A 15.0 mL solution of Sr(OH)2 is neutralized with 29.8 mL of 0.350 M
HCI. What is the concentration of the original Sr(OH)2 solution?

To calculate the atoms of an element in a given molecule, we need to multiply stoichiometry by the number that is written on the foot of that element. Therefore,  coefficient of Al in balanced equation is 2.

Balanced equation is the one in which the total number of atoms of a species on reactant side is equal to the total number of atoms on product side. The mass of the overall reaction should be conserved. There are so many types of chemical reaction reaction like combination reaction, displacement reaction.

The other characteristic of balanced reaction is that physical state should be written with each compound or molecule on reactant and product side. Physical state should be written in brackets. s means solid, l means liquid, g means gas.

Al(s)→Al³⁺(aq)+3e⁻      × 2

Zn²⁺(aq)+2e⁻−→Zn(s)  × 3

adding the two equations we get balanced equation as

2Al+3Zn²⁺→ 2Al³⁺ + 3Zn(s)

The coefficient of Al in balanced equation is 2.

Therefore,  coefficient of Al in balanced equation is 2.

Learn more about the balanced equation, here:

https://brainly.com/question/7181548

#SPJ1

Answer:

I has 2 double carbon carbon bonds

Explanation:

The temperature change of a substance when it absorbs or loses energy can be calculated using the specific heat capacity of the substance. The specific heat capacity of water is approximately 4.18 J/(g°C), which means that it takes 4.18 joules of energy to raise the temperature of 1 gram of water by 1 degree Celsius.

To calculate the temperature change of the water sample when 50 joules of energy is added, we need to use the following equation:

q = m * c * ΔT

where q is the amount of energy absorbed by the water, m is the mass of the water sample, c is the specific heat capacity of water, and ΔT is the resulting temperature change.

Rearranging the equation to solve for ΔT, we get:

ΔT = q / (m * c)

Plugging in the values, we get:

ΔT = 50 J / (m * 4.18 J/(g°C))

We need to know the mass of the water sample to calculate the temperature change. Let's assume a mass of 10 grams:

ΔT = 50 J / (10 g * 4.18 J/(g°C))

ΔT = 1.2°C

Therefore, if 50 joules of energy is added to a 10-gram sample of water, the resulting temperature change will be approximately 1.2 degrees Celsius.

The mass of hydrogen needed to produce 51.0 grams of ammonia is  ≈ 9.07 grams.

To determine the mass of hydrogen required to produce 51.0 grams of ammonia (NH3) using the Haber process, we need to calculate the stoichiometric ratio between hydrogen and ammonia.

From the balanced chemical equation:

3 H₂(g) + N₂(g) → 2 NH₃(g)

We can see that for every 3 moles of hydrogen (H₂), we obtain 2 moles of ammonia (NH₃).

First, we need to convert the given mass of ammonia (51.0 grams) to moles. The molar mass of NH₃ is 17.03 g/mol.

Number of moles of NH₃ = Mass / Molar mass

                     = 51.0 g / 17.03 g/mol

                     ≈ 2.995 moles

Next, using the stoichiometric ratio, we can calculate the moles of hydrogen required.

Moles of H₂ = (Moles of NH₃ × Coefficient of H₂) / Coefficient of NH₃

           = (2.995 moles × 3) / 2

           ≈ 4.493 moles

Finally, we can convert the moles of hydrogen to mass using the molar mass of hydrogen (2.02 g/mol).

Mass of H₂ = Moles × Molar mass

          = 4.493 moles × 2.02 g/mol

          ≈ 9.07 grams

Therefore, approximately 9.07 grams of hydrogen is needed to produce 51.0 grams of ammonia in the Haber process.

Know more about the mass of hydrogen here:
https://brainly.com/question/14083730

#SPJ8

Answer:

4 millllllermeeters jb

An acid anhydride is a type of chemical compound that is derived by the removal of water molecules from an acid, it is an organic compound that has two acyl groups bonded to the same oxygen atom. Its formula is: R(CO)O(CO)R. Therefore the answer for this compound is letter B

Answer:

All of the listed factors can affect the potency of a drug.

Explanation:

All of the listed factors can affect the potency of a drug. Let's discuss each one:

The amount: The potency of a drug can be influenced by the dosage or amount administered. Generally, a higher amount of a drug can lead to a greater effect or potency. However, there may be optimal dosage ranges where the potency is maximized before plateauing or potentially causing adverse effects.

Concentration: The concentration of a drug refers to the amount of the drug present in a given volume or solution. A higher concentration of a drug can increase its potency since a greater quantity of the active substance is available to interact with the target receptors or sites.

Number of exposures: The number of times a person is exposed to a drug can also impact its potency. In some cases, repeated exposures can lead to an accumulation of the drug in the body, resulting in increased potency or stronger effects. However, this can also lead to tolerance, where the body becomes less responsive to the drug over time, requiring higher doses for the same effect.

Exposure method: The way a drug is administered or exposed to the body can affect its potency. Different routes of administration (e.g., oral, intravenous, inhalation, topical) can result in variations in the drug's absorption, distribution, and metabolism, which can influence its potency and onset of action.

It's important to note that potency is different from efficacy, which refers to the maximum therapeutic effect a drug can produce. Potency specifically relates to the amount of drug required to produce a particular effect.

Answer:

B/Ti

Explanation:

Answer:

the answer is B

Explanation:

The growth of the new plant depicts the asexual reproduction characteristic. The characteristic that describes the growth of the new plant in Stephan's mother cutting a twig from a rose bush and planting it in the soil is asexual reproduction.

Asexual reproduction is the mode of reproduction by which organisms generate offspring that are identical to the parent's without the fusion of gametes. Asexual reproduction is a type of reproduction in which the offspring is produced from a single parent.

The offspring created are clones of the parent plant, meaning they are identical to the parent.The new plant in Stephan’s mother cutting a twig from a rose bush and planting it in the soil depicts the process of asexual reproduction, which is the ability of a plant to reproduce without seeds. In asexual reproduction, plants can reproduce vegetatively by cloning themselves using their roots, bulbs, or stems.

Know more about    characteristic  here:

https://brainly.com/question/28790299

#SPJ8

Answer: 2.5 lit

Explanation:

Answer: Formula:

pH=−log[H

+

]

when pH=4

[H

+

]=10

−pH

=10

−4

when pH=2

[H

+

]=10

−pH

=10

−2

According to the provided orbital diagram, Hund's Rule looks to be the electron rule that is broken. According to Hund's rule, when degenerate orbitals with equal energy are accessible, electrons will first fill them individually before doing so in pairs.

While it should have been singly occupied in a distinct 2p orbital before partnering up, the second electron in the 2p orbital in the following diagram is paired with the first electron. Therefore, B. Hund's Rule is the appropriate response.

learn more about Hund's rule here

https://brainly.com/question/2104472

#SPJ1

Answer:

coochie man? lol it's probably D or B :D

Answer:

             5-bromo-2-methylheptane

Explanation:

                    Select heptane as the longest parent chain. Start numbering from methyl end because it is the smallest number as compare to 3 bromide (if started from the other end). Bromide will get 5th position. In writing the name bromo is written first due to alphabetical order.

The cell potential for the electrochemical cell has been 1.40 V.

The standard reaction for the cell will be:

\(\rm 3\;Cl_2\;+\;2\;Fe\;\rightarrow\;6\;Cl^-\;+\;2\;Fe^3^+\)

The half-reaction of the cells has been:

\(\rm Fe^3^+\;+\;3\;e^-\;\rightarrow\;Fe\)

The potential for this reduction has been -0.04 V.

\(\rm Cl_2\;+\;2\;e^-\;\rightarrow\;2\;Cl^-\)

The potential for the reduction has been 1.36 V.

The cell potential has been: Potential of reduction - Potential of oxidation

Cell potential = 1.36 - (-0.04) V

Cell potential = 1.40 V.

The cell potential for the electrochemical cell has been 1.40 V.

For more information about the electrochemical cell, refer to the link:

https://brainly.com/question/22550969

Answer:

A)He, Ne, and Ar

Explanation:

I believe its this one. Sorry if its wrong. Remember that 8 electrons are in the outermost energy level .

Answer:

0.0505

Explanation:

Step 1: Calculate the masses of solute and solvent

We have a 15.7% by mass nitric acid solution, that is, there are 15.7 g of nitric acid (solute) per 100 g of solution. The mass of water (solvent) is:

m(solution) = m(solute) + m(solvent)

m(solvent) = m(solution) - m(solute)

m(solvent) = 100 g - 15.7 g = 84.3 g

Step 2: Calculate the moles of nitric acid

The molar mass of nitric acid is 63.01 g/mol.

15.7 g × (1 mol/63.01 g) = 0.249 mol

Step 3: Calculate the moles of water

The molar mass of water is 18.02 g/mol.

84.3 g × (1 mol/18.02 g) = 4.68 mol

Step 4: Calculate the mole fraction of nitric acid

\(X(HNO_3) = \frac{nHNO_3}{nHNO_3+nH_2O} = \frac{0.249mol}{0.249mol+4.68mol} = 0.0505\)

Answer:i try and try but nobody likes me

Explanation: that's the story of the day lucky person brainiest pls

hehehhehehhehehehehehhehhehehehehehehehehehehe

Answer:

sodium perchorate is NaCLO4

calcium sulfite CaSO3

potassium hydroxide KOH

lithium nitrate LiNO3

Explanation:

sodium perchorate has one Sodium

one Chlorine and 4 Oxygen

calcium sulfite has one Calcium on sulfate and 3Oxygen

lithium nitrate has one Lithium oneNitrogen

3 Oxygen

Answer:

To determine the identity of metal X, we need to compare the standard reduction potentials of the possible metals with the standard reduction potential of the Mg half-reaction.

From Table 18.1, we can find the standard reduction potentials for each of the metals listed:

Pb: -0.13 V

Zn: -0.76 V

Ni: -0.25 V

Fe: -0.44 V

Mn: -1.18 V

The reduction half-reaction for the Mg electrode is:

Mg2+ + 2e- → Mg E° = -2.37 V

The overall reaction for the galvanic cell is:

Mg(s) + X2+(aq) → Mg2+(aq) + X(s)

The standard cell potential is given by:

E°cell = E°(cathode) - E°(anode)

where the cathode is the reduction half-reaction and the anode is the oxidation half-reaction.

Substituting the given values, we get:

1.61 V = E°(X2+/X) - (-2.37 V)

Simplifying, we get:

E°(X2+/X) = 1.61 V + 2.37 V = 3.98 V

Comparing E°(X2+/X) with the standard reduction potentials in Table 18.1, we see that only zinc (Zn) has a reduction potential that is more negative than 3.98 V. Therefore, the metal X is zinc (Zn).

Therefore, the answer is (b) Zn.

Answer:

jesus

Explanation:

Jesus is always the answer LOL

Potential energy is often referred to as the energy of position or composition. The energy that an object has due to its tension, electric charge, or relative immobility in space is known as potential energy. Potential energy is among the two basic forms of energy.

William Rankine, a Scottish engineer and physicist, coined the phrase "potential energy" in the 19th century. Potential energy comes in a variety of forms, each linked to a particular kind of force. It is the power imparted to an object by its position in relation to other objects. Learn more about potential energy in this article, which includes a definition, several categories, and examples.

The force acting on the two objects affects the formula for potential energy. The following is the formula for gravitational force:

W = m×g×h = mgh

Where,

Potential Energy Unit

In terms of units, kinetic energy and gravitational potential energy are equivalent: kg m2 / s2.

The unit used to measure all energy is the joule, which has the same units as kg m2 / s2 (J).

Learn more about Potential Energy here

https://brainly.com/question/24284560

#SPJ9

We can see here that the best fuel is the one that produces the most heat per unit mass. In this case, the fuel that produces the most heat per unit mass is methanol.

Fuel is a substance that is used to produce energy through combustion or other chemical reactions. It is commonly utilized to power various forms of transportation, generate heat or electricity, and operate machinery and appliances.

The results of the experiment are shown below:

Fuel            Mass (g)      Heat produced (J)       Heat per gram (J/g)

Methanol 1.0                          350                   350

Ethanol         1.0                          250                   250

Propane         1.0                          200                   200

Butane         1.0                          150                            150

Pentane         1.0                          100                            100

It is important to note that the results of this experiment are only a measure of the heat produced by the fuels.

Learn more about fuel on https://brainly.com/question/10172005

#SPJ1

Answer:

shduxhheufufffhduduf

According to the claim, Balloon A, which has more blue and less orange, exhibits accurate effusion at a relative effusion rate of 1.303. (orange is 1.303 times more effused than blue).Relative rate of effusion for the orange to blue spheres = 1.531.

The process of effusion is when a gas escapes from a container through a hole that is significantly smaller in diameter than the molecules' mean free path.

Gas molecules flow through a small opening in one container and into another by effusion. Graham's law allows rates of effusion to be compared at the same temperature. Diffusion is the random molecular motion-based movement of gas molecules through one or more other types of gas.

Rate of effusion of Orange / Rate of effusion of blue

= [Mblue / Morange]^1/2

Vrms = sqrt [(3RT/M)]

Vorange / Vblue = [ Mblue / Morange]^1/2

Rate of effusion of Orange / Rate of effusion of blue

= 565/ 369

= 1.531

Thus,  Balloon A, which has more blue and less orange, exhibits accurate effusion at a relative effusion rate of 1.303.

To learn more about the effusion, follow the link;

https://brainly.com/question/26882632

#SPJ1

The scratched tin can with the iron will more rapidly corrode the iron than the tin.

The corrosion can be given as the process of the oxidation of the metal into the more stable metal oxide. The chemical oxidation of the metal is attained with the surrounding available oxygen or the water vapors.

The reactivity of the Iron for the oxidation is more as compared to the tin from the reactivity series. Therefore if both tin and iron are exposed to corrosion, iron will be more rapidly corroded.

Learn more about corrosion, here:

https://brainly.com/question/489228

#SPJ1

Answer: 2 H2 + O2 → 2 H2O, you get the same number of moles of water as H2, as long as you have 1 mole of O2. So, with 3 moles of H2, as long as you have 1.5 moles of O2, you will get 3 moles of H2O. In my opinion.