In the equation PbO2 + 4HCl → 2H2O + PbCl2 + Cl2, how many electrons are transferred? A. 1 B. 2 C. 3 D. 4

Answers

Answer 1

Answer:

The answer is NOT 4... I took the test!

Answer 2

Answer: PbO2+2e ->Pb^2+
2Cl^- ->Cl2+2e
so 2e are transferred

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The ph of a 0.001 m hcl solution is closest to

a. 1
b. 7
c. 3
d. 10

Answers

C 3 is the answer because its right

if you have 3.50 moles of hydrogen and 5.00moles of nitrogen to produce ammonia, witch element is the reactant in excess? 3H2+N2=2NH3

Answers

Given 3.50 moles of hydrogen and 5.00 moles of nitrogen to produce ammonia, nitrogen is the excess reactant.

What is the excess reactant?

The excess reactant is the reactant in a chemical reaction with a greater amount than necessary to react completely with the limiting reactant.

Step 1: Write the balanced equation.

3 H₂ + N₂ ⇒ 2 NH₃

Step 2: Establish the theoretical ratio.

The theoretical ratio (TR) of H₂ to N₂ is 3:1.

Step 3: Establish the experimental ratio.

The experimental ratio (ER) of H₂ to N₂ is 3.50:5.00 = 0.70:1.

Step 4: Determine the excess reactant.

Comparing TR and ER, we can realize that there is not enough hydrogen to react with the nitrogen. Thus, nitrogen is the excess reactant.

Given 3.50 moles of hydrogen and 5.00 moles of nitrogen to produce ammonia, nitrogen is the excess reactant.

Learn more about excess reactant here: brainly.com/question/17199947

Answer : The $N_2$ element is the reactant in excess.

Solution : Given,

Moles of $N_2$ = 5 moles

Moles of $H_2$ = 3.50 moles

The balanced chemical reaction is,

$3H_2(g)+N_2(g)\rightarrow 2NH_3(g)$

From the balanced reaction we conclude that

As, 3 moles of $H_2$ react with 1 mole of $N_2$

So, 3.5 moles of $H_2$ react with $(3.5)/(3)=1.16$ moles of $N_2$

The excess of $N_2$ = 5 - 1.16 = 3.84 moles

That means in the given balanced reaction, $H_2$ is a limiting reagent because it limits the formation of products and $N_2$ is an excess reagent.

Hence, the $N_2$ element is the reactant in excess.

In a titration, 20.0 milliliters of 0.15 M HCI(aq) is exactly neutralized by 18.0 milliliters of KOH(aq).Complete the equation in your answer booklet for the neutralization reaction by writing the formula of each product.

KOH(aq) + HCl(aq)==> ________ +________

Compare the number of moles of H+(aq) ions to the number of moles of OH-(aq) ions in the titration mixture when the HCl(aq) is exactly neutralized by the KOH(aq).

Determine the concentration of the KOH(aq).

Answers

The reaction yields H2O and KCl (remember that neutralization reactions produce water and a salt).When HCl is exactly neutralized by KOH, you are left with no excess H+ or OH- from the strong acid or strong base. Also, since both the acid and base are strong, their conjugate base and conjugate acid, respectively, have negligible basicity. Therefore, the final solution is of neutral pH and there are equal amounts of H+(aq) and OH-(aq).Since the acid is monoprotic and the base releases only 1 OH- per molecule dissociated, you need not worry about dissociation constants. In this case, you find the molarity using M1V1 = M2V2. You are finding M2, so M2 = M1V1/V2 = (0.15)(20.0)/(18.0) = 0.17M (this is considering significant figures).

Which of these scenarios involve a reaction that is at equilibrium? a. the reaction is producing reactants and products at an equal rate.
b. the reaction is producing more reactants than products.
c. the reaction is only producing products
d. the reaction is producing more products than reactants.

Answers

at equilibrium the reaction is producing reactants and product at an equal rate so option A is correct hope this helps

Answer:

a. the reaction is producing reactants and products at an equal rate. is the correct answer.

Explanation:

If a reaction is at equilibrium then the reaction rates for both the reverse and forward directions are equal.

catalyst that increases the reaction rate of a reaction, but it does not change the equilibrium state for that reaction.

Thus at the equilibrium stage, the concentration of the reactants and the product remain constant.

Which of the following statements describes the process of deposition?A. Soil becomes rich through erosion allowing for ample plant growth.
B. Minerals are deposited into the soil through erosion.
C. The surface area of rocks decreases because of acid rain.
D. Materials are transported through erosion and are dropped in another location.

Answers

Deposition can be best described as materials being transported through erosion that are dropped in another location. When the sea loses energy, the elements it has been carrying - such as rocks, pebbles and sand - are dropped in a new place.

Which of the following statements describes the process of deposition?Deposition can be best described as materials being transported through erosion that are dropped in another location, so the answer is D.

Which development was a direct result of thebaby boom that followed World War II?
(1) decrease in school construction
(2) increase in suburbanization
(3) decline in crime rates
(4) rise in immigration

Answers

"(2) increase in suburbanization" was a direct result of the baby boom that followed World War II, but of course there were other factors that resulted as well.

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