select true or false: more energy is required to break a bond with an order of 3/2 than is required to break a bond of order 2.

Answer:climate change

Explanation:

4V  is the necessary voltage to power the electrolysis of molten sodium chloride.

To create sodium metal and chlorine gas, molten (liquid) sodium chloride can be electrolyzed. A Down's cell is the name of the electrolytic cell utilised in the procedure. The liquid sodium ions in a Down's cell are converted to liquid sodium metal at the cathode. Liquid chlorine ions are oxidised to chlorine gas at the anode. Below is an illustration of the reactions and cell potentials:

oxidation: \(2Cl^{-} (l)\) → \(Cl_{2} (g)\) + \(2e^{-}\)                                  E°= -1.36V

reduction: \(Na^{+} (l) + e^{-}\) → \(Na (l)\)                                    E°= -2.71V

overall : \(2Na^{+} (l) + 2Cl^{-} (l)\) → \(2Na(l) +Cl_{2} (g)\)              E°\(_{cell}\) = -4.07V

For this electrolysis to take place, the battery needs to supply more than 4 volts. The only means to obtain pure sodium metal is by this reaction, which also serves as a significant source of chlorine gas generation. Swimming pools and other surfaces are frequently cleaned and disinfected with chlorine gas.

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The percent concentration of the solution containing 90 grams of NaOH in 750 mL of buffer is 300%.

Mass of NaOH = 90 grams

Molecular weight of NaOH = 40 g/mol

The volume of buffer solution = 750 mL

Converting the volume to litres -

= 750 mL

= 750/1000

= 0.75 L

Calculating the number of moles of NaOH -

= Mass / Molecular weight

= 90  / 40

= 2.25 mol

Calculating the percent concentration -

= (Amount of solute / Total solution volume) x 100

= (2.25 / 0.75 ) x 100

= 3 x 100

= 300

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Answer: 2

Explanation: For the equation to be balanced, the elements or compounds from the reactant and product sides must be equal.

Everything else was equal except the Na and Cl which on the reactant side it had 2 molecules each and on the product side 1 molecule.  

All you have to do is add 2 Infront of NaCl on the product side to make the reaction balance.

Nitric acid is a strong acid while the nitrate ion is a very weak base. Nitric acid is able to consume hydroxide ions. However, the nitrate ions present are unable to consume hydronium ions. As a result, the set of compounds does not form a buffer solution.

A mole is the number of entities present in a substance, such as atoms, molecules, or ions. A mole of any substance is defined as 6.0221023 molecules. Just as we use a standard value to quantify diverse things, such as 1 dozen = 12 items, we utilise the mole to quantitatively calculate the size of the tiniest creatures.

The number of atoms in 12g (0.012 kg) of 12C isotope is equal to the number of particles in 1 mole of the substance. One of the most crucial facts to remember is that the mole of a material always includes the same number of entities regardless of the substance.

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Answer:

nucleotides

Explanation:

Hope this helps :D

Answer:

dna is made up of nucleotides!

Explanation:

hope this helped

Answer:

i can't answer sorry

Explanation:

i had confused

Answer:

Sometimes forces act to pull sections of the Earth's crust apart. At other times they are forced together. All this movement can cause rocks that were once underground to be brought up to the Earth's surface. This process is called uplift.

Explanation:

Hope this helped you out have a good day

Answer:

An atom of Sulfur

Explanation:

i did a Quick search and im trying to get pass the "help a person first"

Answer:

• A collection of atoms of Sulfur

Explanation:

I'll assume the notation is written as \(S_{8}\).  A subscript after an element symbol represent the number of individual atoms of the symbol.  In this case \(S_{8}\) is telling us we have 8 sulfur atoms that are somehow connected to each other.  That is in contrast with 8S, which means we have 8 different sulfur atoms.  A chemical formaula, such as \(CH_{4}\) tells us we have a molecule containing 1 carbon atom and 4 hydrogen atoms.

The answer would be mantle rocks i.e., the partial melting of mantle rocks will yield basaltic magma, diorite granite peridotile rhyolite andesite.

The mantle rocks are partially melted because the mantle is comprises of many various kinds of minerals, it does not melt accordingly. As minerals with lesser melting points converted into liquid magma, those with inflated melting points endure as solid crystals. This method is called as partial melting.

The properties that aim partial melting Rocks is because of decompression, heat input, or addition of a flux.

Mantle rocks are also known as semi molten rocks , generally silicates are found there.

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The mass ratio of magnesium in magnesium oxide (MgO) can be calculated by dividing the mass of magnesium (0.712 g) by the mass of magnesium oxide (1.18 g).

To find the mass ratio, we divide the mass of the element of interest (magnesium) by the mass of the compound (magnesium oxide). In this case, the mass of magnesium is given as 0.712 g and the mass of magnesium oxide is given as 1.18 g. So, the mass ratio of magnesium is calculated as follows:
Mass ratio = mass of magnesium / mass of magnesium oxide
= 0.712 g / 1.18 g
Calculating this gives us the mass ratio of 0.604.
Therefore, the mass ratio of magnesium in magnesium oxide is approximately 0.604.

The mass ratio of magnesium in magnesium oxide can be found by dividing the mass of magnesium by the mass of magnesium oxide. In this case, the mass of magnesium is given as 0.712 g and the mass of magnesium oxide is given as 1.18 g. By dividing these two values, we get a mass ratio of approximately 0.604. This means that for every gram of magnesium oxide, there are approximately 0.604 grams of magnesium. This mass ratio is useful in determining the composition of compounds and can be used in various chemical calculations.

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Given data:H2O vapor content: 13 gramsH2O vapor capacity: 52 grams at 25 degrees Celsius 13 grams at 10∘C52 grams at 30∘CFormula used to find the dew point:$$\dfrac{13}{52}=\dfrac{(A*3\pi)/(ln100)}{(17.27-A)}$$$$\frac{1}{4}=\dfrac{(A*3\pi)/(ln100)}{(17.27-A)}$$

Where A is the constantDew Point:It is the temperature at which air becomes saturated with water vapor when the temperature drops to a point where dew, frost or ice forms. To solve this question, substitute the given data into the formula.$$13/52=\dfrac{(A*3\pi)/(ln100)}{(17.27-A)}$$$$13(17.27-A)=3\pi A(ln100)$$By simplifying the above expression, we get$$A^2-17.27A+64.78=0$$Using the quadratic formula, we get$$A=9.9,7.4$$

The dew point is 7.4 since it is less than 10°C.More than 100:The term "More than 100" has not been used in the question provided.

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Explanation:

The graphite anodes are suspended into the brine. During electrolysis, Cl ions are oxidized at the anode and chlorine gas goes out of the cell, while sodium ions are reduced at the mercury cathode forming sodium amalgam. ... Hydrogen gas is obtained as a by–product at the cathode.

The concept of molar mass of substance help us to determine the required mass of Magnesium, Mg in grams. The weight of Mg reacted in the reaction is equals to the 4.82 grams.

We have the following chemical reaction,

2Mg + O₂ → 2MgO

The atomic masses of magnesium atom, Mg and oxygen atom O are 24.3 g/mol and 16 g/mol respectively. So, the molar mass of MgO substance = 24.3 + 16

= 40.3g/mol

Mass of MgO, m = 8.0 g

Molar mass of substance is defined as the grams per mol that is mass of substance divided by moles of substance, M = mass in g/no. of moles

=> Molar mass of MgO = mass in g/no. of moles

=> moles of MgO = mass/molar mass

= 8g/40.30g/mol = 0.1985 moles MgO produced. According to reaction, 2 mole MgO is produced by 2 mole of Mg. That's 0.1985 mole of MgO will be produced by

= (2/2)× 0.1985

= 0.1985 moles Mg

Mass of Mg = moles×molar mass

= 0.1985× 24.3 = 4.82 g

Hence, required mass is 4.82 g.

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The first step to answer this question is to find the number of moles of Ca(NO3)2 that contain 2.50x10^-2 moles of nitrate ion. According to the chemical formula of Ca(NO3)2, there are 2 moles of nitrate ions per mol of Ca(NO3)2:

The next step is to use the concentration of the Ca(NO3)2 solution to find the volume that contains this number of moles:

Finally, convert this volume to mL:

It means that the correct answer is b. 250mL.

The concentration of Ca(OH)2 in the solution is approximately 1.33 x 10^(-6) M.

To find the concentration of Ca(OH)2 in a solution with a pH of 8.57, we need to use the concept of pOH, which is the negative logarithm of the hydroxide ion concentration ([OH-]). The pOH can be calculated by subtracting the pH from 14, which gives us 14 - 8.57 = 5.43.

Since Ca(OH)2 produces two OH- ions for every molecule of Ca(OH)2 that dissolves, the concentration of OH- ions will be twice the concentration of Ca(OH)2. Thus, we have [OH-] = 2x, where x represents the concentration of Ca(OH)2.

Taking the antilogarithm of the pOH, we find that [OH-] = 10^(-pOH) = 10^(-5.43).

Since [OH-] = 2x, we can write 2x = 10^(-5.43) and solve for x.

x = (10^(-5.43))/2 ≈ 1.33 x 10^(-6) M

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Answer:

The release of energy with the fusion of light elements is due to the interplay of two opposing forces: the nuclear force, which combines together protons and neutrons, and the Coulomb force, which causes protons to repel each other.

Answer:

The volume will remain the same.

Explanation:

The volume of a given gas sample is directly proportional to its absolute temperature at constant pressure (Charles's law)

There are so many gas laws like Charles's law, Avogadro’s law, Boyle 's law and many more. If pressure of gas is kept constant, then volume of the gas will be increasing.

According to Charles's law, gas expands on heating. At constant pressure, volume well be directly proportional to temperature.

According to ideal gas equation

PV=nRT

On keeping pressure constant the following equation can be deduced to Charles's law as

V₁÷T₁=V₂÷T₂

where,

V₁= initial volume

V₂= final volume

T₁=initial temperature

T₂=final temperature

According to Charles's law, the volume of a given gas sample is directly proportional to its absolute temperature at constant pressure.

Therefore, if pressure is kept constant, then volume of the gas will be increasing.

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.

A drop of medication is delivered to a patient every 45 s . if 5 drop of this medication occupy 1.0 ml then the medication will be delivered in 15 sec is 4 ml.

According to the question,

1 drop delivered = 45 sec = 0.75 min

and, 5 drop contains = 1.0 ml

then , 1 drop = 1 / 5 ml = 0.2 ml

this mean, 0.2 ml in = 0.75 min

so, how much ml in 1 min,

1 min = 0.2 ml / 0.75

        = 0.266 ml

now, how many ml in 15 min ,

in 15 min = 0.2667 ml × 15

              =  4 ml

Thus, A drop of medication is delivered to a patient every 45 s . if 5 drop of this medication occupy 1.0 ml then the medication will be delivered in 15 sec is 4 ml.

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Taking into account the reaction stoichiometry, 0.14175 grams of H₂O are formed when a 17.50 mL sample of a 0.150 M solution of H₃PO₄ reacts with excess Ba(OH)₂.

In first place, the balanced reaction is:

2 H₃PO₄ + 3 Ba(OH)₂  → Ba₃(PO₄)₂ + 6 H₂O

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:

The molar mass of the compounds is:

Then, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:

Molar concentration or molarity is a measure of the concentration of a solute in a solution and indicates the number of moles of solute that are dissolved in a given volume.

The molarity of a solution is calculated by dividing the moles of solute by the volume of the solution:

molarity= amount of moles÷ volume

In this case, you know for the reactant H₃PO₄:

Replacing in the definition of molarity:

0.150 M= amount of moles÷ 0.0175 L

0.150 M× 0.0175 L= amount of moles

0.002625 moles= amount of moles

So, 0.002625 moles of H₃PO₄ react.

The following rules of three can be applied: if by reaction stoichiometry 2 moles of H₃PO₄ form 108 grams of H₂O, 0.002625 H₃PO₄ form how much mass of H₂O?

\(mass of H_{2}O=\frac{0.002625 moles of H_{3}PO_{4} x108 grams of H_{2}O}{2moles of H_{3}PO_{4}}\)

mass of H₂O= 0.14175 grams

Finally, 0.14175 grams of H₂O are formed when a 17.50 mL sample of a 0.150 M solution of H₃PO₄ reacts with excess Ba(OH)₂.

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Answer:

pOH = 8.19

Acidic solution (pH < 7.0)

Explanation:

The pOH of the solution is defined as:

pOH = - log [OH⁻]

Since we have [OH⁻] = 6.5 x 10⁻⁹ M, we calculate the pOH as follows:

pOH = - log (6.5 x 10⁻⁹) = 8.19

To know if the solution is acidic, neutral or basic, we have to calculate the pH from the value of pOH:

pH + pOH = 14

⇒ pH = 14 - pOH = 14 - 8.19 = 5.81

The solution is acidic because pH < 7.0.

The oxidation of co (carbon monoxide) to less-harmful co₂ (carbon dioxide) and the oxidation of hc (unburned hydrocarbons) to co₂ (carbon dioxide) and h₂o (water).

Oxidation is that the loss of electrons during a reaction by a molecule, atom or ion. Oxidation occurs when the oxidation number of a molecule, atom or ion is increased. the other process is called reduction, which occurs when there's a gain of electrons or the oxidation state of an atom, molecule, or ion decreases.

The term oxidation was first employed by Antoine Lavoisier to signify the reaction of a substance with oxygen. Much later, it had been realized that the substance, upon being oxidized, loses electrons, and therefore the meaning was extended to include other reactions in which electrons are lost, no matter whether oxygen was involved.

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Answer:

\(Y=67.6\%\)

Explanation:

Hello there!

In this case, for such stoichiometry problem, we can see just water is on the reactants side, it means that for the calculation of the theoretical yield of oxygen, we use the 2:1 mole ratio between them and their molar masses of 18.02 and 32.00 g/mol respectively:

\(m_{O_2}^{theoretical}=17.0gH_2O*\frac{1molH_2O}{18.02gH_2O}*\frac{1molO_2}{2molH_2O}*\frac{32.00gO_2}{1molO_2}\\\\ m_{O_2}^{theoretical}=15.1gO_2\)

Finally, we divide the actual yield of 10.2 g of oxygen by the theoretical yield of 151 g of oxygen to obtain:

\(Y=\frac{10.2g}{15.1g}*100\%\\\\Y=67.6\%\)

Regards!

During evaporation, particles of the liquid absorb energy from the surface of the palm to compensate for the loss of energy, making the surroundings cool. The acetone, petrol or perfume take this latent heat of vaporisation from our palm. The palm loses heat and feels cold.

Answer:

When we put some acetone or petrol or perfume on our palm, it evaporates. During evaporation, particles of the liquid absorb energy from the surface of the palm to compensate for the loss of energy, making the surroundings cool. This results in the palm becoming colder.

Explanation:

Answer:

The mass of oxygen that reacted is approximately 1.6 grams of oxygen

Explanation:

The given information are;

The mass of magnesium in the reaction = 2.43 grams

The final mass of the magnesium oxide = 4.12 grams

The chemical equation for the reaction is given as follows;

2Mg + O₂  →  2MgO

From which we see that two moles of magnesium, Mg, reacts with one mole of oxygen gas molecule, O₂, to produce two moles of magnesium oxide, MgO

The number of moles of magnesium present, \(n_{Mg}\), is given as follows;

\(n_{Mg} = \dfrac{Mass \ of \, magnesium}{Molar \ mass \ of \, magnesium} = \dfrac{2.43}{24.305} \approx 0.1 \ moles\)

By the given chemical equation, 2 moles of magnesium reacts with one mole of O₂, therefore;

1 mole of magnesium will react with 1/2  moles of oxygen which is 0.5 moles of oxygen also;

0.1 mole of magnesium will react with 0.05 moles of oxygen

The mass of one mole of oxygen = The molar mass of oxygen = 32 g/mol

The mass of oxygen in the reaction = The number of moles of oxygen × The molar mass of oxygen

The mass of oxygen in the reaction = 0.05 × 32 = 1.6 grams

Also from the molar mass  of MgO which is 40.3044 g/mol, we have;

The mass fraction of oxygen = 16/40.3044 = 0.39698 ≈ 0.4

The mass of oxygen = 0.39698 × 4.12 = 1.636 g

Therefore, the mass of oxygen in the reaction is approximately 1.6 grams.

Answer:

Brass

Explanation:

Brass is an alloy of copper and zinc, in proportions which can be varied to achieve varying mechanical and electrical properties.

The use of a computational program can help to accurately determine thermodynamic properties of a reaction and provide insights into its behavior over different temperature ranges.

The conversion of fumarate ion to malate ion is catalyzed by the enzyme fumarase, and the average standard reaction enthalpy ΔrHo over the given temperature range can be calculated using the provided data and an appropriate computational program. To do this, one can plot the given data points and use linear regression to obtain the slope, which corresponds to ΔrHo.

Once ΔrHo is determined, it is possible to calculate ΔrCP and A,So for each temperature using appropriate thermodynamic equations. These calculations can be used to comment on the validity of the approximation that ΔrHo is independent of temperature over the given range.

Overall, the use of a computational program can help to accurately determine thermodynamic properties of a reaction and provide insights into its behavior over different temperature ranges.

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Answer:

CH4 + O2 = CO2 + H2O.

Answer:

CH4 + O2 = CO2 + H2O.

Explanation: