The specific heats at constant pressure of some common gases are provided as a thirdorder polynomial: �;<<< = � + �� + ��C + ��E, with units J/(mol K). For methane (CH4) the coefficients are � = 19.89, � = 5.024 × 10NC, � = 1.269 × 10NO, � = −11.01 × 10NQ. At a production facility, the gas in a 50-liter tank is compressed to 3,600 psi (gage) during which time the temperature rises to 200°F. How much heat in J is given off as the gas cools to room temperature? Suppose the compressed gas is helium, how much heat would be given off in this case?

Answer:

Explanation:

mass of the solution = volume x density = 200 x 1 = 200 gm

heat absorbed = m x s x Δ t , s is specific heat , Δt is rise in temperature

= 200 x 4.18 x ( 31.3 - 24.6 )

= 5601 J .

This is the enthalpy change required.

Answer:

Perception is the psychological process in which sensory input is organized and interpreted into meaningful information. The sensory and perceptual processes work together so that organisms can make sense out of objects or events that appear in their environment. For example, when looking at a cat, one senses a combination of shapes and colors. The mind instantly processes these visual sensations into something meaningful, letting one know it's a cat.

Explanation:

^^

Answer:

Perception is the psychological process in which sensory input is organized and interpreted into meaningful information. The sensory and perceptual processes work together so that organisms can make sense out of objects or events that appear in their environment. For example, when looking at a cat, one senses a combination of shapes and colors. The mind instantly processes these visual sensations into something meaningful, letting one know it's a cat.

Explanation:

Edge 2021

Answer:

It is A.

Explanation:

I hope this helps have a great day.

Answer:

A

Explanation:

an individual that produces sperm and an individual that produces eggs

you need egg and sperm for a new offspring aka a zygote

Answer:

There are

Explanation:

There are 10 elements in CH3CH2COONa.

If a student is in class 400 minutes every day for 5 days each week, then there would be 120000 seconds, therefore the correct answer is option A.

Finding the product of two or more numbers in mathematics is done by multiplying the numbers. It is one of the fundamental operations in mathematics that we perform on a daily basis.

As given in the problem If a student is in class 400 minutes every day for 5 days each week,

The number of minutes a student in class in a day = 400 minutes

The number of seconds a student in class in a day = 400 × 60 seconds

The  number of seconds a student in class in a week  = 400 × 60 × 5 seconds

The number of seconds a student in class in a week  = 120000 seconds

Thus, the correct answer is option A.

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Answer:

Not to be rude but its in there. Hope this helps

Explanation:

Chemical weathering changes the molecular structure of rocks and soil. For instance, carbon dioxide from the air or soil sometimes combines with water in a process called carbonation. This produces a weak acid, called carbonic acid, that can dissolve rock.

Answer:

65.72 g

Explanation:

mass = density × volume

= 1.02 g/ml × 62 ml

= 65.72 g

Answer: carbon dioxide and water.

Explanation: I took the test

Answer:

water and carbon dioxide

Explanation:

i took the K12 test :p

Answer:

2.65 M

Explanation:

Convert grams of K₂CO₃ to moles.  The molar mass is 138.205 g/mol.

(110 g)/(138.205 g/mol) = 0.796 mol

Convert milliliters of solution to liters.

300 mL = 0.300 L

Divide moles of K₂CO₃ by liters of solution.

0.796 mol/0.300 L = 2.65 mol/L = 0.265 M

Answer:

2.7 M

Explanation:

M=moles of solute/volume of solution (L)

First, you need to calculate the number of moles using the given mass and the molar mass.

110 g138.205 g/mol=0.80 mol

Then, you can solve for molarity using the molarity equation.

M=0.80 mol0.300 L=2.7 M

Remember, you need to convert mL to L before you can calculate molarity.

Answer:

Explanation:

Given that:

mass of chlorine gas = 120.0 g

the molar mass of Cl₂ = 70.9 g/mol

The number of moles of chlorine gas = mass/molar mass

The number of moles of chlorine gas = 120.0 g / 70.9 g/mol

The number of moles of chlorine gas = 1.69 mol

Pressure = [tex]5.70 \times 10^5 \ Pa[/tex]

Temperature = 19.0°C = (273 + 76) K = 349 K

Universal Gas constant R = 8.314 J/mol/K

Using Ideal gas equation:

PV = nRT

V = nRT/P

V = (1.69 × 8.314 × 349)/ [tex]5.70 \times 10^5[/tex]

V = 4903.68034/ [tex]5.70 \times 10^5[/tex]

V = 0.008603 m³

Thus, the volume V of the tank =  0.008603 m³

For diatomic gas, the internal energy can be calculated by using the formula:

internal energy [tex]E_{int}[/tex] = [tex]\dfrac{5}{2} \times nRT[/tex]

internal energy [tex]E_{int}[/tex] = [tex]\dfrac{5}{2} \times 1.69 \times 8.314 \times 349[/tex]

internal energy [tex]E_{int}[/tex] = 12259.2 J

If there is a temperature and pressure drop;

the new temperature = 31.0°C = (273 + 31) K = 304 K

the new pressure = [tex]3.80 \times 10^5 \ Pa[/tex]

We need to understand that the aftermath of the reduction in chlorine gas resulted in a decrease in temperature and pressure. Since nothing is affecting the volume of the chlorine gas, then there is no work done.

Thus, work done will be zero because there is no change in the volume or an isochoric process.

Answer:

synthesis

Explanation:

The reaction given is a synthesis reaction or combination reaction.

Given equation:

                        NH₃  +  HCl   →   NH₄Cl

In a synthesis reaction, a single product is formed from two or more reactants

                          A + B →  C

The formation of compounds from the union of constituent elements also falls into this category.

So the given reaction is a synthesis reaction.

In a decomposition reaction two or more products are formed from a single reactant

In a single replacement reaction, one substance replaces another.

In double replacement reactions partners in a chemical specie are exchanged.

Therefore the given reaction is a synthesis reaction

Answer:

D

Explanation:

It only has one valence electron.

Answer:

The suitable equation for this reaction is

2CO + O₂ -----> 2CO₂

Here, we are given that we have 2 grams of O₂

From the equation, we can see that 2 * Moles of O₂ = Moles of CO₂

Moles of O₂:

2/32 = 1/16 moles

Therefore, the number of moles of CO₂ is twice the moles of O₂

Moles of CO₂ = 2 * 1/16

Moles of CO₂  formed = 1/8 moles

Mass of CO₂  formed = Molar mass of CO₂ * Moles of CO₂

Mass of CO₂  formed = 44 * 1/8

Mass of CO₂  formed = 5.5 grams

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Answer:B and C

Explanation:did the assignment

Answer:

The polar heads interact with water; the nonpolar tails do not

Explanation:

A phospholipid contains an ionic head that contains the phosphate group and the nonpolar or hydrophilic tail that is comprised of the alkyl moeity in the phospholipid.

The hydrophilic ionic head can interact with water, while the hydrophilic alkyl tail do not interact with water, hence the answer above.

Answer:

Sample Response: Viscosity refers to a liquid’s resistance to flow. Liquids with a higher viscosity flow more slowly. In liquids that are more viscous, there is a stronger attraction between atoms.

Explanation:

it's the sample response so it's correct lol, I hope it helps.  

Answer:

Sample Response: Viscosity refers to a liquid’s resistance to flow. Liquids with a higher viscosity flow more slowly. In liquids that are more viscous, there is a stronger attraction between atoms.

Explanation:

Edge 2021

Physics

Answer:

Titration of 50.00 mL of 0.0521 M sodium oxalate, Na2C2O4, required 38.71 mL of a potassium permanganate solution: 5 C2O42- + 2MnO4- + 16H+ = 2Mn2+ + 10 CO2 + 8H2O Calculate the molarity of the potassium permanganate solution.

Explanation:

If m and n are integers, which of the following must be an even integer? A. 2mn B. mn C. mn+2 d. mn-2 e. 3mn

Answer:

A

Explanation:

Apex

The arrangement of atoms in a molecule is described by the VSEPR theory.

An atom is defined as the smallest unit of matter which forms an element. Every form of matter whether solid,liquid , gas consists of atoms . Each atom has a nucleus which is composed of protons and neutrons and shells in which the electrons revolve.

The protons are positively charged and neutrons are neutral and hence the nucleus is positively charged. The electrons which revolve around the nucleus are negatively charged and hence the atom as a whole is neutral and stable due to presence of oppositely charged particles.

Atoms of the same element are similar as they have number of sub- atomic particles which on combination do not alter the chemical properties of the substances.

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Answer:

The notation of configuration of Co is [tex][Ar] 3d^7 4s^2[/tex]

(A) is correct option.

Explanation:

Given that,

The following notations is the correct noble gas configuration for  Co.

(A). [Ar] 3d⁷ 4s²

(B). [Ar] 4s² 4p⁶ 3d

(C). [Kr] 4s² 4p⁶ 4d

(D). [Co] 3d⁷ 4s²

We know that,

Cobalt :

Co is the symbol of cobalt which is a chemical element.

Atomic number of Co is 27.

We need to find the notation of the configuration of  noble gas Co

Using configuration

[tex]Co_{27}=2, 8, 15, 2[/tex]

[tex]Co_{27}=1s^2, 2s^2,2p^6, 3s^2 3p^6 3d^7, 4s^2[/tex]

So, we can write as the notation of noble gas configuration

[tex]Co_{27}=[Ar] 3d^7 4s^2[/tex]

Hence, The notation of configuration of Co is [tex][Ar] 3d^7 4s^2[/tex]

(A) is correct option.

Answer:

Scientific laws or laws of science are statements, based on repeated experiments or observations, that describe or predict a range of natural phenomena. The term law has diverse usage in many cases across all fields of natural science. 

Answer:

We are given:

V(i) = 0.3 L                          V(f) = 0.36 L

P(i) = x pa                            P(f) = 400 pa

T(i) = T(f) = 293 k

Using the gas formula:

PV = nRT

Since n , R and T are constant,

PV = k  (where k is a constant)

Hence we can say that:

P(i) * V(i) = P(f) * V(f)

x * 0.3 = 0.36 * 400

x = 14.4/0.3

x = 480 pascals

Hence the initial pressure is 480 pascals

Converting to Kpa, we have to divide by 1000

Initial pressure (Kpa) = 0.48

Answer: Balloons taken outside on a cold day will shrink because, as the temperature decreases, the pressure and volume decrease also.

Explanation: