Which location would be best for solar energy

Answer:

Explanation:

k = 1.8 x 10⁻⁴ s⁻¹

no of moles initially = 2.45 x .17 = .4165 moles

initial moles a = .4165

k = (1 / t ) ln a / ( a - x )

a is initial moles , x is moles reacted .

a is initial moles , x is moles reacted .

time t = 195 min = 11700 s

1.8 x 10⁻⁴ = 1 / 11700 x ln .4165 /( .4165 - x )

2.106 = ln .4165 /( .4165 - x )

.4165 /( .4165 - x ) = e²°¹⁰⁶ = 8.215

.4165 = 3.42 - 8.215 x

8.215 x = 3.0035

x = .3656

moles of sucrose hydrolysed = .3656 moles.

Answer:

The wood sample has an age of approximately 22800 years.

Explanation:

The Becquerel (\(Bq\)) is a SI unit which describes radioactive activity related to decay of radioactive isotopes, which is equivalent to \(\frac{1}{s}\). The decay of radioactive isotope is described by the following ordinary differential equation:

\(\frac{dN}{dt} = -\frac{N}{\tau}\) (Eq. 1)

Where:

\(\frac{dN}{dt}\) - Disintegration rate, measured in \(\frac{1}{s}\).

\(N\) - Amount of remaining radioactive nuclei, dimensionless.

\(\tau\) - Time constant, measured in seconds.

By integration the solution of this differential equation is obtained:

\(\int {\frac{dN}{N} } = -\frac{t}{\tau}\int dt\)

\(\ln N = -\frac{t}{\tau} + C\)

\(N(t) = N_{o}\cdot e^{-\frac{t}{\tau} }\) (Eq. 2)

Let \(N_{1}\) and \(N_{2}\) different disintegration rates for Carbon-14 samples, so that:

\(N_{1} = N_{o} \cdot e^{-\frac{t_{1}}{\tau} }\) (Eq. 3)

\(N_{2} = N_{o}\cdot e^{-\frac{t_{2}}{\tau} }\) (Eq. 4)

If we divide (Eq. 4) by (Eq. 3), then:

\(\frac{N_{2}}{N_{1}} = \frac{N_{o}\cdot e^{-\frac{t_{2}}{\tau} }}{N_{o}\cdot e^{-\frac{t_{1}}{\tau} }}\)

\(\frac{N_{2}}{N_{1}} = e^{-\frac{1}{\tau}\cdot (t_{2}-t_{1}) }\) (Eq. 5)

If \(\Delta t = t_{2}-t_{1}\), we proceed to clear that variable:

\(\ln \frac{N_{2}}{N_{1}} = -\frac{1}{\tau}\cdot \Delta t\)

\(\Delta t = -\tau\cdot \ln \frac{N_{2}}{N_{1}}\) (Eq. 6)

Time constant is also a function of half-life (\(t_{1/2}\)), measured in seconds:

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

If \(t_{1/2} = 1.798\times 10^{11}\,s\), \(N_{1} = 14\,\frac{1}{s}\) and \(N_{2} = 0.875\,\frac{1}{s}\),  the age of the wood sample is:

\(\tau = \frac{1.798\times 10^{11}\,s}{\ln 2}\)

\(\tau = 2.594\times 10^{11}\,s\)

\(\Delta t = -(2.594\times 10^{11}\,s)\cdot \ln \left(\frac{0.875\,\frac{1}{s} }{14\,\frac{1}{s} } \right)\)

\(\Delta t \approx 7.192\times 10^{11}\,s\)

\(\Delta t \approx 22805.682\,yr\)

The wood sample has an age of approximately 22800 years.

The number of moles for the quanity 8.06 x\(10_{21\) atoms of Pt​ is approximately 2.61 grams.

To calculate the number of moles for a given quantity of atoms, we can use Avogadro's number and the molar mass of the element. Avogadro's number is 6.022 x 10²³ atoms/mol.

In this case, you have 8.06 x 10²¹ atoms of Pt. To find the number of moles, divide this quantity by Avogadro's number:

8.06 x 10²¹  atoms Pt / 6.022 x 10²³  atoms/mol = 0.0134 mol Pt

So, there are approximately 0.0134 moles of Pt in 8.06 x 10²¹  atoms of Pt.

The molar mass of Pt (platinum) is 195.08 g/mol. To convert the number of moles to grams, multiply the number of moles by the molar mass:

0.0134 mol Pt x 195.08 g/mol = 2.61 g Pt

Therefore, there are approximately 2.61 grams of Pt in 8.06 x10²¹  atoms of Pt.

In summary, the number of moles for the quantity 8.06 x 10²¹ atoms of Pt is approximately 0.0134 moles. This is equivalent to approximately 2.61 grams of Pt. Remember to use Avogadro's number and the molar mass to perform these calculations accurately.

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Here are the missing constitutional isomers with the molecular formula C4H10O:

• 2-Methyl-1,3-propanediol (CH3CHOHCH2CH3) Functional group: Alcohol (-OH)

• 1-Butanol (CH3CH2CH2CH2OH) Functional group: Alcohol (-OH)

And here's the complete list of all the constitutional isomers with the molecular formula C4H10O along with their functional groups:

• 1-Butanol (CH3CH2CH2CH2OH) Functional group: Alcohol (-OH)

• 2-Methyl-1,3-propanediol (CH3CHOHCH2CH3) Functional group: Alcohol (-OH)

• 1,2-Propanediol (CH3CH2OHCH2CH3) Functional group: Alcohol (-OH)

• Dimethyl ether (CH3OCH3) Functional group: Ether (-O-)

Note: In organic chemistry, constitutional isomers, also known as structural isomers, are compounds that have the same molecular formula but a different arrangement of atoms in the molecule.

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Answer:

I'll explain.

Explanation:

The molecules of two different elements, nitrogen and oxygen, make up about 99 percent of the air. The rest includes small amounts of argon and carbon dioxide. Oxygen is the life-giving element in the air. You can tell because they're on the periodic table which is a table for elements.

Explanation:

nitrogen and oxygen are the gases in the air which are elements you can simply say it by looking the periodic table

Answer:

To determine the change in mass of A over the given time period, we need to find the difference between the initial mass of A and the final mass of A.

From the given table, we can see that the initial mass of A at t = 0 (start time) is 12.4 g and the final mass of A at t = 60 minutes (end time) is 6.2 g.

Therefore, the change in mass of A over 60 minutes is:

Final mass of A - Initial mass of A

= 6.2 g - 12.4 g

= -6.2 g

The negative sign indicates that the mass of A decreased over time, which means that A underwent some kind of reaction or process that caused it to lose mass.

The change in mass of A over 60 minutes is -6.2 grams.

To determine the change in mass of A over 60 minutes, we need to compare the initial mass to the final mass.

From the given information, we can see that the mass of A decreases over time.

Let's calculate the change in mass.

Initial Mass of A: 12.4 g

Final Mass of A: 6.2 g

Change in Mass of A = Final Mass of A - Initial Mass of A

= 6.2 g - 12.4 g

= -6.2 g

The change in mass of A over 60 minutes is -6.2 grams.

Note that the negative sign indicates a decrease in mass.

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Answer:

26

Explanation:

The atomic number of an atom describes the number of protons within its nucleus. Since the ion has 26 protons, the atomic number must be 26.

Answer:

Es la tercera por qué cuando el material varía va cambiando de estado

Explanation:

Answer:

Chemical symbols are abbreviations that are used in chemistry to shorten names of chemical elements and chemical compounds.

2.007grams

The balanced reaction between aluminium and hydrochloric acid is given as:

Determine the moles of Hydrogen gas

According to stoichiometry, 2 moles of Aluminium produces hydrogen 3 moles of hydrogen:

Determine the mass of Aluminium

Hence the mass of Al required to produce 0.10grams of H2 is 2.007grams

Answer: CS and F

Explanation:

...ck-12

The pair of elements that would most likely undergo a violent reaction if combined with each other is; Choice D: Cs and F

According to the question;

Conventionally, alkali metals and halogens react violently.

More specifically; Caesium and Flourine react most violently because they are highly reactive members of the Alkali metals and halogens group respectively.

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Answer:

4200ml

Explanation:

Converting 3.1kg to g

3.1*1000= 3100g

Since density = mass/volume, then

volume = mass/ density

Therefore volume = 3100/0.74

= 4189.2ml

converting it to two significant figures

= 4200ml

Answer:

Fine chemicals are used as starting materials for specialty chemicals, particularly pharmaceuticals, biopharmaceuticals and agrochemicals. ... The term "fine chemicals" is used in distinction to "heavy chemicals", which are produced and handled in large lots and are often in a crude state.

Explanation:

Answer: The situation was Alexander Fleming made an experiment showing that the fungus produced a chemical that could kill bacteria. The scientific knowledge was based off Fleming's work, scientists produced the first antibitoic drugs.

It should reanalyze the data to determine whether their results contradicted your hypothesis if the experiment's findings did not support it. So shouldn't change the experiments, observations, or both in order to get results that support the theory.

An assumption or concept is given as a hypothesis for the purpose of debating it and testing if it might be true.

If the facts continually contradict the hypothesis, it is obvious that the hypothesis is not a viable explanation for the phenomenon you are examining. The proposed explanation is disproved, and we now look for a fresh hypothesis to explain the experimental results.

If the results confirm the prediction, the hypothesis is supported. Results can be used to disprove the hypothesis if the prediction was not confirmed by the data. By monitoring data and creating a new hypothesis using the new facts, you might need to come up with new questions. Make a finding and a forecast.

Thus, It should reanalyze the data to determine whether their results contradicted your hypothesis if the experiment's findings did not support it.

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Answer:

32.8g/mole

Explanation:

Given parameters:

Mass of sample of gas = 32.8g

Volume  = 22.4L

Unknown:

Molecular weight  = ?

Solution:

To solve this problem we must understand that at rtp;

             1 mole of gas occupies a volume of 22.4L

Number of mole of the gas  = 1 mole

 Now;

   Mass  = number of moles x molecular weight

    molecular weight  = \(\frac{mass}{molecular weight}\)    = \(\frac{32.8g}{1mole }\)      = 32.8g/mole

Answer:

[Ba²⁺] = 1.58 × 10⁻³ M

[Cl⁻] = 3.16 × 10⁻³ M.

Explanation:

Step 1: Calculate the molar concentration of BaCl₂

We have 3.50 mL (V₁) of a 0.00450 M (C₁) BaCl₂ solution and we dilute it to a final volume of 10.00 mL (V₂). We can calculate the final concentration of BaCl₂ by using the dilution rule.

C₁ × V₁ = C₂ × V₂

C₂ = C₁ × V₁ / V₂

C₂ = 0.00450 M × 3.50 mL / 10.00 mL = 1.58 × 10⁻³ M

Step 2: Calculate the molar concentrations of the Ba²⁺ and Cl⁻ ions

Let's consider the dissociation of BaCl₂.

BaCl₂(aq) ⇒ Ba²⁺(aq) + 2 Cl⁻(aq)

The molar ratio of BaCl₂ to Ba²⁺ is 1:1. The molar concentration of Ba²⁺ is 1/1 × 1.58 × 10⁻³ M = 1.58 × 10⁻³ M.

The molar ratio of BaCl₂ to Cl⁻ is 1:2. The molar concentration of Cl⁻ is 2/1 × 1.58 × 10⁻³ M = 3.16 × 10⁻³ M.

The order of reaction can be known from the rate equation.

The question is incomplete but I will try to explain the concept of order of reaction to you.

We have to note that when we talk about the order of the reaction what we mean is the order that we can be able to obtain from the stoichiometry of the reaction.

We do not only look at the reaction equation as we try to obtain the order of reaction but we rely so heavily on the empirical data that we can get from the reaction for the order of reaction in each specie.

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Answer:

When the dihedral angle = 60° or 300°, (gauche conformation) in butane, the methyl groups are farther apart and therefore the potential energy drops by 4.1 kcal/mol.

According to mole concept and Avogadro's number , there are 300.5 moles in 1.81×10²⁶ molecules of water.

Mole is defined as the unit of amount of substance . It is the quantity measure of amount of substance of how many elementary particles are present in a given substance.

It is defined as exactly 6.022×10²³ elementary entities. The elementary entity can be a molecule, atom ion depending on the type of substance. Amount of elementary entities in a mole is called as Avogadro's number.

As 1 mole= 6.023×10²³ molecules ,therefore 1.81×10²⁶ molecules= 1.81×10²⁶ /6.023×10²³=300.5 moles.

Thus, there are 300.5 moles in 1.81×10²⁶ molecules of water.

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Answer:

ok

Explanation:

Answer:

B

Explanation:

Sorry if wrong, brainliest if right please

The significance of the even number of protons and neutrons, in this case, is that it gives stability to the nucleus of an atom.

Protons are the positively-charged sub-atomic particle found in the nucleus of an atom. Protons are responsible for the mass of the atom of an element.

Protons exert a positive attractive force on the electrons found in orbitals around the atom.

Neutrons are neutral particles that are found together with the protons in the nucleus of an atom.

Neutrons together with protons account for the mass of an atom. Although neutrons are neutral, they contribute to the strong nuclear force that holds the nucleus of an atom together.

The correct ratio of protons and neutrons in the nucleus of an atom is required for the stability of the nucleus of an atom.

When the ratio of the protons and neutrons increases above 1 : 1.5, the nucleus of the atom becomes unstable.

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Answer:

You will typically get another chance to retake the exam

Answer:

well you either have a chance to retake the test if your teacher or just not let you take it at all. you have to pass 4 regents test including chemistry in order to get a regent diploma. so you can either retake or it you just failed it.

Answer:

The atomic size decreases with an increase in atomic number when we move from left to right.

Explanation: Hope it helps you:))))))

                      Have a great day.

The balanced equation is: 4 \(H_2S\)+ 3 \(O_2\)→ 4 \(SO_2\)+ 8 \(H_2O\)

The given chemical equation is unbalanced. To balance it, we need to adjust the coefficients in front of each chemical species until the number of atoms on both sides of the equation is equal.

The unbalanced equation is:

2 \(H_2S\)+ 3 \(O_2\)→ \(SO_2\)

Let's start by balancing the sulfur (S) atoms. We have two sulfur atoms on the left side and one sulfur atom on the right side. To balance the sulfur, we can place a coefficient of 2 in front of the \(SO_2\):

2 \(H_2S\)+ 3 \(O_2\)→ 2 \(SO_2\)

Now, let's balance the hydrogen (H) atoms. We have four hydrogen atoms on the left side (2 from each \(H_2S\)) and none on the right side. To balance the hydrogen, we can place a coefficient of 4 in front of the water (H2O) on the right side:

2 \(H_2S\)+ 3 \(O_2\)→ 2 \(SO_2\)+ 4 \(H_2O\)

Finally, let's balance the oxygen (O) atoms. We have six oxygen atoms on the right side (3 from \(O_2\) and 3 from 2 \(SO_2\)) and three on the left side (2 from \(H_2S\)). To balance the oxygen, we can place a coefficient of 3/2 in front of the O2:

2 \(H_2S\)+ (3/2) \(O_2\)→ 2 \(SO_2\)+ 4 \(H_2O\)

To remove the fractional coefficient, we can multiply all coefficients by 2:

4 \(H_2S\) + 3 \(O_2\)→ 4 \(SO_2\)+ 8 \(H_2O\)

Now the equation is balanced, with an equal number of atoms on both sides. The balanced equation is:

4 \(H_2S\)+ 3 \(O_2\)→ 4 \(SO_2\)+ 8 \(H_2O\)

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Answer:

Protons, neutrons, and electrons

Explanation:

protons- a stable subatomic particle occurring in all atomic nuclei, with a positive electric charge equal in magnitude to that of an electron, but of opposite sign.

neutrons- a subatomic particle of about the same mass as a proton but without an electric charge, present in all atomic nuclei except those of ordinary hydrogen.

electrons- a stable subatomic particle with a charge of negative electricity, found in all atoms and acting as the primary carrier of electricity in solids.

STEP-BY-STEP EXPLANATION:

Firstly, we need to define electronegativity

Electronegativity is defined as the tendency of an atom in a covalent bond to attract the bonding electrons.

The electronegativity of the halogen decreases down the group due to an increase in the radius of the atom resulting in the addition of outermost shells to the shell of the atom. As the number of shells increases, the force attraction between the nucleus and the electron moving around the shell decreases.