Solid lead acetate is slowly added to 75.0 mL of a 0.0492 M sodium sulfate solution. What is the concentration of lead ion required to just initiate precipitation?

TT with Tt

or TT with TT

would give a tall plant

Answer:

50/400 × 100/1

0.125 × 100

= 12.5%

Answer:  You meant in constant temperature?

Because temperature is not mentioned at the beginning.

I suppose temperature remains constant, otherwise

there is no enough data for solving the problem

Explanation: According Boyle´s law in constant temperature

pV = constant.  So p1V1 = p2V2   and pressure p2 = p1V1 /V2

= 88 atm · 18 l / 12 l =  132 atm.

If I have 18 liters of gas at a pressure of 88 atm, the final pressure of the gas if the volume of the gas is decreased to 12 liters under constant pressure is 132atm.

The pressure of gas at constant temperature can be calculated using Boyle's law equation as follows:

P1V1 = P2V2

Where;

The final pressure of the gas can be calculated as follows:

88 × 18 = 12 × P2

1584 = 12P2

P2 = 1584 ÷ 12

P2 = 132atm

Therefore, have 18 liters of gas at a pressure of 88 atm, the final pressure of the gas if the volume of the gas is decreased to 12 liters under constant pressure is 132atm.

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Answer: pH = 2.68

Explanation: pH = - log[H3O^+] .

 HCl reacts with water : HCl + H2O ->  Cl^- + H3O^+

So [H3O^+] = c(HCl) = 0.0021 M

pH = - log(0.0021) = 2.68

Answer: The balanced equation is [tex]2KOH + H_{2}SO_{4} \rightarrow K_{2}SO_{4} + 2H_{2}O[/tex] and the concentration of the sulfuric acid solution is 0.184 M.

Explanation:

Given: [tex]V_{1}[/tex] = 27.5 mL,       [tex]M_{1}[/tex] = 0.235 M

[tex]V_{2}[/tex] = 35.0 mL,            [tex]M_{2}[/tex] = ?

Formula used to calculate the concentration of the sulfuric acid solution is as follows.

[tex]M_{1}V_{1} = M_{2}V_{2}[/tex]

Substitute the values into above formula as follows.

[tex]M_{1}V_{1} = M_{2}V_{2}\\0.235 M \times 27.5 mL = M_{2} \times 35.0 mL\\M_{2} = \frac{0.235 M \times 27.5 mL}{35.0 mL}\\= 0.184 M[/tex]

The given chemical equation for given reaction is as follows.

[tex]KOH + H_{2}SO_{4} \rightarrow K_{2}SO_{4} + H_{2}O[/tex]

Number of atoms on reactant side are as follows.

Number of atoms on product side are as follows.

To balance this equation, multiply KOH by 2 on reactant side and multiply [tex]H_{2}O[/tex] by 2. Hence, the equation can be rewritten as follows.

[tex]2KOH + H_{2}SO_{4} \rightarrow K_{2}SO_{4} + 2H_{2}O[/tex]

Now, number of atoms on reactant side are as follows.

Number of atoms on product side are as follows.

Since, there are same number of atoms of both reactant and products. Therefore, the equation is now balanced.

Thus, we can conclude that the balanced equation is [tex]2KOH + H_{2}SO_{4} \rightarrow K_{2}SO_{4} + 2H_{2}O[/tex] and the concentration of the sulfuric acid solution is 0.184 M.

Answer:

Kind of like DNA or a part of DNA

Explanation:

They are what make you a person, no they aren't the same

Answer:

The De Broglie hypothesis proposes that all matter exhibits wave-like properties and relates the observed wavelength of matter to its momentum. After Albert Einstein's photon theory became accepted, the question became whether this was true only for light or whether material objects also exhibited wave-like behavior.

Answer:

A substance that produces hydrogen gas when dissolved

Answer:

3.033

Explanation:

67.94/22.4= 3.033

I hope lol

Answer:

- Identify the acid and base in the reaction.

- What is left of the base after the reaction is known as the conjugate acid, while what is left of the acid after the reaction is known as the conjugate base.

Explanation:

Types of acids and bases:

When we are looking at conjugate acid and base, the type of acid and base we should focus on are Brønstead acid and base.

Brønsted acid: proton donor

Brønsted base: proton acceptor

Do note that proton here refers to hydrogen ion, H⁺.

Other types of acids and bases includes arrhenius acid/base and Lewis acid/base.

Definition:

Conjugate acid is what remains of the acid when a Brønsted acid donates a proton, while conjugate base is the newly formed protonated species when a Brønsted base accepts a proton.

Example:

Let's look at an example of a Brønsted acid-base reaction:

NH₃(aq) +H₂O(l) ⇌ NH₄⁺(aq) +OH⁻(aq)

Here, the base is NH₃ and the acid is H₂O.

NH₄⁺ is the conjugate acid, while OH⁻ is the conjugate base.

Note:

For a Brønsted acid- base reaction, whether a substance behaves as an acid or a base depends on what it is reacting with. Although H₂O behaves as an acid in this example, it behaves as a base when reacting with HCl.

Answer:

The chemical symbol will be "[tex]_{29}^{63.5}\textrm{Cu}[/tex]".

Explanation:

The given values are:

Current,

I = 2.50 amps

Time,

t = 2 hr

or,

 = 7200 sec

Metal deposited,

W = 5.93 gm

As we know,

⇒  [tex]W=Z\times i\times t[/tex]

or,

⇒  [tex]Z=\frac{W}{i\times t}[/tex]

On putting the given values, we get

⇒      [tex]=\frac{5.93}{2.5\times 7200}[/tex]

⇒      [tex]=3.2945\times 10^{-4}[/tex]

hence,

⇒ [tex]Atomic \ mass=Z\times electrons\times 96500[/tex]

⇒                       [tex]=3.2945\times 10^{-4}\times 2\times 96500[/tex]

⇒                       [tex]=63.5[/tex]

Thus the above is the right answer.

2K(s) + F₂(g) --> 2KF(s)

The physical stare of potassium is solid(s) and that of potassium fluoride is solid(s) so, s will be put on both the blanks.

Now, In order to balance florine, we will put 2 for potassium floride, afterwards florone will be 2 on both side of equation but now potasium will become unbalnced so, we will put 2 for potassium. Thus, both sides of the equation will be balanced.

--------------------------------------------------------

P.S- Sorry, If I fail in properly explaining it to you.

Answer:

Bromine loses an electron.

Explanation:

Hello there!

In this case, according to the given chemical reaction, it will be possible for us to realize that as the reaction progresses, we see that the bromine, as it is initially negative, it increases the oxidation state as it loses an electron for which it is oxidized.

Moreover, no change is potassium is evidenced as it remains as the cation in the reaction; therefore, the answer is Bromine loses an electron.

Regards!

Answer:

The above answer is correct

Explanation:

I took the test

Answer:

13 mol NO

Explanation:

Step 1: Write the balanced equation

4 NH₃(g) + 5 O₂(g) ⇒ 4 NO(g) + 6 H₂O(g)

Step 2: Establish the appropriate molar ratio

According to the balanced equation, the molar ratio of O₂ to NO is 5:4.

Step 3: Calculate the number of moles of O₂ needed to produce 16 moles of NO

We will use the previously established molar ratio.

16 mol O₂ × 4 mol NO/5 mol O₂ = 13 mol NO

Answer:

the error could have been the fact that the unit for volume wasn't changed from cm³ to dm³

hence the calculation error

the solution to this would be first dividing the volume by 1000 to get that same amount in dm³ which is the standard unit to be used for volume-density calculations

We are given:

Initial Temperature = 90°c

Final Temperature = 120°c

Heat applied(ΔH) = 500 Joules

Specific heat(c) = 0.9 Joules / g°C

Mass of Aluminium(m) = ?

Change in temperature:

ΔT = Final temp. - Inital Temp.

ΔT = 120 - 90

ΔT = 30°c

Calculating the mass:

We know the formula:

ΔH = mcΔT

replacing the values:

500 = m(0.9)(30)

500 = m(27)

m = 500/27

m = 18.52 grams

Answer:

hi the ans is A.

..............

Answer: The value of [tex]\Delta G_{rxn}[/tex] for given equation is 119.096 kJ.

Explanation:

Given: [tex]\Delta H = 163.2 kJ[/tex] (1 kJ = 1000 J) = 163200 J

[tex]\Delta S = -148 J/K[/tex]

T = 298 K

Formula used to calculate [tex]\Delta G_{rxn}[/tex] is as follows.

[tex]\Delta G_{rxn} = \Delta H - T \Delta S[/tex]

Substitute the values into above formula as follows.

[tex]\Delta G_{rxn} = \Delta H - T \Delta S\\= 163200 J - (298 \times -148 J/K)\\= 163200 J - 44104 J\\= 119096 J \\= 119.096 kJ[/tex]

Thus, we can conclude that the value of [tex]\Delta G_{rxn}[/tex] for given equation is 119.096 kJ.

Answer:

207

No, it is nonspontaneous at all temperatures

Explanation:

This is like 8 months later so im just putting this for people that need it still.

Answer:

Mg + 2 HCl ⇒ MgCl₂ + H₂

10.1 L

Explanation:

Step 1: Write the balanced equation

Mg + 2 HCl ⇒ MgCl₂ + H₂

Step 2: Calculate the moles corresponding to 10.0 g of Mg

The molar mass of Mg is 24.31 g/mol.

10.0 g × 1 mol/24.31 g = 0.411 mol

Step 3: Calculate the moles of H₂ produced from 0.411 moles of Mg

The molar ratio of Mg to H₂ is 1:1. The moles of H₂ produced are 1/1 × 0.411 mol = 0.411 mol

Step 4: Calculate the volume occupied by 0.411 moles of H₂

0.411 moles of H₂ are at 1.00 atm and 25 °C (298 K). We can calculate the volume occupied using the ideal gas equation.

P × V = n × R × T

V = n × R × T / P

V = 0.411 mol × (0.0821 atm.L/mol.K) × 298 K / 1.00 atm = 10.1 L

Answer:

7.94x10⁻⁸ M

Explanation:

Using the pH given by the problem, we can calculate the pOH of the blood plasma:

Then we can proceed to calculate the [OH⁻] of the blood plasma, using the definition of pOH:

Answer:

A

Explanation:

A triglyceride (TG, triacylglycerol, TAG, or triacylglyceride) is an ester derived from glycerol and three fatty acids (from tri- and glyceride). Triglycerides are the main constituents of body fat in humans and other vertebrates, as well as vegetable fat.

The structure of option A shows a triglyceride.

Triglycerides are a kind of fat present in the blood. Triglycerides are the types of stored fats, which are not in use currently.

The structure of triglyceride is TRI esters containing glycerol bound to three fatty acid molecules.

Thus, the correct option is A.

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#SPJ2

Answer:

2, 8, 10, 2

Explanation:

Answer:

2, 8, 10, 2

Explanation: Titanium/Electrons per shell

Answer:

The answer would be charged particles.

Explanation:

Electric force exists as one of the most fundamental forces in the universe, it occurs between all charged particles.

Answer:answer in explanation try to understand dear

Explanation:Air pollutants have a negative impact on plant growth, primarily through interfering with resource accumulation. Once leaves are in close contact with the atmosphere, many air pollutants, such as O3 and NOx, affect the metabolic function of the leaves and interfere with net carbon fixation by the plant canopy.

Answer:

0.244 M.

Explanation:

From the question given above, the following data were obtained:

Molarity of stock solution (M₁) = 1 M

Volume of stock solution (V₁) = 0.305 L

Volume of diluted solution (V₂) = 1.25 L

Molarity of diluted solution (M₂) =?

The molarity of the diluted solution can be obtained by using the dilution formula as illustrated below:

M₁V₁ = M₂V₂

1 × 0.305 = M₂ × 1.25

0.305 = M₂ × 1.25

Divide both side by 1.25

M₂ = 0.305 / 1.25

M₂ = 0.244 M

Thus, the molarity of the diluted solution is 0.244 M

Answer:

I THINK IT IS TRUE  BECAUSE THEY ERE FIRST FOUND TO DEMOCRITUS ARISTOTLE AND PLATO THE ROMANS AND GREEK CHEMISTS .

Explanation:

Answer:

The plasma membrane, or the cell membrane, provides protection for a cell. It also provides a fixed environment inside the cell, and that membrane has several different functions. One is to transport nutrients into the cell and also to transport toxic substances out of the cell.

Answer:

H₂S + Cl₂ —> S + 2HCl

Explanation:

? + Cl₂ —> S + 2HCl

To balance the equation above, we must recognise what atoms are present in the products.

The products contains S, H and Cl.

Thus, S, H and Cl must also be present in the reactants.

Considering the equation given above, we can see clearly that H and S is missing in the reactants.

H and S together as a compound is expressed as H₂S.

Now, we shall input H₂S into the equation to obtain the complete equation. This is illustrated below:

? + Cl₂ —> S + 2HCl

H₂S + Cl₂ —> S + 2HCl

Next, we shall verify to see if the equation is balanced.

There are 2 atoms of H on both sides of the equation.

There are 2 atoms of Cl on both sides of the equation.

1 atom of S exist on both sides of the equation.

Thus, the equation is balanced.