I need help on thiss

Answer:

It's photosynthesis.

Answer:

Water is a remarkable substance, and its unique properties are largely due to the presence of polar covalent bonds and hydrogen bonds in its structure. These characteristics play a crucial role in the physical and chemical properties of water, making it essential for life as we know it.

Explanation:

The polar covalent bonds in water arise from the unequal sharing of electrons between oxygen and hydrogen atoms. This results in the oxygen atom having a partial negative charge (δ-) and the hydrogen atoms having partial positive charges (δ+). These charges create polarity within the water molecule, leading to the formation of hydrogen bonds.

Hydrogen bonds occur when the partially positive hydrogen atom of one water molecule is attracted to the partially negative oxygen atom of another water molecule. These hydrogen bonds are relatively weak individually, but when present in large numbers, they contribute to the cohesion, surface tension, and high boiling point of water.

The importance of these bonds is manifold. The cohesion between water molecules due to hydrogen bonding enables water to form droplets, have a high surface tension, and flow freely, facilitating transport within organisms and in the environment. Additionally, hydrogen bonding leads to the high specific heat capacity and heat of vaporization of water, making it an effective regulator of temperature in living organisms and ensuring stable environmental conditions.

Furthermore, hydrogen bonds play a crucial role in the unique properties of water as a solvent. The polar nature of water allows it to dissolve a wide range of substances, including ionic compounds and polar molecules, facilitating various biological processes such as nutrient transport and chemical reactions in cells.

The statement 'whether people should take medicine or if they should seek alternative treatments' describes an ethical dilemma that drug designers face.

Drug development refers to all the processes from target drug identification to drug validation and commercialization.

Drug development involves different stages of development including preclinical and clinical trials.

Ethical dilemmas in drug development include the release of a drug that is ineffective when compared to parallel treatments.

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Answer:

A drug for blood pressure is absorbed in the colon. It is effective, but occasionally it can erode the colon walls.

Explanation:

i just took the test and got it right.... i hope this helps :)

Answer:

1.VOLUME– The amount of space an object takes up. Basic Unit (SI Unit) for Solids – Cubic Meter, m3. LENGTH/DISTANCE – The measurement between two points.

2.one particle per cubic meter.

3.it means it is heavier

4.In a liquid the particles are still close together but a little further apart than in a solid.

5.In gases the particles are much further apart than in solids or liquids.

Explanation:

thats all i can type lol

Answer: northern hemisphere

Explanation: I looked it up. Plus I took a test with this question and when the teacher went over the answer i got it right.

1.26 × 10⁻³ s⁻¹ is the rate constant of a first-order process that has a half-life of 550 s. Hence, option B is correct answer.

A first-order process is a chemical reaction in which the rate of reaction is directly proportional to the concentration of a reactant raised to the power of one. Mathematically, the rate law for a first-order process is:

Rate = k[A]

where,

[A] is the concentration of the reactant, and

k is the rate constant, which is specific to the reaction and temperature.

The half-life of a first-order reaction is given by:

\(t_{1/2} = \frac{0.693}{k}\)

where

k is the rate constant of the reaction.

Rearranging this equation, we get:

\(k = \frac{0.693}{t_{1/2}}\)

Substituting \(t_{1/2} = 550\ s\) we get:

k = 0.693 / 550 s

k = 1.26 × 10⁻³ s

Therefore, the rate constant of the first-order process is 1.26 × 10⁻³ s⁻¹.

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In a solution, when the concentrations of a weak acid and its conjugate base are equal: 1. the -log of the concentration of H+ and the -log of the Ka are equal.

Any acid that entirely ionises in solutions is considered a strong acid. When positioned, it emits the most hydrogen ions or protons.

Acids that don't entirely dissociate in solution are referred to as weak acids. In other words, any acid that is not a strong acid qualifies as a weak acid. The amount of dissociation determines how strong an acid is; the more dissociation, the stronger the acid.

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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.

If 2500 grams of H2SO4 react with excess NH3 according to the illustration, the amount of ammonium sulfate that can be produced would be 3,370.92 grams. If only 3100 grams of ammonium sulfate were produced, the percentage yield would be 91.96%.

From the equation of the reaction:

2NH3(aq) + H2SO4(aq) → (NH4)2SO4(aq)

The mole ratio of H2SO4 and (NH4)2SO4 is 1:1

Mole of 2500 grams H2SO4 = 2500/98 = 25.51 moles

Equivalent mole of (NH4)2SO4 = 25.51 moles

Mass of 25.51 moles (NH4)2SO4 = 25.51 x 132.14 = 3,370.92 grams

If 3100 g of (NH4)2SO4 were actually produced, the percentage yield would be:

Percent yield = 3100/3370.92 x 100 = 91.96%

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Answer:

Explanations:

The formula for calculating the amount of carbohydrate in the potato is expressed as:

Given the following parameters:

Mass of CHO = 20 g

caloric value = 4kcal/g

Substitute the parameters into the formula

amount of kcal = 20g * 4kcal/g

amount of kcal obtained = 80kcal

Hence the amount of kcal obtained from the carbohydrate in the potato is 80kcal

If the molar mass of water is 18.02 g/mol, and the heat of vaporization of water is 40.67 kj/mol, then the energy required to vaporize 12 g of water is 27,12 kJ.

To calculate the energy required to vaporize 12 g of water, we first need to convert the mass of water to moles:

12 g of water / 18.02 g/mol = 0.666 moles of water

Then, we can use the heat of vaporization of water to calculate the energy required:

0.666 moles of water x 40.67 kJ/mol = 27.12 kJ

Therefore, it would take 27.12 kJ to vaporize 0.666 moles of water, or in another words, the energy required to vaporize 12 g of water is 27,12 kJ.

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The most common form of kinetic energy that is released from chemical energy in chemical reactions is heat energy.

Heat is the transfer of thermal energy between two objects or systems that are at different temperatures. In a chemical reaction, the molecules of the reactants collide with each other, and the resulting kinetic energy is converted into heat.

The amount of heat that is transferred between two objects depends on the difference in temperature between the objects and the amount of time that the objects are in contact with each other. The greater the difference in temperature between the objects, the greater the amount of heat that will be transferred. The longer the objects are in contact with each other, the greater the amount of heat that will be transferred.

Heat can also be transferred by convection, radiation, and conduction. Convection is the transfer of heat by the movement of fluids. Radiation is the transfer of heat by electromagnetic waves. Conduction is the transfer of heat by the contact of two solid objects.

This is because when chemical reactions occur, the atoms and molecules that make up the reactants are moving at high speeds and bumping into each other. This collision releases energy in the form of heat .In a chemical reaction, heat energy is needed to break the bonds between the atoms or molecules of the reactants. This energy is called the activation energy. Once the bonds are broken, the atoms or molecules can rearrange themselves to form the products of the reaction.

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To determine how many moles of O2 can be produced by letting 12 mol of KClO3 react in the given equation, we first need to use stoichiometry. Stoichiometry is the study of the quantitative relationships between reactants and products in a chemical reaction. The coefficients in the balanced chemical equation tell us the mole ratios of the reactants and products.

From the balanced equation, we can see that for every 2 moles of KClO3 that react, 3 moles of O2 are produced. This means that the mole ratio of KClO3 to O2 is 2:3. To find out how many moles of O2 can be produced from 12 mol of KClO3, we can set up a proportion:
2 mol KClO3 / 3 mol O2 = 12 mol KClO3 / x mol O2
Solving for x, we get:
x = (3 mol O2 * 12 mol KClO3) / 2 mol KClO3
x = 18 mol O2
Therefore, 12 mol of KClO3 can produce 18 mol of O2 in the given equation.

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Answer:

energy disturbance easy

Answer:

line graph

Explanation:

The type of graph would be used to display the data is line graph.

Graph is defined as a visual representation, such as a picture or diagram, that shows information or values in a structured way.  The graph's goal is to visually represent numerical data so that it can be quickly, simply, and clearly understood. As a result, graphs are visual displays of data.

Although a graphical display is easier to understand, data can also be presented as a table. For this kind of data, a line graph will be used. This will show more clearly how the temperature of the water fluctuates over the course of two hours. Time is an independent variable, whereas temperature is a dependent variable.

Thus, the type of graph would be used to display the data is line graph.

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After your body food break down 'proteins, fats and carbohydrates are digested, absorption takes place in the small intestine'

Most of the digestion occurs in the first part of the small intestine while the absorption of broken down nutrients, water, vitamins, and minerals occurs in the rest of it and the small intestine absorbs most of the nutrient in food, and then circulator system passes them into other parts of body to store and use them

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Answer:

below

Explanation:

From periodic table the shell electrons are 2 8 and 6 so:

   1s2          2s2   2p6          3s2   3 p4        for sulfur

the noble gas config is then  (neon + 6) =

     [Ne]   3s2   3p4

The calcium ion has 18 protons, 20 neutrons, and 20 electrons.
The relationship between the components a and b is Inverse proportion.


The calcium ion (Ca2+) has a 2+ charge, indicating that it has lost 2 electrons from its neutral state. To determine the number of protons, neutrons, and electrons in the calcium ion, we need to consider its atomic number and mass.

The atomic number of calcium is 20, which indicates that it has 20 protons. Since the calcium ion has a 2+ charge, it means it has lost 2 electrons. Therefore, the number of electrons in the calcium ion is 20 - 2 = 18.

The mass number of calcium is 40 amu, which represents the total number of protons and neutrons. Since the calcium ion has 20 protons, the number of neutrons can be calculated as 40 - 20 = 20.

So, the correct option is: d. 18 protons, 20 neutrons, and 20 electrons

In the expression a∼1/b, the relationship between the components a and b is an inverse proportion. This means that as the value of a increases, the value of b decreases, and vice versa. The symbol ∼ represents the proportional relationship between a and 1/b, indicating that they are inversely related. Therefore, the correct answer is: Inverse proportion

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Answer:

40m/s

Explanation:

final velocity is = initial velocity + Acceleration x time

Answer:

Tropical deserts and temperate deserts differ in terms of their location, temperature, and precipitation patterns.

Tropical deserts are found near the equator and typically have hot temperatures year-round, with average temperatures ranging from 80 to 100°F (27 to 38°C). They receive very little rainfall, usually less than 10 inches (25 cm) per year, and may experience long periods of drought. Examples of tropical deserts include the Sahara in Africa, the Arabian Desert in the Middle East, and the Mojave Desert in North America.

In contrast, temperate deserts are located in the middle latitudes and have more variable temperatures, with hot summers and cold winters. Average temperatures range from 55 to 75°F (13 to 24°C). They also receive very little rainfall, usually less than 10 inches (25 cm) per year, but may receive more precipitation in the form of snow during the winter months. Examples of temperate deserts include the Sonoran Desert in North America and the Gobi Desert in Asia.

Overall, both types of deserts are characterized by their arid conditions, but tropical deserts tend to be hotter and have more consistent temperatures throughout the year, while temperate deserts have more variation in temperature between seasons.

Explanation:

Answer:

A student is drinking a cup of hot chocolate as they sit by a campfire on a chilly evening. They know that the cup of hot chocolate transfers thermal energy to the surrounding air. The heated air over their cup of hot chocolate expands and rises and is replaced by cooler, denser air.

This method of energy transfer is

Explanation:

Answer:

radiation

Explanation:

radiation is when an existing heat source spreads heat to its surroundings

Purified water when growing nanoparticles in solution must be used so that The number of ions in solution must be carefully controlled

A particle that is smaller than 100 nm in size is referred to as a nanoparticle. These kinds of particles have many uses, particularly in the materials sector. Because the presence of ions in solution might alter the characteristics of the nanoparticles and the stability of the solution, purified water is frequently utilised while developing nanoparticles in solution.

To guarantee constant and repeatable development of nanoparticles, the number of ions in the solution must be carefully regulated. Ions in a solution can alter a nanoparticle's surface charge, which in turn can alter its stability and behaviour. There are several ways to manage ions in a solution, including utilising filtered water, altering the solution's pH, and employing salts to regulate the ionic strength of the solution.

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The standard enthalpy change for reaction (3) is 117.1 kJ.

The standard enthalpy change for reaction (3) can be calculated by using the enthalpy changes of reactions (1) and (2) and applying Hess's Law.

To do this, we need to manipulate the given equations so that the desired reaction (3) can be obtained.

First, we reverse reaction (1) to get the formation of C2H4(g) from C2H6(g):

C2H4(g)C2H6(g) ΔH° = -52.3 kJ

Next, we multiply reaction (2) by 2 and reverse it to obtain 2 moles of C2H6(g) reacting to form 3 moles of H2(g):

2C2H6(g)2C(s) + 3H2(g) ΔH° = 169.4 kJ

Now, we add the two modified equations together:

C2H4(g)C2H6(g) ΔH° = -52.3 kJ
2C2H6(g)2C(s) + 3H2(g) ΔH° = 169.4 kJ

When adding these equations, the C2H6(g) on the left side cancels out with the C2H6(g) on the right side, leaving us with the desired reaction (3):

C2H4(g) + H2(g)C2H6(g) ΔH° = -52.3 kJ + 169.4 kJ = 117.1 kJ

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Answer:

· Matter is anything that takes up space.

· A liquid is anything that isn't a solid or gas.

· Gas is anything that isn't a solid or liquid.

· A molecule is when chemically two or more atoms come together.

Explanation:

:)

The compound formed when magnesium oxide reacts with water is magnesium hydroxide (Mg(OH)₂).

Magnesium oxide (MgO) is an ionic compound consisting of magnesium cations (Mg²⁺) and oxide anions (O²⁻). When it reacts with water (H₂O), the oxygen atom in water attracts the magnesium cation, leading to the formation of magnesium hydroxide.

The reaction can be represented as follows:

MgO + H₂O → Mg(OH)₂

In the resulting compound, magnesium hydroxide, there are two hydroxide ions (OH-) for every magnesium ion (Mg²⁺). The chemical formula Mg(OH)₂ represents this ratio.

Magnesium hydroxide is an alkaline compound and is commonly used as an antacid to treat heartburn and indigestion. It is also used in various industrial applications.

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There are various kind of elements that are present in periodic table. Some elements are harmful, some are radioactive, some are noble gases. Therefore, the given statement is true.

Periodic table is a table in which we find elements with properties like metals, non metals, metalloids and radioactive element arranges in increasing atomic number.

Periodic table help a scientist to know what are the different types of elements are present in periodic table so that they can discover the new elements that are not being discovered yet.

One periodic trend is Periods represent the number of energy levels in an atom model. The period number represents the valence shell of an element and hence valence shell is the energy level of the element.

Therefore, the given statement is true.

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Answer:

independent variable - the thing you change

dependent variable - the thing you measure

control variables - the things you keep the same

Answer:

The answer is 21.5 L

Explanation:

i think Neuterons i am right

Answer:

I do not know srry

Explanation: