If the amount of energy required to break bonds in the reactants is more than the amount of energy released in forming bonds in the products, the chemical reaction is endothermic. (2 points) True

Explanation:

During condensation reaction, two molecules combine to form a single molecule with the loss of a small molecule; in dehydration reaction, this lost molecule is water.

The reaction is a small molecule formed from the atoms removed from a single reactant molecule this reaction is knowing as condensation reaction.

Essentially, this is the reverse process of vaporization. In order for water vapor to undergo the process of condensation, which is the change from a gaseous state to a liquid state, it is necessary for a reduction in its temperature to occur until it reaches the dew point or an increase in the pressure to which it is subjected.

In this case the condensation reaction are when two molecules combine to form a single molecule with the loss of a small molecule, in dehydration reaction, this lost molecule is water.

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          Since water served as the foundation for creating the metric system of measurement, density is defined as mass divided by volume (=m/v), meaning that one cubic centimeter (1cm3) of water weighs one gram (1g).

        The density of water is typically expressed in terms of grams per milliliter (1 g/ml) or grams per cubic centimeter (1 g/cm3).

85-milliliter outcome

2.988 Ounces

0.1868 Pounds

84.719 Grames

0.0847 Kilograms

Weight at 80°F(26.7°c)

         As the temperature drops, the water becomes denser. Water density reaches its maximum at 4 degrees Celsius.

        Like a solid, a liquid's density is determined by dividing its mass by its volume, or D = m/v. Water has an average density of one gram per cubic centimeter. No matter the size of the sample, a substance has a constant density.

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Answer:

Explanation:

The momentum of an object can be found by using the formula

momentum = mass × velocity

From the question we have

momentum = 0.00001346 * 790204000

= 10636.14584

We have the final answer as

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The chemical equation for the reaction of Sn2(aq) to Sn4(aq) in an acidic or basic solution is:Sn2(aq) + 2e- → Sn4(aq)

What is the chemical equation for the reaction of Sn2(aq) to Sn4(aq) in an acidic or basic solution?

In this reaction, Sn2(aq) is being oxidized to Sn4(aq) by losing two electrons (2e-). The oxidation state of Sn increases from +2 to +4.

It's important to note that the phases of the substances involved in the reaction are not specified in the question.

However, based on the naming conventions, "(aq)" indicates that the substances are in aqueous solution, meaning they are dissolved in water.

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In general, covalent bonds form between nonmetals, ionic bonds form between metals and nonmetals, and metallic bonds form between metals.

As a general rule of thumb, compounds that contain a metal binding with both a non-metallic or a semi-metallic will show ionic bonding. Compounds that are composed of best non-metals or semi-metals with non-metals will show covalent bonding and may be categorised as molecular compounds.

those molecules that encompass charged ions with opposite prices are referred to as IONIC. these ionic compounds are generally solids with excessive melting points and conduct electric contemporary. Ionic compounds are typically formed from metal and a non-metal elements.

Covalent bonding normally happens between nonmetals. Covalent bonding is the sort of bond that holds together the atoms inside a polyatomic ion. It takes electrons to make a covalent bond, one from every bonding atom.

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Music is both an art and science which employs the various properties of sound waves to produce melodious sounds.

Music is a process of combining sounds such that they produce a meaningful pattern and melody pleasant to the ears.

Music is both an art and a science.

Music is an art as it is a firm of expression of ideas and thoughts.

Music is a science as applies the knowledge of sound waves to produce melodious sounds. Different musical instruments have been produced using scientific knowledge.

Therefore, Music is both an art an science which employs the various properties of sound waves to produce melodious sounds.

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Answer:

An ion is a charged version of an atom that is formed by loss or gain of electrons compared to the atom.

Explanation:

Atoms are neutral; they contain the same number of protons as electrons. By definition, an ion is an electrically charged particle produced by either removing electrons from a neutral atom to give a positive ion or adding electrons to a neutral atom to give a negative ion.

An ion is a charged version of an atom that is formed by loss or gain of electrons compared to the atom.

An atom or molecule is said to be an ion if at least one of its valence electrons have been acquired or lost, giving it a net either a positive or a negative electrical charge. In other terms, a chemical species has an unbalanced quantity of protons compared to electrons.

Because there are more protons than electrons in a given species, cations are ions with a net positive charge. Ions with a negative charge that is net are known as anions. Protons are outnumbered by electrons in anions. An ion is a charged version of an atom that is formed by loss or gain of electrons compared to the atom.

Therefore,  an ion is a charged version of an atom that is formed by loss or gain of electrons compared to the atom.

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Answer:

7.20 X 10^-2 gm

Explanation:

Aqueous hydrobromic acid HBr will react with solid sodium hydroxide NaOH to produce aqueous sodium bromide NaBr and liquid water H2O. Suppose 3.24 g of hydrobromic acid is mixed with 2.3 g of sodium hydroxide. Calculate the maximum mass of water that could be produced by the chemical reaction. Be sure your answer has the correct number of significant digits.

HBr(aq) + NaOH (S)-----------> NaBr (aq) + H20

mol wt  of HBr = 1 + 79.9  = 80.9

3,24 gm of HBr = 3.24/80.9 = 0.00400moles = 4.00 X 10^-3 moles

mol wt of NaOH =  23.0 + 16.0 +1.01 = 40.0 gm

2.3 gm = 2.3/40.0 = 0.058 moles =5.8 X 10^-2

the reaction of HBr and NaOH is 1:1.  

there are not enough moles of HBr to neutralize all of the NaOH. so

only 4.00X10 ^-3  moles of H2O can be produced

mol weight of H2O is (2 X 1.01) + 16.0 = 18.0

The maximum mass of H2O that can be produced is

18.0 X 4.00X10^-3 = 72.0/1000 =7.20 X 10^-2 gm

Answer:

the answer is the third figure from left

Answer:

See below

Explanation:

The electoral college ensures that the most populated states can't always pick the next president.  States that have the most population would be able to skew the elections by cancelling out several other less populated state's voters.  One large city could cancel out every vote from the state of Rhode Island.

With the electoral college, each state has a given number of votes to cast for a president.  Some states can split their college votes while others cast all votes for the same candidate.

If you look at Pennsylvania in 2020 as an example, they have 20 electoral votes.  Pennsylvania does not split their votes so all go to just one candidate.  In the measurement of votes, it might show that candidate A got 51% of the votes and candidate B got 49%.  The 20 electoral votes would all go to candidate A and candidate B gets nothing.  Candidate B may have gotten millions of individual votes within the state but that no longer matters.  Candidate A won the state so gets all 20 electoral votes.  If the country went by the individual vote, Candidate B would keep all those votes he got from the 2 or 3 large cities in Pennsylvania.

It would be easy to see that if you only counted the individual votes (called the popular vote), a candidate could compile more votes from all of the states even though the candidate did not win that state by the majority vote.  The electoral college makes sure that a candidate cannot carry those votes from the state that they lost.

If elections were based on this popular vote, then most of the states with small populations would barely affect the outcome of an election.  The popularity vote would ensure that the states with the largest populated cities would always control who gets elected.

It would especially be detrimental in todays age since most large cities are almost always voting for just one party.

Generally, Alkenes are prepared using the Wittig reaction.

Any compound whose molecules contain carbon and hydrogen or a compound that is derivative of it is known as an organic compound.

An organic compound is also known as hydrocarbon

Organic chemistry is the branch of science that deals with the study of the structure, properties, and reactions of hydrocarbons and their derivatives.

In the wittig reaction, carbonyl compounds are converted into alkenes using phosphorus ylides.

Phosphorus ylides are made from phosphonium salt and a base.

This ylide reacts with carbonyl compound to form an alkene.

Wittig reaction:

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Answer:

Should be number 4, quartz.

Explanation:

Quartz is rougher than calcite, therefore it's able to scratch it.

An orbital is a region in space where there is a high probability of finding an electron.

In an atom there are orbitals. Orbitals are mathematical probability functions that describe regions in space where an electron could be found according to the wave mechanical model of the atom.

In the 3p sublevel, there are three orbitals. In the 2s sublevel, there is only one orbital. In the 4f sublevel, there are seven orbitals. In the 5d sublevel, there are five orbitals. In the third principal level, there are three nine orbitals in the fifth energy level, there are 25 orbitals. Note that in principal level, there are n^2 orbitals where n is the principal energy level.

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The correct statement is B. Three molecules of N₂ should be produced during the decomposition. :)

Answer: b

Explanation: I took the quiz

cell membrane - phospholipd bilayer

pigmented - chloroplasts

chloroplasts - oval shaped with two membranes

rectangular or cubed - plant cell

nucleus - control centre

hope that's what you are looking for

Answer:

Atoms are less compact when they dissolve, it can’t be C and D

Explanation:

I’m not giving you the answers

When salt is dissolved in water, the process of dissolving makes the electrons in their atoms free to move.

We know that water is a covalent molecule hence its dissociation does not yield a significant conductivity. Also, solid ionic substances are poor conductors of electricity.

When salt is dissolved in water, the process of dissolving makes the electrons in their atoms free to move.

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Answer:

plate tectonics, theory dealing with the dynamics of Earth’s outer shell—the lithosphere—that revolutionized Earth sciences by providing a uniform context for understanding mountain-building processes, volcanoes, and earthquakes as well as the evolution of Earth’s surface and

Explanation:

The Henry's Law constant for argon if the partial pressure of argon in air is 0.0984 atm is 1.52 mole/L *atm.

Henry's regulation states that at a regular temperature, the amount of a given fuel that dissolves in a liquid is immediately proportional to the partial pressure of that gas in equilibrium with that liquid. Henry's regulation states that the solubility of a fuel in a liquid is immediately proportional to the pressure of the gas.

Pressure of argon =  p = 0.0984 atm

Molar solubility at 25°C, S = 0.150 mol/l

Calculating the Henry's Law constant,

     S =KP

       K =S/P

         0.150/0.0984

         = 1.52 mol/L atm

Hence the  Henry's Law constant (K) = = 1.52 mol/L atm

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Therefore, a reaction would be exothermic if the sum of a enthalpies of a reactants is higher than the enthalpies of a products. A reaction is endothermic if the enthalpy on the products side is higher.

Correct option is, A.

Hence, a reaction is exothermic as well as its enthalpy will indeed be negative if it releases less energy than it takes in. See this as a certain quantity of heat evaporating from (or being removed from) the reaction. Endothermic reactions have positive enthalpies because they absorb or use more energy than they produce.

Laundry detergent powder can be quickly exothermically reacted by being dissolved in a small amount of water in your hand. Dissolving potassium chloride (offered as a salt replacement) in water in your hand is one simple endothermic reaction.

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Answer:

The balanced net ionic equation of mixed AgNO3 and MgCl2 solutions is Mg2+(aq) + 2Cl–(aq) → MgCl2(s). AgNO3 and MgCl2 are both ionic compounds and the reaction is a double replacement reaction. AgNO3 is composed of silver ions (Ag+) and nitrate ions (NO3–) while MgCl2 is composed of magnesium ions (Mg2+) and chloride ions (Cl–). When these two compounds are mixed together, the silver and nitrate ions react with the magnesium and chloride ions to form the silver chloride (AgCl) and magnesium chloride (MgCl2) products.

To determine the mass of H₂O produced after a combustion reaction, you will need to use the law of conservation of mass and stoichiometry.

In order to use the law of conservation of mass and stoichiometry, you should do the following:

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Determining the density of zinc chloride using water can be done by measuring the mass of a known volume of zinc chloride, and then dividing it by the volume of the sample.

First, a sample of zinc chloride should be accurately weighed and the mass should be recorded. Next, the sample should be placed into a graduated cylinder containing a known amount of water. The water level should then be recorded, and the difference between the initial water level and the water level after adding the sample can be used to calculate the volume of the sample.

Finally, the mass of the sample should be divided by the volume in order to calculate the density of the zinc chloride. The density of the zinc chloride can then be compared to the accepted value to determine if it is accurate.

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Answer:

The specific heat of the unknown metal is 1.26*10⁻⁴ \(\frac{kcal}{g* C}\)

Explanation:

Calorimetry is the measurement and calculation of the amounts of heat exchanged by a body or a system.

Sensible heat occurs when heat added or removed from a substance causes a temperature change in it and is calculated by:

Q = c * m * ΔT

Where Q is the heat exchanged by a body of mass m, constituted by a substance of specific heat c and where ΔT (Tfinal - Tinitial) is the variation in temperature

In this case:

Replacing:

2.93 kcal= c* 183.4 g*126.3 °C

Solving:

\(c=\frac{2.93 kcal}{183.4 g* 126.3 C}\)

c= 1.26*10⁻⁴ \(\frac{kcal}{g* C}\)

The specific heat of the unknown metal is 1.26*10⁻⁴ \(\frac{kcal}{g* C}\)

Answer:

180

Explanation:

proton = 80

electron = 80

neutron = 100

Note:- the atomic number of an element is the number of protons/electrons in the atomic shell

(protons = electrons)

Mass number = number of protons/electrons + number of neutrons

MN= NP+ NN

MN = 80 + 100

MN= 180

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