Georgia discovered a piece of metal. She measured its mass as 14 grams and its volume as 2 cm3. Georgia then compared the metal she found with the metals in the table below.

DENSITY OF METALS

Which type of metal did Georgia most likely find?
A.Gold
B.Lead
C.Silver
D.Zinc

The strand 1 of hydrocarbons is used to produce plastic, hence option D is correct.

Raw resources like natural gas, oil, or plants that have been processed into ethane and propane are used to make plastics. The subsequent "cracking" procedure uses heat to transform ethane and propane into ethylene and propylene. To produce various polymers, these components are mixed.

Propylene is a substance found in large quantities in petroleum. In order to speed up chemical processes, refiners combine heated propylene with a catalyst to create plastic. Propylene molecules start to cluster together like beads on a thread as a result.

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Answer:

C the mass of the reactant molecules is the same as the mass of the product

The option that correctly describes a covalent species that has four electron groups around the central atom are:

It should be noted that when a molecule have four electron groups and it is been found around the central atom and this will orients the four groups in the direction of a tetrahedron.

However when there are  four atoms attached to these electron groups, in Tetrahedral Geometry, molecular shape  will also be also tetrahedral.

Instance of this is Methane (CH 4), in conclusion, in the case whereby all four electron pairs are bonding pairs, then it can be concluded that the  shape of the system is tetrahedral.

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missing options:

The ideal bond angle for a four-electron system is 109.5°.

If all four electron pairs are bonding pairs, the shape of the system is tetrahedral.

The eletron are not bonding in the system.

A bent shape is observed if there are two bonding pairs and two lone pairs.

Explaining how the strongest type of intermolecular force in liquid HF arises:

• HF arises up to 293 K boiling point,

• We have a hydrogen bonding , highly polarised , this is the srongest internolecular force of attraction.

• H+-F- : have a highest boiling point because of the presence of strong hydrogen bond.

Below is the diagram :



Answer:

Because, Gibbs eats more of balanced diet, and that's why the process should be carried out.

Explanation:

I can say Gibbs is healthy and eats balanced diet so Gibbs energy, enthalpy, and entropy should determine whether a process will be a spontaneous or no spontaneous

The  product of combining Aluminum & Hydroxide is option  C. AI(OH)3

Aluminum goes through a double displacement reaction when it reacts with hydroxide. The chemical element aluminum in its cationic form, Al3+, bonds with a set of three anionic hydroxide particles, OH-, resulting in the formation of a chemical compound identified as aluminum hydroxide (AI(OH)3).

The other options are inaccurate as AI(OH) is not a steady substance, and neither AIOH3 nor AI3OH are appropriate formulas for the compound aluminum hydroxide.

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Mass in grams of 3.07 moles of glucose is 553.3 g (rounded to three significant figures).

What is Mass?

Mass is a fundamental physical property of matter that quantifies the amount of matter in an object. It is a measure of the resistance of an object to acceleration when a force is applied to it. In other words, mass is the amount of substance in an object, and it determines how much gravity will affect that object.

To determine the mass in grams of 3.07 moles of glucose (C6H12O6), we need to first calculate the molar mass of glucose, which is the sum of the atomic masses of all the atoms in its chemical formula:

Molar mass of C6H12O6 = 6(12.01 g/mol) + 12(1.01 g/mol) + 6(16.00 g/mol) = 180.18 g/mol

Next, we can use the following conversion factor to convert moles to grams:

mass (g) = number of moles x molar mass (g/mol)

mass = 3.07 mol x 180.18 g/mol = 553.3 g

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The factor that  doesn’t change the resistance of a wire is pressure. option A.

Resistance is a conductor's capacity to thwart the passage of current. It is controlled by the interplay of the applied voltage and the electric current passing through it. The amount of opposition any object applies to the flow of electric current is referred to as resistance.

The ohm, a unit of measurement for resistance, is represented by the Greek letter omega. According to Ohm's law, the voltage across two places is precisely proportional to the current flowing through a conductor between them.

Hence option A is correct.

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missing part;

The pressure

The length of the resistor.

The thickness of the resistor.

The temperature of the conductor.

Answer:

The kinetic molecular theory of matter states that: Matter is made up of particles that are constantly moving. All particles have energy, but the energy varies depending on the temperature the sample of matter is in. This in turn determines whether the substance exists in the solid, liquid, or gaseous state.

Explanation:

Answer:

0.4 kg/m^3

Explanation:

v (volume) = 20m x 10m x 5m = 1000 m^3

w (weight) = 400 kg

d (density) = w / v

d = 400 / 1000 = 0.4 kg per cubic meter (kg/m^3)

I apologize if this is a little complex, however all of the math is there, if you're interested then look it over. Otherwise I've provided the answer in the units used for the dimensions and weight provided.

Answer:

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pls give brainlyest

Explanation:

200 IQ intellectual right here ^^

Answer

The pressure inside the cylinder will change to 14.686 atm

Explanation

Given:

Volume, V = 0.500 L

Moles of O2 = 0.150 mol

Temperature, T = 25 °C = (25 + 273.15 K) = 298.15 K

Step-by-step solution:

The first step is to calculate the pressure exerted by O2 using ideal gas equation:

Plugging the values of the parameters into the formula:

The pressure exerted by O2 = 7.343 atm

If 0.150 mol of sulfur dioxide, SO2 was added to the oxygen gas already in the cylinder, then the pressure inside the cylinder will change by a factor of 2. That is:

Total pressure will be = 2 x 7.343 atm = 14.686 atm

Or the total pressure can be calculated using the ideal equation above, and putting n = 0.150 mol + 0.150 mol = 0.3 mol

Answer: it think it would be last one.  the mouth to the stomach is the answer.

Explanation:

Answer:

The correct answer is D! The esophagus connects the mouth to the stomach.

Explanation:

The mouth is connected to the esophagus, which in turn is connected to the throat. The throat, in turn, connects the mouth to the stomach.

I had this on a science test and I got it right :D

I hope this helps! ;)

Acids: \(\text{H}_{2}\text{PO}_{4}^{\text{ }-}\) and \(\text{H}_{2}\text{BO}_{3}^{\text{ } -}\)

Bases: \(\text{HBO}_{3}^{\text{ } 2-}\) and \(\text{HPO}_{4}^{\text{ } 2-}\)

Answer:

1.75 moles

Explanation:

According to CaC₂(s) + 2 H₂O(l) --> C₂H₂(g) + Ca(OH)₂(aq)

2 moles of H20 will produce 1 mole of Ca(OH)2

therefore 3.5 moles of H2O will produce 3.5 x (1/2) = 1.75 moles of Ca(OH)2

A reaction in which reactants react to form products is called forward reaction. In some reactions, products would change back into reactants which is called backward reaction.

In forward reaction, the reactants react with each other and forms product as a result. The reaction occurs from left to right in an equation.

In backward reaction, the products that was formed would revert back to form reactants due to surrounding conditions. The reaction occurs from right to left in an equation.

The type of reaction where both forward and backward reaction takes place is called reversible reaction. When the rate of the reaction between forward and backward reaction becomes equal, it reaches a state of equilibrium.

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The number of bonding pairs and the number of lone pairs around the right hydrogen atom in this molecule is 1 in no. (bonding pairs) and 0 in no. (lone pairs).

The right hydrogen atom in this molecule is bonded to the carbon atom through a single bond. The carbon atom in turn has a total of four bonds: two with the hydrogen atoms and two with the other carbon atom in the molecule. In the Lewis structure, a single bond is represented by a line connecting two atoms. A pair of electrons shared between two atoms is called a bond pair. Thus, the right hydrogen atom has 1 bonding pair and 0 lone pairs. Lone pairs refer to electrons that are not involved in bonding but are present around an atom. In this molecule, the right hydrogen atom only has one bonding pair, and no electrons are present as lone pairs.

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Answer:

In Haloarenes the C atom to which the X group is attached is SP2 hybridized thus it is become difficult to replace it by the Nucleophile. Since arenes and Vinyl halides are electron rich molecules due to presenceof n bonds, they repel Nucleophile attacking them.

Question:-

Why it is difficult for haloarenes to undergo nucleoplhilic subsituⁿ reaction?

Answer:-

Haloarenes are less reactive towards the nucleoplhilic substitution rxⁿ . This is due to following reasons :-

\(\red{\bigstar}\underline{\textsf{ Reason 1 :- Partial double bond character .}}\)

Halogen atom has one lone pair, and due to presence of π - σ - lp , resonance is established in the compound ( see attachment) . Due to resonance there is a partial double bond character in the carbon halogen bond , so it is difficult to break a double bond than a single bond.

\(\rule{200}2\)

\(\red{\bigstar}\underline{\textsf{ Reason 2 :- $\pi$ cloud .}}\)

When a nucleoplhile comes to attack , it is repelled by the π-cloud of the benzene ring.

\(\rule{200}2\)

\(\red{\bigstar}\underline{\textsf{ Reason 3 :- Phenyl cation .}}\)

If somehow the halogen atoms leaves the benzene ring ,being more electronegative than carbon , it takes away the electron , thus a positive charge is left on benzene ring and the phenyl cation so formed is very unstable .

\(\rule{200}2\)

The representation is showing potassium atom (K) and Chlorine atom (Cl) when it ought to show their ions i.e potassium ion (K⁺) and Chlorine ion (Cl¯)

When potassium chloride, KCl dissolves in water, it dissociate to produce potassium ion (K⁺) and Chlorine ion (Cl¯) as shown below:

KCl(aq) —> K⁺(aq) + Cl¯(aq)

The representation given in the question is only showing potassium atom (K) and Chlorine atom (Cl). This makes it wrong as dissolution of ionic compounds in water will results in the corresponding ions of the element that makes up the compound

Please see attached photo

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A standard unit is a unit that can be used everywhere as a basic unit of measurement.

350g = 0.350 kg =3.5 x \(10^{-2}\) kg

0.4 gl = 1514.16 ml = 1.5 x \(10^{3}\) ml

Inches, pounds, and pints are examples of standard units of measurement. Steps, hand spans, cubes, counters, and sweets are examples of non-standard units of measurement.

A standard unit is a unit that can be used everywhere as a basic unit of measurement.

The SI is a coherent system of measurement that begins with seven base units: the second (symbol s, the unit of time), the metre (m, length), the kilogram (kg, mass), the ampere (A, electric current), the kelvin (K, thermodynamic temperature), the mole (mol, substance amount), and the candela (cd, luminous intensity).

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The energy of the photon of light can be obtained as 6.27 * 10^-20 J.

We know that a photon has to to do with a particular unit of light. We know that light can be said to be composed of very tiny corpuscles and these corpuscles of light is what we call the photon of the light.

We can be able to us the equation that is derived by Max Plank to be able to get the value of the energy of the photon of light. Now we know that a photon of light can have an energy that is able to be obtained by;

E = hf

h = Plank's constant

f = Frequency

Then;

E = 6.6 * 10^-34 Js * 9.5 * 10^13 Hz

= 6.27 * 10^-20 J

Thus as we can see from the parameters in the question, the energy of the photon is 6.27 * 10^-20 J.

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Answer:

Albert Einstein proposed that a beam of light is not a wave propagating through space, but a collection of discrete wave packets—photons.

Explanation:

So the right answer is the first one.

Answer:The answer to this question comes from experiments done by the scientist Robert Boyle in an effort to improve air pumps. In the 1600's, Boyle measured the volumes of gases at different pressures. Boyle found that when the pressure of gas at a constant temperature is increased, the volume of the gas decreases. when the pressure of gas is decreased, the volume increases. this relationship between pressure and volume is called Boyle's law.

Explanation: So, at constant temperature, the answer to your answer is: the volume decreases in the same ratio as the ratio of pressure increases.

BUT, in general, there is not a single answer to your question. It depend by the context.

For example, if you put the gas in a rigid steel tank (volume is constant), you can heat the gas, so provoking a pressure increase. But you won't get any change in volume.

Or, if you heat the gas in a partially elastic vessel (as a tire or a soccer ball) you will get both an increase of volume AND an increase of pressure.

FINALLY if you inflate a bubblegum ball, the volume will be increased without any change in pressure and temperature, because you have increased the NUMBER of molecules in the balloon.

There are many other ways to change volume and pressure of a gas that are different from the Boyle experiment.

The statement best describes the diagram is the catalyzed reaction passes through C. Therefore, option A is correct.

An energy profile is a theoretical representation of a chemical reaction or process as a single energetic pathway as the reactants are transformed into products in theoretical chemistry.

The amount of relative potential energy in each step of a reaction is depicted by an energy diagram. Reactants, transition states, and products are typically depicted on energy diagrams. It may also include intermediates and activation energy, depending on the reaction.

There are two lines on the energy level diagram. The blue line denotes ground state energy, while the red line denotes excited state energy. The horizontal axis represents orbital energy, and the vertical axis represents total system energy.

Thus, option A is correct.

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Answer:

1.E25 it is the answer the answer to mass of 1×10^25 molecules of water​

Explanation:

this is just EXPLINATION find your answer using this

first divide the number of molecules by Avogadro's number 6.022*10^25

you will

l get no. of Moles of water

multiply the no. of Moles with mass of 1 Mole of water 18g per mole

if get answer you comment

you should try on your own you will understand better

Answer:

Only plant cells

Explanation:

This organelle helps plants photosynthesize. Humans do not do that.

After the reaction is complete, no nitrogen and no hydrogen molecules remain, and 8.00 x 1014 molecules of NH3 are produced.

In the equation, nitrogen and hydrogen react at a high temperature, in the presence of a catalyst, to produce ammonia, according to the balanced chemical equation:N2(g)+3H2(g)⟶2NH3(g)The coefficients of each molecule suggest that one molecule of nitrogen reacts with three molecules of hydrogen to create two molecules of ammonia.

So, to determine how many molecules of ammonia are produced when four nitrogen and nine hydrogen molecules are present, we must first determine which of the two reactants is the limiting reactant.

To find the limiting reactant, the number of moles of each reactant present in the equation must be determined.

Calculations:
Nitrogen (N2) molecules = 4Hence, the number of moles of N2 = 4/6.02 x 1023 mol-1 = 6.64 x 10-24 mol
Hydrogen (H2) molecules = 9Hence, the number of moles of H2 = 9/6.02 x 1023 mol-1 = 1.50 x 10-23 mol

Now we have to calculate the number of moles of NH3 produced when the number of moles of nitrogen and hydrogen are known, i.e., mole ratio of N2 and H2 is 1:3.

The mole ratio of N2 to NH3 is 1:2; thus, for every 1 mole of N2 consumed, 2 moles of NH3 are produced.
The mole ratio of H2 to NH3 is 3:2; thus, for every 3 moles of H2 consumed, 2 moles of NH3 are produced.
From these mole ratios, it can be observed that the limiting reactant is nitrogen.

Calculation for NH3 production:
Nitrogen (N2) moles = 6.64 x 10-24 moles
The mole ratio of N2 to NH3 is 1:2; therefore, moles of NH3 produced is 2 × 6.64 × 10−24 = 1.33 × 10−23 moles.

Now, to determine how many molecules of NH3 are produced, we need to convert moles to molecules.
1 mole = 6.02 x 1023 molecules
Thus, 1.33 x 10-23 moles of NH3 = 8.00 x 1014 molecules of NH3 produced.

To find the amount of each reactant remaining after the reaction is complete, we must first determine how many moles of nitrogen are consumed, then how many moles of hydrogen are consumed, and then subtract these from the initial number of moles of each reactant.

The moles of nitrogen consumed = 4 moles × 1 mole/1 mole N2 × 2 mole NH3/1 mole N2 = 8 moles NH3
The moles of hydrogen consumed = 9 moles × 2 mole NH3/3 mole H2 × 2 mole NH3/1 mole N2 = 4 moles NH3
Thus, the moles of nitrogen remaining = 6.64 × 10−24 mol – 8 × 2/3 × 6.02 × 10^23 mol-1 = 5.06 × 10−24 mol
The moles of hydrogen remaining = 1.50 × 10−23 mol – 4 × 2/3 × 6.02 × 10^23 mol-1 = 8.77 × 10−24 mol

Finally, the number of molecules of each reactant remaining can be calculated as follows:
Number of N2 molecules remaining = 5.06 × 10−24 mol × 6.02 × 10^23 molecules/mol = 3.05 × 10−1 molecules ≈ 0 molecules
Number of H2 molecules remaining = 8.77 × 10−24 mol × 6.02 × 10^23 molecules/mol = 5.28 × 10−1 molecules ≈ 0 molecules.

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The chemical reaction is shown by \(CaCl_{2} (aq) + K_{2} CO_{3} (aq) ----- > CaCO_{3}(s) + 2KCl(aq)\). The solvation of the KCl is shown in the image attached.

We know that a reaction is taking place when there is a change in the arrangement of the atoms that surround the reactants and then the products are formed. It is clear that there is a cleavage of the bods that surround the reactants and there is a recombination of these atoms as the products are formed. This recombination of the atoms now takes place in a different way so that we can be able to get new substances at the end of the reaction.

In this case we are looking at the kind of reaction that occurs between potassium carbonate and calcium chloride. One of the reactants is going to separate out of the solution and we would call it the precipitate. The other product is solvated by the water molecules.

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The energy in joules of one mole of photons of visible light having a wavelength of 4.11×10^2 nm? can be expressed as 2.9*10^5 J

From the question we were told to find the energy and the parameters that is needed to calculate these are;

c=3*10^8

h= 6.626 * 10^-34 J.s

1 mol photons = 6.023x10^23 photon

λ = 4.11×10^2 nm  = 4.11 × 10-7 meters

The parameters can be input  as Energy of one mole photon (E) = ( 6.023x10^23 * 6.626 * 10^-34 * 3*10^8)/ (4.11 × 10^-7)

=291302

=2.9*10^5 J

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