16. what factor would you use to convert the empirical formula of a compound to a molecular formula?

The correct pairings of substances with definitions are as follows:

a. Proton acceptor (Lewis base)

b. Proton donor (Bronsted-Lowry acid)

c. Provides OH- in water (Arrhenius base)

d. Provides H+ in water (Bronsted-Lowry acid)

e. Electron pair donor (Lewis base)

f. Electron pair acceptor (Lewis acid)

Chemical compounds known as Lewis Acids contain vacant orbitals and can accept electron pairs from Lewis Bases. This phrase was historically used to refer to chemical species that had an empty p-orbital and a trigonal planar structure. An example is NH\(_3\) (ammonia)

Bronsted-Lowry Acid: A substance that donates a proton (\(H^+\) ion) to another substance.

Example: HCl (hydrochloric acid)

Arrhenius Base: A substance that provides hydroxide ions (\(OH^-\)) when dissolved in water. An example is NaOH (sodium hydroxide)

Arrhenius theory is a limited definition that only applies to aqueous solutions, while the Bronsted-Lowry theory can be applied to any solvent.

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Answer:

The opposite action of boiling (liquid to gas, evaporation) is condensing

Sublimation is the opposite of deposition

Top antonyms for melting (opposite of melting) are frozen, advent and arrival.

Explanation:

on edg

The correct statement is option c. At a pH equal to its pI, a polypeptide carries no charged groups. The pI (isoelectric point) of a polypeptide is the pH at which it carries no net charge.

It is the pH at which the positive and negative charges on the amino acids in the polypeptide balance each other out, resulting in a neutral overall charge. At the pI, the polypeptide does not carry any charged groups because the positive and negative charges cancel each other.

The other statements are correct: a weak acid with a pKa of 4.0 will be a more effective buffer at pH 3.8 than at pH 5.7 (statement b), strong acids and bases undergo complete dissociation in water (statement d), and the pKa of an ionizable group can be influenced by the surrounding environment (statement e).

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Answer:

It would be 1096.2

Explanation:

My math might be incorrect but I am 110% sure

Answer:

*Ions

*Cation

*Anion

*Monoatomic ion

*Electrostatic forces

Explanation:

I first take back the numbers to their original forms that is to say (5.55×10^15) = 5550000000000000 and (8.88×10^18) = 8880000000000000000 therefore the difference of the two will be 887445 which is notated to (8.87445×10^5)

Answer: (8.87445×10^5)

Answer:

carbon nitrogen and oxygen

Answer:

Explanation:

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The null hypothesis in the chi-square test for two-way tables states that the two categorical variables studied are not independent in the population.

The statement is incorrect. In the chi-square test for two-way tables, the null hypothesis states that the two categorical variables being studied are independent in the population. Independence means that there is no association or relationship between the variables. The alternative hypothesis, on the other hand, assumes that there is a relationship or association between the variables.

To conduct a chi-square test for independence, a contingency table is created to display the observed frequencies of the two variables. The test compares the observed frequencies to the frequencies that would be expected under the assumption of independence. If the calculated chi-square statistic is significant, it indicates evidence against the null hypothesis of independence, suggesting that there is a relationship between the variables.

Therefore, the null hypothesis in the chi-square test for two-way tables states that the two categorical variables studied are independent in the population, not that the population means are all equal or that the population variances are all different.

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Answer:

Explanation:

Sodium Chloride = Na⁺ + Cl⁻ = NaCl

Lithium bromide = Li⁺ + Br⁻ = LiBr

Magnesium fluoride = Mg ⁺²  +  F⁻ = Mg₂F.

Potassium Oxide = K⁺ + O⁻² = K₂O

Calcium sulphide  = Ca⁺² + S⁻² = CaS

Aluminum Iodide = Al⁺³ + I⁻ = Al I₃

Barium bromide = Ba⁺² + Br⁻ = BaBr₂

Aluminum sulphide = Al⁺³ + S⁻ = Al₂S₃

Calcium Phosphide = Ca⁺² + P⁻³ = Ca₃P₂

Lithium Nitride = Li⁺ + N⁻³ = Li₃N

Magnesium Oxide = Mg⁺² + O⁻² = MgO

Aluminum Fluoride = Al⁺³ + F⁻ = AlF₃

Lithium Oxide = Li⁺ + O⁻² = Li₂O

Beryllium iodide = Be⁺² + I⁻ = BeI₂

It is important to consider shedding when assessing the potential risks associated with biohazard experiments involving research animals, and to take appropriate precautions to minimize the risk of exposure to these hazards.True.

Shedding of biohazards from research animals is an important factor to consider when evaluating the risk of conducting experiments involving these animals.

Biohazards are infectious agents or biological materials that can pose a threat to human health, animal health, or the environment. The risk of exposure to biohazards can be influenced by a variety of factors, including the route of transmission and the amount of the infectious agent or biological material present.

Shedding refers to the release of infectious agents or biological materials from animals into the environment, which can increase the risk of exposure to these hazards.

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The elements present in a carboxylic acid are: Carbon, Oxygen and Hydrogen.

A detailed explanation of the elements present in carboxylic acid is given below:

1. Carbon (C): Carboxylic acids contain at least one carbon atom. The carboxyl group, which characterizes carboxylic acids, consists of a carbon atom bonded to both an oxygen atom (through a double bond) and a hydroxyl group (-OH).

2. Oxygen (O): Carboxylic acids contain one or more oxygen atoms. The carboxyl group includes an oxygen atom bonded to the carbon atom through a double bond, and there may be additional oxygen atoms in the functional groups or substituents attached to the carbon chain.

3. Hydrogen (H): Carboxylic acids contain hydrogen atoms. Each carboxylic acid molecule has hydrogen atoms bonded to the carbon and oxygen atoms in the carboxyl group, as well as additional hydrogen atoms in the carbon chain.

Therefore, the correct elements that are present in a carboxylic acid are oxygen, carbon, and hydrogen. Nitrogen is not typically found in carboxylic acids, although it may be present in other organic compounds.

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Upon dissolving 0.3 moles of HBr in 1 L of water, one should expect an acid-base reaction to occur in the beaker. This reaction can be represented by the equation: HBr (aq) + H2O (l) → H3O+ (aq) + Br- (aq)This equation shows that the HBr molecule dissolves in water to form ions.

The H+ ion, or hydronium ion, combines with water to form the H3O+ ion. The Br- ion remains unchanged since it does not react with water. The resulting solution will be acidic because of the presence of H3O+ ions. The concentration of H3O+ ions will be determined by the extent to which HBr molecules have ionized or dissociated in the water.

This can be calculated using the formula for the ionization constant of water (Kw) and the acid dissociation constant (Ka) of HBr. Kw is equal to 1.0 x 10^-14 at 25°C. Ka for HBr is equal to 8.7 x 10^-10 at 25°C.Using these values, we can calculate the concentration of H3O+ ions in the solution.

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Answer:

1) Hacer una pregunta con respecto al fenómeno observado: ¿Por qué se apagó la estufa mientras se cocinaba la sopa?

2) Investigar sobre el tema: Los alimentos necesitan una fuente constante de calor para cocinarse. La estufa es la fuente de calor utilizada para la cocción de alimentos, existen dos modelos de estufas: (i) combustión de gas natural, (ii) inducción eléctrica.

Las estufas por combustión de gas natural requieren de un suministro de gas y una unidad de ignición, generalmente mantienen la llama una vez garantizado el suministro de gas natural. Son los modelos más económicos y comunes, aunque son las de menor eficiencia energética.

Las estufas por inducción eléctrica utilizan la energía eléctrica como suministro, la cual es transformada en calor por medio de inductores. Son más costosas que las estufas por combustión de gas natural, pero tienen mayor eficiencia energética.

Se debe determinar que tipo de estufa posee la madre de María. No obstante, una posible causa sea la interrupción del suministro, otra por daños en algún componente (gas natural o electricidad).

3) Elaborar una hipótesis: La estufa se apagó por una interrupción  en el suministro o por daños en el sistema.

4) Se realiza un experimento:

(i) Estufa por combustión de gas natural - Se abre el suministro de gas en otra hornilla, no sale gas.

(ii) Estufa por inducción eléctrica - Se enciende otra hornilla y no se activan los inductores.

5) Análisis de datos y obtención de conclusiones - Se analiza los datos y se encuentra que no existe suministro de gas/electricidad.

6) Compartir resultados - María concluye que la estufa se apagó por interrupción en el suministro.

Explanation:

El método científico consiste en el cumplimiento de los siguientes pasos:

1) Hacer una pregunta con respecto al fenómeno observado.

2) Investigar sobre el tema.

3) Elaborar una hipótesis.

4) Se prueba una hipótesis haciendo un experimento.

5) Analizar los datos y sacar una conclusión.

6) Compartir resultados.

A continuación, representamos cada paso:

1) Hacer una pregunta con respecto al fenómeno observado: ¿Por qué se apagó la estufa mientras se cocinaba la sopa?

2) Investigar sobre el tema: Los alimentos necesitan una fuente constante de calor para cocinarse. La estufa es la fuente de calor utilizada para la cocción de alimentos, existen dos modelos de estufas: (i) combustión de gas natural, (ii) inducción eléctrica.

Las estufas por combustión de gas natural requieren de un suministro de gas y una unidad de ignición, generalmente mantienen la llama una vez garantizado el suministro de gas natural. Son los modelos más económicos y comunes, aunque son las de menor eficiencia energética.

Las estufas por inducción eléctrica utilizan la energía eléctrica como suministro, la cual es transformada en calor por medio de inductores. Son más costosas que las estufas por combustión de gas natural, pero tienen mayor eficiencia energética.

Se debe determinar que tipo de estufa posee la madre de María. No obstante, una posible causa sea la interrupción del suministro, otra por daños en algún componente (gas natural o electricidad).

3) Elaborar una hipótesis: La estufa se apagó por una interrupción  en el suministro o por daños en el sistema.

4) Se realiza un experimento:

(i) Estufa por combustión de gas natural - Se abre el suministro de gas en otra hornilla, no sale gas.

(ii) Estufa por inducción eléctrica - Se enciende otra hornilla y no se activan los inductores.

5) Análisis de datos y obtención de conclusiones - Se analiza los datos y se encuentra que no existe suministro de gas/electricidad.

6) Compartir resultados - María concluye que la estufa se apagó por interrupción en el suministro.

Answer:

i really dont know but if you had answer choices it would be easier my guess is x^3 y^2

Explanation:

Answer:

The statue of liberty was made of copper. Copper is extremely weather-resistant. It will gradually oxidize copper chloride, which is greenish in

Explanation:

Because it copper and it greenish

An atom X that has 12 protons and 12 electrons, loses 2 electrons to form an ions,  the charge of ion will be X⁺² the number of protons 12 and electrons in the ions is 10.

An atom X has 12 protons and 12 electrons that means X is a neutral atom and the atomic no. is 12 because total no. of protons is equal to atomic number. When it looses the 2 electrons then atom becomes positively charged ion . the charge on the ion is +2.

now, the no. of protons will be = 12

number of electrons will be = 12 - 2 = 10

Thus, An atom X that has 12 protons and 12 electrons, loses 2 electrons to form an ions,  the charge of ion will be X⁺² the number of protons 12 and electrons in the ions is 10.

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There are two chemical components in a sample of olivine: magnesium oxide (MgO) and iron oxide (FeO).

Olivine is a solid solution of forsterite and fayalite, meaning that the two compounds are mixed together in varying proportions. However, the chemical composition of olivine can be described in terms of its two components, MgO and FeO. The ratio of these two components determines the overall chemical composition of olivine.

A solid solution is a mixture of two or more substances that form a homogeneous solution when mixed together in a solid state. In the case of olivine, forsterite and fayalite can form a solid solution when they are mixed together in varying proportions. This means that when olivine is formed, some of the magnesium ions in forsterite are replaced by iron ions from fayalite, and vice versa.

The chemical composition of olivine can be expressed as a formula, (Mg,Fe)2SiO4, which indicates that it contains a variable mixture of magnesium and iron ions. This formula represents a single chemical phase, but it has two chemical components: magnesium oxide (MgO) and iron oxide (FeO). These two components are the basic building blocks of olivine and determine its overall chemical and physical properties.

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Answer:

In his 1805 work, "A New System of Chemical Philosophy," Dalton propounded the tenets of his atomic theory: The chemical elements are made of atoms. The atoms of an element are identical in mass. Atoms of different elements have different masses.

Hope it helps.... If yes mark me as brilliants

The volume of 0.175M sodium sulfate solution that is necessary to completely react with 35.0 mL of 0.112M silver nitrate is 22.4mL.

Molarity is the concentration of a substance in solution, expressed as the number moles of solute per litre of solution.

The volume of a solution can be calculated using the following expression:

CaVa = CbVb

Where;

According to this question, 0.175M sodium sulfate solution completely reacts with 35.0 mL of 0.112M silver nitrate. The volume required for this reaction to occur can be calculated as follows:

0.175 × Va = 35 × 0.112

0.175Va = 3.92

Va = 3.92/0.175

Va = 22.4mL

Therefore, 22.4mL is the volume of the sodium sulfate needed.

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Answer:

2.7 mL

Explanation:

The equation of the reaction is;

2AlBr3 + 3Cl2 -----> 2AlCl3 + 3Br2

Number of moles in 2.12 x 1022 formula units of aluminum bromide

1 mole of AlBr3 = 6.02 * 10^23 formula units

x moles = 2.12 x 1022 formula units

x = 2.12 x 1022 formula units  * 1 mole/ 6.02 * 10^23 formula units

x = 0.0352 moles of AlBr3

According to the reaction equation;

2 moles of AlBr3 produces 3 moles of Br2

0.0352 moles of AlBr3 produces 0.0352 moles  *  3 moles /2 moles

= 0.0528 moles of Br2

Mass of Br2 produced = 0.0528 moles of Br2 * 159.808 g/mol

Mass of Br2 produced = 8.44g

But density = mass/volume

volume = mass/density

volume of Br2 = 8.44 g/ 3.12 g/mL

volume of Br2 =  2.7 mL

Answer:

A. wearing sunglasses to to protect eyes from UV rays

Explanation:

Your eyes are outside of your body, meaning external. All the other choices deal with internal organs.

The energy change of a reaction, ΔH, as determined from the bond energies is -804 kJ/mol.

The energy change of a reaction, ΔH, is determined from the formula below:

Energy change, ΔH = sum of the bond energies of bonds being broken - sum of the bond energies of the bonds being formed.

The sum of the bond energies of bonds being broken = (413 * 4) + (2 * 498)

The sum of the bond energies of bonds being broken = 2648 kJ/mol

The sum of the bond energies of the bonds being formed = (2 * 798) + (2 * 2 * 464)

The sum of the bond energies of the bonds being formed =  3452 kJ/mol

Energy change, ΔH = 2648 kJ/mol - 3452 kJ/mol

Energy change, ΔH = -804 kJ/mol

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Answer:

157 grams magnesium chloride

Explanation:

1.  We must first find the molar mass (g/mole) of magnesium chloride.  The molecular formula is MgCl2.

Add the elemental atromic weights for one molecule of the material:

1 Mg = 24.3

2 Cl = 2*(35.45) = 70.9

Total = 95.2 grams/mole

We can use this as a conversion factor by multiplying it times the moles we are asked to convert:  (1.65 moles MgCl2)*(95.2 grams/mole MgCl2).

The moles cancel, leaving us with 157 grams of magnesium chloride.

You need 11.93 grams of calcium hydride to produce 6.84 L of hydrogen gas at 25.0°C and 0.975 atm.

To produce 6.84 L of hydrogen gas at 25.0°C and 0.975 atm, you need 4.86 grams of calcium hydride.

1. Convert the given volume, temperature, and pressure of hydrogen gas to moles using the ideal gas law (PV = nRT).
2. Use the chemical equation to find the moles of calcium hydride required to produce the calculated moles of hydrogen gas.
3. Convert moles of calcium hydride to grams using its molar mass.

Step 1: Calculate moles of hydrogen gas
n = PV / RT = (0.975 atm * 6.84 L) / (0.0821 L atm/mol K * (25°C + 273.15 K)) = 0.2833 mol H₂

Step 2: Moles of calcium hydride
CaH2 → Ca + H₂ (1 mol CaH₂ produces 1 mol H₂)
0.2833 mol H₂ requires 0.2833 mol CaH₂

Step 3: Convert moles to grams
Molar mass of CaH₂ = 40.08 g/mol (Ca) + 2 * 1.01 g/mol (H) = 42.10 g/mol
0.2833 mol CaH₂ * 42.10 g/mol = 11.93 g

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A closed system is one in which there is no exchange of materials or energy with the surroundings hence the correct assumption is that "No heat is lost from the flame or the egg to the surroundings."

Another name for a closed system is an isolated system. In such system, there is exchange of material or energy between the system and the surroundings.

In this case, the system comprises of the pan and the eggs. If the system is to be a closed system then " No heat is lost from the flame or the egg to the surroundings."

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