Determine the pressure change when a constant volume of gas at 2.50 atm is heated from 30.0 °C to 40.0 °C.

Answers

Answer 1

Answer:

Answer:

The pressure changes from 2.50 atm to 2.58 atm (an increase of approximately 0.08 atm) when the gas is heated from 30.0°C to 40.0°C.

Explanation:

As the given volume of gas is constant, we can use Gay-Lussac's law to solve this problem as it relates pressure to temperature.

Gay-Lussac's law

$\boxed{\sf (P_1)/(T_1)=(P_2)/(T_2)}$

where:

P₁ = Initial pressure
T₁ = Initial temperature (in kelvins)
P₂ = Final pressure
T₂ = Final temperature (in kelvins)

First, we need to convert the given temperatures from Celsius to Kelvin by adding 273.15:

$\implies \sf T_1=30+273.15=303.15\;K$

$\implies \sf T_2=40+273.15=313.15\;K$

Therefore, the values to substitute into the equation are:

P₁ = 2.50 atm
T₁ = 303.15 K
T₂ = 313.15 K

As we are solving for the final pressure, rearrange the equation to isolate P₂:

$\sf P_2=(P_1T_2)/(T_1)$

Substitute the values into the equation and solve forP₂:

$\implies \sf P_2=(2.50 \cdot 313.15)/(303.15)$

$\implies \sf P_2=(782.875)/(303.15)$

$\implies \sf P_2=2.58246742...$

$\implies \sf P_2=2.58\;atm\;(3\;s.f.)$

Therefore, the pressure changes from 2.50 atm to 2.58 atm (an increase of approximately 0.08 atm) when the gas is heated from 30.0°C to 40.0°C.

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What is the value of 100 ºC on the Kelvin scale? 100 K

Answers

Answer : The temperature on the Kelvin scale is, 373 K

Solution :

As temperature is given $100^oC$ . Now we have to determine the temperature in Kelvin scale.

Formula used :

$K=273+^oC$

K = temperature in kelvin = ?

$^oC$ = temperature in degree Celsius = $100^oC$

Now put the value of 'K' in the above formula, we get the temperature in kelvin scale.

$K=273+100\n\nK=373$

Therefore, the temperature on the Kelvin scale is, 373 K

0 C = 273 K . . . . 100 C = 373 K

The questions refer to the following graphs of mechanical waves. A
B
C

The wave with the longest wavelength is (A,B,C). The wave with the smallest amplitude is (A,B,C). The wave with the most energy is (A,B,C).

Answers

A is the wave with the longest wavelength. The graph clearly shows this since wave A has a larger wavelength than waves B and C. Wave A has the longest wavelength when compared to the other two waves.

What is the C wave ?

C is the wave with the least amplitude. The graph shows this since wave C has a significantly lesser amplitude than waves A and B. Wave C has the least amplitude when compared to the other two waves. B is the most energetic wave.

The graph shows this because wave B has a larger amplitude than waves A and C. Wave B has the greatest amplitude when compared to the other two has the more energy in comparison to the two.

The longest wavelength wave has the lowest frequency and the lowest energy. A wave's wavelength is inversely related to its frequency, which implies that as the wavelength grows, so does the frequency. Because energy is proportional to frequency, the wave with the longest wavelength has the least energy.

The wave with the smallest amplitude has the least amount of energy. The largest displacement of a wave from its equilibrium position is referred to as its amplitude. The energy of a wave is exactly proportional to its amplitude, therefore as the amplitude falls, so does the energy.

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Do you have pictures of the graphs??

Which is true about models in science?A-Models are accurate enough for the phenomena they represent.
B-Models only present macroscopic versions of the submicroscopic.
C-Models help explain phenomena but are not good for predicting events.
D-Models are used throughout science although they are not always accurate.

Answers

D-Models are used throughout science although they are not always accurate.

I think c is the answer but I could be wrong..

what volume of .123 m naoh, in milliliters, contains 25.0 g of naoh? (density of the solution is 1.05 g / ml)

Answers

Answer:

8.46 liters of 0.123 NaOH contains 25.0 grams of NaOH.

Explanation:

Molar is defined as Moles/Liter. 0.123 M means there is 0.123 moles of NaOH per 1 liter. We are asked to determine how many milliliters of this concentration NaOH it would take to deliver 25.0 grams of NaOH.

Use the units to guide the calculation.

Remember that: Concentration x Volume = Moles

(0.123 moles/liter)*(V) = moles

We want 25.0 grams of NaOH. Let's convert that to moles using the molar mass of NaOH:

(25.0 grams NaOH)/(24.0 g/mole) = 1.04 moles NaOH.

Now we can write:

(0.123 moles/liter)*(V) = 1.04 moles NaOH

V = (1.04/0.123) Liters

V = 8.46 liters

Intermolecular forces are a. forces within covalent molecules that hold them together b. electrostatic forces between ions c. bonds between hydrogen and oxygen atoms in water molecules d. attractive forces between separate covalent molecules e. covalent bonds within a network solid

Answers

The correct option is d. attractive forces between different covalent molecules are the right response.

Intermolecular forces (IMFs) are attractive interactions between separate covalent molecules. These forces arise due to temporary imbalances in electron distribution, leading to regions of partial charge within molecules. Unlike covalent bonds that hold atoms within a molecule together, IMFs act between different molecules.

This includes forces like London dispersion forces (arising from temporary fluctuations in electron distribution), dipole-dipole interactions (between polar molecules with permanent dipoles), and hydrogen bonding (a special type of dipole-dipole interaction involving hydrogen bonded to electronegative atoms like oxygen, nitrogen, or fluorine). IMFs influence properties like boiling points, solubility, and phase changes. They're crucial in understanding the behavior of liquids and solids, particularly in cases involving non-metallic compounds.

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The correct answer is: d. attractive forces between separate covalent molecules

Intermolecular forces are the forces of attraction that exist between molecules, rather than within molecules (intramolecular forces). These forces play a crucial role in determining the physical properties of substances, such as boiling points, melting points, and solubility. The options a, b, c, and e are not correct descriptions of intermolecular forces:

a. Forces within covalent molecules that hold them together refer to intramolecular forces, such as covalent bonds, which involve the sharing of electrons between atoms within a molecule.

b. Electrostatic forces between ions are ionic bonds, which involve the transfer of electrons from one atom to another, leading to the formation of positively and negatively charged ions. This is not an example of intermolecular forces.

c. Bonds between hydrogen and oxygen atoms in water molecules refer to hydrogen bonds, which are a specific type of intermolecular force. However, this option does not encompass all types of intermolecular forces.

e. Covalent bonds within a network solid are intramolecular forces that hold the atoms together in a three-dimensional lattice, as seen in substances like diamond or quartz. This is not representative of intermolecular forces.

Therefore, the correct option is d, which correctly describes intermolecular forces as attractive forces between separate covalent molecules. These forces can include London dispersion forces (Van der Waals forces), dipole-dipole interactions, and hydrogen bonding, among others.

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What sample size (grams) of Na3PO4 (FW 164.00) known to be 50.00% pure should be used to consume exactly 40.00 mL of 0.1000 M HCl to reach the 2nd end point