Write a neutralization reaction for each acid and base pair. Express your answer as a balanced chemical equation. Identify all of the phases in your answer.

a. HClO4(aq) and NaOH(aq)
.
b. HBr(aq) and Ca(OH)2(aq)
.

Calcium Dihydrogen Phosphate has the proper chemical formula Ca(H₂PO₄)₂.

The inorganic compound Ca(H₂PO₄)₂ is known as monocalcium phosphate. Ca(H2PO4)2H2O is frequently encountered as the monohydrate. Both salts are solids without color. They are mostly employed as superphosphate fertilizers, while they are also widely utilized as leaveners.  Calcium Dihydrogen Phosphate hydrate is used in the production of glass, as a plastics stabilizer, and as a pH control reagent. When Calcium Hydroxide is neutralized with Phosphoric Acid, Phosphate Dihydrate precipitates as a solid, yielding Dicalcium Phosphate. The fact that dicalcium phosphate is safe for people is a very significant characteristic.

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The δh° for the process SB (s) + Cl2 (g) → SbCl5 (s) is -394 kJ using Hess's-Law.

Hess's Law states that the enthalpy change of a reaction is independent of the pathway taken and depends only on the initial and final states. By combining the given reactions, we can cancel out the intermediate compound (SbCl3) and obtain the desired reaction. The enthalpy change for the first reaction (SB (s) + Cl2 (g) → SbCl3 (s)) is -314 kJ, and for the second reaction (SbCl3 (s) + Cl2 (g) → SbCl5 (s)) is -80 kJ. By adding these two reactions, we obtain the overall reaction with a δh° of -394 kJ.

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According to the research, the correct option is electron energies are quantized. Max Planck was a popular German physicist who proposed that electron energies are quantized, considered to be the founder of quantum theory.

It is a probabilistic and quantification theory by Max Planck giving the name of the minimum amount of clusters to atoms that radiates energy formed by corpuscles in the form of light or heat only, as small packets.

In this sense, Planck assumed that light does not travel as a particle but as packets of light in the form of electromagnetic radiation which he called quanta, this was the basis on which what is known as quantum theory was founded.

Therefore, we can conclude that according to the research, the correct option is electron energies are quantized. Max Planck was a popular German physicist who proposed that electron energies are quantized, considered to be the founder of quantum theory.

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The major product(s) will be the ones that are formed via the most stable intermediate.

When an alkene is treated with concentrated HBr, the reaction is an electrophilic addition reaction, where the HBr molecule adds across the double bond of the alkene.

The reaction proceeds via a carbocation intermediate, which is formed by the addition of the H+ ion of HBr to one of the carbon atoms of the alkene.

The Br- ion then attacks the carbocation, resulting in the formation of a bromoalkane.

If the alkene has substituents, the reaction can result in the formation of multiple products, depending on the regiochemistry of the carbocation intermediate.

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Answer:

B

Explanation:

Answer:

B thats kinda funny that i just had that question

Explanation:

Answer: assume pathogens are present and treat the samples accordingly

Explanation:

When investigators are unable to conclusively ascertain the source of a biological sample found at a crime scene, the correct thing to do is to treat it as if pathogens are present in it and handle it according to set rules on how to handle pathogens.

This is done to ensure that if a pathogen is indeed present, it would not cause a health emergency by infecting those who come in contact with the samples at the scene.

Answer:

No definite shape

Explanation:

The correct option is $26785.To calculate the total cost per equivalent unit using the weighted average method, we need to consider the costs incurred in both the beginning work in process and the units added during the period.

First, let's calculate the equivalent units of production for both conversion and materials:

Conversion costs:

Beginning work in process: 400 units × 20% complete = 80 equivalent units

Units added during the period: 2,000 units × 40% complete = 800 equivalent units

Total equivalent units for conversion = 80 + 800 = 880 equivalent units

Material costs:

Beginning work in process: 400 units × 30% complete = 120 equivalent units

Units added during the period: 2,000 units × 50% complete = 1,000 equivalent units

Total equivalent units for materials = 120 + 1,000 = 1,120 equivalent units

Next, let's calculate the total costs incurred:

Conversion costs:

Beginning work in process cost: $14,880

Costs added during the period: $409,200

Total conversion costs = $14,880 + $409,200 = $424,080

Material costs:

Beginning work in process cost: $9,900

Costs added during the period: $180,080

Total material costs = $9,900 + $180,080 = $189,980

Now, we can calculate the total cost per equivalent unit:

Total cost per equivalent unit = (Total conversion costs + Total material costs) / (Total equivalent units for conversion + Total equivalent units for materials)

Total cost per equivalent unit = ($424,080 + $189,980) / (880 + 1,120)

Total cost per equivalent unit ≈ $267.85

Therefore, the correct option is $26785.

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\(CS_2\)  is the limiting reactant in the reaction.

The balanced chemical equation for the reaction is:

3 \(CS_2\) + 6 \(NaOH\) → 2 \(Na_2CS_3\) + \(Na_2CS_3\) + 3 \(H_2O\)

To determine the limiting reactant, we need to calculate the amount of product that each reactant can produce and compare it to the actual amount of product that is formed.

First, we need to convert the mass of \(CS_2\) to moles:

118.3 g \(CS_2\) × (1 mol \(CS_2\) /76.14 g \(CS_2\)) = 1.555 mol \(CS_2\)

Next, we need to calculate the amount of product that can be formed from 1.555 mol of \(CS_2\). According to the balanced equation, 3 mol of \(CS_2\) will produce 2 mol of \(Na_2CS_3\). Therefore, 1.555 mol of \(CS_2\) will produce:

(2/3) × 1.555 mol = 1.037 mol \(Na_2CS_3\)

Now, let's calculate the amount of product that can be formed from 3.12 mol of \(NaOH\). According to the balanced equation, 6 mol of \(NaOH\) will produce 2 mol of \(Na_2CS_3\). Therefore, 3.12 mol of \(NaOH\) will produce:

(2/6) × 3.12 mol = 1.04 mol \(Na_2CS_3\)

Comparing the amount of product that can be formed from each reactant, we see that 1.037 mol of \(Na_2CS_3\) can be produced from the 1.555 mol of \(CS_2\), while 1.04 mol of \(Na_2CS_3\) can be produced from the 3.12 mol of \(NaOH\). Therefore, the limiting reactant in the reaction is \(CS_2\).

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They want to know the mass of nitric oxide that is produced by this reaction. The balanced chemical equation for this reaction is:

4NH₃(g) + 5O₂(g) → 4NO(g) + 6H₂O(g)

In this equation, 4 moles of NH₃ react with 5 moles of O₂ to produce 4 moles of NO and 6 moles of H₂O. To find the mass of NO produced, we need to use the molar mass of NO. Molar mass of NO = 30.01 g/molTo find the mass of NO produced, we need to use stoichiometry.

We know that 4 moles of NH₃ reacts with 5 moles of O₂ to produce 4 moles of NO. Therefore, if we know the number of moles of O₂ that reacted, we can use stoichiometry to find the number of moles of NO produced.We can use the ideal gas law to find the number of moles of O₂ that reacted.

n = PV/RT  We can assume that the reaction took place at standard temperature and pressure (STP), which means:P = 1 atmV = 22.4 L (molar volume of an ideal gas at STP)T = 273.15 K (0 °C)R = 0.08206 L atm/(mol K)Using these values, we can find the number of moles of O₂ that reacted:n = PV/RT = (1 atm)(22.4 L)/(0.08206 L atm/(mol K) * 273.15 K) ≈ 1 mol

Therefore, 1 mole of O₂ reacted in the reaction. Using stoichiometry, we can find the number of moles of NO produced.4 moles NH₃ : 4 moles NO1 mole O₂ : 4/5 moles NO (from the balanced equation)1 mole O₂ was consumed, so the number of moles of NO produced is:1 mole O₂ * (4/5 moles NO/1 mole O₂) = 0.8 moles NO

Finally, we can find the mass of NO produced using the molar mass of NO:mass NO = number of moles * molar mass mass NO = 0.8 mol * 30.01 g/mol ≈ 24.0 g Therefore, approximately 24.0 grams of NO are produced by the reaction between ammonia and oxygen gas.

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Answer:

B

Explanation:

He gas has a higher average molecular speed than NO2 gas at the same temperature.

The average molecular speed in a sample of He gas at a certain temperature is 1.26×10^3 m/s, while the average molecular speed in a sample of NO2 gas is m/s at the same temperature.

The average molecular speed of a gas is determined by its temperature and molecular mass. The root mean square (RMS) speed is often used to calculate the average molecular speed of a gas. The RMS speed of a gas is given by the formula:

v = √(3kT/m)

where v is the RMS speed, k is Boltzmann's constant, T is the temperature in Kelvin, and m is the molecular mass of the gas.

To compare the average molecular speeds of He and NO2 gases, we need to know the temperature and molecular mass of NO2.

Unfortunately, the molecular speed of NO2 at the given temperature is missing from the question, so it is not possible to provide a direct comparison between the two gases.

However, we can still analyze the situation. Since He is a lighter gas with a smaller molecular mass than NO2, it is expected to have a higher average molecular speed at the same temperature. This is because lighter molecules move faster than heavier molecules at the same temperature.

In conclusion, without the molecular speed of NO2 at the given temperature, we cannot provide a specific comparison between the average molecular speeds of He and NO2.

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Answer: False

Explanation:

That’s not using mechanics

Answer:

False

Explanation:

Mechanical weathering breaks rocks into smaller pieces without changing their composition. Ice wedging and abrasion are two important processes of mechanical weathering. Chemical weathering breaks down rocks by forming new minerals that are stable at the Earth's surface.

Hope this helps☺️

One example of an element that can react negatively with gold is fluorine (F).

Fluorine is a highly reactive nonmetal and the most electronegative element on the periodic table. It readily accepts electrons to achieve a stable electron configuration.

When fluorine reacts with gold, it can form a compound known as gold trifluoride (AuF3). Gold trifluoride is a yellow solid that is thermodynamically unstable and decomposes at room temperature.

The reactivity of fluorine towards gold is attributed to the large electronegativity difference between the two elements. Fluorine's strong electron affinity and high electronegativity allow it to oxidize gold by accepting electrons from the gold atoms. This results in the formation of AuF3.

It's important to note that the reactivity of gold with fluorine is relatively uncommon and occurs under specific conditions. Gold's unreactive nature is one of the reasons it is highly valued and widely used in jewelry, electronics, and various other applications.

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Answer:

A chemical change results in a new substance being formed whereas a physical change will result in a different state of matter

Answers and explanations:

1) Lead, it is heavier than iron.

2) Lead, since it's heavier, it would have more mass and therefore more atoms.

3) (for sodium) 82.03379 gram x 6.23= 511.070512 grams= 417.05 pounds

(for sucrose) 342.29648(one molar)  x .65= 0.4 pound

The sodium would be heavier (not sure if accurate)

4) Because atoms are way too small to count, therefore we use molar masses.

Answer: Umm

Explanation:

I can't draw on the picture oh wait I can let me add my answer

Answer:Well just use the numbers in the chart and go from the bottom to the top. I understand that these are hard I would recommend watching a video on something that is similar to this problem and do it that way I understand if This is not much help but this question has stumped me. :(

Explanation:

The percent yield of the reaction is 82%

First step: make the chemist equation.

2 Al (s) + Fe2O3 (s) → 2 Fe (s) + Al2O3 (s)

As the statement says that aluminium is in excess, the limiting reactant is the Fe₂O₃.

Second step: Find out the moles in the reactant.

Molar weight Fe2O3: 159.7 g/m

Mass / Molar weight = moles

50 g /159.7 g/m = 0.313 moles

Third step: Analyse the reaction. 1 mol of Fe2O3 makes 2 moles of Fe.

1 mol Fe2O3 ____ 2Fe

0.313 mol Fe2O3 ____ 0.626 moles

Molar weight Fe = 55.85 g/m

Moles . molar weight = mass

55.85g/m . 0.626m = 34.9 grams

This will be the 100% yield of the reaction but we only made 22.6 g

34.9 g ____ 100%

22.6 g ____ 64.75 %

Hence, the percent yield is 64.75 %.

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Explanation:

rinse your mouth immediately and then seek doctor's attention

Answer:

Explanation:

The density of a substance can be found by using the formula

\(density = \frac{mass}{volume} \\\)

From the question

mass = 57.6 g

volume = 40.25 cm³

We have

\(density = \frac{57.6}{40.25} \\ = 1.431055900...\)

We have the final answer as

Hope this helps you

When you place hot copper in room temperature water, the water will heat up and the copper will cool down. The answer to the previous question does depend on the amount of each material.

This happens because of the difference in the specific heat capacity of the two materials.

Specific heat capacity is the amount of energy needed to raise the temperature of one gram of a substance by one degree Celsius. Copper has a lower specific heat capacity than water, which means it takes less energy to change its temperature compared to water. When copper is placed in water, it will transfer some of its heat energy to the water, causing the water to heat up. At the same time, the copper will cool down as it loses some of its heat energy to the water. The amount of temperature change in the water will be greater than the amount of temperature change in the copper because of the difference in their specific heat capacities.

The answer to the previous question does depend on the amount of each material. If you have a larger piece of copper and a smaller amount of water, the water will heat up more and the copper will cool down less. Conversely, if you have a smaller piece of copper and a larger amount of water, the water will heat up less and the copper will cool down more. If we placed the piece of copper in a lake, the water near the copper would heat up, but the effect on the temperature of the whole lake would be minimal due to the large volume of water. The same principle of heat transfer between materials with different specific heat capacities would still apply.

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Group 1 metals such as potassium should not be used in displacement reactions with Copper sulphate solution because Copper cannot displace potassium from a compound because copper is less reactive than potassium.

A displacement reaction, also known as single replacement reaction or exchange reaction, is described as a chemical reaction in which one element is replaced by another in a compound.

Most group 1 elements react with oxygen from the air to make metal oxides.

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The value of x should be 1/9.

The proportion of Californians who are elderly is 0.111.

The probability that a person has received a vaccine shot given that the person is elderly is 70%

The probability that a person has received a vaccine shot given that the person is not elderly is 2%

Probability that a person is elderly given that the person has received a vaccine shot is to be calculated.

Probability that a person is elderly and has received a vaccine shot,

P(E and V)=P(V | E) P(E)P(V | E) = 70%, P(E) = 0.111, soP(E and V) = (0.7) (0.111) = 0.0777

Probability that a person has received a vaccine shot, P(V) = P(E and V) + P(NE and V) P(NE) = (0.7) (0.111) + P(NE and V) P(NE) = 0.0777 + P(NE and V)P(NE and V) = P(V | NE) P(NE)P(V | NE) = 2%, soP(NE and V) = (0.02) (1 - 0.111) = 0.0178P(V) = 0.0777 + 0.0178 = 0.0955

Probability that a person is elderly given that the person has received a vaccine shot, P(E | V) = P(E and V) / P(V) = 0.0777 / 0.0955 = 0.8148(a) P(Bc|A) is the probability of driver’s blood alcohol percentage is not exceeding the legal limit, given that the breath analyzer indicates that legal limit is exceeded.

(b) We know that P(A|B) = P(Ac|Bc) = 0.95 and P(B) = 0.05P(A) = 1 - P(Ac) = 1 - 0.95 = 0.05P(Bc|A) = P(Ac|Bc) P(Bc) / P(A)P(Bc) = 1 - P(B) = 1 - 0.05 = 0.95P(Bc|A) = 0.95 × 0.95 / 0.05 = 18.05(c) P(B|A) = x and P(A) = 0.05P(Ac) = 0.95, P(B|Ac) = 0P(B|A) = P(B and A) / P(A)P(B and A) = P(B|A) P(A) = x (0.05)P(Bc|Ac) = 1 - x = P(Ac|Bc) = P(Bc|Ac) P(Ac) / P(Bc) = (1 - x) (0.95) / 0.95P(B) = P(B and A) + P(B and Ac) = x (0.05) + (1 - x) (0.95) = 0.95 - 0.9 x

Therefore,0.9 x = 0.95 - 0.05x = 1/9

Hence, the value of x should be 1/9.

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Iron oxide with Aluminium is the displacement reaction which will produce the most energy and is denoted as option A.

This is the reaction between Iron oxide and Aluminium and is characterized by large release of energy during combustion.

This is because of the large difference in reactivity between both of them during the displacement reaction.

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To calculate the number of water (H2O) molecules in 143 moles of water (H2O), we need to use Avogadro's number which is the number of particles (molecules or atoms) in one mole of substance, i.e., 6.022 × 10²³.

Here's how to solve for the number of H2O molecules in 143 moles:

Step 1: Find the number of molecules in one mole of H2OWe know that one mole of a substance contains 6.022 × 10 ²³ particles. Thus, one mole of H2O molecules contains 6.022 × 10²³ H2O molecules.

Step 2: Calculate the number of H2O molecules in 143 moles. Now that we know the number of H2O molecules in one mole of H2O, we can use this to find the number of H2O molecules in 143 moles of H2O: 6.022 × 10²³ H2O molecules/mol x 143 mol= 8.621 × 10²⁵ H2O molecules. Therefore, there are 8.621 × 10²⁵ H2O molecules present in 143 moles of H2O.

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Answer:

The term "battery"

Explanation:

Answer:

The answer is (A), the positive charge is the group number

Alkali metals are 1+

Alkaline Earth metals are 2+

Aluminum is in group 3 so the charge is 3+