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2 years ago

While rowing in a race, John pulls the handle of an oar 0.80 m on each

Chemistry

1 answer:

Korvikt [17]2 years ago

8 0

Answer:

Stroke D (Output Distance) = 0.533 meter (Approx)

Explanation:

Given:

Stroke D (Input Distance) = 0.80 meter

Mechanical advantage (MA) = 1.5

Find:

Stroke D (Output Distance) = ?

Computation of Stroke D (Output Distance) :

⇒ Stroke D (Output Distance) = Stroke D (Input Distance) / Mechanical advantage (MA)

⇒Stroke D (Output Distance) = 0.80 meter / 1.5

⇒ Stroke D (Output Distance) = 0.533 meter (Approx)

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Nookie1986 [14]

Answer: The chemical equations are given below.

Explanation:

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$3Fe(s)+4H_2O(g)\rightarrow Fe_3O_4(s)+4H_2(g)$

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By Stoichiometry of the reaction:

1 mole of iron nitrate reacts with 3 moles of sodium hydroxide to produce 1 mole of iron hydroxide and 3 moles of sodium nitrate.

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The chemical equation follows:

$10FeSO_4+2KMnO_4+8H_2SO_4\rightarrow 5Fe_2(SO_4)_3+K_2SO_4+2MnO_4+8H_2O$

By Stoichiometry of the reaction:

10 moles of iron(II) sulfate reacts with 2 moles of potassium permangante and 8 moles of sulfuric acid to produce 5 moles of iron(III) sulfate, 1 mole of potassium sulfate, 2 moles of manganese oxide and 8 moles of water.

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The chemical equation follows:

$Fe+H_2SO_4\rightarrow FeSO_4+H_2$

By Stoichiometry of the reaction:

1 mole of iron reacts with 1 mole of sulfuric acid to produce 1 mole of iron sulfate and 1 mole of hydrogen gas.

For e: A solution of $Fe(NO_3)_2$ and $HNO_3$ is allowed to stand in air.

The chemical equation follows:

$3Fe(NO_3)_2+4HNO_3\rightarrow 3Fe(NO_3)_3+NO+H_2O$

By Stoichiometry of the reaction:

3 moles of iron(II) nitrate reacts with 4 moles of nitric acid to produce 3 moles of iron(III) nitrate, 1 mole of nitric oxide and 1 mole of water.

For f: $FeCO_3$ is added to a solution of $HClO_4$

The chemical equation follows:

$FeCO_3+2HClO_4\rightarrow Fe(ClO_4)_2+CO_2+H_2O$

By Stoichiometry of the reaction:

1 mole of iron(II) carbonate reacts with 2 moles of perchloric acid to produce 1 moles of iron(II) perchlorate, 1 mole of carbon dioxide and 1 mole of water.

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The chemical equation follows:

$2Fe+O_2\rightarrow 2FeO$

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2 moles of iron reacts with 1 mole of oxygen gas to produce 2 moles of iron(II) oxide.

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A student needs to dilute a 0.25 M Pb(NO3)2 solution to make 73.0 mL of 0.13 M Pb(NO3)2 . Set up the calculation by placing the

Dmitry_Shevchenko [17]

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