Need Help ASAP- Chemistry

A temperature change in a reaction indicates a chemical change

A temperature change in a reaction indicates occurrence of chemical change.

In chemistry, two types of reaction are always witnessed. One is physical reaction whereas the other is chemical reaction. In a chemical reaction, there is an adjustment in the organization of the substances whereas in a physical change there is a distinction in the appearance, smell, or straightforward showcase of an example of issue without an adjustment in structure.

At the point when bonds are broken and new ones are shaped, a compound change happens. The following happenings indicate the chemical change:

A gas deviates most from the ideal gas law at low temperatures and high pressures due to the increased significance of molecule volume and intermolecular attractions.

A gas will be least likely to exhibit the ideal gas properties predicted by the ideal gas law under conditions of low temperatures and very high pressures. At high pressures, gas molecules are forced closer together, which means they occupy a more significant volume relative to the space they are in, challenging the assumption that their volume is negligible. At low temperatures, the decreased kinetic energy of the gas particles means that intermolecular attractions become more significant, further deviating from ideal behavior.

Answer:

the reaction with the hydrochloric acid and the sodium hydroxide gives you HCl + NaOH which gives you H2O + NaCl.

Explanation:

Balance the chemical equation. Balancing the neutralization reaction involves the process of making sure that there is an equal number of moles of each of the elements on both sides of the equation.

Final answer:

The correct statement is that in a concentration cell, the reactions are the same but the concentrations are different, which results in a cell potential greater than 0.00 volts until equilibration.

Explanation:

The correct statement about concentration cells is: The concentrations are different and the reactions are the same, so the cell potential is not 0.00 volts. Essentially, concentration cells consist of two half-cells with identical electrodes and the same redox active species at different concentrations. The standard electrode potential (E°) in a concentration cell is zero because the electrodes are identical; however, there is a potential difference, calculated with the Nernst Equation, due to varying concentrations. As the reaction in a concentration cell proceeds, the concentrations equilibrate and the cell potential (ΔEcell) decreases until the concentrations become equal and ΔEcell reaches zero.

Answer:

Matter is something that is made of atoms like a liquid, solid, or gas and energy is when water becomes a gas and the energy starts to get faster to where there is steam because the gas is being trapped inside the pot or any other object.

Explanation:

A 1.00-ounce bottle holds approximately 0.0295 liters of liquid, by converting ounces to quarts (1.00 ounce / 32 ounces), and then quarts to liters (the resulting number of quarts / 1.06).

Given that there are 32 ounces in 1 quart and 1.06 quarts in 1 liter, we can first convert ounces to quarts, and then quarts to liters. So, if we have 1.00 ounce, we simply divide this number by 32 to get the equivalent in quarts. The answer is about 0.03125 quarts. Then, we convert quarts to liters by dividing the number of quarts obtained by 1.06, yielding approximately 0.0295 liters.

Thus, a 1.00-ounce bottle would hold about 0.0295 liters of liquid.

https://brainly.com/question/34663568

#SPJ3

Answer:

=1.36kg

Explanation:

First heat is absorbed to melt the ice- latent heat of fusion of ice then heat is absorbed to raise the temperature to 373K

The specific heat capacity of water is 4.187kJ/kg/K while  the latent heat of fusion of ice is 2230kJ/kg/K.

Letting the mass of the ice to be =x

x×2230kJ/kg/K + x×4.187kJ/kg/K×100K= 3600kJ

2230x+418.7x=3600

2647.8x=3600

x=1.36 kg

Answer:

2.5 moles of O₂

Explanation:

2RbNO₃⇒2RbNO₂+O₂-------------The equation is balanced

Mole ratio for the equation

2RbNO₃⇒2RbNO₂+O₂

2                2              1

RbNO₃:O

2:1---------------------------------------For every mole of oxygen produced ,two moles of RbNO₃ are required

Given

5 moles of RbNO₃  will produce ? moles of oxygen

2 moles of RbNO₃=1 mole of oxygen

5 moles of RbNO₃=?

=(5×1)/2 = 2.5 moles

Answer:

Here's what I get.

Explanation:

Two factors:

1. Higher accelerating voltages

Both types use a beam of accelerated electrons as a source of illumination.

Resolution depends on the wavelength of the electron beam. The shorter the wavelength, the smaller the objects you can "see."

SEMs usually use acceleration voltages up to 30 kV, while TEMs can set them as high 300 kV. Thus, the electron wavelengths in TEMs are shorter by a factor of 10.

2. Less spherical aberration

Spherical aberration degrades the quality of the image. It decreases as wavelength decreases, so you can push the magnification higher with a TEM without losing image quality.

Answer:

idfk

Explanation:

Answer: C EXOTHERMIC

Explanation:

Answer: C

Explanation:

Answer:

It has a different value at different temperatures.

Explanation:

For any system in equilibrium, the molar concentration of all the species on the right hand side are related to the molar concentrations of those at the left side by a constant known as the equilibrium constant.

The equilibrium is a constant at a given temperature as it is temperature dependent.

A change in temperature of an equilibrium system shifts the system to a new equilibrium point. A rise in temperature actually shifts equilibrium position to the direction that absorbs heat and vice versa.

The shift in equilibrium as a result of temperature change is actually a change in the value of the equilibrium constant. Equilibrium constant is represented as [tex]K_{eq}[/tex]

The derivation of the equilibrium constant is based on the Law of Mass Action which states: the rate of a chemical reaction is proportional to the product of the concentrations of the reacting substances.

Answer:

It has a different value at different temperatures.

Explanation:

I took the test, and this answer was correct

Answer:

Water

Explanation:

Strong electrolytes will completely ionize in water, and water cannot do that to itself.

which is not a strong electrolyte?

water

Answer:

See below.

Explanation:

Chlorine gas replaces the bromine in  potassium bromide to form potassium chloride and bromine liquid is released.

The equation for the reaction is:

Cl2 (g) + 2KBr (s) = KCl  (s) + Br2 (l).

This reaction occurs because chlorine is more reactive then bromine.

Answer:

grease fire. The others are solids that will easily be put out with water.

Answer:

grease fire

Explanation:

DOING THAT WILL JUST MAKE IT WORSE

hope it helps

Answer:

the answer is

n = 0.01336 mol

Explanation:

To determine the number of moles of a gas, we need to have an expression that relates the pressure, temperature and volume of the system. For simplification, we assume that this gas is ideal so we use the equation PV=nRT. We calculate as follows:

PV=nRT

n = PV / RT

n = 235000(1.48x10^-4) / (8.314)(40+273.15)

n = 0.01336 mol

Answer : The correct option is, (B) [tex]1.34\times 10^2mol[/tex]

Explanation :

To calculate the moles of nitrogen gas we are using ideal gas equation:

[tex]PV=nRT[/tex]

where,

P = pressure of nitrogen gas = 235 kPa = 2.319 atm

Conversion used : (1 atm = 101.325 kPa)

V = volume of nitrogen gas = [tex]148cm^3=148mL=0.148L[/tex]

Conversion used : (1 L= 1000 mL)

T = temperature of nitrogen gas = [tex]40.0^oC=273+40.0=313K[/tex]

R = gas constant = 0.0821 L.atm/mole.K

n = moles of nitrogen gas = ?

Now put all the given values in the ideal gas equation, we get:

[tex](2.319atm)\times (0.148L)=n\times (0.0821L.atm/mole.K)\times (313K)[/tex]

[tex]n=0.0134mol=1.34\times 10^2mol[/tex]

Therefore, the number of moles of nitrogen gas are, [tex]1.34\times 10^2mol[/tex]

the very bottom of the ocean and they are relevant by most of the animals feed off of the animals that come out of he vents

Nonrenewable resources are those found inside the earth, and they took millions of years to form. These include the fossil fuels, oil, natural gas, and coal and nuclear energy

Answer:

Ionic Bonding: The formation of an Ionic bond is the result of the transfer of one or more electrons from a metal onto a non-metal.

Covalent Bonding: Bonding between non-metals consists of two electrons shared between two atoms.

Explanation:

Answer: Each ion is surrounded by water molecules

Explanation: The ions are surround by the water molecules which act as a barrier around the ions and prevent the recombination of ions. The ions are said to be hydrated.

Answer:

Each ion is surrounded by water molecules.

Explanation:

During dissolution of ionic solute in water the following process occur

a) Breaking of molecule into separate ions (need lattice energy)

b) hydration of each ion by water molecules (hydration energy is released)

c) due to hydration the ions of solutes further become far from each other.

There is no breaking of water molecule or the ions do not combine to form molecule.

Because the model makes the concepts easier to understand.

Answer:

A. because the model makes the concepts easier to understand

Edge.2023

Explanation:

<3

Answer:No charge

Explanation:

Cu3PO4 is an ionic compound which my definition has no charge (or a charge of 0). But if you are referring to the ions themselves that make up the compound, PO4 is a polyatomic ion so you can look up its charge in a polyatomic ion chart (it is 3-). Thus since there are 3 Cu's per PO4^3-, each Cu must have a charge of 1+.

The charge of Cu3PO4 is neutral, and each Cu ion in the molecule carries a +1 charge to balance the -3 charge from the phosphate ion.

The compound Cu3PO4 is made up of Cu (Copper) and PO4 (Phosphate) ions. When these ions bind to form an ionic compound such as Cu3PO4, the total charge of the compound should be neutral.

The charge of Cu3(PO4)2 is +2.

In this case, phosphate has a charge of -3, and for the molecule to be neutral, the total charge from the 3 Copper ions must be +3, making the charge of each Cu (Copper) ion as +1.

https://brainly.com/question/33500527

#SPJ2

Answer:

The right choice is "nuclear power "

Explanation:

Human activities like burning coal for warming or for using in industries, heat our homes with oil, or switching on our natural gas stoves for cooking produce carbon dioxide gas and other gases (i.e. greenhouse gas) responsible for global warming .

while, nuclear power doesn't contribute to the universe with any of this greenhouse gas

So, the right choice is "nuclear power "

Answer:

Explanation:

The given reaction equation is:

                2A + 4B → C + 3D

We know the mass of compound A in the reaction above. We are to find the mass of compound D.

We simply work from the known mass to calculate the mass of the unkown compound D

Using the mole concept, we can find the unknown mass.

Procedures

            Number of moles of A = [tex]\frac{mass of A}{molar mass of A}[/tex]

           From the balanced equation of the reaction, it is shown that:

         2 moles of compound A was used up to produced 3 moles of D

  Then [tex]\frac{3}{2}[/tex] x number of moles of A would give the number of moles of D

             Mass of D = number of moles of D x molar mass of D

Answer:

The reaction will be spontaneous.

Explanation:

If ΔG is negative, the reaction is spontaneous.  

If ΔG = zero, the reaction is at equilibrium.

If ΔG is positive, the reaction is non-spontaneous.

Answer: The Answer is Yes! at least on odyssey ware

Explanation: I Know this is right because I was right and got a solid 100% on it. So there is the answer for yall legends!

Answer:

Cross-pollination

Explanation:

This technique is used to create new varieties, usually with stronger characteristics than the two original varieties. When the pollen of one variety is placed to a different plant's stigma, the resulting seeds create a new variety. This cross-pollination is used in plants of the same species.  

Answer:

Crossbreeding

Explanation:

apex

the second law of thermodynamics

Answer: It's the first one,

Answer:

237.2 mL.

Explanation:

(XMV) acid = (XMV) base.

where, X is the no. of (H) or (OH) reproducible in acid or base, respectively.

M is the molarity of the acid or base.

V is the volume of the acid or base.

(XMV) HCl = (XMV) NaOH.

For HCl; X = 1, M = 0.5 M, V = ??? mL.

For NaOH, X = 1, M = 1.54 M, V = 77.0 mL.

∴ V of HCl = (XMV) NaOH / (XV) HCl = (1)(1.54 M)(77.0 mL) / (1)(0.5 M) = 237.2 mL.

The answer is:

The new temperature of the gas is equal to 388.22 K

Since we have a rigid container, we can safely assume that the volume is kept constant.

To solve the problem, we need to use the Gay Lussac's Law, which states that the pressure and the volume of an ideal gas are proportional  when the volume is kept constant.

Also, we need to remember that Gay Lussac's Law works with absolute temperature, so, we need to convert the given temperature (in celsius degrees) to Kelvin.

[tex]T(K)=273.15 + T(\°C)\\\\T(K)=273.15 +25=298.15K[/tex]

So, using the Gay Lussac's equation, we have:

[tex]\frac{P_1}{T_1}=\frac{P_2}{T_2}[/tex]

Where,

[tex]P_1[/tex] is equal to the first pressure.

[tex]T_1[/tex] is equal to the first temperature.

[tex]P_2[/tex] is equal to the new pressure.

[tex]T_2[/tex] is equal to the new temperature.

We are given the following information:

[tex]P_1=0.96atm[/tex]

[tex]T_1=298.15K[/tex]

[tex]P_2=1.25atm[/tex]

Then, substituting and calculating, we have:

[tex]T_2=P_2*\frac{T_1}{P_1}\\\\T_2=1.25atm*\frac{298.15K}{0.96atm}=388.22K[/tex]

Hence, the new temperature of the gas is equal to 388.22 K.

Have a nice day!

Answer: the person up there had the correct answers so far, but didn’t complete it, but after converting it , finish it .

temperature in celcius - 388 K - 273 = 115 °C

answer is C. 115 °C

Answer:

1.  C. helium

2.  D. oxygen and acetylene

3.  B.  deliquescence

4.  C.  cutting very hard surfaces

5.  B.  3.5%

Explanation: