, lower their risks of cancer because

tomatoes contain lycopene, a powerful antioxidant. -Tomatoe Farmers of America.

A. Is the bias negative or positive

B. What words, phrases or sentences made the paragraph biased or not biased?

Answer:

Candy Tomatoes are a low calorie fruit that is high in fiber. Their sweet flavour is a result of the high sugar content, but is balanced by the nutrition and health benefits provided by vitamin C, potassium, lycopene, and antioxidants.

Explanation:

Yeah it is good for people who didn't like the taste of tomato.

Answer:

9, 10, 12

Explanation:

anything greater than pH 7 is basic

An atom becomes a positive ion, or cation, when it loses electrons. This loss of electrons makes the atom positively charged, as the number of protons in the nucleus exceeds the number of electrons surrounding the nucleus.

On the other hand, an atom becomes a negative ion, or anion, when it gains electrons. This gain of electrons makes the atom negatively charged, as the number of electrons surrounding the nucleus exceeds the number of protons in the nucleus.

The formation of ions can occur through various processes, such as chemical reactions, radiation, or heat. For example, in a chemical reaction, an atom can transfer electrons to or accept electrons from another atom, leading to the formation of positive and negative ions, respectively. Similarly, exposure to radiation or high heat can cause electrons to be stripped from atoms, leading to the formation of cations.

In summary, an atom becomes a positive ion by losing electrons and a negative ion by gaining electrons. The formation of ions can occur through chemical reactions, radiation, or heat.

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Answer:

Explanation:

Here, we want to calculate the initial volume of the container

Mathematically, we know that volume and pressure are inversely related. What this means is that as volume increases, pressure is expected to decrease and as pressure increases, volume is expected to decrease

A mathematical link between these two is as follows:

The above is according to Boyles' law.

The values with subscript 1 are the initial values, while the values with the subscript 2 are the final values

Thus:

V1 = ?

P1 = 1.25 atm

V2 = 1L

P2 = 3.75 atm

From the relation:

Answer:

Mass = 18.9 g

Explanation:

Given data:

Mass of Al₂O₃ formed = ?

Mass of Al = 10.0 g

Solution:

Chemical equation:

4Al + 3O₂      →       2Al₂O₃

Number of moles of Al:

Number of moles = mass/molar mass

Number of moles = 10.0 g/ 27 g/mol

Number of moles = 0.37 mol

Now we will compare the moles of Al and Al₂O₃.

                      Al          :          Al₂O₃

                       4           :            2

                     0.37        :         2/4×0.37 = 0.185 mol

Mass of Al₂O₃:

Mass = number of moles × molar mass

Mass = 0.185 mol × 101.9 g/mol

Mass = 18.9 g

Answer:

pH ≈ 4.21

The acidity of a solution can be expressed as:

pH = -log₁₀[H⁺] = -log₁₀[H₃O⁺]. Historically, pH is an acronym for "potential of Hydrogen". The scale goes from 1 to 14, where acidic solutions are measured to have lower pH values than basic or alkaline solutions. a pH of 7 represents a neutral solution. Pure distilled water has a pH of 7, whereas drinking water has a slightly greater pH than 7, due to the chemicals added to eliminate harmful bacteria.

Generally, in calculating pH, we use the formula: pH = -log₁₀[H⁺], where [H⁺] = concentration of hydrogen ions. However, sometimes the formula pH = -log₁₀[H₃O⁺] may also be used where [H3O+] = hydronium ion concentration. The hydronium ion is basically just the H⁺ ion released that bonds with the H₂O molecule to form H₃O⁺. The two above formulas can be used interchangeably.

To calculate the pH of a solution with [H₃O⁺] = 6.19×10⁻⁵ M:

pH = -log₁₀(6.19×10⁻⁵) ≈ 4.208

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Hydrogen ion concentration decreases and the pH value of the gastric juice Increases after ingesting this type of antacid.

The approximate pH value of gastric juice which is present in the human stomach is 1.5. Gastric juice contains Hydrochloric acid and this is necessary for the digestion process. If the hydrochloric acid amount is excess it may harm the stomach lining.

Mg(OH)2(s)  is the one type of antacid that is used to neutralize excess hydrochloric acid in the stomach. This neutralization of the hydrochloric acid by  Mg(OH)2(s)  antacid is represented by the incomplete equation below.

Mg(OH)2(s) + 2HCl(aq) --------> (aq) + 2H2O(l)

The Antacid helps to neutralize excess hydrochloric acid in the stomach by decreasing the Hydrogen ion concentration and the Increase in the pH value.

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Answer:

Deciduous forests

Explanation:

This atom can form up to 4 single covalent bond(s).

An atom's ability to form covalent bonds depends on its valence electrons, which are the electrons in the outermost energy level. Each covalent bond involves the sharing of a pair of electrons between two atoms.

In the case of an atom that can form up to 4 single covalent bonds, it means that the atom has 4 valence electrons available for bonding. By sharing these electrons with other atoms, the atom can complete its octet (or duet, in the case of hydrogen) and achieve a stable electron configuration.

This ability to form 4 single covalent bonds is typically observed in elements from Group 14 of the periodic table, also known as the carbon group. Carbon (C) is a well-known example of an atom that can form 4 covalent bonds. Other elements in this group, such as silicon (Si), germanium (Ge), and tin (Sn), also have the capability to form multiple covalent bonds.

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Answer:

1st group-alkali metals

7th group-halogen group

8th group- noble gas group

Answer:

4. Group 1 in periodic table is called alkali metals.

5. Group 7 in periodic table is called halogens.

6. Group 8 or 0 in periodic table is called noble gases.

Answer:

a) -1 to +2

Explanation:

Oxidation means electrons are lost, and thus oxidation number increases.

Answer:

Mutualism

Explanation:

i don’t think i know

The energy in the bonds in glucose will be broken down and transferred to ATP molecules.

Cellular respiration is the process by which living organisms obtain energy by breaking down food molecules in their cells.

The equation for cellular respiration is as follows:

C6H12O6 + 6O2 → 6CO2 + 6H2O + ATP

Based on the illustration using the above equation, the energy stored in the bonds of glucose molecule is broken down and used to synthesize ATP molecules.

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The atom with the electron configuration 1s²2s²2p⁶3s²3p⁶4s²3d⁷ is Co.

The electron configuration of an atom is the arrangement of the atom's electrons in its energy levels. Each element has a unique electron configuration that determines its properties and behavior.

In this case, the electron configuration given is 1s²2s²2p⁶3s²3p⁶4s²3d⁷. To find the element that corresponds to this configuration, we need to add up the number of electrons in each energy level.

Adding these up, we get a total of 27 electrons. The element with 27 electrons is Cobalt (Co), so that is the answer.

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The amount of landfill space saved by recycling paper products in 2010 in the United States is 2.31 times the total amount of MSW recycled in that year.

To calculate the amount of landfill space saved by recycling paper products in 2010 in the United States, we need to find out the number of paper products that were recycled. We can do that by using the data on the total MSW recycled and the percentage of that which was accounted for by paper products.

Percentage of total MSW recycled accounted for by paper products in 2010 = 33%

Amount of landfill space saved per metric ton of paper products recycled = 7 m³

We need to determine the amount of landfill space saved by recycling paper products in 2010 in the United States.

Therefore, Let's assume that the total amount of MSW recycled in 2010 was x metric tons. Then, the number of paper products recycled = 33% of x= (33/100) x metric tons = 0.33x metric tons

Therefore,

The amount of landfill space saved by recycling paper products in 2010 = Amount of paper products recycled × Landfill space saved per metric ton of paper products recycled= 0.33x metric tons × 7 m³/metric ton= 2.31x m³

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One way chemicals can help the environment is by using synthetic pesticides and fertilizers to increase crop yields while minimizing water usage. This helps to reduce the land area needed for farming, which in turn reduces deforestation. It also decreases the need to clear additional land for cultivation, which reduces greenhouse gas emissions and helps to prevent soil erosion. Additionally, some chemicals can be used to clean up contaminated soil and water sources, such as in the case of oil spills or industrial pollution.

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Answer:

The slight positive charges on the hydrogen atoms in a water molecule attract the slight negative charges on the oxygen atoms of other water molecules. This tiny force of attraction is called a hydrogen bond. This bond is very weak.

Explanation:

:)

After the fifth step, 32 nuclei will have been split.

A chain reaction is exponential, hence the following statement can be used to describe it: S stands for the number of steps,

N=(2)s.

Equation:

N= (2)²

N = 5^{2} is what we obtain when we express the number of nuclei after the fifth step and substitute the numbers.

Thus, the final answer is:

N = 32

When a neutron collides with a larger atom, it experiences fission, splitting into two smaller atoms known as fission products. Other neutrons that are released at the same time could initiate a chain reaction. Each atom's division releases a huge amount of energy.

Nuclear energy

Electricity can be produced using nuclear energy, but first the energy must be released from the atom.

Nuclear fission is a process that splits atoms to liberate energy.

A nuclear reactor, also referred to as a nuclear power plant, is a group of equipment that can control nuclear fission to produce energy.

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The number of oxygen atoms that are present in 7.15 x 10²³ molecules of mannose is   4.29 x 10²⁴ oxygen atoms

First, we need to identify the number of oxygen atoms that are present in one molecule of mannose. Since the molecular formula of mannose is C₆H₁₂O₆, it means that there are 6 oxygen atoms present in one molecule of mannose.

So, we can write it as follows: O = 6Now, we have to calculate the number of oxygen atoms that are present in 7.15 x 10²³ molecules of mannose. We can do this using the following steps:  Number of oxygen atoms in 1 molecule = 6  Number of molecules of mannose = 7.15 x 10²³ 

Therefore, the total number of oxygen atoms = Number of oxygen atoms in 1 molecule × Number of molecules of mannose

Total number of oxygen atoms = 6 × 7.15 x 10²³ 

Total number of oxygen atoms = 4.29 x 10²⁴ 

Therefore, there are 4.29 x 10²⁴  oxygen atoms in 7.15 x10²³  molecules of mannose.

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Answer:

210°C

Explanation:

using the equation

P1/T1=P2/T2

475/21=4750/T2

T2= (21×4750)/475

T= 210°C

Answer:

20 degrees Celsius

Explanation:

The addition of the HCl solution to the yellow solution causes the pH to decrease, which shifts the equilibrium of methyl red towards the acidic form and results in the solution turning red.

A pH indicator called methyl red changes color across a certain pH range. When the pH is below 4.4, it is yellow and when the pH is above 6.2, it is red. The pH of the mixture is neutral when methyl red is added to distilled water which is higher than the pH range where methyl red turns red. As a result, the mixture appears yellow.

Therefore, the addition of the HCl solution to the yellow solution causes the pH to decrease, which shifts the equilibrium of methyl red towards the acidic form and results in the solution turning red.

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A model can be used to visually represent the chemical reaction occurring at station 1, which can help to understand the reaction mechanism and the role of each reactant in the reaction.

A chemical reaction is a process in which one or more substances (known as reactants) are transformed into new substances (known as products) through the breaking and formation of chemical bonds.

A model can be used to represent a chemical reaction by showing the reactants and products involved and the changes that occur during the reaction. Specifically, for station 1, a model can illustrate the chemical reaction by depicting the reactants (such as hydrogen and oxygen) and the products (such as water) involved in the process.

One way to create a model of this chemical reaction is through a chemical equation, which uses chemical formulas to represent the reactants and products and shows the chemical changes that occur during the reaction. The chemical equation for the reaction at station 1 is:

2 H2 + O2 → 2 H2O

This equation shows that two molecules of hydrogen (H2) react with one molecule of oxygen (O2) to form two molecules of water (H2O). The coefficients in front of each molecule indicate the number of molecules of each substance involved in the reaction.

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Complete question:

Can you explain how a model can be used to illustrate the chemical reaction at station 1?