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ryzh [129]
3 years ago
10

Use the equation editor or "Insert Chemistry - WIRIS editor" to write the balanced molecular chemical equation for the reaction

of aqueous 0.13 M lead (II) nitrate, with 0.19 M potassium carbonate. You may need to consult Appendix E to determine the states of each reactant and product. Assume any insoluble products are completely insoluble.
Chemistry
1 answer:
11Alexandr11 [23.1K]3 years ago
4 0

Answer:

<u>Balanced equation:</u>

Pb(NO_{3})_{2}(aq)+K_{2}CO_{3}(aq)\rightarrow PbCO_{3}(s)+2KNO_{3}(aq)

Explanation:

The chemical reaction between Lead(II) Nitrate and potassium carbonate is as follows.

Lead(II)Nitrate+Potassium\,carbonate \rightarrow Lead(III)\,\,carbonate+Potassium\,nitrate

Pb(NO_{3})_{2}(aq)+K_{2}CO_{3}(aq)\rightarrow PbCO_{3}(s)+2KNO_{3}(aq)

<u>Ionic equation:</u>

Pb^{2+}(aq)+2NO_{3}^{-}(aq)+2K^{+}(aq)+CO_{3}^{2-}(aq)\Leftrightarrow PbCO_{3}(s)+K^{+}(aq)+2NO_{3}^{-}

Cancel the same ions on the both sides of the reaction.

The net ionic equation is as follows.

Pb^{2+}(aq)+CO_{3}^{2-}(aq)\Leftrightarrow PbCO_{3}(s)

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Consider the chemical formula for one unit of aluminum sulfate, Al2(SO4)3. How many total atoms would be present in 22 units of
EastWind [94]

Answer:

1.32×10²⁵ atoms of sulfate are contained in 22 units of it

Explanation:

1 unit = 1 mol

Al₂(SO₄)₃ → Aluminum sulfate

As 1 unit = 1 mol, 1 unit has 6.02×10²³ atoms of aluminum sulfate.

Let's make a rule of three:

1 unit of Al₂(SO₄)₃ contains 02×10²³ atoms

Then, 22 units of Al₂(SO₄)₃ must contain (22 . 6.02×10²³) / 1 = 1.32×10²⁵ atoms

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3 years ago
2. ATO kg bouting ball would require what force to accelerate down an alleyway at a rate of ons?
Mars2501 [29]

Answer:

  • 2. 30N
  • 3. 5,000N
  • 4. 15 kg
  • 5. 2,800 kg

Explanation:

<em>2. A 10 kg bowling  ball would require what force to accelerate down an alleyway at a rate of 3m/s² ?</em>

Notice that I completed the question with the garbled and missing values:

<u>Data:</u>

  • F = ?
  • m = 10 kg
  • a = 3m/s²

<u />

<u>Physical principles:</u>

  • Newton's second law: F=m\times a

<u>Solution:</u>

  • Substitute and compute

        F=10kg\times 3m/s^2=30N

<em></em>

<em>3. Salty has a car that accelerates at 5 m/s². If the car has a mass of 1000 kg, how much force does the car produce?</em>

Notice that I arranged the typos.

<u />

<u>Data:</u>

  • F = ?
  • m = ?
  • a = ?

<u>Physical principles:</u>

  • Newton's second law: F=m\times a

<u>Solution:</u>

  • Substitute and compute

       F=1,000kg\times5m/s^2=5,000N

<em>4. What is the mass of a falling rock if it produces a force of 147 N?</em>

<u>Data:</u>

  • F = 147N
  • m = ?
  • a = falling rock

<u>Physical principles:</u>

  • neglecting air resistance ⇒ a = g: gravitational acceleration: 9.8m/s²
  • Newton's second law: F=m\times a

<u>Solution:</u>

  • Clear m from Newton's second law

         m=\dfrac{F}{a}

  • Substitute with F = 147 N and a = g = 9.8m/s², and compute

      m=\dfrac{147N}{9.8m/s^2}=15Kg

<em></em>

<em>5. What is the mass of a truck if it produces a force of 14,000 N while accelerating at a rate of 5 m/s²?</em>

<u>Data:</u>

  • F= 14,000N
  • m = ?
  • a =​ 5m/s²

<u>Physical principles:</u>

  • Second Newton's law: F=m\times a

<u>Solution:</u>

  • Clear m from Newton's second law

         m=\dfrac{F}{a}

  • Substitute with F = 14,000 N and a = 5m/s², and compute

      m=\dfrac{14,000N}{5m/s^2}=2,800kg

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