Which strategy will most decrease the number of people sickened by water-borne diseases?

a. increased use of solar power
b. increased use of fungicides
c. improved agriculture
d. better sanitation systems

The oxidation state of the metal species, Fe, in the complex ion [Fe(CN)(CO)5]2- is -1.

In order to determine the oxidation state of the metal species (Fe) in the complex ion [Fe(CN)(CO)5]2-, we first need to examine the individual ligands and their respective charges.

The ligands in the complex ion are cyanide (CN-) and carbonyl (CO). Cyanide is a monodentate ligand with a charge of -1, while carbonyl is a neutral ligand with a charge of 0. Since there is only one cyanide ligand, the total charge from cyanide is -1. There are five carbonyl ligands, but as they are neutral, they do not contribute any charge to the complex.

Now, we know the overall charge of the complex ion is -2, as indicated by the 2- in the formula. Considering the charges from the ligands, we can set up an equation to find the oxidation state of the metal species, Fe:

Fe + (-1) + 5(0) = -2

Simplifying the equation, we get:

Fe - 1 = -2

Adding 1 to both sides of the equation, we arrive at:

Fe = -1

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So I entered the answer, which is a=b=c=e>d, but it says it's incorrect.  the final temperature from the initial temperature, multiplying it by the mass, and multiplying it again by the water's specific heat.

Why is water's specific heat so high?

Hydrogen bonds between water molecules are what give water its remarkable thermal conductivity. Hydrogen bonds are disrupted and water molecules can move freely when heat is absorbed. Hydrogen bonds are created and release a significant quantity of energy when the temperature of water drops.

Why does temperature-related specific heat rise?

The average kinetic energy of the molecules increases as the substance heats up. The collisions generate sufficient energy to support rotation. Rotation

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The statement "Molecules can bind weakly to other molecules in van der Waals bonds" is a true statement.

Van der Waals forces are the weakest of all intermolecular forces but are vital to some processes. The molecule is made up of atoms. Electrons are orbiting around the atoms in a specific manner. This charge distribution generates an electric field. It induces a corresponding electric field in a neighboring molecule.

A positively charged nucleus of one molecule can interact with the negatively charged electrons of the other. This leads to weak bonding between the two molecules.Van der Waals forces arise from the interaction of electron distributions around atoms. The interactions between molecules are critical to the survival of many biological systems. This interaction is most commonly referred to as the London Dispersion Force (LDF). The magnitude of the van der Waals interaction can be determined by comparing the molecular polarizability with the average intermolecular distance. The longer the contact time, the greater the possibility of London dispersion forces acting as an adhesive force. Hence, the statement is true.A van der Waals force is an attraction between atoms, molecules, and surfaces, and the forces that hold molecules together. It's a weak attraction between two atoms that results from fleeting changes in electron distribution within molecules.

molecules can bind weakly to other molecules in van der Waals bonds. The magnitude of the interaction can be determined by comparing the molecular polarizability with the average intermolecular distance.

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Answer:

The first one is Propane

The second one is HEPTANE

The third one is octane

The 4th is butane

the 5th is decane

The structures have been named according to IUPAC as \(\rm C_3H_8\) Propane, \(\rm C_7H_{16}\) Heptane, \(\rm C_8H_{18}\) Octane, \(\rm C_4H_{10}\) Butane, and \(\rm C_{10}H_{22}\) Decane.

The images has been the representation of the ball and stick structure of the compounds. The central balls have been the representation of the carbon atom , with small balls attached to the sticks have been the representation of the hydrogen attached.

The following structures has been given as:

The structures have been named according to IUPAC as \(\rm C_3H_8\) Propane, \(\rm C_7H_{16}\) Heptane, \(\rm C_8H_{18}\) Octane, \(\rm C_4H_{10}\) Butane, and \(\rm C_{10}H_{22}\) Decane.

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If A 25-gram block of Aluminum has an initial temperature of 35 degree Celcius. The final temperature will be  57.37°C

The amount of energy needed to raise the temperature of 1 kilogram of tissue by 1 K (=1°C) is measured by the specific heat capacity of tissue, or c [J/(kg K)]. For instance, fat has a lower specific heat capacity than other soft tissues, which means that it needs less energy to raise temperature. The energy needed to increase the temperature of 1 m3 of tissue by 1 K (=1°C) can be found by multiplying specific heat capacity by mass density (c [J/(m3 K)]), which is the same as a volume-specific heat capacity.

The final temperature can be calculate as follows:

Accordingly, the amount of energy generated is equal to the system's mass times its temperature change and times its specific heat.

Q=mcΔT

where,

Q= the amount of energy generated

m = mass

c = spesific heat

ΔT= temperature change

so, ΔT= final temperature - initial temperature =(x−35) °C

Therefore,

Q=mcΔT

503.38 = 25 × 0.9 × (x - 35)°C

(x - 35) =  503.3 / 25 × 0.9

x = 57.37°C

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Answer: It is 443.1792 high in Meters.

Explanation:

Answer:

2.2)solido

2.3)Sólido cristalino

2.4)Sólido amorfo

The isotopes average atomic mass for the element of iron is  55.845 u

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The movement of one or more electrons from one reactant to another is the key chemical event in an oxidation-reduction reaction, also called a(n) redox reaction.

What is a redox reaction?

A redox reaction (reduction-oxidation reaction) is a chemical reaction in which electrons are transferred from one molecule (the reductant) to another (the oxidant). This transfer leads to changes in the oxidation state of the molecules involved and results in the formation of two new species: a reduced species (acceptor of electrons) and an oxidized species (donor of electrons). This type of reaction is important in many natural processes, such as cellular respiration, corrosion, and photosynthesis.

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Answer:

Medicinal Chemistry

Explanation:

Medicinal Chemistry deals with the development, design and production of medicines.

Hope it helps!

Have a nice day:)

Answer:

To find the identity of the isotope we must first calculate the mass number

Mass number (M) = A + Z

Where

A is the atomic number

Z is the neutron number

A = 47

Z = 60

M = 60 + 47 = 107

From the options above

The answer is option A

Hope this helps you

Answer:

the answer would be B

Explanation:

The move vigorously it is the higher the reactivity so if you put it in order the answer would be B

Answer:

22

Explanation:

22

The net ionic equations of the reactions are;

3Mn^3+(aq) + 4PO4^3-(aq) ----> Mn3(PO4)4(s)

Pd^2+(aq)  +  S^2-(aq) ----> PdS(s)

A net ionic equation is a chemical equation that shows only the species that participate in a reaction and contribute to the formation of a product or the consumption of a reactant.

It excludes any spectator ions that do not undergo a chemical change. In other words, it shows the actual chemical species that are involved in the reaction.

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SF₆

Molar mass: 146.06 g/mol

mole = 25 : 146.06 = 0.171

molecules:

=0.171 x 6.02 x 10²³

=1.03 x 10²³

The synthesis of silver nanoparticles can involve various methods and conditions, but a general order of steps in a typical synthesis process might be as follows:

Preparation of the silver precursor: Silver nitrate (AgNO3) is commonly used as a silver precursor. It is dissolved in water or other suitable solvents to prepare a silver precursor solution.

Preparation of the reducing agent: A reducing agent, such as sodium borohydride (NaBH4) or sodium citrate, is prepared separately. The reducing agent will react with the silver precursor to form silver nanoparticles.

Mixing the silver precursor and reducing agent: The silver precursor solution and the reducing agent solution are mixed together under suitable conditions, such as controlled temperature and stirring, to allow the reduction reaction to occur.

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The phrase "novel synthesis and structural characterization of fluorine and chlorine co‐substituted hydroxyapatites" refers to a scientific study or research project that involves creating and analyzing a new type of hydroxyapatite that contains both fluorine and chlorine atoms in its structure.

Hydroxyapatite is a mineral that is naturally found in bone and teeth and is often used in biomedical applications. By substituting some of the hydroxyl (OH-) groups in hydroxyapatite with fluorine (F) and chlorine (Cl) atoms, researchers can modify its properties and potentially enhance its performance in certain applications.

The study would involve developing a new method or process to synthesize these fluorine and chlorine co-substituted hydroxyapatites and then characterizing their structure using various techniques such as X-ray diffraction or spectroscopy. The goal is to understand the atomic arrangement and properties of these novel materials.

Overall, this research aims to contribute to the field of materials science and potentially lead to the development of improved hydroxyapatite-based materials for various biomedical applications.

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Answer:

Yes the air particles have mass

Explanation:

Air is mater: it has weight and occupies space. For it to have weight, it has to have a mass. The mass would however be determined by how much volume of air is trapped in the container, but nevertheless, the mass of the air can be obtained.

We also notice that if the container is "popped", the mass of air escapes through one way by the weight exerted on it.

I hope this was helpful.

Answer:

Yes the air particles have mass

Explanation:

You can tell that if the container is pooped open the mass of air escapes

Answer:

C. B

Explanation:

Answer:

10

Explanation:

Atomic number = No. of protons

Therefore, the number of protons of an element with an atomic number of 10, is also 10.

Answer:

0.142

Explanation:

Answer:

0.142 moles.

You would have to convert the algorithm to a broken down version of the compound.

NH4NO3(aq] → NH+4(aq] + NO−3(aq]

The ammonium is removed for this case, concentration gets broken down to zero.

So here, if 1 liter is equal to 10 x 10 x 10 milliliters...

use the formula of n and c to help you figure out the moles.

C is equal to N divided by V, so in that case...

N equals C times V.

C times V is 0.425, or 17 over 40 in simplest form.

From there, multiply 17 over 40 by the current moles, cross out the liters, and multiply by 335, then, 10 to the power of -3. You have to flip it to negative, because it will cancel out either way. Change the equation by the liters, and you have 0.125

Hence, your correct answer is 0.125

Answer:

electromagnetic waves and mechanical waves

Explanation:

I think these two kinds of waves can transmit energy through a vaccume.

Hope I helped!

Electromagnetic waves.

Gravity waves.

Answer:

Explanation:

Mide 2mL de etanol, añadelo a un matraz aforado, pon agua hasta llegar a 100mL

By using the ideal gas law to get volume we have"

Where v is volume, T is temperatute, n is number of moles, R is the molar gas constant and P is pressure. At STP P= 101,325 Pa, T= 273.15 K and R= 8.314 J/mol K

We must first convert mass to moles:

By substituting this value into the ideal gas law we have:

1.9502e-6L of H2 gas reacted at STP

When water (H2O) is added to liquid isopropanol to form a solution, then polar isopropanol molecules are attracted to polar water molecules at the surface of the water. It forms a solution of rubbing alcohol.

Isopropyl alcohol is water-soluble and forms hydrogen bonds with molecules of water (H2O).

When H2O is added to liquid isopropanol to form a solution, H2O spread in a uniform way in the solution.

These isopropanol molecules can surround H2O molecules, which are carried into the solution.

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Answer:

1
4
3
2

Explanation:

There are approximately 0.0004995 carbon atoms in 10.0 mg of aspirin.

The molar mass of aspirin (C9H8O4) is 180 g/mol. Calculate the number of carbon atoms in 10.0 mg of aspirin. The molar mass of C9H8O4 = 9 x atomic mass of C + 8 x atomic mass of H + 4 x atomic mass of O= 9 x 12.011 + 8 x 1.008 + 4 x 15.999= 180.16 g/mol.

Hence, 1 mole of aspirin weighs 180.16 g and contains 9 moles of carbon atoms (1 mole of C9H8O4 contains 9 carbon atoms). Number of moles of aspirin in 10.0 mg = 10.0 mg/180.16 g/mol= 0.0000555 mol. Number of carbon atoms in 10.0 mg of aspirin= 9 x 0.0000555= 0.0004995.

Therefore, there are approximately 0.0004995 carbon atoms in 10.0 mg of aspirin.

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Ketoses such as fructose are expected to give a positive Tollens test because of their ability to reduce Tollens' reagent.

The Tollens test is a chemical reaction used to test for the presence of aldehydes. The test is named after the German chemist Bernhard Tollens. The Tollens reagent is a solution of ammoniacal silver nitrate, Ag(NH3)2NO3. The test is based on the fact that aldehydes are readily oxidized to carboxylic acids by a solution of silver nitrate in ammonia.

This reaction is exothermic and produces a silver mirror on the inside of the test tube.The test solution is prepared by adding a few drops of a solution of Tollens' reagent to the substance being tested. The test solution is then heated in a water bath for a few minutes.

If the substance being tested is an aldehyde, it will reduce the silver ions in the Tollens' reagent to metallic silver. The metallic silver will form a mirror on the inside of the test tube. If the substance being tested is not an aldehyde, no mirror will form.The aldehydes are more easily oxidized than the ketoses.

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