In which of the following compounds would the carbon-carbon bond angle diverge the greatest from the ideal tetrahedral angle?

Answer:

1. Using the ideal gas law, PV = nRT, where P is pressure, V is volume, n is the number of moles, R is the gas constant, and T is temperature in Kelvin, we can solve for V:

V = (nRT) / P

Plugging in the given values, we get:

V = (0.210 mol)(0.08206 L·atm/mol·K)(295.5 K) / 1.00 atm

V = 4.91 L

Therefore, the sample of gas occupies 4.91 L.

2. We can use the combined gas law to find the new volume of the sample at the new temperature and pressure:

(P1V1) / (n1T1) = (P2V2) / (n2T2)

At conditions 1, we know P1 = 1.00 atm, V1 = 4.91 L, n1 = 0.210 mol, and T1 = 295.5 K.

At conditions 2, we know P2 = 1.00 atm (pressure is constant), n2 = n1 (number of moles is constant), and T2 = 95.0 + 273.15 = 368.15 K.

Solving for V2, we get:

V2 = (P1V1n2T2) / (n1T1P2)

V2 = (1.00 atm)(4.91 L)(0.210 mol)(368.15 K) / (0.210 mol)(295.5 K)(1.00 atm)

V2 = 7.23 L

Therefore, the new volume of the sample at the higher temperature is 7.23 L.

3. At STP (standard temperature and pressure), which is 0 °C (273.15 K) and 1 atm, the molar volume of an ideal gas is 22.4 L/mol. Therefore, the number of moles of gas can be calculated as:

n = V / Vm

where Vm is the molar volume of gas at STP, which is 22.4 L/mol.

n = 2.82 L / 22.4 L/mol

n = 0.126 mol

The molar mass of the gas can be calculated as:

molar mass = mass / n

mass = 2.54 g

molar mass = 2.54 g / 0.126 mol

molar mass = 20.16 g/mol

Therefore, the molar mass of the gas is 20.16 g/mol.

4. Let's assume that the total number of moles in the mixture is 1 (since we don't know the actual amount). The first gas constitutes 65% of the mixture, so its mole fraction is 0.65. Therefore, the mole fraction of the second gas is 0.35 (since the sum of the mole fractions must equal 1). The partial pressures of the two gases can be calculated using the mole fractions and the total pressure:

Pgas1 = mole fraction of gas 1 x total pressure

Pgas1 = 0.65 x 4.3 atm

Pgas1 = 2.79 atm

Pgas2 = mole fraction of gas 2 x total pressure

Pgas2 = 0.35 x 4.3 atm

Pgas2 = 1.51 atm

Therefore, the partial pressure of the first gas is 2.79 atm and the partial pressure of the second gas is 1.51 atm.

5. The mole fraction of a gas is the ratio of the number of moles of that gas to the total number of moles in the mixture. We can find the total number of moles by adding up the partial pressures of the gases and dividing by the total pressure:

total moles = (partial pressure of gas A + partial pressure of gas B + partial pressure of gas C) / total pressure

total moles = (0.75 atm + 0.50 atm + 0.25 atm) / 1.50 atm

total moles = 1.50 moles

To find the mole fraction of helium, we need to know the number of moles of helium. We can use the partial pressure of helium and the total pressure to calculate the number of moles of helium using the ideal gas law:

n = PV / RT

n = (0.50 atm)(1.00 L) / (0.08206 L·atm/mol·K)(298 K)

n = 0.0202 mol

Now we can calculate the mole fraction of helium:

mole fraction of helium = moles of helium / total moles

mole fraction of helium = 0.0202 mol / 1.50 moles

mole fraction of helium = 0.0135

Therefore, the mole fraction of helium in the gas mixture is 0.0135.

The r shows axial conformation at the equilibrium of the cyclohexane and mono groups.

Axial: In cyclohexane, a bond that is parallel to the axis of the ring, or a set connected via way of means of this type of bond. A = axial positions; E = equatorial positions.

Because the axial function locations the R corporations in the direction of the hydrogen atoms on the opposite carbons, the axial conformation calls for better to triumph over the extra steric interactions. This outcomes in R values which can be weighted toward the equatorial conformation. The larger, greater complicated the R group, the greater electricity this is required to triumph over the delivered steric interaction.

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Answer:

1 mole of any ideal gas occupies the same volume as one mole of any other ideal gas under the same conditions of temperature and pressure.So 1 L CO2 has same number of moles as 1 L O2 and 1 L N2 etc.This means that, assuming all the gases in air are ideal gases, if CO2 is 4.0 % by volume then it is also 4.0 % by moles, because a volume of each gas has the same number of moles.

Explanation:

Answer:

Kichi made the an error in the 2nd row which is Sulfuric acid.

Sulfuric acid would be found in the garage because it is used in car batteries

Explanation:

Ammonium hydroxide (NH4OH) is used in household cleaners.

Sulfuric acid (H2SO4) is used in industrial chemicals and car batteries.

Citric acid (H3C6H5O7) is in lemons, limes, and oranges.

Potassium hydroxide is used in batteries.

Kichi made a mistake while locating sulfuric acid which is an acid and is used car batteries ,hence it should be found in garage rather than in cosmetics bag.

Acids are defined as substances which on dissociation yield H+ ions , and these substances are sour in taste. Compounds HCl, H₂SO₄ and HNO₃ are acids as they yield H+ ions on dissociation.

According to the number of H+ ions which are generated on dissociation acids are classified as mono-protic , di-protic ,tri-protic and polyprotic  acids  depending on the number of protons which are liberated on dissociation.

Acids are widely used in industries  for  production of fertilizers, detergents  batteries and dyes.They are used in chemical industries for production of chemical compounds like salts which are produced by neutralization reactions.

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Answer:

5 moles of NaCl

Explanation:

Here is the balanced reaction:

2NaOH + BaCl2 -> 2NaCl + Ba(OH)2

1 mole of BaCl2 will produce 2 moles of NaCl

so 2.5 moles of BaCl2 will produce 2.5 x 2 = 5 moles of NaCl

Answer:

9.03 x 10²³formula units

Explanation:

Given;

Molar mass  = 56.08g/mol

Number of moles  = 1.5moles

Unknown:

Number of formula units present = ?

Solution:

To solve this problem, we should note that:

      1 mole of a substance contains 6.02 x 10²³ formula units

     1.5mole of CaO will contain 1.5 x 6.02 x 10²³ formula units

                                                     = 9.03 x 10²³formula units

You need to know the reaction's standard enthalpy change, standard entropy change, and temperature in order to calculate the value of Kp at a specific temperature.

The equilibrium constants for a perfect gaseous mixture are Kp and Kc. When equilibrium concentrations are represented in terms of atmospheric pressure and Kc is the equilibrium constant, Kp is the equilibrium constant utilized.

The equilibrium constant, as defined by the "Law of Chemical Equilibrium," is the ratio of product of product concentration to product of reactant concentration. The stoichiometric coefficient in the balanced chemical equation increases with each concentration term.

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Answer:

555 g of CaCl₂

Explanation:

We'll begin by writing the balanced equation for the reaction. This is given below:

Ca + Cl₂ —> CaCl₂

From the balanced equation above,

1 mole of Cl₂ reacted to produce 1 mole of CaCl₂.

Next, we shall determine the number of mole of CaCl₂ produced by the reaction of 5 moles of Cl₂. This can be obtained as follow:

From the balanced equation above,

1 mole of Cl₂ reacted to produce 1 mole CaCl₂.

Therefore, 5 moles of Cl₂ will also react to produce 5 moles of CaCl₂.

Thus, 5 moles of CaCl₂ were obtained from the reaction.

Finally, we shall determine the mass of 5 moles of CaCl₂. This can be obtained as follow:

Mole of CaCl₂ = 5 moles

Molar mass of CaCl₂ = 40 + (35.5×2)

= 40 + 71

= 111 g/mol

Mass of CaCl₂ =?

Mass = mole × molar mass

Mass of CaCl₂ = 5 × 111

Mass of CaCl₂ = 555 g

Therefore, 555 g of CaCl₂ were obtained from the reaction.

Answer:

unbalanced forces can cause an object to move.

Answer:

Unbalanced Forces

Explanation:

Taking into account the definition of enthalpy of a chemical reaction, the change in enthalpy when 3.24 g of CH₃OH gas is completely reacted is 12.798 kJ.

The enthalpy of a chemical reaction as the heat absorbed or released in a chemical reaction when it occurs at constant pressure.

The enthalpy is an extensive property, that is, it depends on the amount of matter present.

On the other hand, you must take into account:

In this case, the balanced reaction is:

2 CH₃OH(g) → 2 CH₄(g) + O₂(g)

and the enthalpy reaction ∆H° has a value of 252.8 kJ/mol.

Considering the molar mass of CH₃OH is 32 g/mole, this equation indicates that when 2 mole of CH₃OH (or 2 moles× 32 g/mole= 64 grams) reacts, 252.8 kJ of heat is absorbed.

When 3.24 g of CH₃OH are burned, then you can apply the following rule of three: if 64 grams of CH₃OH absorb 252.8 kJ of heat, 3.24 grams of CH₃OH absorb how much heat?

heat= (3.24 grams of CH₃OH× 252.8 kJ)÷ 64 grams of CH₃OH

heat= 12.798 kJ

Finally, the quantity of heat absorbed is 12.798 kJ.

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The sample of nitrogen gas will occupy 236.54 mL of volume at 1.05 atm pressure.

Boyle's law is the ideal law that defines the relationship between pressure and volume of gases. A law is given if the temperature is kept constant. Pressure and volume exhibit an inverse relationship.

The Boyle's Law is given as:

P₁V₁ = P₂V₂

Given,

Initial pressure (P₁) = 0.974 atm

Initial volume (V₁) = 255 mL

Final pressure (P₂) = 1.05 atm

Final volume = V₂

The final volume at 1.05 atm is calculated by substituting values in Boyle's Law as:

P₁V₁ = P₂V₂

0.974 × 255 = 1.05 V₂

V₂ =  248.37 ÷ 1.05

= 236.54 mL

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The ideal gas law may be used to determine the volume of oxygen created in the electrolysis that produces 548 litres of hydrogen at STP (Standard Temperature and Pressure). PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature, according to the ideal gas equation.

The pressure is 1 atm, the temperature is 273 K, and the number of moles of hydrogen is 548/22.4 = 24.5 in this example. We may compute the volume of oxygen created by rearranging the ideal gas law: V = nRT/P = 24.5*0.082*273/1 = 483.3 litres.

As a result, the volume of oxygen created in the electrolysis at STP that produces 548 litres of hydrogen is 483.3 litres.

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The amount of heat lost by the copper is 2402.4 J.

To Calculate the amount of heat lost, we use the formula below.

From the question,

Substitute these values into equation 1.

Hence, The heat lost by the copper is 2402.4 J

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Answer:

????????? i don't speak that language. sorry.

Explanation:

Answer:

Due presence of empty as well as heavy particles.

Explanation:

The main reason for this is the presence of empty spaces as well as heavy particles in the nucleus of Helium atom. Most of the beam pass through the helium atom due to the presence of empty spaces in the atom whereas some beams deflect from the helium atom because both repel each other due to same charge i.e. positive charge. Few beams of light bounce back with an angle of 90 degree due hitting with the nucleus where heavy particles such as neutron and proton are present.

The learning activities titled "Hypothesis," "Variables and Hypothesis," and "Constructing a Hypothesis" all share certain similarities and differences. A question that arises in response to an observation is similar to a scientific research question in that both require some level of investigation to achieve an answer. However, scientific research questions are typically more specific and refined, with a defined methodology for obtaining data and verifying results.

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Answer:

The first and most obvious pattern I see is that all gas giants have an atmosphere mainly made up of hydrogen

The second thing I notice is that all the rocky planets have a significant amount of Nitrogen in their atmospheres except Mercury.

The third thing I notice is that all planets have one element that makes up 75% or more of its atmosphere except Mercury.

(If this is good, may I have brainliest, please? I'm kinda poor..)

Answer:

It's hard to find patterns in the solar system's atmosphere but I think above found a lot of them.

Answer:

1551.45 MmHg

hope this helps :D

pKa value =4.76Ka

=1.73×10 −5 !!    PH=4−PKa=14−4.76=9.24 for a weak monoprotic acid is titrated with 0.100 M NaOH. It requires 50.0 mL of the NaOH solution to reach the equivalence point. After 25.0 mL of the base is added, the pH of the solution is 3.52.

One way to describe an acid's potency is by its pKa value. The acid dissociation constant, or pKa, is the negative log of the pKa value. A stronger acid is indicated by a lower pKa value. In other words, a lower value means that the acid dissociates in water more completely.

The logarithm of Ka's negative value is denoted as pKa. The logarithmic inverse of the H+ concentration is pH. Acidity indication. An acid's pKa value tells you if it's a strong acid or a weak acid. The pH scale shows how acidic or alkaline a system is.

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Answer:

b) warm

Explanation:

A warm weather front forms when a warm air mass pushes into a cooler air mass. Therefore, the answer is b) warm.

I'm sorry to bother you but can you please mark me BRAINLEIST if this ans is helpfull

Explanation:

Introducción:

La designación de los compuestos orgánicos puede hacerse utulizando alguno de los

siguientes sistemas:

a) Mediante nombres triviales o comunes, que expresen alguna propiedad característica

(sabor, color, acción fisiológica, etc.) o hagan referencia a la materia de la cual se extrajo el

compuesto.

b) Mediante nombres racionales que proporcionen una idea de su constitucion química y

destaquen sus analogías estructurales.

La necesidad de una nomenclatura sistemática, que expresara en forma clara, conforme

a normas precisas, el nombre y la estructura de los compuestos orgánicos, ha sido motivo de

preocupación permanente y observada a través de los numerosos congresos internacionales

que, al efecto, se han realizado en diversas oportunidades.

Las bases del actual sistema de nomenclatura fueron establecidas por una comisión que

se reunió en Ginebra en 1892. Posteriormente, fue perfeccionado y ampliado por el Comité de

Nomenclatura de la Unión Internacional de Química Pura y Aplicada, por lo que se conoce

como sistema I.U.P.A.C. (International Union of Pure and Applied Chemistry).

En las reglas aprobadas se ha tratado de introducir los menores cambios posibles a la

terminología universalmente adoptada. El sistema tiene la necesaria flexibilidad como para

adaptar la forma precisa de las palabras, de las terminaciones, etc. a las características de

distintos idiomas.

El nombre de los hidrocarburos consta de tres partes: a) la raíz, que indica el esqueleto

carbonado; b) la terminación o sufijo, que indica el grado de saturación, y c) el prefijo que

diferencia las distintas estructuras isoméricas (distintas estructuras construidas con exactamente

los mismos átomos).

Ej.: CH3-CH2-CH2-CH2-CH3 pentano (tambien llamado n-pentano)

penta: raíz que señala el número de átomos de carbono que componen la cadena principal

del compuesto.

-ano: sufijo que indica que el hidrocarburo es saturado

Answer:

c

Explanation:

kilometers are too long, millimeters and centimeters are too short

The most appropriate unit to use is option (c) meters

A measuring unit is a standard quantity used to express a physical quantity.

So the appropriate unit to measure large redwood tree which is 100 unit will be meters

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We need 1 mole of Ca(OH)2 for every 2 moles of HCl since Ca(OH)2 is a need for every 2 moles of HCl. Because HCl is in excess and Ca(OH)2 is the limiting reactant in this reaction, 2.0 moles of H2O should theoretically be created.

The stoichiometric coefficients can be used to calculate the excess reagent. Calcium hydroxide and HCl have stoichiometric coefficients of 1 and 2, respectively. Thus, HCl is the reaction's limiting reagent.

The redox reaction Ca+2H2OCa(OH)2+H2 is an illustration of this.

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The missing coefficients in the above balanced chemical equation are as follows: 1, 1, 1.

A chemical equation is a symbolic representation of a chemical reaction where reactants are represented on the left, and products on the right.

A chemical equation is said to be balanced when the number of atoms of each element on both sides of the equation are the same.

According to this question, zinc sulphide reacts with hydrogen chloride to produce zinc chloride and hydrogen sulphide as follows:

_ZnS +2HCl → ___ZnCl₂ + ___H₂S

The balanced equation is as follows:

ZnS +2HCl → ZnCl₂ + H₂S

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Answer:

O2

Explanation:

for find the limiting reactant you must calculate the moles of the reactants from the amount that you have and from the MM:

MM FeS2 = 120n  = 26.2g / 120g/mol = 0,218 mol

MM O2  = 32n = 5,44g/32g/mol = 0,17 mol

The limiting reactant is  

O2

Answer:

I believe it is the Ethiopian ibex

Explanation:

Answer:

I think it the Ethiopian ibex

Explanation:

im srry if it wrong.

hope this helps tho

Answer:

nonmtals:

Uses of nonmetals in our daily life: Oxygen which is 21% by volume helps in the respiration process. It is also used for manufacturing of steel and provides high temperature in metal fabrication process. ...

Nonmetals used in fertilizers: Fertilizers contain nitrogen. It helps in plant growth. ...

Nonmetals used in crackers

Non-Malleable and Ductile: Non-metals are very brittle, and cannot be rolled into wires or pounded into sheets. Conduction: They are poor conductors of heat and electricity. Seven non-metals exist under standard conditions as diatomic molecules: H2(g)

Explanation:

Answer:

the answer is  c.

Explanation:

The number of moles of sodium chloride present in 0.5 L of 4 Molar NaCl(aq) is  2 moles. The correct option is a.

Moles are the quantity or amount of any substance. It is a measurement quantity.

The concentration of NaCl is 4 molar

The volume of the solution is 0.5 L is given.

To calculate the number of moles, we use the formula of molarity, in which moles are divided by the volume of the given solution. The formula is:

Molarity = moles/ volume

4 M = moles / 0.5 L

Putting the values in the given formula:

Moles = 4 x 0.5 L = 2 moles

Thus, the correct option is a. 2 moles is the number of moles of sodium chloride.

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