Compare a mixture and a compound. How are they alike?
Contrast a mixture and a compound. How are they different

1.  We can see here that energy is required to change the phase of matter. For example, energy is required to melt ice, vaporize water, and condense steam. The amount of energy required to change the phase of matter is called the latent heat.

Energy is a fundamental concept in physics and refers to the ability or capacity of a system to do work or produce a change.

2. The demonstration on the sample of water showed that water can exist in three phases: solid, liquid, and gas. The solid phase is ice, the liquid phase is water, and the gas phase is steam.

The demonstration started with ice at 0°C. As heat was added to the ice, the temperature of the ice increased. However, the ice did not melt until the temperature reached 0°C. This is because the energy from the heat was used to break the bonds between the water molecules in the ice. Once the bonds were broken, the ice melted and became water.

3. Completing the

Page 4:

Heating and cooling curves are graphical representations of how temperature changes during the process of heating or cooling a substance. They illustrate the relationship between temperature and the state of matter.

Both curves show:

Learn more about energy on https://brainly.com/question/2003548

#SPJ1

Answer: When the concentration of HI is tripled then the rate increases by a factor of 9.

Explanation:

The rate of a chemical reaction is the measure of concentration of reactants or the measure of concentration of products with respect to time.

As the rate of decomposition of HI is given as follows.

\(Rate = k[HI]^{2}\)

When concentration of HI is tripled then the new rate will be as follows.

\(R^{'} = k[HI]^{2}\\= k \times (3)^{2}\\= 9k\)

This shows that rate increases by a factor of 9.

Thus, we can conclude that when the concentration of HI is tripled then the rate increases by a factor of 9.

Answer:

\(m_{undissolved}=27g\)

Explanation:

Hello,

In this case, we first define the solubility as the maximum amount of a solute that is completely dissolved in an specific amount of solvent and it is temperature-dependent. Thus for potassium iodide, its solubility at 30°C is 153 g per 100 cm3 of water, therefore, with the given amount, the undissolved amount results:

\(m_{undissolved}=180g-153g=27g\)

Best regards.

The balanced thermochemical equation for the reaction is CH₄ + 2O₂ ------> CO₂ + 2H₂O.

The reaction is exothermic because heat is released to the surrounding.

The balanced thermochemical equation for the reaction is given as;

CH₄ + 2O₂ ------> CO₂ + 2H₂O, ΔH = -890 kJ

This equation shows that one mole of methane gas reacts with two moles of oxygen gas to form one mole of carbon dioxide gas and two moles of liquid water, with the release of 890 kJ of energy.

The negative value of the change in enthalpy, ΔH = -890 kJ, indicates that the reaction is exothermic. In an exothermic reaction, energy is released to the surroundings, typically in the form of heat.

Learn more about exothermic here: https://brainly.com/question/24808802

#SPJ1

Answer:

V = 4/3 * 3.1416 * (37x10-10)3

V = 2.12x10-25 cm3

d = m/V

d = 1.67x10-24 / 2.12x10-25 = 7.87 g/cm3

The difference in temperature, let's convert F to ºC:

ºC = -80-32/1.8 = -62.22 ºC

dT = -92.6 + 62.2 = -30.4 ºC

The number of hydrogen atoms lined up side to side to make 1.00 inch is equal to 3.43 × 10⁷ atoms when the radius of one H-atom is 37 pm.

The atomic radius of a hydrogen atom is the distance between the center of the nucleus to the boundary of the electron that surrounds it.

Given, the radius of the hydrogen atom = 37pm

Then the diameter of the hydrogen atom = 37 + 37 = 74 pm

We know that 1 pm = 10⁻¹¹ m

Then the diameter of the one H - atom =  74 × 10⁻¹¹ m

The value of 1 m = 100 cm then the diameter of H-atom =  74 × 10⁻⁹ cm

As we know, the value of one inch = 2.52 cm

So, if 74 × 10⁻⁹ cm length takes H-atom = 1

Then, 2.52 cm would take hydrogen atoms = 2.52/  74 × 10⁻⁹ = 3.43 × 10⁷

Therefore, 3.43 × 10⁷ hydrogen atoms lined up side to side to make 1.00 inch.

Learn more about the hydrogen atom, here:

https://brainly.com/question/8806577

#SPJ5

Answer:

The independent variable is the volume of the strong acid added to the strong base

The dependent variable is the effect of the combination of the acid and base on the pH

Explanation:

The given parameters are;

The rate at which Ashley is adding the strong acid to the strong base = 1 mL per each time

The volume of the strong base to which Ashley is adding the acid = 30 mL

Therefore;

The testing, or independent variable of the experiment = The number of 1 mL volume of the strong acid Ashley adds to the strong base

The outcome, or dependent variable of the experiment = The measured (change) effect on the pH.

Answer:

t

Explanation:

because for atoms to change they have to have some kind of chemical action to get new life

Eutrophication

In an aged aquatic habitat like a lake, eutrophication is the progressive rise in the concentration of phosphorus, nitrogen, and other plant nutrients. As the volume of organic matter that can be converted into nutrients increases, the productivity or fertility of such an ecosystem also naturally rises.

Eutrophication may be caused by a number of things, including overuse of fertilisers, untreated sewage, the use of phosphorous-containing detergents, and industrial waste discharge.

Learn more about Eutrophication here:

https://brainly.com/question/26956972

#SPJ4

Answer:

Soapy detergents clean more effectively than normal soap. Hard water (water with high mineral content). Hard water can be used with soapy detergents but soap cannot be used with hard water. When soapy detergent and hard water are combined it makes a protective film that is really resistant to rinsing.

Have a good day.

Answer:

negitive 5 or -5

Explanation

usally 12-7 = 5 but 7 is first so it you turn 5 to negitive 5

or -5

After the peak of an action potential, the influx of sodium ions into the cell is prevented primarily by two mechanisms: the inactivation of voltage-gated sodium channels and the action of the sodium-potassium pump.

Inactivation of voltage-gated sodium channels: Voltage-gated sodium channels play a crucial role in the initiation and propagation of an action potential. These channels have two key states: the open state, allowing the entry of sodium ions, and the inactivated state, preventing further sodium ion influx.

During an action potential, when the membrane potential depolarizes, voltage-gated sodium channels open, allowing sodium ions to rush into the cell. However, shortly after reaching the peak of the action potential, these channels undergo a process called inactivation.

Sodium-potassium pump: Another mechanism that prevents the continuous influx of sodium ions is the action of the sodium-potassium pump (Na+/K+ pump). This pump actively transports sodium ions out of the cell and potassium ions into the cell, using energy derived from ATP hydrolysis.

By maintaining a low intracellular sodium concentration, the sodium-potassium pump establishes the concentration gradient necessary for the restoration of resting membrane potential.

Know more about action potential here:

https://brainly.com/question/20277449

#SPJ11

The experiment involves observing the color changes of various substances in the presence of a china rose indicator to determine their acidic or basic nature. The neutralization process can also be observed by mixing an acid and a base and noting the resulting color change.

For more questions on neutralization

https://brainly.com/question/23008798

#SPJ8

Answer:

parts of outer space where there is no air or atoms

Explanation:

Matter is made up of atoms. Similar to how your cells make your body, atoms make up all and everything. This since outer spaces doesn't have atoms, it doesn't have matter as well (at least not the normal matter, it does have dark matter, which is a whole can of worms that should not be opened)

A. parts of outer space where there is no air or atoms matter do not exist in this scenario.

An atom is a particle of matter that uniquely defines a chemical element. An atom consists of a principal nucleus that is normally surrounded via one or extra electrons. every electron is negatively charged. The nucleus is definitely charged and carries one or extra tremendously heavy particles referred to as protons and neutrons.

it's far composed of protons, which have a tremendous fee, and neutrons, which haven't any rate. Protons, neutrons, and the electrons surrounding them are long-lived particles found in all normal, naturally going on atoms.

Learn more about Atoms at https://brainly.com/question/6258301

#SPJ2

Answer:

Chemical reaction, a process in which one or more substances, the reactants, are converted to one or more different substances, the products.

A chemical reaction rearranges the constituent atoms of the reactants to create different substances as products.

Chemical reactions are an integral part of technology, of culture, and indeed of life itself. Burning fuels, smelting iron, making glass and pottery, brewing beer, and making wine and cheese are among many examples of activities incorporating chemical reactions that have been known and used for thousands of years. Chemical reactions abound in the geology of Earth, in the atmosphere and oceans, and in a vast array of complicated processes that occur in all living systems.

Explanation:

hope it help

plss brainlys me

Answer:

Chemical reaction, a process in which one or more substances, the reactants, are converted to one or more different substances, the products

Explanation:

Substances are either chemical elements or compounds. A chemical reaction rearranges the constituent atoms of the reactants to create different substances as products.

The number of moles of solute particles present in a 269 ml solution of 0.173 M CaCl₂ is 0.0463 moles.

To calculate the number of moles of solute particles, we need to consider that CaCl₂ dissociates completely in water, resulting in three moles of solute particles per mole of CaCl₂.

The concentration of the CaCl₂ solution is 0.173 M, we can use the formula:

moles of solute = concentration × volume

Converting the volume from milliliters (ml) to liters (L) by dividing by 1000, we have:

0.269 L × 0.173 mol/L = 0.0463 moles of CaCl₂

Since each mole of CaCl₂ dissociates into three moles of solute particles (Ca²⁺ and 2 Cl⁻), the total number of moles of solute particles in the solution is also 0.0463 moles.

learn more about moles here:

https://brainly.com/question/28239680

#SPJ4

Answer:

Covalent bonding occurs when pairs of electrons are shared by atoms. Atoms will covalently bond with other atoms in order to gain more stability, which is gained by forming a full electron shell. By sharing their outer most (valence) electrons, atoms can fill up their outer electron shell and gain stability.

Answer:

B. changes in energy during the reaction

Explanation:

y-axis measures "energy" and x-axis measures "reaction progress". Those units fit well with (B) and not so well with concentration and time (A), phases and temperature (C), or reaction rate and time (D).

Answer:

b. changes in energy during reaction

Explanation:

graph

The amount of energy required to melt 48 grams of ammonia is approximately 15.97 kJ

To calculate the amount of energy required to melt 48 grams of ammonia (NH₃), we need to use the heat of fusion of ammonia, which is given as 5.66 kJ/mole.

First, we need to calculate the number of moles of ammonia in 48 grams;

Number of moles = mass/molar mass

The molar mass of ammonia (NH3) is;

Nitrogen (N) = 14.01 g/mol

Hydrogen (H) = 1.01 g/mol

Molar mass of NH₃ = (14.01 g/mol) + 3(1.01 g/mol)

= 17.03 g/mol

Number of moles of NH₃ = 48 g / 17.03 g/mol = 2.82 moles

Next, we can use the heat of fusion of ammonia to calculate the amount of energy required to melt 2.82 moles of ammonia:

Energy = moles × heat of fusion

Energy = 2.82 moles × 5.66 kJ/mole

= 15.97 kJ

Therefore, the amount of energy required is 15.97 kJ

To know more about heat of fusion here

https://brainly.com/question/14053504

#SPJ1

A chemical equation that is balanced has the same number of each type of atom on both sides of the equation.

An equation for a chemical reaction is said to be balanced if both the reactants and the products have the same total charge and the same number of atoms for each component in the reaction. In other words, both sides of the reaction have equal amounts of mass and charge.

Chemical equations known as ionic equations solely display the ions involved in a chemical reaction. Or, the ions that combine in a solution to react and create new compounds. The ions that don't take part are referred to as spectator ions.

A chemical equation known as a net ionic equation only includes the ions that are undergoing chemical changes as the reaction progresses.

To know about equation

https://brainly.com/question/28294176

#SPJ4

The final volume of the solution is 0.21 L.

Given mass divided by molecular mass is used to represent moles.

Hence ,

n = w / m

moles = n

given mass = w

the molecular mass, or m.

Considering the query,

w = 15.89 g

AgNO3's mass value is 169.87 g/mol.

Consequently, the moles can be determined as -

n = w / m

n = 15.89 g / 169.87 g/mol

n = 0.094 mol

Molarity :

The number of moles in a liter of solution is the molarity of a substance.

M = n / V

M = molarity

V i= the solution's volume in liters.

Considering the query,

M = 0.250 M

n = 0.066 mol ( estimated above )

Using the above equation, one may determine the final volume of the solution.

M = n / V

0.250 M = 0.094 mol / V

V = 0.21 L

So, a student wants to make a 0.250 m aqueous solution of silver nitrate, agno3, and has a bottle containing 15.89 g of silver nitrate. The final volume of the solution should be 0.21 L.

To learn more about Silver nitrate, here :

https://brainly.com/question/16992937?referrer=searchResults

#SPJ4

Answer:

{B}

Explanation:

Answer:

Lithium (Li)

Explanation:

Lithium has an atomic number of  3

A pi bond is the result of the d) sideways overlap of two parallel p orbitals.

Pi bonds are bonds that occur as a result of overlapping orbitals of atoms that are not in the bond axis. Each p orbital that contributes to a pi bond has two lobes and has a node at the core.

The pi orbital can hold a maximum of two pairs of electrons. Whereas each electron in a pi bond is also called a pi electron, the pi electrons are used for double bonds or triple bonds. The 2p orbital of carbon has slightly higher energy than the sp2 orbital, so the pi bond formed from two 2p orbitals has somewhat higher energy and is slightly less stable than the sp2-sp2 sigma bond.

Learn more about  pi bonds at:

https://brainly.com/question/13243902

#SPJ4

Answer:

a) 8×10²³ molecules of N2

Explanation:

Let us consider the same temperature and pressure of both sample are standard temperature and pressure.

Standard temperature = 273.15 K

Standard pressure = 1 atm

Number of moles of CO₂ = 0.107  mol

Volume of CO₂ = ?

Solution:

PV = nRT

R = general gas constant = 0.0821 atm.L /mol.K

1 atm × V = 0.107 mol × 0.0821 atm.L /mol.K × 273.15 K

1 atm × V = 2.4 atm.L

V = 2.4 atm.L/1 atm

V = 2.4 L

Volume of N₂:

Number of moles of N₂:

1 mole =  6.022 ×10²³ molecules

8×10²³ molecules × 1 mol /  6.022 ×10²³ molecules

1.33 mol

PV = nRT

R = general gas constant = 0.0821 atm.L /mol.K

1 atm × V = 1.33 mol × 0.0821 atm.L /mol.K × 273.15 K

1 atm × V = 29.83  atm.L

V = 29.83  atm.L/1 atm

V = 29.83 L

The binding of the amino acid in aminoacyl-tRNA involves the formation of an ester bond.  Option b

Aminoacyl-tRNA is a complex molecule that plays a crucial role in protein synthesis. It consists of a tRNA molecule covalently linked to an amino acid. The amino acid is attached to the 3' end of the tRNA molecule through an ester bond.

An ester bond is formed between the carboxyl group (-COOH) of the amino acid and the hydroxyl group (-OH) of the ribose sugar at the 3' end of the tRNA molecule. This ester bond is also referred to as an ester linkage. The formation of the ester bond is catalyzed by the enzyme aminoacyl-tRNA synthetase.

The ester bond in aminoacyl-tRNA is essential for protein synthesis. During translation, the aminoacyl-tRNA molecule carries the specific amino acid to the ribosome, where it is incorporated into the growing polypeptide chain. The ester bond is later hydrolyzed, releasing the amino acid for further use in protein synthesis.

In summary, the binding of the amino acid in aminoacyl-tRNA involves the formation of an ester bond between the carboxyl group of the amino acid and the hydroxyl group of the ribose sugar in the tRNA molecule.

Option b

For more such question on amino acid visit:

https://brainly.com/question/30265108

#SPJ8

Answer: 3.33

Explanation:

The molecular formula of the given composition is C₃H₆O₃.

Molecular formula is defined as a compound's chemical formula, which counts the total number of each element present in a molecule of the compound as discrete molecules. The arrangement of atoms in a molecule in three dimensions is known as molecular geometry, commonly referred to as the molecular structure.

The percentage composition is

C = 40.00 %

H = 6.72 %

O = 53.29 %

Mole = 100 g

Mass of C = 40 / 100 x 100 = 40 g

mass of H = 6.72 / 100 x 100 = 6.72 g

Mass of O = 53.29 / 100 x 100 = 53.29 g

Dividing the mass with moles

C = 40 / 12 = 3.3

H = 6.72 / 1 = 6.72

O = 53.29 / 16 = 3.3

Formula = C₃H₆O₃

Thus, the molecular formula of the given composition is C₃H₆O₃.  

To learn more about molecular formula, refer to the link below:

https://brainly.com/question/28647690

#SPJ2

The volume of 6.9 mol of oxygen at 233 K and a pressure of 4.0 atm is approximately 12.0L.

To calculate volume of a gas, we can make use of Ideal Gas Law equation. It is a fundamental equation in thermodynamics that describes the behaviour of an ideal gas under certain circumstances. It relates pressure(P), volume(V), number of moles (n), and temperature(T) of an ideal gas using the equation:

PV = nRT

Where P = Pressure of the gas,

           V = Volume of the gas,

           n = Number of moles of the gas,

           R = Ideal gas constant commonly expressed as 0.0821  L·atm/(mol·K) or 8.314 J/(mol·K),

          T = Temperature of the gas.

In the question, we are given with:

n = 6.9 mol

T = 233 k

P = 4.0 atm

Substituting the above values in the equation to find the volume, we get:

4.0 * V = 6.9 * 0.0821 * 233

V = (6.9 * 0.0821 * 233) / 4.0

V = 11.9997 (approximately 12.0)

Therefore, The volume of 6.9 mol of oxygen at 233 K and a pressure of 4.0 atm is approximately 12.0L.

To study more about Volume of oxygen:

https://brainly.com/question/31630111

https://brainly.com/question/4987534

Answer:

Metals react with water to form oxides or hydroxides and release Hydrogen gas.

Explanation: