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4 years ago

Which of the following would react most rapidly?

2 answers:

8 0

More acid = more rapid reaction, so a and c are out. Powdered zinc has more surface area than a single lump of it. More surface area means more is exposed to the reaction, and you get a faster reaction. The answer is B. Thank you for posting your question here at brainly. I hope the answer will help you. Feel free to ask more questions here.

Ronch [10]4 years ago

5 0

Answer:

b)powdered Zn in 2.0 M HCl at 40°C

Explanation:

The rate of reaction increases with increase in temperature, increase in concentration of the reactant and increase in surface area. Powered Zn has a greater surface area than a lump of Zn. Also 40°C is a higher temperature than 25°C. Furthermore, 2 M HCl is a more concentrated acid than 1 M HCl. Considering the above three factors powdered Zn in 2.0 M HCl at 40°C will react the fastest.

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Under appropriate conditions, nitrogen and hydrogen undergo a combination reaction to yield ammonia: N 2 (g) 3H 2 (g) 2NH3 (g) I

balandron [24]

Answer:

We need 1.714 moles N2

Explanation:

Step 1: Data given

The reaction yield = 87.5 %

Number of moles NH3 produced = 3.00 moles

Step 2: The balanced equation

N2(g)+ 3H2(g) →2NH3(g)

Step 3: Calculate moles N2

For 2 moles NH3 produced we need 1 mol N2 and 3 moles H2

This means, if the yield was 100%, for 3.00 moles NH3 produced , we need 1.5 moles N2

For a 87.5 % yield:

we need more N2, increased by a ratio of 100/87.5.

100/87.5 * 1.5 = 1.714 moles N2

5 0

3 years ago

Which type of property can be observed only by changing a substance into a different substance? A. intensive property B. extensi

Scorpion4ik [409]

The answer would be D because a chemical property is Burning is a chemical property and a chemical property is any of material's properties that becomes evident during or after a chemical reaction that is any quality that can be established only by changing a substance's chemical identity.

i hope i helped you out and i hope you did great and i am sorry if i am too late

3 0

3 years ago

Read 2 more answers

Which environmental changes occur fastest? oil spill changing seasons global warming pond succession Previous hurry plzz

ser-zykov [4K]

I’m not a 100% shure but I would personally say OIL SPILLS.

6 0

3 years ago

15.24. Calcium hydroxide, also known as slaked lime, is used in industrial processes in which low concentrations of base are req

Ivahew [28]

The concentration of the hydroxide ions, OH¯ in 250 mL of the solution containing the maximum amount of dissolved calcium hydroxide is 0.01728 M

We'll begin by calculating the number of mole of in 0.16 g of Ca(OH)₂. This can be obtained as follow:

Mass of Ca(OH)₂ = 0.16 g

Molar mass of Ca(OH)₂ = 40 + 2[16 + 1] = 74 g/mol

Mole = mass / molar mass

Mole of Ca(OH)₂ = 0.16 / 74

Next, we shall determine the molarity of the stock solution of Ca(OH)₂.

Mole of Ca(OH)₂ = 0.00216 mole

Volume = 100 mL = 100 / 1000 = 0.1 L

<h3>Molarity of Ca(OH)₂ =? </h3>

Molarity = mole / Volume

Molarity of Ca(OH)₂ = 0.00216 / 0.1

<h3>Molarity of Ca(OH)₂ = 0.0216 M</h3>

Next, we shall determine the molarity of the diluted solution. This can be obtained as follow:

Volume of stock solution (V₁) = 100 mL

Molarity of stock solution (M₁) = 0.0216 M

Volume of diluted solution (V₂) = 250 mL

<h3>Molarity of diluted solution (M₂) =?</h3>

0.0216 × 100 = M₂ × 250

2.16 = M₂ × 250

Divide both side by 250

M₂ = 2.16 / 250

Thus, the molarity of the diluted solution is 0.00864 M

Finally, we shall determine the concentration of the hydroxide ions, OH¯ in the diluted solution. This can be obtained as follow:

Ca(OH)₂(aq) —> Ca²⁺(aq) + 2OH¯(aq)

From the balanced equation above,

1 mole of Ca(OH)₂ contains 2 moles of OH¯

Therefore,

0.00864 M Ca(OH)₂ will contain = 2 × 0.00864 = 0.01728 M OH¯

Thus, the concentration of the hydroxide ions, OH¯ in 250 mL of the solution containing the maximum amount of dissolved calcium hydroxide is 0.01728 M

Learn more: brainly.com/question/11471182

7 0

3 years ago

If water was used to rinse the burette used to dispense the hydrochloric acid solution, how would this affect

Rufina [12.5K]

Answer:

The concentration of hydrochloric acid would be estimated to be less.

Explanation:

This is because, the hydroxyl ions from water react with the hydrogen ions from the hydrochloric acid, hence decreasing the moles of hydrogen ions which lowers the acidic strength of Hydrochloric acid.

7 0

3 years ago