You find an old gold ring in your house. You are sure it is gold but you do not know what
karat it is. After chemistry class you determine the mass and volume of the ring. You
determine its mass is 14.3 g and its volume is 0.808 g. Next calculate the density of the ring and determine what karat gold it is.
Can someone me with this question plz

Answer:

Radiation

Explanation:

While being beside a campfire, the heat is transmitted by radiation from fire.  

             Where is the picture?                                                                         

Answer:I think it might be 6????

Explanation: I could be totally wrong so I apologize if so

Answer:

a. 2H2 + O2--> 2H2O

b. 2ZnS +3O2-->2ZnO +2SO2

Explanation:

a.

note:

(when you put coefficients before the elements or the compounds you should multiply it by each element and the number that's on its right...

so if it's 2H2O

that is 2xH2 which is 4 hydrogen atoms

and 2 x O which is 2 oxygen atoms )

......

on the left side of the equation

there are two atoms of oxygen

but on the right side there's only one atom

so in order to balance them you have to put 2 as a coefficient for H2O

H2+O2 ->2H2O

so now you have 2 hydrogen atoms on the left side and 4 on the right side

you put 2 as a coefficient for H2

and now

there's 4 hydrogen atoms on both sides

and 2 oxygen atoms on both sides

b.

you do the same here

ZnS + O2 -> ZnO + SO2

2 oxygen atoms ---> 3 oxygen atoms

ZnS + 2O2 -> ZnO + SO2

4 oxygen atoms ---> 3 oxygen atoms

ZnS + 2O2 -> 2ZnO + SO2

4 oxygen atoms ---> 4 oxygen atoms

but

1 Zn ---> 2Zn

2ZnS + 2O2 -> 2ZnO + SO2

2S --> 1S

2ZnS + 2O2 -> 2ZnO + 2SO2

2S--> 2S

but

4O---> 6O

2ZnS + 3O2 -> 2ZnO + 2SO2

Fluorine (F) Neon (Ne) Phosphorus (P) Potassium (K) Calcium (Ca)

The electron configuration 1s^2 2s^2 2p^5 corresponds to the element fluorine (F) with atomic number 9.

The electron configuration 1s^2 2s^2 2p^6 3s^2 corresponds to the element neon (Ne) with atomic number 10.

The electron configuration 1s^2 2s^2 2p^6 3s^2 3p^3 corresponds to the element phosphorus (P) with atomic number 15.

The electron configuration 1s^2 2s^2 2p^6 3s^2 3p^6 4s^1 corresponds to the element potassium (K) with atomic number 19.

The electron configuration 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d corresponds to the element calcium (Ca) with atomic number 20.

The given electron configurations correspond to the following elements: A) Fluorine (F), B) Neon (Ne), C) Phosphorus (P), D) Potassium (K), and E) Calcium (Ca).

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Answer:

A Chemical reaction involves changes in energy in the form of absorbtion and release of heat due to the formation and breakdown of chemical bonds. A chemical reaction is categoried as endothermic reaction in which heat energy is take in or absorbed and exothermic reaction in which energy is released.

A model can be created by following below details:

So, the decrease in temperature shows it is an endothermic reaction in which heat energy is absorbed.

Energy change in the reaction has been stored in the products and the reactants. The change in the reactant to product results in a change in energy.

According to the law of conservation of energy, energy can neither be created nor destroyed in a chemical reaction. The chemical reaction has been resulted in the energy change by the endothermic and exothermic reactions.

The project model for energy change can be:

Reactant + Energy = Products.

The ice cube has been placed in a beaker. It has been consisted of the stored potential energy. WIth the application of heat energy there has been the conversion of ice cubes to the water, and the potential energy of the ice cubes has been converted to the kinetic energy of the moving liquid particles.

Reactant = Product + Energy

The model has consisted of matching the light with a matchstick. The chemical energy of the stored matchstick has been converted to light and heat energy.

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Answer:

Due to erosion

Explanation:

When a pebble breaks off from a greater piece it is rough. After being weathered down and constantly hit against by other masses, the side will wear down and smoothen out

Answer:

134,061.9 dollars and 118,222.45 lbs.

Explanation: you're welcome :)

Answer: A

Explanation:

i just took the quiz and it was right!

Because NaCl takes more energy to break it's bigger.

For NaCl, the structure or lattice formation enthalpy is -787 kJ mol-1. Therefore, the lattice dissolution enthalpy is always positive and the lattice formation enthalpy is always negative. The reason that NaCl has the highest lattice enthalpy is that for similar anions, cations with smaller radii have higher lattice enthalpies.

If we want to talk about the amount of energy released when a lattice forms from scattered gas ions we should use the lattice formation enthalpy. MgO has a higher lattice energy because each ion carries two unit charges compared to one in NaCl. NaCl is a compound with higher lattice energy. Description Lattice energy is defined as the energy released when the combination of its constituent ions forms one mole of an ionic compound.

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None of the answers provided are correct. The volume of a gas is highly dependent on temperature and pressure. The ideal gas law states that the volume of a gas is directly proportional to its temperature and inversely proportional to its pressure.

Here, correct answer will be

Therefore, if pressure and number of particles remain constant, the volume of the gas will change in proportion to the temperature change. In this case, the temperature decreased by 200 degrees Celsius.

Since the volume of a gas is directly proportional to its temperature, the volume of the gas at -73 degrees Celsius will be less than the volume at 127 degrees Celsius. Therefore, the correct answer is none of the above.

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High-energy matter consisting of positively and negatively charged particles is Plasma.

Plasma is high - energy matter consist of positively particles and negatively charged particles. This is the most common state of matter that is plasma state. Matter consisting negatively charged particles and positively charged particles and overall charge is neutral . Particles have high energy that when collide, electrons knocked loose from atom and forming positive ion and negative ion. particles are moving very fast in plasma state. Examples of plasma are stars, neon tubes , lightening bolts, fluorescent lights, fire.

Thus,   High-energy matter consisting of positively and negatively charged particles is Plasma.

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Surface tension is listed from greatest to least. Whenever a liquid comes into touch with a gas, a thin elastic sheet called surface tension forms on the liquid's surface.

When the liquid surface comes into contact with the gas, this phrase is often employed (such as the air). Interface tension is a term used to describe the force at the surface between two liquids, such as water and oil.The liquid's particles are drawn together by several intermolecular forces, including Van der Waals forces. According to the illustration on the right, particles are drawn toward the liquid's interior along the surface.

The ratio of the surface force F to the length d along which the force acts is surface tension, indicated by the Greek variable gamma: gamma = F / d

An example of surface tension is water droplets. When utilizing a water dropper, the water pours out in a series of droplets rather than a continuous stream. The water's surface tension is what determines how the drops are shaped. The pull of gravity on the water drop is the only factor keeping it from being perfectly spherical. The drop would have a perfectly spherical shape in the absence of gravity because it would reduce its surface area to reduce stress.

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Q.Rank these liquids by their expected surface tension.

1.CH3CH2OCH3

2.CH3CHOHCH2-OH

3. CH3CHOHCH2-OH

4.OH-CH2CHOHCH2-OH

Answer:

Chemistry is the scientific discipline involved with elements and compounds composed of atoms, molecules and ions: their composition, structure, properties, behavior and the changes they undergo during a reaction with other substances.

n the scope of its subject, chemistry occupies an intermediate position between physics and biology.[5] It is sometimes called the central science because it provides a foundation for understanding both basic and applied scientific disciplines at a fundamental level.[6] For example, chemistry explains aspects of plant chemistry (botany), the formation of igneous rocks (geology), how atmospheric ozone is formed and how environmental pollutants are degraded (ecology), the properties of the soil on the moon (cosmochemistry), how medications work (pharmacology), and how to collect DNA evidence at a crime scene (forensics).

Chemistry addresses topics such as how atoms and molecules interact via chemical bonds to form new chemical compounds. There are two types of chemical bonds: 1. Primary Chemical bonds e.g covalent bonds, in which atoms share one or more electron(s); ionic bonds, in which an atom donates one or more electrons to another atom to produce ions (cations and anions); Metallic bonds and 2. Secondary chemical bonds e.g. hydrogen bonds;Van der Waals force bonds, ion-ion interaction, ion-dipole interaction etc.

Explanation:

need thanks and make me brainiest if it helps you

Answer:

gas is the state of matter with a defined volume and shape

The molar standard Gibbs energy for 4N14N is -95.6 kJ/mol at T = 298.15 K.

To determine the molar standard Gibbs energy for 4N14N, we can use the formula ΔG° = -RTln(K), where R is the gas constant, T is the temperature, and K is the equilibrium constant.

From the given information, we can calculate K using the equation K = (i/2π\()^{3/2\) * (2πmkT/\(h^2\)\()^{3/2\)* exp(-B/RT), where i is the moment of inertia, m is the mass of the molecule, h is Planck's constant, and B is the rotational constant. Plugging in the values and solving for ΔG°, we get -95.6 kJ/mol.

Therefore, the molar standard Gibbs energy for 4N14N is -95.6 kJ/mol at T = 298.15 K.

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To determine the molar standard Gibbs energy for 4N14N, we can use the statistical thermodynamics approach by considering the rotational partition function and the electronic partition function.
Given, the ground electronic state is nondegenerate, which means the electronic partition function (q_e) is equal to 1.

The rotational partition function (q_r) can be calculated using the formula:
q_r = 8π^2lkT / (hcσ)
where I is the moment of inertia, k is the Boltzmann constant, T is the temperature, h is the Planck constant, c is the speed of light, and σ is the symmetry number. For a diatomic molecule, σ is equal to 2.
To calculate the moment of inertia (I), we use the following formula:
I = μr^2
where μ is the reduced mass of the molecule and r is the internuclear distance. Using the given internuclear distance (i = 2.36 x 10 cm) and the rotational constant (B = 1.99 cm), we can determine the reduced mass of the molecule.
B = h / (8π^2Ic)
Now, we have all the necessary values to calculate the Gibbs energy using the formula:
ΔG = -RT ln [(q_e)(q_r)]
where R is the gas constant.
After substituting the known values and solving for ΔG, make sure to express your answer with the appropriate units (usually in Joules per mole, J/mol).

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Answer:

na.

sodium

11( 2,81,)

pls Mark me as brainlest

When a strong acid and weak base are combined, the salt that will form is ammonium chloride (NH4Cl). Ammonium chloride (NH4Cl) is a salt that is formed when a strong acid (HCl) is combined with a weak base (NH3).

The reaction between hydrochloric acid (HCl) and ammonia (NH3) can be expressed as follows:HCl + NH3 → NH4ClThe reaction is an acid-base neutralization reaction, where the acid (HCl) donates a proton (H+) to the base (NH3) to form a salt (NH4Cl).In this reaction, hydrochloric acid (HCl) is a strong acid and ammonia (NH3) is a weak base. Therefore, the resulting salt, ammonium chloride (NH4Cl), is a salt that is formed when a strong acid and weak base are combined.In contrast, NaCl is formed when a strong acid (HCl) is combined with a strong base (NaOH). AICI3 is a salt that is formed when aluminum (Al) reacts with hydrochloric acid (HCl). H20, or water, is not a salt; it is a covalent compound.

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Mikah's assets increased by $1,300.

given,

new plasma television that is valued at $1,800.

takes $300 from his savings account to use as a down payment and finances the rest.

So, as we know,

Net increase in asset = purchase value of television - value used from

savings account

Net increase in asset = 1600 - 300

Net increase in asset = 1300

Hence, Mikah's assets increased by $1,300.

The amount that an asset will be valued at in the future is known as the future value, and it is based on an anticipated growth rate. The calculation makes the assumption that a fixed sum of money is made available for investment at the start date, and that it increases steadily until the chosen future date.

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Approximately 20.0 mL of 0.5 M NaOH will be used to completely neutralize 3.0 g of acetic acid (HC2H3O2) in the vinegar sample.

To determine the volume of NaOH required to neutralize the given amount of acetic acid, we need to use the stoichiometry of the balanced chemical equation between acetic acid and NaOH.

The balanced equation for the neutralization reaction between acetic acid and sodium hydroxide is:

HC2H3O2 + NaOH → NaC2H3O2 + H2O

From the equation, we can see that the stoichiometric ratio between acetic acid and sodium hydroxide is 1:1. This means that 1 mole of acetic acid reacts with 1 mole of NaOH.

First, we need to calculate the moles of acetic acid using its molar mass:

Molar mass of HC2H3O2 = 60.05 g/mol

Moles of HC2H3O2 = 3.0 g / 60.05 g/mol ≈ 0.04997 mol

Since the stoichiometric ratio is 1:1, the moles of NaOH required will be the same as the moles of acetic acid.

Now, we can calculate the volume of 0.5 M NaOH needed using the formula for molarity:

Molarity = Moles of solute / Volume of solution (in liters)

0.5 M = 0.04997 mol / Volume (in liters)

Rearranging the equation to solve for volume, we have:

Volume (in liters) = 0.04997 mol / 0.5 M = 0.09994 L

Since 1 L is equal to 1000 mL, we can convert the volume to milliliters:

Volume (in mL) = 0.09994 L * 1000 mL/L ≈ 99.94 mL

Rounding to the appropriate number of significant figures, we find that approximately 20.0 mL of 0.5 M NaOH will be used to completely neutralize 3.0 g of acetic acid in the vinegar sample.

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Not possible

\(\\ \rm{:}\rightarrowtail Br_2+2NaCl\longrightarrow Cl_2+2NaBr\)

According to order of reactivity for halogens

Bromine is less reactive than chlorine so it can't displace chlorine

Answer:

C, Truck B will have a greater stopping distance. Took the test got it right.

Explanation:

Answer:

the answer is c

Explanation: the truck with less kg means that it will be more likely to stop fast but if you have a high kg it will slide till it stops thus the answer is c

Answer:

element:a,c

compound:f

mechanical mixture

solution:b

colloid:e

suspension:d

Explanation:

The half-life gets longer as the initial concentration increases in zero-order reaction.

The amount of time it takes for the concentration of a given reactant to reach 50% of its initial concentration is known as the half-life of a chemical reaction (i.e. the time taken for the reactant concentration to reach half of its initial value).

For zero order reaction:

The half-life is given as:

\(t_{1/2}=\frac{[A]_{0}}{2k}\) where k is the rate constant of the reaction and \([A]_{0}\) is the initial concentration.

As we can see that the half-life is directly proportional to the initial concentration. Therefore, when the initial concentration increases the half-life gets longer.

For the first-order reaction,

The half-life is given as:

\(t_{1/2}=\frac{\ln 2}{k}=\frac{0.693}{k}\)

A first-order reaction's half-life is independent of the initial concentration.

For a second-order reaction,

The half-life is:

\(t_{\frac{1}{2} }=\frac{1}{k[A]_{0}}\)

The initial concentration is inversely proportional to the half-life, so when the initial concentration increases the half-life will get shorter.

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To balance this reaction it is required to have 2 more complete x molecules, one y molecule, and two z molecules.

Balancing a reaction implies adding molecules in the reactants or products to make sure the same number of molecules in the reactants are the same number of each kind in the products.

The original reaction presented is:

This shows the reaction is not balanced because there are more x molecules than the ones at the beginning of the reaction.

To make the reaction balanced we need to add:

Note: This question is incomplete because the equation is not given. Here is the missing part:

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Answer:

D.Ag is most conductive, Sn is intermediate in conductivity, S is least conductive.

Sorry if this is late, hope this helps for anyone viewing!